Download Maintenance & Inspection Guide - Johnstech

PAD SERIES TEST CONTACTOR 

Pad ROL 200KR 

Kelvin-Ready 

Maintenance 

& Inspection 

Guide 

Your Contact for Higher Performance

Pad ROL 200KR 

For questions about anything 

contained in this Maintenance 

& Inspection Guide, contact 

your local Johnstech 

representative. 

If you are experiencing a 

technical problem or issue, 

fill out the online Tech Help 

Form at: 

www.johnstechhelp.com 

(All forms will be responded 

to within two business days.) 

OR contact the nearest Field 

Service Office. 

(Turn to the back cover for 

addresses/phone numbers.) 

2 

www.johnstech.com 

©2012 Johnstech International Corporation 

All rights reserved. 

ABOUT JOHNSTECH 

Since 1992, Johnstech International Corporation, headquartered in Minneapolis, 

MN, has been a leading provider of interconnect solutions for semiconductor 

manufacturers who want higher first-pass yields and lower overall cost of test. 

Johnstech’s high performance Test Contactors are available in Pad, Leaded, 

BGA, and Edge packages and are based on patented technology that provides 

superior electrical and mechanical performance. Johnstech also partners 

with Handler, Tester and Load Board manufacturers to ensure appropriate 

interfaces. With offices in the United States and Singapore; Field Service offices 

in California, Singapore, Philippines; and representation in China, Israel, Japan, 

Korea, Southeast Asia (Malaysia, Philippines, Singapore, Thailand) and Taiwan, 

Johnstech is proud to provide worldwide service and support. 

(Please refer to the back cover for addresses and phone numbers or go to 

our website at www.johnstech.com.) 

TABLE OF CONTENTS 

Standard Product Information .......................................4 

Contactor Component Information ...................................5 

Contactor Identification Information . . . . . . . . . . . . ......................6 

Contactor Configuration Verification .................................7 

Recommended Tools ..............................................8 

Cleaning and Maintenance Frequency ................................9 

Pre-Maintenance Troubleshooting. . . . . . . . . . . . . . ...................10-11 

Load Board & Contactor Inspection .................................12 

Load Board Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 

Contactor Inspection ..............................................12 

Housing, Elastomer & Contact Inspection ............................13 

Housing Inspection ...............................................13 

Elastomer Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 

Contact Inspection ................................................13 

Oxide Buildup ...................................................13 

Contactor Removal & Installation ...................................14 

Contact & Elastomer Removal . . . . . . . . . . . . . . . . . ...................15-16 

Contactor Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-19 

Light Cleaning ...................................................16 

Thorough/Ultrasonic Cleaning . . . . . . . . . . . . . . . . . . .....................18 

Elastomer Installation for ROL Contacts . . . . . . .....................20 

Contact Install for Sense Contacts . . . . . . . . . . . . . .....................21 

Elastomer Installation for Sense Contacts . . . . . . . .....................22 

Contact Install for ROL Contacts . . . . . . . . . . . . . .....................23 

Installation Verification ..........................................24-25 

Grounding Information ..........................................26-27 

Grounding Solutions Information. . . . . . . . . . . . . . . . .....................26 

Ground Insert Removal ............................................26 

Ground Insert Cleaning ............................................26 

Ground Insert Installation ..........................................27

Pad ROL 200KR 

STANDARD PRODUCT INFORMATION 

Mechanical Specifications 

Force Contact 

(non-Kelvin) 

Force + Sense (Kelvin) 

Contact Force: 30 grams 60 grams 

Physical Contact Length: Force 2.63 mm 2.63 mm 

Physical Compressed Height: 1.40 mm 1.40 mm 

Contactor Life 

(# of insertions): 

Elastomers = 300,000 

Force Contacts = 500,000+ (matte tin) 

Force Contacts = 500,000+ (NiPdAu) 

Sense Contacts = 1,000,000 

Housing =2,000,000 

Contact Compliance: 0.20 mm 0.20 mm 

Contact Wipe on Pad: 0.17 mm 0.17 mm 

Contact Tip Coplanarity: 0.05 mm 0.05 mm 

Temperature: -40°C to 155°C 

Housing Material: Torlon ® 5030 

Force Contacts: 

Low-Force XL-2K Fine Tip 

Electrical Specifications 

Force Contact 

(non-Kelvin) 

Force + Sense (Kelvin) 

Electrical Length 2.00 mm 2.00 mm 

Inductance: 

Capacitance: 

Self: 0.47 nH 

Mutual: 0.10 nH 

Ground: 0.16 pF 

Mutual: 0.06 pF 

Self: 3.5 nH 

Mutual: 0.77 nH 

Ground: 0.85 pF 

Mutual: 0.25 pF 

S 21 

Insertion Loss (GSG): -1 dB @ 19.9 GHz -1dB @ 3.0 GHz 

S 11 

Return Loss (GSG): -20 dB @ 7.8 GHz -20dB @ 0.8 GHz 

S 41 

Crosstalk (GSSG): -20 dB @ 34.7 GHz -20dB @ 17.3 GHz 

Average CRES: 

Current Carrying Capability: 

40 mΩ Force 

330 mΩ Sense 

≥ 2.8 A Force* 

Pad ROL 200KR 

CONTACTOR COMPONENTS 

Methodology 

Sense 

Elastomers 

Force 

Elastomers 

Sense 

Contact 

Force 

Contact 

Decoupling 

Components 

Load Board 

Standard Parts 

Johnstech Contactors have five standard parts that comprise the Contactor 

assembly: 

• Housing 

• Contacts 

• Elastomers 

• Acrylic Mounting Plate 

• Alignment Plate or Hold Down Plate 

Contactor Components 

MANUAL ACTUATOR 

Single-Latch Vertically Compliant 

Manual Actuator (SL-VCMA) 

A Manual Actuator is available for shortrun 

testing and characterization and/or 

troubleshooting. 

LEADBACKER 

ALIGNMENT PLATE 

HOUSING - TOP COVER 

Double-Latch Vertically Compliant Manual 

Actuator (DL-VCMA Plus) 

HOUSING - BASE 

Fully-Assembled Contactor 

Alignment Plate 

Acrylic Mounting Plate 

4 



All rights reserved.

Pad ROL 200KR 

CONTACTOR INDENTIFICATION 

Sample Contactor, Load Board Side Up 

8. Device Body 1. Manufacturer 5. Assembly 6. Device 7. Device 

Size (mm) Type Count Type 

4. Design Number 

9. Pitch (mm) 

3. Manufacturing 

Date Code 

10. Part Number 

2. Serial Number 

Identification 

Each Johnstech contactor will have as much information as space allows. The 

identification system is designed to provide you with the technical information 

you need to identify the contactor and its Design Data Sheet (example shown on 

the facing page). 

