The SP 300-BLUE is a 3.5-digit LED digital voltmeter module produced by Lascar Electronics, with a 200mV DC range, auto-zero and auto-polarity function.
The SP 300‑BLUE module provides a 200 mV DC full‑scale reading with auto‑zero and auto‑polarity, a blue LED display for low‑light readability, and a negative rail generator that allows measurement referenced to its own power supply. It is panel‑mountable using a fixing clip and is designed for both high‑ and low‑volume applications with splash‑proof housing.
The manual includes electrical specifications, safety guidelines complying with the Low Voltage Directive, dimensions, pin configurations, circuit diagram, scaling options, and application notes for voltage, current, and 4‑20 mA loop measurements.
| Accuracy (overall error) | ±0.7 % (+1 count) |
|---|---|
| Linearity | ±1 count |
| Sample rate | 2.5 samples/sec |
| Operating temperature range | 0 °C to 50 °C |
| Warm‑up time | 10 minutes |
| Temperature stability | 150 ppm/°C |
| Supply voltage | 4.75 V – 5.25 V |
| Supply current | 50 mA |
| Input leakage current (Vin = OV) | 1 × 10⁻¹⁰ A |
The module has a 200 mV DC full‑scale reading.
It operates from a supply voltage between 4.75 V and 5.25 V.
Yes, the housing and seal provide splash proofing for many applications.
Decimal points are user‑selectable and programmable.