User Guide

PROBE MAINTENANCE

PERIODIC MAINTENANCE

Inspect the probe and the cable. The cable used for the connection to

the meter must be intact and there must be no points of broken

insulation on the cable or cracks on the probe stem or bulb.

Connector must be perfectly clean and dry. If any scratches or cracks

are present, replace the electrode. Rinse off any salt deposits with

water.

CLEANING PROCEDURE

For better accuracy in measurements and to ensure a good perfor-

mance of the probe, a frequent cleaning is recommended.

For this purpose, soak it in Hanna HI 700661 Cleaning Solution for

5 minutes.

Note: For particular dirty (as for example protein, oil or grease) see

the "Accessories" section for Hanna specific solutions.

HI 9813-6 only:

CAL-CHECK FEATURE / CLEAN & CAL PROCEDURE

The unique Cal-Check feature allows the user to check the meter

calibration status at any time. Simply follow the below procedure for

a quick and easy operation.

• Rinse the probe with water.

• Immerse the probe in the HI 50021 Check Solution.

Note: If the reading is around pH 4.0, the probe is broken and has

to be replaced.

• Press the CHECK key.

• If the green LED lights up, the

meter is calibrated.

• If the red LED lights up, Cleaning

is needed:

1. immerse the probe in the HI 700661 Cleaning Solution (or in

one of the available specific solutions - see "Accessories" section) for

5 minutes, then rinse it with tap water;

2. immerse again in the HI 50021 Check Solution and press

the CHECK key;

3. if the green LED lights up, the meter does not need

calibration;