The DPM 500S is a high-precision, low-power, single-rail digital multimeter with a 3½-digit LCD display, programmable decimal points, auto-zero, auto-polarity, 200mV dc full scale.
The DPM 500S is a compact 3½‑digit LCD measurement module offered in a 40‑pin DIL format. It features programmable decimal points, auto‑zero, auto‑polarity and optional scaling resistors to adjust full‑scale range.
This manual covers physical dimensions, connector pinout, scaling resistor calculations, safety compliance with the Low Voltage Directive, panel fitting instructions, pin functions, operating modes and detailed electrical specifications.
| Digit Height | 12.5 mm (0.5 in) |
|---|---|
| Accuracy (overall error) | 0.05 % typical |
| Linearity | ±1 count |
| Sample Rate | 3 samples/sec |
| Operating Temperature Range | 0 °C to 50 °C |
| Temperature Stability | 100 ppm/°C |
| Supply Voltage | 3.5 V – 6.5 V |
| Supply Current | 250 µA |
| Input Leakage Current | 1 – 10 pA (Vin = 0 V) |
| Full‑Scale Reading (Scaling Resistors) | 2 V with Ra = 910 kΩ, Rb = 100 kΩ |
The module operates from 3.5 V up to 6.5 V supply voltage.
By fitting two external scaling resistors Ra and Rb as shown in the scaling table.
The Low Voltage Directive (LVD 93/68/EEC) applies to the input voltages.
Fit the bezel to the front of the panel and snap the meter into the bezel from behind.