Operating menu and parameter description iTEMP TMT82
70 Endress+Hauser
13.1.1 "Extended Setup" submenu
Corrosion monitoring
Sensor connection cable corrosion can lead to false measured value readings. Therefore
the unit offers the possibility of recognizing any corrosion before a measured value is
affected. Corrosion monitoring is only possible for RTDs with a 4-wire connection and
thermocouples.
Drift/difference mode
If two sensors are connected and the measured values differ by a specified value, a status
signal is generated as a diagnostic event. The drift/difference monitoring function can be
used to verify the correctness of the measured values and for mutual monitoring of the
connected sensors. Drift/difference monitoring is enabled with the Drift/difference mode
parameter. A distinction is made between two specific modes. If the In band option is
selected (ISV1-SV2I < drift/difference set point), a status message is issued if the value
drops below the set point, or if the value exceeds the set point if the Out band (drift)
option is selected (ISV1-SV2I > drift/difference set point).
Procedure for configuring the drift/difference mode
1. Start
ß
2. For drift/difference monitoring, select Out band for drift detection and In band for difference monitoring.
ß
3. Set the alarm category for drift/difference monitoring to Out of specification (S), Maintenance required
(M) or Failure (F) as required.
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4. Set the set point for drift/difference monitoring to the desired value.
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5. End
A0014782
18 Drift/difference mode
A Value under range
B Value over range
D Drift
L+,
L-
Upper (+) or lower (-) set point
t Time
x Diagnostics event, status signal is generated
Enter access code
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