User Guide

Clean and check the electrode.

• pH electrode broken or leakage (10) : The electrode

glass is broken or short circuits have been caused by moisture

or dirt.

Check pH probe and cable; replace them if necessary.

• Reference electrode broken or dirty (11) : The refer-

ence electrode is soiled or broken. Also the reference elec-

trode or the matching pin could not have been immersed

in the solution.

Clean the electrode and replace it when necessary.

• Old pH probe (12) : The pH probe is old (offset outside

of ±30 mV or slope outside the range 53.5 to 62 mV/pH).

The electrode is still working, but it is recommended to

clean or replace it.

• Dead pH probe (13) : Offset is outside of ±60 mV or

slope outside the range 40 to 70 mV/pH. Readings are not

reliable.

Try to clean the probe; if the error persists after cleaning,

replace the probe immediately.

• No calibration (14) : The device has lost its calibration

due to an EEPROM reset.

Calibrate again all the magnitudes.

• Temperature probe broken (20) : Check the tempera-

ture probe wires and connections.

Replace the probe if necessary.

• Power reset (90) : The device was restarted due to a

power failure.

• EEPROM corruption (91) : The EEPROM data is dam-

aged. Reset the EEPROM, then recalibrate and reconfigure

completely the instrument.

• Watchdog reset (92) : The device was restarted due to a

watchdog reset or a manual reset done through the key-

board.