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DPM 942
4-20mA Loop Powered Indicator
A loop powered indicator giving an accurate, zero corrected indication of 4-20mA loop current. Calibration is by two 20-turn cermet
potentiometers which allow sensitive adjustment of the instrument. The meter is housed in a robust carrier, which can be bolted in
place or panel mounted using the low profile bezel and clips provided.
19mm (0.75“) Digit Height
Programmable Decimal Points
Low Volt Drop
Simple Screw Terminal Connections
CUSTOM SCALING
For alternative scaling to the standard 0 - 1000, cut Link 8
and short Link 7. Add two resistors R12 and R13 which
will set the basic scale of the meter. The highest practical
value for the R12 and R13 series combination is 12R. To
Standard Meter
Stock Number
DPM 942
select your desired scaling, use the following formula:
R12 + R13 = Full Scale reading at 20mA
160
Re-calibrate as necessary.
Specification
Accuracy (overall error) *
Linearity
Sample rate
Operating temperature range
Min.
0.05
0
Typ.
3
Max.
0.1
±1
50
Unit
%(±1 count)
count
samples/sec
°C
Temperature s tability
100
ppm/°C
Loop Volt Drop
3.9
4.3
4.8
V
R25
R14
R13
R12
R11
Top right hand corner of the pcb.
*To ensure maximum accuracy, re-calibrate periodically.
CONNECTOR SOURCING GUIDE
METHOD Screw Terminals - No Connector Required
DIMENSIONS All dimensions in mm (inches)
76.0 (2.99)
72.5 (2.85)
a
a. 1.0 (0.04)
b. 2.0 (0.08)
c. 6.5 (0.26)
d. 11.5 (0.45)
e. 13.0 (0.51)
Panel cut-out 72 x 40 (2.83 x 1.57)
51.0 (2.01)
Maximum panel thickness 3mm (0.12).
61.5 (2.42)
51.0 (2.01)
?5.7
(0.22)
b c
d
e
OFFSET SPAN
REAR
VIEW
1
6
5
7 8 2
?3.0
10
9
3
4
71.5 (2.81)
(0.12)
ON BOARD
SOLDER LINKS
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