Ams Terms - Emerson Rosemount 644 Reference Manual

Reference Data
March 2021
A.3

AMS terms

Resistance:
Resistance
threshold
exceeded:
Trigger level:
Baseline
resistance:
Reset baseline
resistance:
TC diagnostic
mode sensor 1or
2:
114
This is the existing resistance reading of the thermocouple loop.
The check box indicates if the sensor resistance has passed the
Trigger Level.
Threshold resistance value for the thermocouple loop. The trigger
level may be set for 2, 3, or 4 × Baseline or the default of 5000
ohms. If the resistance of the thermocouple loop surpasses the
Trigger Level, a maintenance alert will be generated.
The resistance of the thermocouple loop obtained after
installation, or after resetting the baseline value. The trigger level
may be calculated from the baseline value.
Launches a method to recalculate the Baseline value (which may
take several seconds).
This field will read either enabled or disabled indicating when the
thermocouple degradation diagnostic is on or off for that sensor.
Reference Manual
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