Here is how to read the different data fields on the Contactors: 

1. JTI- identifies Johnstech International as the manufacturer 

2. Serial Number 

3. Manufacturing Date Code (see tables at right) 

4. Design Number 

For Custom Orders: 

1234-YYZZ, YY = Contactor Technology Code (i.e. 01 = ROL100; 02 = 

ROL200) ZZ = Configuration (or design iteration) Number 

For SelecTest Orders: 

6XXX-8XXXXX, 6XXX = Design Number 8XXXXX = Configuration Number 

5. Assembly Type 

TS: Test Socket 

MA: Manual Actuator 

SL: Single-Latch MA 

DL: Double-Latch MA 

6. Perimeter Pad Count 

7. Package Type 

8. Body Size (mm) 

9. Pad Pitch (mm) 

10. Part Number (will appear only if Contactor is a SelecTest® order) 

Date Code Reference 

Week 

Year 

Letter Number Letter Number 

A 1 A 1991 

B 2 B 1992 

C 3 C 1993 

D 4 D 1994 

E 5 E 1995 

F 6 F 1996 

G 7 G 1997 

H 8 H 1998 

I 9 I 1999 

J 10 J 2000 

K 11 K 2001 

L 12 L 2002 

M 13 M 2003 

N 14 N 2004 

O 15 O 2005 

P 16 P 2006 

Q 17 Q 2007 

R 18 R 2008 

S 19 S 2009 

T 20 T 2010 

U 21 U 2011 

V 22 V 2012 

W 23 W 2013 

X 24 X 2014 

Y 25 Y 2015 

Z 26 Z 2016 

AA 27 

AB 28 

AC 29 

AD 30 

AE 31 

AF 32 

AG 33 

AH 34 

AI 35 

AJ 36 

AK 37 

AL 38 

AM 39 

AN 40 

AO 41 

AP 42 

AQ 43 

AR 44 

AS 45 

AT 46 

AU 47 

AV 48 

AW 49 

AX 50 

AY 51 

AZ 52 

Data Code 

Examples: 

SN123456BV 

B = Week 2 

V = 2012 

SN654321AAT 

AA = Week 27 

T = 2010 

5 




5

Pad ROL 200KR 

Design Data Sheet 

The design data sheet contains 

contactor specifications on load 

board layout, handler plunge 

depth, alignment plate opening 

size and other information 

necessary for setup and 

troubleshooting. Refer to it to 

verify you are using the correct: 

• Alignment Plate (for 

manual vs. automated 

testing and opening-tobody) 

• Contacts (refer to part 

number and thickness) 

• Elastomer Configuration 

• Load Board Layout 

CONTACTOR CONFIGURATION VERIFICATION 

Verify the Alignment Plate 

Alignment Plate Verification 

Refer to the design data sheet 

to ensure the proper alignment 

plate is being used. Different 

package 

vendors and handlers require 

different alignment plates. The 

design data dheet will specify 

which one is right for which 

application, as well as any 

special engraving to assist with 

identification. 

Alignment Plate Part Number 

only. Check this number 

against the Part Number on 

the Design Data Sheet to 

ensure it is the correct one. 

Example of Design Data Sheet 

Alignment Plate for same 

Housing, but with a differentsized 

opening; and that opening 

size information. 

6 




Pad ROL 200KR 

RECOMMENDED TOOLS 

For installing and maintaining Johnstech Contactors: 

• Screwdriver with Allen-Head Bits for fastening the contactor to the load board. 

• 10X Eye Loupe for magnified inspection of contactor, elastomers and contacts. 

• Elastomer Tool for use in elastomer installation as well as prying alignment plate from contactor. 

• Fine-Tip Non-Metallic Tweezers for handling contacts and elastomers. 

• Scalpel for marking elastomer lengths. 

• Micro Scissors for cutting elastomers to length. 

• Probe Tool for use in elastomer Installation. 

• Fiberglass Brush and Replacement Tips recommended for cleaning the contacts (If 

fiberglass brushes are not allowed on the test floor, although not optimum, nylon brushes can be 

substituted.) 

Extras: 

• Finger Cots recommended to prevent contaminating contactor components with skin oils. 

• Protective Eye wear recommended to protect technicians from test floor/contactor components, 

compressed air and other chemicals. 

CAUTION: Avoid touching the device and load board interface surfaces of the 

contacts with metal tools. Scratches on these areas may degrade performance. 

Recommended Tools (in order 

at right) 

Johnstech’s Maintenance & Inspection Kit 

Johnstech’s Maintenance & Inspection Kit contains many of the tools needed 

for maintenance and inspection and are designed especially for Johnstech High 

Performance Contactors. Contact your Johnstech Representative for more 

information. 

Maintenance Kit Part Numbers: 

• with torque screwdriver: 706449 

• without torque screwdriver: 706448 




7

Pad ROL 200KR 

CLEANING & MAINTENANCE FREQUENCY 

Determining Frequency 

Due to a wide range of variables (like those listed below), each test floor must 

determine their optimal cleaning and maintenance intervals through effective use 

of statistical process control. By carefully monitoring and recording yield rates 

and following good test floor troubleshooting procedures, you will be able to 

clearly differentiate between interface vs. maintenance problems and an effective 

maintenance cleaning cycle can be established to match the needs of each 

test floor. Contact your Johnstech Representative or Field Service for further 

information or help. 

Handler Design and Setup 

Handlers have a variety of test plane configurations, device transportation 

methods, plunge mechanisms and accessories. Each handler has its own unique 

attributes. Handler set-ups that are not optimized can increase the required 

maintenance frequency by contributing to premature contactor and elastomer wear 

and oxide build-up on the contacts. By working with Johnstech and your handler 

supplier, you can optimize handler performance to minimize downtime. 

Correct Contact Compressed Height 

Incorrect contact compressed height reduces the effectiveness of the contact’s selfcleaning 

wipe and may cause increased oxide build-up and/or decreased contact life 

and load board pad life. It may also adversely affect elastomer life by creating tears, 

cuts or compression set (permanent deformation). See examples on Page 13. The 

contact compressed height for each contactor is specified on the design data sheet. 

Package and Device Plating Variations 

Variations in packages can affect your maintenance schedule. Different package 

vendors, or even different device lots, may have varying amounts of mold flash that 

can increase wear on the contactor and alter device placement. Also, the method 

used for plating the device can vary the rate of debris build-up, therefore varying 

the maintenance interval. 

