This manual explains installation, operation, calibration, settings, storage and maintenance for the Mettler Toledo EL3 portable conductivity meter.
The EL3 portable conductivity meter is a compact, IP5X‑rated instrument designed for educational use. It features an LCD display, battery operation with up to 250 hours of life, and a built‑in memory for up to 30 measurement results.
The manual covers safety precautions, step‑by‑step installation of the battery and electrode holder, detailed operating procedures for measurement, calibration with standard solutions, parameter adjustments, data storage, self‑test, and factory‑reset functions. Technical specifications and appendices provide reference data for standard solutions and temperature‑compensation coefficients. This manual is written in Chinese.
| Conductivity measurement range | 0.00 µS/cm to … mS/cm |
|---|---|
| Temperature measurement range | 0 °C to 80 °C |
| Accuracy class | 0.5 级 |
| Conductivity resolution | 0.00 µS/cm (auto‑range) |
| Temperature resolution | 0.0 °C |
| Battery requirement | AAA/LR3 1.5 V or NiMH 1.2 V |
| Display type | LCD |
| IP rating | IP5X (entire system) |
| Battery life | ≥ 250 hours |
| Operating temperature range | 5 °C to 80 °C |
| Relative humidity range | 5 % to 80 % (non‑condensing) |
Pull up the button on the battery cover, press the cover with two fingers to remove it, insert an AAA (or LR3) battery as indicated, then close the cover so the button snaps back into place.