Emerson Rosemount OCX 8800, Instruction Manual

Page: 91 / 306

Section 5:
Calibration
April 2017
Instruction Manual
IM-106-880C, OI
66
Operator - Initiated
Autocalibration
between automatic COe calibrations. To disable automatic calibration for O2 and COe,
enter 0 for both CalIntrvl parameters.
5. If desired, the O2NxtCalTm and the COeNxtCalTm (next calibration time) parameters
can be changed to synchronize a calibration at a specific day or time.
When setting automatic calibration times, CalIntrvl and NxtCalTm should be set so that
O2 and COe are NOT calibrated simultaneously..
NOTE:
To select a menu item, either use the up and down arrow keys to scroll to the menu item and
press the right arrow key or use the number keypad to select the menu item number.
To return to a preceding menu, press the left arrow key.
6. From the O2 CALIB PARAMS screen, select CalIntrvl.
7. At the prompt, input a time interval (in hours) at which an automatic O2calibration will
occur and press ENTER.
8. From the DETAILED SETUP screen, select COE CALIB PARAMS.
9. From the COE CALIB PARAMS menu, select CalIntrvl.
10. At the prompt, input a time interval (in hours) at which an automatic COe calibration
will occur and press ENTER.
5.4 Operator - Initiated Autocalibration
An operator can initiate an automatic calibration at any time provided that the unit is equipped
with calibration solenoids.
5.4.1 Autocalibration using HART
To initiate an automatic calibration using HART/AMS, perform the following steps on the HART
menu tree. Refer to Section 4, Using HART Communications, for the HART menu tree.
1. Select DIAG/SERVICE from DEVICE SETUP menu.
2. Select CALIBRATE from the DIAG/SERVICE menu.
3. Select PERFORM CAL from the CALIBRATE menu.
4. Select CAL METHODS from the PERFORM CAL menu.
5. From the CAL METHODS menu, select the type of calibration desired: O2 Calibration,
COe Calibration, or O2 and COe Calibration.