Martel Electronics DPM942 - Manual

DIMENSIONS All dimensions in mm (inches)
19mm (0.75“) Digit Height
Programmable Decimal Points
Low Volt Drop
Simple Screw Terminal Connections
DPM 942
4-20mA Loop Powered Indicator
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
select your desired scaling, use the following formula:
R12 + R13 = Full Scale reading at 20mA
160
Re-calibrate as necessary.
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.
Specification Min. Typ. Max. Unit
Accuracy (overall error) * 0.05 0.1 %(±1 count)
Linearity ±1 count
Sample rate 3 samples/sec
Operating temperature range 0 50 °C
Temperature s 100 ppm/°C
Loop Volt Drop 3.9 4.3 4.8 V
*To ensure maximum accuracy, re-calibrate periodically.
tability
Stock Number
Standard Meter DPM 942
CONNECTOR SOURCING GUIDE
METHOD Screw Terminals - No Connector Required
ON BOARD
SOLDER LINKS
R25 R25
R11 R11
R12 R12
R13 R13
R14 R14
Top right hand corner of the pcb. Top right hand corner of the pcb.
61.5 (2.42)
51.0 (2.01)
Ш5.7
(0.22)
24.5
(0.96)
24.0
(0.94)
39.0
(1.54)
Ш3.0
(0.12) 71.5 (2.81)
d e
76.0 (2.99)
72.5 (2.85)
40.5
(1.59)
44.0
(1.73)
24.0
(0.94)
51.0 (2.01)
a
b c
Panel cut-out 72 x 40 (2.83 x 1.57)
Maximum panel thickness 3mm (0.12).
REAR
VIEW
DS DP1 DP2 DP3 I- I+
OFFSET SPAN
9 4
3
5 7 8 2
1
6
10
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)