The SP 400-BLUE is a panel meter with a 200mV d.c. measurement range, auto-zero, and auto-polarity features. The decimal points can be selected by the user. LED backlighting ensures excellent readability under low light conditions. The module can be easily installed into the panel using the provided fixing clip. The SP 400-BLUE also features a negative rail generator, allowing the meter to measure a signal referenced to its own power supply GND. Its blue low cost makes it suitable for both high and low volume applications. The panel meter's housing design ensures splash proofing with the supplied seal.
The SP 400‑BLUE module provides a 200 mV d.c. measurement range with auto‑zero, auto‑polarity and selectable decimal points. It features a built‑in negative rail generator, blue LED backlighting for low‑light readability, and a splash‑proof housing with a fixing clip for easy panel mounting.
Electrical specifications include a 0.1 % overall accuracy, 2.5 samples/sec sample rate, and operation over 0‑50 °C. The module can be powered from 3.0‑7.5 V (V+ to GND) or 6.0‑15.0 V (V+ to V‑) supplies, with low‑battery warning and optional external resistors for higher voltages. Pin functions and a functional block diagram are provided for integration, and safety compliance follows the Low Voltage Directive and BS EN 61010.
| Full Scale Reading | 200 mV d.c. |
|---|---|
| Digit Height | 9.75 mm (0.38") |
| Supply Voltage (V+ to GND) | 3.0 V – 7.5 V |
| Accuracy | ±0.1 % (overall error) |
| Sample Rate | 2.5 samples/sec |
| Operating Temperature | 0 °C – 50 °C |
| Temperature Stability | 100 ppm/°C |
| Supply Current (V+ to GND) | 350 µA |
| Backlight Supply Voltage | 7.5 V – 8.0 V |
| Input Leakage Current | 1 pA – 10 pA |
It measures up to 200 mV d.c. full‑scale.
The blue LED backlight is powered via the BL‑ pin; for supply voltages above 7.5 V a series resistor must be added.
It complies with the Low Voltage Directive (LVD 93/68/EEC) and the relevant sections of BS EN 61010.
The module can be powered from 3.0 V‑7.5 V (V+ to GND) or 6.0 V‑15.0 V (V+ to V‑).