hn-modul sim 2 - sil 7 - reichl emv

HED281 ■ HED282 ■ DPM951 ■ DPM952
Multi-current Measurement
I
Caution: In 5V operation on both the HED281/DPM951 and
HED282/DPM952, the shunt resistor must be between the load and
OV/ground or the module will be damaged.
Two HED28 measuring current and voltage from common supply
The shunt resistor must be between the load and Ov/ground or
the module will be damaged.
Resistance Ratio Measurement
Display
Value
200 A fs
2mA fs
20mA fs
200mA fs
2A fs
R x1000
unknown
=
R
ref
4 x 1N4148
diodes
R
unknown
900R0
90R0
9R0
0R9
14W 14W 14W 14W 0R1 1
2W
8
R
ref
7
1
2
1
REF HI
REF LO
IN HI
IN LO
IN HI
IN LO
2
V+
BP
BP
DP1
DP2
DP3
V+
BL
BP
BP
DP1
DP2
DP3
V-
BL
V-
Application
Circuits
Backlight
Options
Decimal
Point
Options
Link: HED282/DPM952 HED281/DPM951
Floating I/P LK2,3, 4 & 6 LK4 & 6 and connect
voltage (5V) CN1 pins 4, 5 & 7
Floating I/P LK3, 4 & 5 LK4 & 5 and connect
voltage (9V) CN1 pins 5 & 7
I/P common to LK1, 2, 3, 4 & 6 LK4 & 6 and connect
0V (5V) CN1 pins 2, 4, 5 & 7
I/P common to Not possible Not possible
0V (9V)
V+
V -
Unit Reading Voltage
2 4 3 5 7
Backlight
Options
Decimal
Point
Options
Link: HED282/DPM952 HED281/DPM951
5V Supply LK2 & 6 LK6 and connect
CN1 pins 4 & 5
9V Supply LK5 LK5
R A
2 4 3 5 7
Unit Reading Current
1
5V Regulator
Shunt Resistor
1
R B
Load
Temperature Measurement
using a Signal Diode
2-core
screened
cable
220K0
1N4148 diode
220K0
Scale
Adj
100K0
220K0
Zero
Adj
100K0
IN HI
1
IN LO
2
REF HI
8
5
COMMON
Temperature Measurement Set Up
1 Adjust the SCALE ADJ pot to read 100mV between
REF HI (pin8) and COM (pin 5)
2 With the temperature probe diode at 0ºC adjust the
ZERO ADJ pot to indicate 00.0 on the display.
3 Increase the temperature of the probe to a known value (xºC).
When the display has stabilised, take a reading (yºC).
4 Calculate the new value for REF HI voltage as
yºC/xºC x 100mV.
5 Adjust the SCALE ADJ pot to read the new REF HI value
between REF HI (pin 8) and COM (pin 5)
Temperature Measurement
using a Thermocouple
V+
BL
BP
BP
DP1
DP2
DP3
Link: HED282/DPM952 HED281DPM951
5V Supply LK2, 3 & 6 LK6 and connect
CN1 pins 4, 5 & 7
9V Supply LK3 & 5 LK5 and connect
CN1 pins 5 & 7
8 -18Vdc
100µ
0V
+
In
78L05
Out
Common
100n
100n
Type K
Thermocouple
13 12 11
Theoretical Range using ‘K’ Thermocouple: 0-2,000ºC
(Practical range depends on range of thermocouple used) LED1
provides indication of overload or themocouple open circuit.
V-
1
IN HI
IN LO
2
Backlight
Options
V+
BL
BP
BP
DP1
DP2
DP3
Decimal
Point
Options
Ordering Information
HED281-R / DPM951-R 24x48mm Multimeter.
HED281-T / DPM951-T 24x48mm Multimeter with backlight.
HED282-R / DPM952-R 36x72mm Multimeter.
HED282-T / DPM952-T 36x72mm Multimeter with backlight.
14
1
LED1
560R
4
AD595
Link: HED282/DPM952 HED281/DPM951
LK1, 2, 3, 4 & 6 LK4 & 6 and connect
CN1 pins 2, 4, 5 & 7
7
9
8
1M0
10K
V-
Backlight
Options
Decimal
Point
Options
15