LASCAR DPM 942 Mode D'emploi page 2

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.
SAFETY
To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module's pins must not exceed 60Vdc. If
voltages to the measuring inputs do exceed 60Vdc, then fit scaling resistors externally to the module. The user must ensure that
the incorporation of the DPM into the user's equipment conforms to the relevant sections of BS EN 61010 (Safety Requirements
for Electrical Equipment for Measuring, Control and Laboratory Use).
TERMINAL FUNCTIONS
1. I+ Positive current input.
2. I- Negative current input.
3. DP3 1.000
4. DP2 10.00 Decimal point inputs.
5. DP1 100.0
6. DS Decimal Point select. Connect to required DP input to display decimal point.
CALIBRATION
The meter is supplied calibrated to read 000 for 4mA loop current and 1000 for 20mA.
To re-calibrate:
1. Apply 4mA to I+/I- and adjust 'OFFSET' to read 000.
2. Apply 20mA and adjust 'SPAN' to read 1000.
3. Repeat steps 1 and 2 until there is no more adjustment of 'SPAN' and 'OFFSET' required to give desired readings.
VARIOUS OPERATING MODES
ON-BOARD LINKS: In order to quickly and easily change operating modes for different
applications, the meter has several "on-board links". They are designed to be easily opened
(cut) or shorted (soldered).
The DPM 942 is powered from the 4-20mA signal loop and needs no other power supply.
Ensure correct polarity when connecting.
All manuals and user guides at all-guides.com
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
2
R25
R14
R13
R12
R11
PCB
Normally SHORTED
Cut to OPEN
Normally OPEN
Solder to SHORT