The document introduces a product called DPM 500-BL, which is a backlit digital voltmeter. The product has an accuracy of 0.05% and a sample rate of 3 samples per second. It also features programmable decimal points, auto-zero, and auto-polarity. The dimensions of the product are 60.0mm x 45.0mm, and it is suitable for a supply voltage range of 7.5V to 14V.
The DPM 500‑BL is a compact 3½‑digit backlit LCD module that plugs into a 40‑pin DIL socket or can be panel‑mounted with a snap‑in bezel. It offers a 12.5 mm digit height, programmable decimal points, auto‑zero, and LED backlighting.
The manual covers safety compliance with the Low Voltage Directive, mechanical dimensions, optional scaling resistors, pin assignments, annunciator connections, LED backlight wiring, and various operating modes such as floating‑voltage, current, split‑supply, and ratio measurements.
| Digit Height | 12.5 mm (0.5 in) |
|---|---|
| Full Scale Reading | 200 mV DC |
| Supply Voltage | 7.5‑9.4 V |
| Backlight Voltage | 5 V |
| Backlight Current | 30‑60 mA |
| Input Leakage Current | 1‑10 pA |
| Operating Temperature Range | 0 °C to 50 °C |
| Temperature Stability | 100 ppm/°C |
| Accuracy | ±0.7 % +1 count |
| Sample Rate | 3 samples/sec |
Input voltages to the module’s pins must not exceed 60 VDC to comply with the Low Voltage Directive.