HIGH VOLTAGE VOLTAGE DIVIDERS AND PROBES - Spectroscopic

VMP PROBE SERIES
(Please see also digital multimeter and VM probes brochure B-1010 or B-1012-A for
multiple match and multiple ratio to match digital voltmeters and accessories.) The
Ross VMP HV probes are designed for hand-held portable applications with insulated
handle, or mounting in a fixed position. The portable capacitive, resistive, or
compensated types are used with digital multimeters, oscilloscopes, and various
types of panel meters. Resistive types are used primarily for DC and 50 or 60Hz AC
or other specific single frequency sine wave, while the capacitive types are used for
wideband and pulse work. Compensated resistance/capacitance wideband DC to
1MHz (or more) models are preferred for general use In both the VMP and VD
Series.
Standard calibration is centered around 2/3 to 3/4 of the maximum rating and is
matched for 1 megohm, 20 to 50pF or 10 megohms 75-100pF of load input impedance
of display or recording device and optional 3, 6, or 15 feet (please specify the
shortest practicable length) of RG-59 or special Ross Engineering Corporation
VMP200A
WIDEBAND DC-1MHz
VMP60-G DC & 50/60Hz
coaxial cable. Fiber optic system or 50-75 ohm matching amplifier/coaxial cable driver
is recommended for wide-band transmission over 20 feet. Any type can be calibrated
with best accuracy and specified stability at specific frequencies, voltages
and loads within their capabilities. Unless rules of shielding and proximity are followed,
VMP series models may not be as accurate as the VD models due to wider
variation in possible proximity of walls, equipment, etc. Other ratios and matchings
are available.
MODEL
ELECTRONIC
CLASS
MODEL
POWER
CLASS
VMP30E-G VMP15-G
VMP30EA-25Y-H VMP15-25Y-H
VMP30-G
VMP30-12.5Y-H
VMP60-G
VMP60-8.3Y-H
KV MAXIMUM
OPERATE
CONTINUOUS
ELEC -
TRONIC
CLASS DC
OR PK AC
30KV
30KV
60KV
60KV
90KV
90KV
120KV
120KV
150KV
150KV
SEE BROCHURE B-1012-A FOR INSULATED HANDLES FOR HAND HELD REQUIREMENTS.
TYPICAL UNITS - MANY OTHERS AVAILABLE SPECIFICATIONS HV PROBE TYPE VOLTAGE DIVIDER OR SERIES MULTIPLIER
•
• MODEL
•
NOMINAL HV INPUT
VMP60E-G
VMP60EA-12.5Y-H
VMP90E-G
VMP90EA-8.3Y-H
VMP120-G
VMP120A-6.2Y-H
VMP150-G
VMP150A-10Y-H
VMP200A-7.6Y-H
POWER
CLASS
RMS L-L
5KV
5KV
8.25KV
8.25KV
25.8KV
25.8KV
38KV
38KV
48KV
48KV
* KV
BEST
ACCURACY
20KV
20KV
45KV
45KV
60KV
60KV
80KV
80KV
100KV
100KV
* ACCURACY
±%
DC
%
.1
.1
.1
.1
.1
.1
.1
.1
.1
.1
*50
OR
60Hz
%
1
1
1
1
1
1
1
1
1
1
*WIDE-
BAND
%
-
3dB
-
3dB
-
3dB
-
3dB
-
3dB
NORMAL
FREQUENCY
RANGE
DC, 50/60Hz
DC-1MHz
DC, 50/60Hz
DC-1MHz
DC, 50/60Hz
DC-1MHz
DC, 50/60Hz
DC-1MHz
DC, 50/60Hz
DC-1MHz
KV
MAXIMUM
IMPULSE
1.2X50
uSEC
TEST
SINGLE PULSE
60KV
60KV
120KV
120KV
150KV
150KV
200KV
200KV
250KV
250KV
RESISTANCE
MEGOHMS
300
300
600
600
900
900
1200
1200
1500
1500
CAPACITANCE
PF NORMAL
RES ONLY
25
RES ONLY
12.5
RES ONLY
8.3
RES ONLY
6.2
RES ONLY
10
** STANDARD RATIO TO
LOAD AND 15’ SPECIAL
ROSS COAX CABLE.
