This document is the instruction manual for Hanna HI 9813-5 and HI 9813-6 portable pH/EC/TDS/°C meters.
This manual provides instructions for using the Hanna Instruments HI 9813-5 and HI 9813-6 portable combination meters. These splash-proof devices measure pH, EC (conductivity), TDS, and temperature with automatic temperature compensation. The HI 9813-6 model includes a unique Cal-Check feature to monitor probe calibration status.
| Temperature Coefficient | 2%/°C |
|---|---|
| Warranty Period (Meter) | Two years |
| Warranty Period (Probes) | Six months |
It is recommended to recalibrate frequently, specifically whenever the electrode is replaced, at least once a month, after testing aggressive chemicals, or if extreme accuracy is required.
If turning the knob cannot reach the needed value, or if the Cal-Check feature displays 'Clean Probe and Calibrate', cleaning is required.
It indicates that the reading is out of range.