
Transmitter M400/2(X)H, M400G/2XH 90
© 03 / 2014 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M400/2(X)H, M400G/2XH
Printed in Switzerland 30 031 683
14.4 Amperometric O
2
Error messages /
Warning- and Alarm list
14.4.1 High level oxygen sensors
Warnings Description
Warning O
2
Slope < – 90 nA Slope too big
Warning O
2
Slope > – 35 nA Slope too small
Warning O
2
ZeroPt > 0.3 nA Zero offset too big
Warning O
2
ZeroPt < – 0.3 nA Zero offset too small
Alarms Description
Watchdog time-out* SW/System fault
Error O
2
Slope < –110 nA Slope too big
Error O
2
Slope > – 30 nA Slope too small
Error O
2
ZeroPt > 0.6 nA Zero offset too big
Error O
2
ZeroPt < – 0.6 nA Zero offset too small
Electrolyte Low* Too low level of electrolyte
* ISM sensors only
14.4.2 Low level oxygen sensors
Warnings Description
Warning O
2
Slope < – 460 nA Slope too big
Warning O
2
Slope > – 250 nA Slope too small
Warning O
2
ZeroPt > 0.5 nA Zero offset too big
Warning O
2
ZeroPt < – 0.5 nA Zero offset too small
Alarms Description
Watchdog time-out* SW/System fault
Error Install O
2
Jumper
In case of using InPro 6900 a jumper has to be
installed (see chapter:
Connection of Sensor – Dissolved Oxygen)
Error O
2
Slope < – 525 nA Slope too big
Error O
2
Slope > – 220 nA Slope too small
Error O
2
ZeroPt > 1.0 nA Zero offset too big
Error O
2
ZeroPt < – 1.0 nA Zero offset too small
Electrolyte Low* Too low level of electrolyte
* ISM sensors only
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