Contaminants 

Accumulation of contaminants (such as oxides and mold flash) will contribute to 

continuity failures during the test process. 

General Test Floor Maintenance Activities 

The frequency of handler maintenance procedures also affects contactor cleaning. 

For example, how often the handler and handler test areas are blown free of debris 

impacts the effectiveness of the contactor. Contactors exposed to increased levels 

of foreign debris are likely to require more frequent maintenance and cleaning. 

8 




Pad ROL 200KR 

PRE-MAINTENANCE TROUBLESHOOTING 

This Pre-Maintenance Troubleshooting section is to help you determine which 

part of your Johnstech contactor may be inspected and/or serviced to address a 

particular test problem. This section doesn’t cover test floor, handler, device or any 

other variables that may be contributing to your test problem. If you still experience 

problems after following the Maintenance Instructions herein, contact your local 

Johnstech Representative or fill-out our online Tech Help Form at www.johnstechhelp. 

com/support. 

Experiencing Yield Fall-Off 

There are many reasons you may be experiencing yield fall-off but it can frequently 

be attributed to either parametric or continuity failures. 

Parametric failures are typically due to increased contact resistance which 

can be caused by: 

• Dirty Contacts: Inspect contacts per instructions on Page 13. 

• Worn or Damaged Elastomers: Inspect elastomers per instructions on Page 13. 

• Device-Pad-to-Contact Alignment: Inspect the contactor registration per instructions on Page 12. 

• Worn or Damaged Alignment Plate: Inspect the alignment plate under Contactor Inspection 

instructions on Page 12. 

• Worn or Damaged Leadbacker/Nest: Inspect the leadbacker and nest. 

• Oxidation/Contamination of the Load Board: Inspect the load board per instructions on Page 

12. 

• Excessive Load Board Pad Wear: Inspect the load board per instructions on Page 12. 

Continuity failures are typically due to open/short failures which can be 

caused by: 

• Excessive Loose Debris: Inspect contactor per instructions on Page 12. 

• Worn or Damaged Contacts: Inspect contacts per instructions on Page 13. 


• Worn or Damaged Alignment Plate: Inspect the alignment plate under contactor inspection 

instructions on Page 12. 


• Contamination of the Load Board: Inspect the load board per instructions on Page 12. 

If experiencing problems in 

automated test, first answer 

these 2 questions. 

1) Does the test socket work 

when manually testing with the 

Manual Actuator 

2) Do the witness marks from 

the Manual Actuator test look 

the same as those from the 

automated test 

If the answer to both questions 

is YES, then your test problem 

is probably caused by some 

variable other than your 

Johnstech Contactor. 

If the answer to either question 

is NO, then read through the 

checklists on these 2 pages, 

under the problem (in red) that 

you are experiencing. 

If this application has run well 

previously but is now failing, 

the troubleshooting must 

determine what has changed. 

If this is a new application 

troubleshooting must examine 

the original design. 




9

Pad ROL 200KR 

PRE-MAINTENANCE TROUBLESHOOTING 

Experiencing Device Damage or Jamming 

There can be many reasons why you experience device damage or jamming. For 

example, incorrectly designed or incompatible, worn or damaged handler/contactor 

components may cause pad damage or device jamming. 

Device pad damage or improper wipe can happen when contacts are out of 

alignment. Witness marks will be off-center on the device pads, which can 

occur due to: 

• Worn or Damaged Alignment Plate Opening: Inspect the alignment plate under contactor 

Inspection Instructions on Page 12. 


• Changes in Package Singulation: Verify that the alignment plate and leadbacker are correct for 

the device by comparing device dimensions to the design data sheet on Page 7. 

• Improper Overtravel Control: Verify that leadbacker/nest has proper overtravel control. Refer 

to the contactor specifications on your design data sheet for compressed, uncompressed and 

overtravel stop measurements. 

• Worn or Damaged Housing Slots: Inspect housing per instructions on Page 13. 

Device pad damage or improper wipe can also occur when devices 

experience over deflection, whereby large witness marks appear. This can be 

attributed to: 

• Worn or Damaged Contacts: Inspect contacts per instructions on Page 13. 


• Improper Elastomers or Elastomer Installation: Verify that elastomers are correct per your 

design data sheet and make sure Installation was performed per instructions on Page 20. 


• Improper Overtravel Control: Verify that leadbacker/nest has proper overtravel control. Refer 

to the Contactor Specifications on your design data sheet for compressed, uncompressed and 

overtravel stop measurements. 

• Worn or Damaged Housing Tail Stop: Inspect the contactor per instructions on Page 12. 

Device Jams can occur due to: 

• Device-Pad-to-Contact Alignment: Inspect the contactor registration per instructions on Page 12. 

• Worn or Damaged Alignment Plate Opening: Inspect the alignment plate opening under 

Contactor Inspection instructions on Page 12. 


• Changes in Package Singulation: Verify that the alignment plate and leadbacker are correct for 

the device by comparing device dimensions to the design data sheet. 

• Improper Overtravel Control: Verify that leadbacker/nest has proper overtravel control. Refer to 

the Contactor Specifications on your design data sheet for compressed, uncompressed and overtravel 

stop measurements. 

10 




Pad ROL 200KR 

LOAD BOARD & CONTACTOR INSPECTION 

Load Board Inspection 

Johnstech recommends performing a thorough inspection of the load board before 

initial installation of the contactor, as well as when performing routine maintenance. 

First, however, verify your load board against the load board drawing that was sent 

to you either with your quote or order. 

Next, check the contact land pad pattern for signs of wear on the gold (see Figure 

1). If Nickel is showing, make sure that it is not excessive. It is acceptable to 

utilize the nickel surface during testing; however, in some RF applications, signal 

degradation will occur. Load Boards with wear that extends deeper than the nickel 

surface, through to the copper, can cause damage to the contacts and elastomers 

and should be replaced or repaired. 

Figure 1: Example of a load 

board pattern. 

NOTE: Excessive load board wear is typically caused by contact deflection or 

excessive force on the socket housing. 

Contactor Inspection 

CAUTION: Use special care during the inspection process. Excessive force can 

fracture the housing slots. 

Before removing contactor from the load board, use a minimum of 10X magnification 

to inspect it for: 

• Damaged, missing or excessively worn contacts 

• Debris and mold flash trapped around contacts 

• Cracks or chipping in the housing or alignment plate 

• Cracked, deformed or missing contact slot walls 

• Worn alignment plate (ALPL) walls (see Figure 2). 

