DPM 3AS-BL 3½ Digit Backlit LCD Voltmeter Module is a low power voltage measurement module with a 200mV DC full scale measurement range, supports auto-zero and auto-polarity, can be user-selected decimal points, LED backlight can ensure excellent readability in low light conditions. The module is easy to install, and the negative rail generator enables the meter to measure a signal referenced to its own power supply GND. The design of the panel meter's housing allows the module to be low cost, which will suit high and low volume applications. The DPM 3AS-BL is intended to replace the DPM 3, DPM 3S, DPM 3-BL and DPM 3S-BL in many applications, usually requiring only minor circuit modifications.
The DPM 3AS-BL module provides a 200 mV d.c. measurement range with auto‑zero, auto‑polarity and selectable decimal points. It features a negative rail generator for measuring signals referenced to its own supply ground and LED backlighting for low‑light readability. The compact housing snaps easily into a panel and is suitable for both high‑ and low‑volume applications.
Technical data include accuracy of ±0.7 % (+1 count), a sample rate of 2.5 samples/sec, and supply options of 3.0‑7.5 V (V+ to GND) or 6.0‑15.0 V (V+ to V‑). Pin functions, scaling resistors, and solder‑link options allow configuration of decimal points and backlight voltage. Safety compliance follows the Low Voltage Directive (LVD 93/68/EEC) and BS EN 61010.
| Full Scale Reading | 200 mV d.c. |
|---|---|
| Linearity | ±7 count |
| Sample Rate | 2.5 samples/sec |
| Operating Temperature Range | 0‑50 °C |
The module measures up to 200 mV d.c. full‑scale.
Decimal points are enabled by closing the corresponding solder links (DP1, DP2, DP3).
It complies with the Low Voltage Directive (LVD 93/68/EEC) and BS EN 61010.