Specifications

Transmitter M400/2(X)H, M400G/2XH 88

Printed in Switzerland 30 031 683

14.2 Cond (resistive) Error messages /

Warning- and Alarm list for ISM sensors

Alarms Description

Watchdog time-out* SW/System fault

Dry Cond sensor* Cell running dry (no measurement solution)

Cell deviation* Multiplier out of tolerance** (depends on sensor model).

* According to the parameterization of the transmitter (see chapter 8.5.1 “Alarm”;

PATH: Menu/Configure/Alarm/Clean/Setup Alarm)

** For further information refer to the sensor documentation

14.3 pH Error messages / Warning- and Alarm list

14.3.1 pH sensors except dual membrane pH electrodes

Warnings Description

Warning pH slope >102% Slope too big

Warning pH Slope < 90% Slope too small

Warning pH Zero > 7.5 pH Zero offset too big

Warning pH Zero < 6.5 pH Zero offset too small

Warning pHGls change < 0.3** Glass electrode resistance changed by more than factor 0.3

Warning pHGls change > 3** Glass electrode resistance changed by more than factor 3

Warning pHRef change < 0.3**

Reference electrode resistance changed by more

than factor 0.3

Warning pHRef change > 3** Reference electrode resistance changed by more than factor 3

Alarms Description

Watchdog time-out* SW/System fault

Error pH Slope >103% Slope too big

Error pH Slope < 80% Slope too small

Error pH Zero > 8.0 pH Zero offset too big

Error pH Zero < 6.0 pH Zero offset too small

Error pH Ref Res >150 KΩ** Reference electrode resistance too big (break)

Error pH Ref Res < 2000 Ω** Reference electrode resistance too small (short)

Error pH Gls Res > 2000 MΩ** Glass electrode resistance too big (break)

Error pH Gls Res < 5 MΩ** Glass electrode resistance too small (short)

* ISM sensors only

** According to the parameterization of the transmitter (see chapter 8.5.1 “Alarm”;

PATH: Menu/Configure/Alarm/Clean/Setup Alarm)