Figure 2: Example of worn (vs. 

not worn on right) alignment 

plate wall. 

Complete alignment plate analysis is a more complex topic than can be fully 

addressed here, but the following quick check-up may be helpful. 

NOTE: Remove contactor from load board (per instructions on Pages 14) to test 

for alignment plate wear. On a backlit surface, place device into the alignment 

plate opening and then push it to one corner (see Figure 3). 

Figure 3: Example of backlit 

alignment plate wear test. 

Use a feeler gauge stock of 0.1mm, to check the gaps on the opposite sides. 

If feeler gauge stock slips in and out of gap easily, the alignment plate may 

need to be replaced. Worn handler alignment pin holes (contact your Johnstech 

Representative for bushings to reduce contactor wear.) 

If any of the above conditions are observed, contactor maintenance and possibly 

contact/elastomer or alignment plate replacement is required. 

Figure 4: Examples of tail stop 

wall wear. 




11

Pad ROL 200KR 

HOUSING, ELASTOMER & CONTACT INSPECTION 

Housing Inspection 

In order to inspect the housing, elastomers and contacts, the contactor must be 

removed from load board and disassembled. Refer to instructions on Pages 14- 

15. 

Figure 5: Acceptable contact 

wipe on pad (Matte Tin). 

Figure 6: Example of cut 

elastomer; replace. 

Pad ROL 200KR Kelvin-Ready Contactor housings have a recommended lifespan 

of 2,000,000 million insertions. Take the dismounted/disassembled contactor and 

using a minimum of 10X magnification, inspect the housing for signs of tail stop 

wear. If the tail stop depth exceeds 0.05mm (see Figure 4), replace housing. 

Conversely, if the contact wipe on the device pad is not placed correctly (see 

Figure 5), check the alignment plate and tail stop wall for wear. If observed, 

replace the alignment plate. 

Elastomer Inspection 

Using 10X+ magnification, inspect elastomers for signs of: 

• Cuts or tears 

• Compression set 

• Stretched sections 

Pad ROL 200KR Kelvin-Ready Elastomers should last to 300,000 insertions, 

but there are many factors that affect elastomer life. Upon inspection, if you 

see excessively cut or torn elastomers (see Figure 6), or if the compression 

set exceeds 0.05mm (see Figure 7), replace elastomers to regain optimum 

performance. 

Figure 7: Example of 

compression set; replace. 

Contact Inspection/Sense Contact Inspection 

Using 10X+ magnification, inspect contacts for signs of: 

• Worn Tips (see Figure 8) 

• Scratches or Markings 

• Oxide Buildup (see Figure 9) 

• Debris Buildup 

• Compressed/Distorted Shape 

Using 10X+ magnification, inspect sense contacts for signs of compressed/ 

distorted shape at the tips (see Figure 10). 

Figure 8: Worn tips of contacts. 

observe worn tip for contact on 

the right. 

If any of the conditions listed above are observed, discard used contacts and 

replace with new ones. Also, for optimum performance, if you know the contacts 

have run their recommended lifespan, or you can see that wear exceeds 0.10mm, 

replace with new contacts. 

Figure 9: Example of oxide build 

up on contact tip (photo is from a 

test on Matte Tin). 

Debris Buildup 

The self-cleaning wipe-action of ROL Technology is designed to greatly reduce 

the amount of debris buildup on contacts. However, some debris buildup will 

occur if contactors are unused for 2 or more days, appearing dull gray in color (see 

Figure 9). A light brushing or a few device insertions will typically remove the debris 

barrier and expose a shiny surface. Clean the contactor after prolonged downtime 

or if you experience a decrease in yields. Refer to cleaning procedures on Pages 

16-17. 

NOTE: If contacts have significant/excessive debris build-up, check all 

components in the test cell to ensure that device alignment and plunge depth are 

correct. 

Figure 10: Bent tine of sense 

contact. 

12 




Pad ROL 200KR 

CONTACTOR REMOVAL AND INSTALLATION 

Contactor Removal & Installation Instructions 

It is recommended that you remove your Pad ROL 200KR Kelvin-Ready Series 

Contactor from the load board before performing any component inspection, 

cleaning and/or maintenance. 

Step 1: Remove Contactor 

Start removal of the contactor from the load board by loosening the fasteners. Use 

a microscope, to watch for contacts or ground Insert sticking to the mounting surface 

while carefully lifting contactor from load board. If either is sticking, apply several 

drops of Isopropyl Alcohol through contact slots and allow it to soak for two minutes. 

Once free, inspect it for any loose or missing contacts. Mount the contactor to the 

acrylic shipping plate (shown on Page 5). 

Step 2: Perform Maintenance & Cleaning 

Perform the maintenance and cleaning per the instructions contained on the 

following pages. 

Step 3: Clean Load Board 

Before remounting the contactor to the load board, ensure that no debris is present 

in the interface area. If necessary, use compressed air and/or Isopropyl Alcohol 

with a clean lint-free cloth to carefully wipe the bottom of the contactor and the 

surface of the load board clean. 

Figure 10: Screw tightening 

pattern. 

Recommended 

Torque Values 

in.-lb. Nm 

0-80 1.0 0.11 

2-56 2.0 0.23 

4-40 5.0 0.56 

M1.4 x 0.3 0.4 0.04 

M1.6 x 0.35 0.6 0.06 

M2 x 0.40 1.3 0.15 

M2.5 x 0.45 2.5 0.28 

M3 x 0.5 4.5 0.51 

M4 x 0.7 8.0 0.90 

NOTE: NEVER use Acetone or other solvents. 

Step 4: Install Contactor 

Refer to the load board drawing that was sent with either your quote or order for 

proper footprint layout. Fasten the contactor to the load board by fitting the screws 

through the contactor assembly and engaging several threads. Under a microscope 

or 10X eye loupe, inspect the contact tips for alignment. Misaligned contacts can 

damage the alignment plate, housing and load board. Use the elastomer tool to 

realign the contacts where necessary. Evenly tighten the fasteners in a crisscross 

pattern (see Figure 10). To avoid damage to the contactor or threaded inserts in the 

load board, the contactor mounting screws should be tightened, according to the 

Recommended Torque Values in the table at left. 

Step 5: Verify Contacts 

Verify that all contacts are properly positioned. Gently actuate all of the contacts with 

an elastomer tool to ensure proper contact motion. 

Step 6: Verify Test Set-up 

Verify the device-to-contactor alignment and handler plunge depth, as well as the 

X-Y presentation. 




