Operator's manual for the RKI Instruments GP-03 single‑channel LEL gas monitor, covering setup, operation, calibration and maintenance.
The GP-03 is a compact, single‑channel LEL gas monitor designed for detecting combustible gases such as methane. It features a backlit LCD, audible and vibration alarms, and data‑logging capabilities for use in hazardous environments like petrochemical plants and tunnels.
This manual provides detailed instructions for start‑up, calibration modes, sensor replacement, battery handling, and troubleshooting, along with a full parts list and optional accessories.
| Target Gas | Combustible Gas, Methane (CH4) |
|---|---|
| Detection Range | 0 to 100% LEL |
| Display Increment | 1% LEL |
| Detection Principle | Catalytic Combustion Method |
| Alarm Points | Low 10% LEL, High 50% LEL, Over‑range 100% LEL |
| Response Time (T90) | 30 seconds |
| Accuracy | ±5% of reading or ±2% LEL |
| Power (Batteries) | Two AAA alkaline (Duracell MN2400 or PC2400) or optional Ni‑MH |
| Continuous Operating Hours | 35 h (alkaline) / 30 h (Ni‑MH) at 25 °C |
| Case | High‑impact plastic, dust‑ and weather‑proof |
| Dimensions | 54 mm W × 67 mm H × 24 mm D; 80 g |
| Operating Temperature & Humidity | -20 °C to +50 °C, <90 % RH (non‑condensing) |
Typical calibration frequencies for most applications are between 1 and 3 months, but may be adjusted based on usage.
The GP-03 uses two AAA alkaline batteries (Duracell MN2400 or PC2400) as standard, with optional Ni‑MH batteries available.
The instrument detects combustible gas from 0 % to 100 % LEL.
Low alarm at 10 % LEL, high alarm at 50 % LEL, and an over‑range alarm at 100 % LEL.
This manual explains 3 error codes. Open a code for its meaning, causes and what to do: