37
Reference Manual
00809-0100-4728, Rev MB
Configuration
July 2016
Configuration
Note
The thermocouple resistance algorithm does not calculate resistance values while the active calibrator
mode is enabled.
Configure T/C Diagnostic with a Field Communicator
Configure T/C Diagnostic with AMS Device Manager
1. Right click on the device and select
Configure
.
2. In the left navigation window select
Manual Setup.
3. On the Diagnostics tab, there is a group box labeled
Sensor and Process Diagnostics
; choose the
button for
Configure Thermocouple Diagnostic
.
4. Follow the screen prompts to Enable and set the values for the diagnostic.
Glossary of AMS Device Manager terms
Resistance
: This is the existing resistance reading of the thermocouple loop.
Resistance Threshold Exceeded
: The check box indicates if the sensor resistance has passed the Trigger
Level.
Trigger Level
: Threshold resistance value for the thermocouple loop. The Trigger Level may be set for 2,
3, or 4 x baseline or the default of 5000 Ohms. If the resistance of the thermocouple loop surpasses the
Trigger Level, a maintenance alert will be generated.
Baseline Resistance
: 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.
Reset Baseline Resistance
: Launches a method to recalculate the baseline value (which may take several
seconds).
TC Diagnostic Mode Sensor 1or 2
: This field will read either
Enabled
or
Disabled
indicating when the
Thermocouple Degradation Diagnostic is on or off for that sensor.
Configure T/C Diagnostic with the Local Operator Interface
Reference the figure below to find the path to the Thermocouple Diagnostic in the LOI menu.
Figure 2-22. Configuring T/C Diagnostic with LOI
* Available only if option code (S) is ordered.
From the
HOME
screen, enter the Fast Key sequence
Device Dashboard Fast Keys
2, 2, 4, 3, 4
CALIBRAT
DAMPING
VARIABLE MAP
TAG
ALM SAT VALUES
PASSWORD
SIMULATE
HART REV
HOT BACK CONFIG*
DRIFT ALERT*
TC DIAG CONFIG
TC DIAG CONFIG
MIN MAX TRACK
BACK TO MENU
EXIT MENU
CONFIG SNSR 1
CONFIG SNSR 1
CONFIG SNSR 2*
BACK TO MENU
EXIT MENU
VIEW CONFIG
SENSOR CONFIG
UNITS
RERANGE
LOOP TEST
DISPLAY
EXTENDED MENU
EXTENDED MENU
EXIT MENU
SENSOR 1 MODE
TRIGGER CONFIG
TRIGGER VIEW
SNSR OHM VIEW
BASELINE RE-SET
BASELINE VIEW
BACK TO MENU
EXIT MENU
Summary of Contents for Rosemount 644 HART
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Page 16: ...6 Reference Manual 00809 0100 4728 Rev MB Introduction July 2016 Introduction ...
Page 86: ...76 Reference Manual 00809 0100 4728 Rev MB Troubleshooting July 2016 Troubleshooting ...
Page 138: ...128 Reference Manual 00809 0100 4728 Rev MB Index July 2016 Index ...
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