13

Pad ROL 200KR 

SENSE CONTACT & ELATOMER REMOVAL 

INSTRUCTION 

CAUTION: Avoid putting pressure on slot walls and webs by not resting 

hands or tools in these areas while working on the contactor. 

Step 1: Remove Alignment Plate 

• See Step 2 on Page 17. 

Figure 11: Remove top housing 

cover plate. 

Step 2: Remove Top Housing Cover Plate 

• See Figure 11. 

Step 3: Remove Sense Contact Elastomers 

• Flip the top housing cover plate top side down and grasp one end of the green elastomer with 

tweezers (see Figure 11). 

• Lift and peel the elastomer out of the groove from one end to the other (see Figure 12). 

Figure 12: Remove top housing 

cover plate elastomer. 

Figure 13: Top view. Removing 

retention elastomer of sense 

contacts. 

Step 4: Remove Sense Contact Retention Elastomer 

• From the top side of the contactor use the tweezers to pull out the blue retention elastomer from all 

four sides of the contactor (see Figure 13). 

• Inspect elastomers per instructions on Page 13 to determine whether elastomers can be reused or 

need to be discarded. 

Step 5: Remove Sense Contacts 

• From the top side of the contactor use tweezers to slide the sense contact to the back of the 

retention elastomer slot (see Figure 14). 

• Grab the sense contact rear with the tweezers and lift up, rotate the contact tips up during removal 

(see Figure 14). 

• If your intent is just to change out the elastomers and reuse the contacts, take extra care in the 

removal process. Do not squeeze or bend them and do not touch the tips. Damaged tips can affect 

performance. 

• Either discard worn contacts or set aside for reassembly. 

NOTE: 25mm x 25mm housing designs are one-piece. Install the green retention 

elastomer in the alignment plate. 

Tweezers 

Sense Contact 

Figure 14: Remove sense 

contact. 

Retention 

Elastomer 

Slot 

14 




Pad ROL 200KR 

FORCE (ROL) CONTACT & ELASTOMER REMOVAL 

INSTRUCTIONS 

CAUTION: Avoid putting pressure on slot walls and webs by not resting hands or 

tools in these areas while working on the contactor. 

Step 1: Remove Inner/Front Force (ROL ) Contact Elastomers 

• Turn contactor over so load board side faces up. 

• Use tweezers to pull out the inner/front (blue) elastomer from all four sides of the contactor (see 

Figure 15). 

• Inspect elastomers per instructions on Page 13 to determine whether elastomers can be reused or 

need to be discarded. 

Step 2: Remove Force (ROL ) Contacts 

• With contactor still load board side up, use tweezers to carefully pull Force (ROL ) contacts out of 

housing (see Figure 16). 

• Many people find it easier to start at one corner and work your way around the contactor but 

removal order is unimportant. 

• Inspect contacts to determine if they need to be discarded or can be reused. Refer to Page 13 for 

help. 

• If your intent is just to change out the elastomers and reuse the contacts, take extra care in the 

removal process. Do not squeeze or bend them and do not touch the tips. Damaged tips can affect 

performance. 

• Either discard worn contacts or set aside for reassembly. 

Figure 15: Removal of inner/front 

elastomer. 

Figure 16: Contact removal. 

Step 3: Remove Outer/Back Force (ROL ) Contact Elastomers 

• Like in Step 1 above, use tweezers to pull out the outer or back elastomers (see Figure 17). 

• Inspect for signs of wear per instructions on Page 13 and either set aside for 

reinstallation or discard. 

NOTE: It is recommended to just discard used elastomers and assemble contactor 

with new ones, but if they are in exceptionally good shape, they can be set aside 

and reinstalled. Blow with compressed air before reinstalling. Dip the elastomers in 

Isopropyl Alcohol to clean. 

Figure 17: Pull out outer/back 

elastomer 




15

Pad ROL 200KR 

CONTACTOR CLEANING 

Light Cleaning Procedure 

If debris buildup is observable upon inspection of the contactor or you experience a 

drop in yields or an increase in resistance, follow the Light Cleaning Procedure on 

this page. 

Figure 18: Separating housing 

and alignment plate. 

NOTE: A Fiberglass brush is best for contactor cleaning but if you don’t have 

or are not allowed to use a fiberglass brush, a nylon brush may be used as a 

substitute. 

Step 1: Remove Contactor from Load Board 

• Refer to instructions on Page 14, Step 1. 

Step 2: Remove Alignment Plate 

• Use a scalpel to gently pry apart the housing and alignment plate, working in an even and 

incremental manner around the housing to avoid binding (see Figure 18). 

Figure 19: Top view. Correct 

direction for contact brushing on 

the top side of the contactor. 

Step 3: Brush the Top Side of Contactor 

• Mount contactor to the acrylic mounting plate. 

• Use a fiberglass (or nylon) brush to gently clean the perimeter force and sense contact tips and 

ground (even if in a ground insert) contact tips. Always brush from the outside in, towards the 

center of the contactor (see Figure 19). 

CAUTION: When brushing a bank of sense contacts, be careful not to brush into 

another bank of contacts at the same time, as this may damage the sense contact 

tips. Brush under a microscope. 

• If needed, wet the fiberglass brush with Isopropyl alcohol to aid in debris removal. 

Figure 20: Bottom view. Correct 

direction for contact brushing on 

the sense contacts. 

Step 4: Brush the Bottom Side of Contactor 

• Remove contactor from the acrylic mounting plate and turn over so the load board side is up. 

• Use the fiberglass (or nylon) brush again to gently clean the perimeter force and sense contact 

bottoms from the center of the contactor outward (see Figure 20). Avoid brushing the elastomers 

Step 5: Clear Debris 

Remove any loose debris from the contactor using one or both of these methods: 

• A small vacuum. 

• Dry, clean compressed air (20psi or less) (see Figure 21). 

Be sure to thoroughly clear debris from every part of the contactor, including the 

elastomer and contact slots. If no loose debris remains, the contactor may be 

reassembled and reinstalled. 

NOTE: If remaining debris or foreign matter is observed, even after performing this 

light cleaning procedure, try the thorough cleaning procedure on the next page. 

Figure 21: Compressed air 

cleaning. 

Step 6: Clean Handler 

• Clean the handler per the manufacturer’s recommendations. 

Step 7: Reinstall Contactor 

• If no loose debris remains on the contactor, remount it to the load board per the instructions on 

Page 14, Step 4. 

NOTE: Before reassembling the alignment plate to the housing, make sure the 

sense contacts are laying flat in the housing grooves. See picture at the bottom left 

of Page 22. 