10MΩ
100pF
1,000/1
1,000/1
1,000/1
1,000/1
1,000/1
1,000/1
1,000/1
1,000/1
1,000/1
1,000/1
200KV 72KV 150KV .1 1 3dB DC-1MHz 300KV 1950 7.6 1,000/1 10,000/1 7’0”
LOAD
1MΩ
30pF
1,000/1
1,000/1
1,000/1
1,000/1
10,000/1
10,000/1
10,000/1
10,000/1
10,000/1
10,000/1
OSHA MIN.
CLEAR-
ANCE
2’7”
3’4”
3’4”
3’8”
5’0”
+ RECOMMENDED
MINIMUM
ALLOWABLE
HANDLE LENGTH IN FEET
INCLUDING HAND HOLD
RECOM-
MENDED
LENGTH
3’11” - 4’7”
4’8” - 5’4”
4’8” - 5’4”
5’0” - 5’7”
6’4” - 6’11”
8’4” - 8’11”
NOM.
POWER
CLASS
6’-9’
7.5’ - 9’
7.5’ - 9’
VMP250A-6.2Y-H
VMP300A-5Y-H
250KV 95KV 187KV .1 2 3dB DC-1MHz 400KV 2400 6.2 1,000/1 10,000/1 7’0”
300KV 121KV 225KV .2 3 3dB DC-1MHz 500KV 3000 5 1,000/1 10,000/1 7’0”
8’4” - 8’11”
8’4” - 8’11”
VMP400A-3.8Y-H
400KV 145KV 300KV .2 5 3dB DC-1MHz 600KV 3900 3.8 1,000/1 10,000/1 11’0”
* With proper proximity of nearby conducting surface and test point size. Accuracy can be
improved by calibrating with known proximity. Accuracy is at 2/3 to 3/4 of max rating unless
otherwise required. Calibration points are every 10 to 20% and are included with instruction
manual. Other calibration points are optional.
* Some probes are subject to limits on frequency, and proximity of HV and conductive surfaces,
to obtain stated accuracies.
** Most standard models are single ratio, single or dual load matching to oscilloscope or DMM.
Higher input resistance or capacitance and other ratios available including multiple matching
and multiple ratios.
• Power class is rated on the basis of 3 phase line to line and BIL (basic impulse level)with high
safety factor. Electronic class is rated on max continuous operate without overheating, but
with less safety factor. Impulse is a test rating only.
INCHES
(MILLIMETERS)
COMPENSATED TYPE
WIDEBAND
PROBE
RESISTIVE TYPE
DC, 50/60Hz
PROBE
2.76 DIA
(70.00)
HV TERMINAL
1/4-28 UNF
1.25 DIA
(31.7)
.60 (15.2)
10-32 THREAD
OR CORONA NUT
B
A
+ Handle length includes handhold of 12” to 24” based on OSHA regulations. See OSHA Title 8,
Page 390, Table 2940.2.
Insulating handles and heavy superflex insulated ground leads are available.
See brochure B-1010, B-1012, and B-1017 for addditional information on handles, digital probes
and digital displays.
Note: Change -H to -J and -G to -GJ if insulated handles are required. See B-1012A or B-
1017B for recommended handle lengths.
Specifications are for reference only and are subject to change.
Contact Ross Engineering Corporation for current dimensions.
STANDARD
BNC CONNECTOR
1.50
(38.1)
TANK VALVE
PRESSURE GAUGE
.84
(21.3)
BNC CONNECTOR
10-32 UNF
GROUND STUD
10-32 UNF
GROUND TERMINAL
THIS SIDE
.88
(22.3)
1.66
(42.2)
5/8-11 THREAD
OPTIONAL CABLE
WITH BNC OR
OTHER CONNECTOR
2.75
(69.9)
5/8-11 THREAD
DIMENSIONS
MODEL A B
VMP 15-G
VMP 15-25-H
VMP 30-G
VMP 30-H
VMP 60-G
VMP 60-H
VMP 120-G
VMP 120-H
VMP 150-G
VMP 150-H
VMP 200-H
VMP 250-H
VMP300-H
VMP 400-H
12’4” - 12’11”
12.09
(307.0)
-
-
16.75
(425.4)
-
-
24.00
(609.6)
-
-
31.50
(800.1)
-
-
56.5
(1,435.1)
-
-
-
-
-
-
-
-
-
-
-
-
8.91
(226.3)
-
-
12.91
(327.9)
-
-
16.95
(430.5)
-
-
21.12
(536.9)
-
-
24.68
(626.8)
30.53
(775.4)
33.50
(850.9)
43.46
(1103.8)
-
-
7