Rosemount 6888Xi, Reference Manual, Page: 74 / 114

66 Configuration, Startup and Operation
Section 3: Configuration, Startup and Operation Reference Manual
January 2019 00809-0100-4892
1. From the calibration prompt screen, press the LEFT arrow key to return to the CALIBRATION
menu.
2. From the CALIBRATION menu, select ABORT CALIBRATION then press ENTER.
3. At the prompt, select ENTER to verify the abort command.
4. The cycle will halt in approximately 10 seconds. When prompted, press ENTER to continue.
5. The abort will continue with a purge delay according to the time programmed in the cali-
bration setup. When the purge time expires and the step indicates IDLE, the abort process
is completed. Press EXIT, then OK to return to the CALIBRATION menu.
O
2
Calibration with 6888Xi and Field Communicator
1. Use the 375/475 Field Communicator to access the main HART menu.
2. From the main menu, select CONFIGURE.
3. From the CONFIGURE menu, select CALIBRATION.
4. From the CALIBRATION menu, again select CALIBRATION.
5. From the CALIBRATION menu, select O2 CALIBRATION.
6. In the first screen, a “Loop should be removed from automatic control” warning occurs.
Remove the 6888Xi from any automatic controls loops to avoid a potentially dangerous
operating condition. Press OK when ready.
7. At the next screen when step shows APPLY GAS 1, press OK to return to the SELECT ACTION
menu.
8. At the SELECT ACTION menu, select STEP CALIBRATION then ENTER to begin the calibration
with Flow Gas 1.
9. When Flow Gas 1 and Read Gas 1 are complete and the step shows APPLY GAS 2, press OK
to return to the SELECT ACTION menu.
10. At the SELECT ACTION menu, select STEP CALIBRATION then ENTER to continue the calibra-
tion with Flow Gas 2.
11. When Flow Gas 2 and Read Gas 2 are complete and the step shows STOP GAS, press OK to
return to the SELECT ACTION menu.
12. At the SELECT ACTION menu, select STEP CALIBRATION then ENTER to continue the calibra-
tion with Purge.
13. When the step shows IDLE, press OK to return to the SELECT ACTION menu.
14. At the SELECT ACTION menu, select EXIT CALIBRATION, press ENTER, then OK to return to
the CALIBRATION menu.
15. At the CALIBRATION menu, select RESULT.
16. At the RESULT menu, the results of the calibration will be displayed. In the event the cali-
bration cycle fails, the reason will be displayed here as well. The calibration results are
described as follows:
Success – Calibration completed successfully.
Failed Constant – The calculated calibration constant is outside the range of ±20.00.
Failed Slope – The calculated calibration slope is outside the range of 34.5 to 57.5.
Failed Temperature – With the extended temperature function enabled and the operating
above the heater set point, the process temperature varied by more than ±5°C during the
calibration cycle.
Gas 1 Tolerance Error – The measured value for gas 1 varied more than ±10% from the pro-
grammed value. Possible causes are incorrect gas value programmed in the 6888XI, incor-
rect gas value in bottle, or gas bottle is empty. This error can occur only if the Tolerance
Check feature is active.
Gas 2 Tolerance Error – The measured value for gas 2 varied more than ±10% from the pro-
grammed value. Possible causes are incorrect gas value programmed in the 6888XI, incor-
rect gas value in bottle, or gas bottle is empty. This error can occur only if the Tolerance