16 




Pad ROL 200KR 


Thorough Cleaning Procedure 

If the contactor and alignment plate have excessive debris buildup, it is strongly 

recommended to perform a thorough cleaning with an ultrasonic cleaner. Only 

execute this procedure in a well ventilated area with an exhaust hood. 

CAUTION: The ultrasonic cleaner should have a maximum power of 500W and a 

catch basket in the tank that prevents the contactor from touching settled debris. 

Step 1: Prepare the Housing 

• Remove the contactor from the load board per instructions on Page 14, Step 1. 

• Gently pry apart the housing and alignment plate per instructions in Step 2 on Page 17. 

• Remove ground insert if contactor has one, Refer to Ground Insert Removal Instructions on Page 

27. 

• If contacts and elastomers require replacement for either the housing or ground insert, removed 

the used contacts and elastomers. 

• If the contacts and elastomers are in good condition they can be left in the housing during the 

following cleaning procedures. 

Figure 22A: Example of cleaning 

a housing in an ultrasonic 

cleaner; with a beaker to contain 

the odor from distilled white 

vinegar. 

Step 2: Prepare the Bath 

• Prepare a bath of diluted Isopropyl Alcohol (70/30 Alcohol/Water) OR a heated (40-50ºC max) 

mild acidic/distilled white vinegar (7.1 > ph > 3.0) solution. 

NOTE: If a sonic cleaner is unavailable, gently brush the housing with bath solution 

(see above), rinse in deionized water and dry out housing completely. 

Figure 22B: Example of cleaning 

a housing in an ultrasonic 

cleaner; note left position. 

NOTE: The mild acidic/distilled white vinegar may have a strong odor. To contain 

the odor we recommend using a beaker cover (see Figure 22A). 

Step 3: Perform the Cleaning 

• Operate ultrasonic cleaner per manufacturer’s instructions only. 

• Fully immerse the populated or unpopulated housing device-side down. The bath should be preheated 

and run for a minimum of a 30 minute cycle (see Figure 22B). 

• Also, place the alignment plate and the ground insert into the bath. 

• Remove housing, alignment plate and ground insert from the bath/sonic rinse and rinse with 

deionized water for about 10 minutes (see Figure 23). 

NOTE: For populated contactor housings or populated ground inserts, inspect 

for missing contacts before moving them to the rinse bath. Some contacts may 

dislodge during the ultrasonic cleaning. Collect them and move them to the rinse 

bath and then reinstall before drying. 

Figure 23: Example of rinsing a 

housing in an ultrasonic cleaner; 

note right position. 




17

Pad ROL 200KR 


Step 4: Dry the Contactor 

Current leakage may occur during testing if moisture remains on the contacts. To 

prevent this: 

• Carefully pat the contactor dry with a lint-free cloth. 

• Blow the contactor dry with heated air (see Figure 24). 

• If necessary, place in oven for approx. 10 minutes. 

Figure 24: Heated air drying, a 

common hair dryer will suffice. 

CAUTION: DO NOT use heat guns to blow contactors dry. Heated air should not 

exceed 100ºC or be utilized for longer than 30 minutes. 

Step 5: Reassemble the Contactor 

• Reassemble the contactor per instructions on Pages 18-19. 

Step 6: Reinstall Contactor 

• Inspect contactor one final time for any debris, damage or moisture. 

• Remount contactor to load board per instructions on Page 14, Step 4. 

18 




Pad ROL 200KR 

ELASTOMER INSTALLATION 

Elastomer Installation Instructions for Force Contacts of Kelvin- 

Ready Contactor 

Before beginning, use low-pressure, clean compressed air on Contactor to blow away 

any debris. 

Step 1: Cut Elastomers to Length 

• Turn contactor load board side up. 

• Lay a length of the red elastomer next to the outer or back elastomer slot. 

• Use a blade to mark the elastomer at the correct length (see Figure 25), which is just a little short 

of the end well (see Figure 26). Use care to not cut the housing. 

• Use micro-scissors to cut elastomer straight across. 

• Cut remaining 3 lengths of the outer/back (red) elastomers to this same size. 

• Proceed on to cut the 4 inner/front elastomers (blue) to this same length. 

• Store unused elastomer in original packaging only. 

Step 2: Install Outer/Back Elastomers 

• Place a red elastomer over the outer/back elastomer slot. 

• Using an elastomer tool, gently push elastomer into slot (see Figure 27). 

• Elastomer should extend just slightly less than the end of the end well. 

• Continue installing remaining (red) outer elastomers. 

Step 3: Install Inner/Front Elastomers 

• Place elastomer (blue) over the inner or front elastomer slot. 

• Position tweezers over the contact rib in the middle of the elastomer slot, then gently squeeze 

the elastomer and tuck it into the elastomer slot (see Figure 28). Continue working towards the 

right, “pinching and tucking” at each rib in sequence (see Figure 28). Use a delicate touch when 

squeezing elastomer to avoid nicks and cuts. 

• Once the right side is completed, go back to the center and work toward the left. Finish by pushing 

elastomer ends into end wells. Check to make sure elastomer just barely extends into the end 

wells (see Figure 29). 

• If the elastomer appears off-center, please pull it out and reinstall. Optimum performance is 

achieved when elastomers are centered in the elastomer slot. 

NOTE: Lubricate elastomers with Isopropyl Alcohol, if needed, to facilitate 

installation. Please use special care to avoid bunching, stretching or twisting the 

elastomer. Proper elastomer installation helps optimize performance. 

Figure 25: Mark elastomer at 

appropriate length. 

Figure 26: Proper fit of 

elastomers into end wells. 

Figure 27: Use elastomer tool to 

push elastomer into outer slot. 

• Continue installing the remaining inner elastomers. 

• Please note that they will fit more snugly into the inner elastomer slots than how it was for the outer 

elastomers. 

Figure 28: Use tweezers 

to gently “pinch and tuck” 

elastomer into inner elastomer 

slot. 

Figure 29: Work from center to 

right and then center to left. 




19

Pad ROL 200KR 

Tips 

CONTACT INSTALLATION 

Contact Installation Instructions For Sense Contacts 

NOTE: Sense contacts must be installed before installing the sense elastomers. 

Figure 30: Top view. Grab 

contact at rear tail bend and 

rotate tip about 45 degrees. 

Sense Elastomer 

Retention Slot 

Step 1: Align and Insert Contact 

• Turn contactor device side up. 

• Use tweezers to grab the contact at the rear tail bend. 

• Rotate the contact tips up about 45 degrees (see Figure 30). 

• Start installation at the far left contact groove on any side. Align the contact above the contact 

groove and insert contact tail into the sense elastomer retention slot and into the tail guide slot (see 

Figure 30 & 31). 

