Specifications

Transmitter M400 113
© 02 / 2010 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M400
Printed in Switzerland 52 121 378
14.6 Amperometric O
2
Error messages /
W
arning- and Alarm list
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 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 < –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
14.7 Optical O
2
Error messages / Warning- and Alarm list
Warnings Description
Chx Cal Required* ATC = 0 or measured values out of range
Chx CIP Counter Expired Limit of CIP cycles reached
Chx SIP Counter Expired Limit of SIP cycles reached
Chx Autocl. Count. Exp. Limit of autoclaving cycles reached
* If this warning is displayed, you will find more information about the cause for the warning in
Menu/Service/Diagnostics/O
2
optical
Alarms Description
Watchdog time-out* SW/System fault
Chx Change Spot** Replace OptoCap
Chx Signal error** Signal or value for temperature out of range
Chx Shaft error**
Temperature bad or stray light too high (e.g. because
a glass is ber broken) or shaft has been removed
Chx Hardware error** Electronic components fail
** According to the parameterization of the transmitter (see chapter 8.5.1 “Alarm”;
PATH: Menu/Configure/Alarm/Clean/Setup Alarm)
If an alarm has occurred, you will find more information about the cause for the alarm in
Menu/Service/Diagnostics/O
2
optical