DPM 750S-BL is a 200mV DC full scale, 3.0 to 7.5V or 6.0 to 15V DC powered, backlit digital panel meter produced by LaSCAR.
The DPM 750S-BL module is a 3½‑digit backlit LCD voltmeter offering a 200 mV DC full‑scale range, auto‑zero, auto‑polarity and a negative rail generator for measuring signals referenced to its own supply ground. It features LED backlighting, low‑drift bandgap reference and optional IP67/NEMA 4X waterproof bezel.
The service manual covers electrical specifications, safety compliance, mechanical dimensions, pin configuration, circuit diagram, scaling adjustments, solder link settings and application notes, enabling users to install, calibrate and maintain the module safely and accurately.
| Accuracy (overall error) | 0.1 % (+1 count) |
|---|---|
| Linearity | 7 count |
| Sample rate | 2.5 samples/sec |
| Operating temperature range | 0 – 50 °C |
| Temperature stability | 50 ppm/°C |
| Supply voltage V+ to GND | 3.5 – 7.5 V |
| Supply voltage V+ to V- | 6 – 15 V |
| Supply current V+ to GND | 500 µA |
| Supply current V+ to V- | 350 µA |
| Backlight supply voltage | 4.75 – 5.0 V |
| Backlight supply current @5 V | 30 – 50 mA |
| Input leakage current (Vin = 0 V) | 1 – 10 pA |
The module provides a 200 mV DC full‑scale reading.
The backlight draws about 30 mA at a typical 5 V supply.
An external series resistor must be added when the supply exceeds 5 V.