• Rotate the contact tips back down so that the contact lays flat in the groove (see Figure 31). 

Step 2: Position Contact and Insert Further 

• Use the tweezers to slide the contact towards the center of the contactor until the contact tail 

touches the tail stop (see Figure 31 & 32). 

Tail Guide 

Slot 

Figure 31: Use tweezers to drop 

contact into place. 

Tail Stop 

Figure 32: Fully assembled 

sense contact. 

20 




Pad ROL 200KR 

ELASTOMER INSTALLATION 

Elastomer Installation Instructions for Sense Contacts of Kelvin- 

Ready Contactor 

Before beginning, use low-pressure, clean compressed air on contactor to blow away 

any debris. 

Step 1: Cut Retention Elastomers to Length 

• From the top side of the contactor, lay a length of blue elastomer next to the sense contact retention 

slot. 

• Use a blade to mark the elastomer at the correct length, which is slightly short of the slot ends. Use 

care not to cut the housing (see Figure 33). 

• Use micro scissors to cut the elastomer straight across. 

• Cut the remaining 3 lengths of retention slot elastomers to this same size. 


Step 2: Install Blue Retention Elastomers 

• Place the blue elastomer over the Kelvin Contact retention slot. 

• Using an elastomer tool, push the elastomer fully into the slot (see Figure 34). 

Continue installing remaining retention elastomers. 

Sense Contact Retention Slot 

Figure 33: Top view. Cut blue 

elastomer to length. 

Figure 34: Use elastomer tool to 

push elastomer into slot. 

Step 3: Cut Cover/Alignment Plate Elastomers 

• With cover plate removed, turn cover plate top side down. 

• Lay a length of green elastomer next to the alignment plate elastomer slot. 

• Use a blade to mark the elastomer at the correct length, which is slightly short of the pocket ends. 

Use care not to cut the alignment plate (see Figure 35). 

• Use micro scissors to cut the elastomer straight across. 

• Cut the remaining 3 lengths of alignment plate elastomers to this same size. 


Step 3: Install Alignment Plate/Cover Elastomers 

• Tuck one end of the elastomer into one of the groove pockets (see Figure 36). 

• Proceed to tuck the length of the elastomer into the groove (see Figure 38) and tuck the opposite 

end into the remaining groove pocket. 

• Continue installing the remaining alignment plate/cover elastomers. 

Figure 35: Cut elastomer straight 

across. 

Figure 36: Bottom view. Lay a 

length of red elastomer next to 

the alignment plate and place 

in slot. 

Figure 37: Fully installed sense 

contacts and blue retention slot 

elastomers. 

Figure 38: Bottom view. Fully 

installed alignment plate/cover 

elastomers. 




21

Pad ROL 200KR 

CONTACT INSTALLATION 

Contact Installation Instructions For Force (ROL ) Contacts 

CAUTION: Avoid putting pressure on slot walls and webs by not resting hands or 

tools in these areas while working on the contactor. 

Figure 37: Align above and 

between elastomers. 

Step 1: Align and Insert Contact 

• Turn contactor load board side up. 

• Using tweezers, dip contact in Isopropyl Alcohol. (The alcohol lubricates the contact, making 

insertion easier.) 

• Start installation at the far left contact slot on any side. 

Align the contact above the contact slot (see Figure 37) and press the contact down between the 

gap in the elastomers (see Figure 38). 

Step 2: Position Contact and Insert Further 

• Maneuver the head of the contact down and towards the center of the contactor (see Figure 39). 

Step 3: Final Adjustment 

• Use tweezers to gently rotate the contact tail down onto the outer (Red) elastomer until the fit is 

snug (see Figure 40). 

Figure 38: Insert downward into 

gap between elastomers. 

Step 4: Installation Pattern 

• Continue installing contacts in the repeating left-right-center sequence shown below, per the steps 

above, until entire side is populated. Proceed on to each side in the same manner. 

Figure 39: Gently push contact 

head towards center of contactor. 

1 4 6 3 5 2 

Contact Insertion Order 

NOTE: It is recommended to mount the contactor onto the acrylic mounting 

late as shown on Page 5 when not in use or for inspecting, storing or 

shipping. If the contactor is stored on acrylic mounting plate for over a week, 

loosen screws to avoid compression set on the rear elastomer. 

Figure 40: Gently push contact 

tail down onto red elastomer. 

22 




Pad ROL 200KR 

INSTALLATION VERIFICATION 

In order to ensure optimum performance from your Pad ROL 200KR Kelvin-Ready 

Contactor, it is very important to check and make sure that the contacts and 

elastomers are properly installed. 

Turn your contactor load board and follow these steps to make sure the contacts 

and elastomers of your Pad ROL 200KR Kelvin-Ready Contactor are installed 

correctly. 

Step 1: With Cover Plate and Alignment Plate installed and the Contactor 

fastened to the load board, check Sense and Force (ROL ) Contacts 

• Verify that the sense contacts and Force (ROL ) contacts do not touch. 

• The sense contact tips should sit at or below the top of the Force (ROL ) Contact tip. 

NOTE: The contacts may need to be actuated by a device to properly seat all 

contacts. 

Sense Contact 

Notice the open 

space between 

Sense and Force 

(ROL ) Contact. Force (ROL ) 

Contact 




23

Pad ROL 200KR 

INSTALLATION VERIFICATION 

Step 2: Check the Force (ROL ) Contact Elastomers 

Make sure the Force (ROL ) Contact Elastomers are: 

• At least halfway into the end wells. 

• Not stretched, bunched or twisted. 

Sense Contacts 

Step 3: Verify Sense Contacts 

• Verify that the sense contact tails are aligned with the recessed grooves on load board side of 

housing (see picture above). 

NOTE: The sense contact tails should be sticking out a bit from the housing (see 

picture on left). They should also all be at the same height above the housing floor 

to assure there is equal force on each load board pad. 

24 




Pad ROL 200KR 

GROUNDING SOLUTIONS 

The Pad ROL 200KR Kelvin-Ready offers four main Grounding Options: 

RCI: ROL Contacts in a Copper Insert, for 5x5-12x12 packages. 

• New Elastomer retention design (see Figure 41). 

CI: Copper Insert for 3x3 packages (see Figure 42). 

EI: Eco -1 Insert for 3x3 & 4x4 packages (see Figure 43). 

• See the EI Insert Owners Manual, Lit 1413A. 

Figure 41: RCI ground insert 

(New elastomer retention 

design). 

