Minimum/Maximum Tracking Diagnostic - Emerson Rosemount 644 Reference Manual

Reference Manual
00809-0200-4728, Rev RA
Configure T/C Diagnostic with AMS Device Manager
1.
2.
3.
4.
AMS 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 2-21. Configuring T/C Diagnostic with LOI
VIEW CONFIG
SENSOR CONFIG
UNITS
RERANGE
LOOP TEST
DISPLAY
EXTENDED MENU EXTENDED MENU
EXIT MENU
* Available only if option code (S) or (D) is ordered.
2.11.4

Minimum/maximum tracking diagnostic

Minimum and maximum temperature tracking (min/max tracking) when enabled records
minimum and maximum temperatures with date and time stamps on Rosemount 644 HART
Head mount and Field mount Temperature Transmitters. This feature records values for Sensor
Configuration
Right click on the device and select Configure.
In the left navigation window select Manual Setup.
On the Diagnostics tab, there is a group box labeled Sensor and Process Diagnostics;
select the button for Configure Thermocouple Diagnostic.
Follow the screen prompts to Enable and set the values for the diagnostic.
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
Section 2: Configuration
CONFIG SNSR 1 CONFIG SNSR 1
SENSOR 1 MODE
CONFIG SNSR 2*
TRIGGER CONFIG
BACK TO MENU
TRIGGER VIEW
EXIT MENU
SNSR OHM VIEW
BASELINE RE-SET
BASELINE VIEW
BACK TO MENU
EXIT MENU
April 2015
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