70
Reference Manual
00809-0200-4728, Rev RA
Section 5: Operation and Maintenance
April 2015
Use the following procedures to perform a sensor trim on the 644:
Performing a sensor trim using a Field Communicator
1.
Connect the calibration device or sensor to the transmitter. (If using an active
calibrator, see
“Active calibrator and EMF compensation” on page 71
2.
Connect the communicator to the transmitter loop.
From the
HOME
screen, enter the Fast Key sequence.
The communicator will ask “Are you using an active calibrator?”
a.
Select
No
if a sensor is connected to the transmitter
b. Select
Yes
if using a calibration device. By selecting yes, the transmitter will switch into
active calibration mode (see “Active Calibrator and EMF Compensation”). This is critical
if the calibrator requires constant sensor current for calibration. If using a calibration
device that can accept pulsed current, select “No.”
Performing a sensor trim using AMS Device Manager
1.
Right click on the device and select
Overview
.
2.
On the main Overview tab, select the
Calibrate Sensor(s)
button near the bottom of
the window.
3.
Follow the screen prompts through the Sensor Trimming process.
Performing a sensor trim using LOI
Reference the below image for guidance on where to find Sensor Calibration in the LOI menu.
Figure 5-2. Trimming the Sensor with the LOI
Device Dashboard Fast Keys
3, 4, 4, 1
CALIBRAT
CALIBRAT
DAMPING
VARIABLE MAP
TAG
ALM SAT VALUES
PASSWORD
....
VIEW CONFIG
SENSOR CONFIG
UNITS
RERANGE
LOOP TEST
DISPLAY
EXTENDED MENU
EXTENDED MENU
EXIT MENU
SENSOR 1 CALIB
SENSOR 1 CALIB
SENSOR 2 CALIB*
SENSOR 2 CALIB*
ANALOG TRIM
FACTORY RECALL
BACK TO MENU
EXIT MENU
....
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