RTH: ROL Contacts in Torlon Housing, for 4x4-12x12 packages (refer to Page 

21). 

In order to maintain proper operation and ensure a long life for your grounding 

solution, you will need to perform cleaning and maintenance, much like you need to 

do for the other components of your Pad ROL 200KR Kelvin-Ready Contactor. 

Ground Inserts 

RCI, CI and EI ground inserts need to be removed for cleaning and maintenance per 

the instructions on Page 26. Then follow the Cleaning & Installation instructions on 

Page 26. 

Figure 42: CI ground insert. 

Ground Contact Maintenance 

Inspection, cleaning and change-out of the ground contacts & elastomers can 

be performed in the same manner as the perimeter contacts and elastomers. 

(However, please note that depending on which way the ground contacts are 

oriented, the direction of brushing when performing the Light Cleaning Procedure 

will vary.) 

NOTE: Examples shown are non-Kelvin configurations. Refer to standard Pad 

ROL200 M&I Guide for the latest elastomer configurations. 

Figure 43: EI ground insert. 




25

Pad ROL 200KR 

GROUND INSERT MAINTENANCE 

Ground Insert Removal Instructions 

IMPORTANT: Use finger cots when handling ground inserts to avoid 

contamination with skin oils, which can degrade performance. 

Figure 44: A light downward 

push will free ground insert from 

housing. 

Using covered fingers and/or the elastomer tool, press down on the ground Insert. 

The insert will easily release out of the housing (see Figure 44). 

Ground Insert Cleaning Instructions 

Step 1: Remove Contacts & Elastomers 

• Once the ground insert is removed from the housing, follow instructions for contact and elastomer 

removal on Page 15. 

Step 2: Clean Ground Insert 

• Clean the unpopulated ground insert with a fiberglass (or nylon) brush per the instructions on 

Page 16. 

• Follow up with ultrasonic cleaning, per instructions on Page 17. 

• Inspect for mushrooming or bending. If observed, contact Johnstech Field Service or your 

Representative. 

Step 3: Re-assemble Ground Insert 

• Follow the instructions for elastomer & contact installation on Pages 19 & 20. 

Step 4: Blow with Compressed Air 

• To clear away any remaining debris, blow the insert with compressed air before reinstalling ground 

insert. Inspect for remaining debris. If observed, repeat cleaning process again as seen on Page 

17. 

26 




Pad ROL 200KR 

GROUND INSERT INSTALLATION 

New Elastomer Retention Ground Insert Design 

IMPORTANT: Always ensure ground insert is clean before installing and inspect 

used inserts for damage or wear. 

Elastomer 

retention 

grooves 

Ledges 

Step 1: Locate and Position the Ground Insert 

• Under magnification locate your ground Insert and flip the insert right side up and lay on a flat 

surface. 

Step 2: Installation of the Ground Insert 

• With the housing right side up, place the housing over the insert to begin the installation. 

• Locate the two grooves on the insert (one on either side) to help guide the housing over the insert 

and position the housing over the insert (see Figure 45). 

• Line up the ledges from the top of the housing with the elastomer grooves in the ground insert. 

NOTE: When the housing and insert are properly oriented, the housing will drop 

completely down flat onto the insert. The top of the insert will protrude slightly above 

the top surface of the housing. Do not force the insert and housing together. If the 

housing does not drop completely down onto the insert, the parts are not oriented 

properly. 

• 

Step 3: Install Blue Retention Elastomer 

Insert the two blue retention elastomers (from the top side) along the sides of the insert. 

• Cut the blue elastomers to the correct length, not exceeding the channel opening (see Figure 46 & 

47). 

• Use the probe tool shown on Page 8. 

Figure 45: Position the housing 

over the RCI ground insert. 

Figure 46: Insert the two blue 

retention elastomers. (cutaway 

view). 

NOTE: Retention elastomers are installed on the sides of the insert. 

NOTE: The blue retention RCI Elastomers are not the same as the blue ROL Low- 

Force XLK Elastomers. The retention elastomers are much smaller in diameter and 

are a translucent blue color. 

Figure 47: Insert the two blue 

retention elastomers. (top view). 

NOTE: Examples shown are non-Kelvin configurations. Refer to standard Pad 

ROL200 M&I Guide for the latest elastomer configurations. 

Figure 48: Proper installation of 

elastomers, contacts and insert. 

(bottom view). 




27

Pad ROL 200KR 

All statements, technical 

information and recommendations 

related to the Seller’s products 

are based on information believed 

to be reliable, but the accuracy 

or completeness thereof is not 

guaranteed. Before utilizing the 

product, the user shall determine 

the suitability of the product for its 

intended use. The user assumes 

all risks and liability whatsoever 

in connection with such use. Any 

statements or recommendations of 

the Seller which are not contained 

in the Seller’s current publications 

shall have no force or effect unless 

contained in an agreement signed 

by an authorized officer of the 

Seller. The statements contained 

herein are made in lieu of all 

warranties expressed or implied, 

including but not limited to the 

implied merchantability and fitness 

for a particular purpose which 

warranties are hereby expressly 

disclaimed. Seller shall not be liable 

to the user or any other person 

under any legal theory, including 

but not limited to negligence or 

strict liability, for any injury or 

for any direct or consequential 

damages sustained or incurred by 

reason of the use of any of Seller’s 

products or services that were 

defective. 

Worldwide Headquarters 

1210 New Brighton Boulevard 

Minneapolis, MN 55413-1641 USA 

Tel: 612.378.2020 

Fax: 612.378.2030 

E-mail: info@johnstech.com 


Regional/Field Service Office — California, USA 

2450 Scott Boulevard 

Santa Clara, CA 95050-2504 

Tel: 408.448.2020 

Fax: 408.448.2030 


Regional/Field Service Office — Singapore 

33 Ubi Ave 3, #02-37 

Vertex Building 

Singapore 408868 

Tel: 65.6659.2022 


For questions about anything contained in this Maintenance & Inspection Guide, 

contact your local Johnstech representative. 

If you are experiencing a technical problem or issue, complete the form at: 

www.johnstech.com/support or contact the nearest field service office. 

© Copyright 2012 Johnstech International 

Corporation Specifications subject to change. 

Specifications subject to change without notice. 

No part of this document may be reproduced 

in any form or by any means, electronic or mechanical, 

including photocopying, recording or 

by any information storage or retrieval system, 

without expressed written permission from 

Johnstech. Johnstech and Johnstech logo are 

registered trademarks in the USA and other 

countries. Johnstech products and components 

are covered by patents and copyrights in the 

USA and other countries. 

28 

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