DPM 942 is a 4-20mA loop powered indicator with programmable decimal points, low volt drop and simple screw terminal connections.
This manual describes the Lascar DPM 942 loop powered indicator, a device that displays 4‑20 mA loop current with zero‑corrected accuracy. It includes details on dimensions, digit height, sample rate, and electrical characteristics such as loop voltage drop and temperature stability.
The document also covers installation options, connector wiring, custom scaling, on‑board link configuration, calibration procedures, and safety compliance with the Low Voltage Directive and BS EN 61010.
| Digit Height | 19 mm (0.75 in) |
|---|---|
| Sample Rate | 3 samples/sec |
| Operating Temperature Range | 0 °C to 50 °C |
| Temperature Stability | 100 ppm/°C |
| Loop Voltage Drop | 3.9 V (typical) |
| Panel Cut‑out | 72 mm × 40 mm (2.83 in × 1.57 in) |
| Maximum Panel Thickness | 3 mm (0.12 in) |
Apply 4 mA to I+/I‑ and adjust the OFFSET to read 000, then apply 20 mA and adjust the SPAN to read 1000, repeating until the readings are stable.
The loop voltage drop is typically between 3.9 V and 4.3 V.
It must comply with the Low Voltage Directive (LVD 93/68/EEC) and BS EN 61010 for electrical measuring equipment.
The panel cut‑out is 72 mm × 40 mm (2.83 in × 1.57 in) and the maximum panel thickness is 3 mm (0.12 in).