CALIBRATION
ON-LINE CALIBRATION
I-E96-315B
4 - 5
3. Check valve operation.
a. If the valve operates smoothly at all demand levels.
•
1. Remove the HSS and raise the controller gain (switch 2)
to the next setting. For example, if the gain is 1 (position 8
is closed), change the gain to 2 (close position 7, open posi-
tion 8).
2. Reinsert the module in the MMU.
3. Repeat steps 1 and 2.
b. If the valve oscillates at any demand level.
1. Remove the HSS and lower the gain (switch 2) to the
next setting. For example, if the gain is 13 (position 4 is
closed), change the gain to 10 (close position 5, open posi-
tion 4).
2. Reinsert the module in the MMU.
3. Go to step 4.
4. Repeat steps 1 and 2 to check valve operation at each
demand level. The controller gain is set when you reach
this point and have smooth valve operation.
5. Record the date, time, gain setting and the names of the
personnel tuning the controller in the space provided in
Table
. Update the controller tuning log when making
any adjustment in controller tuning.
NOTE: Do not start operating the HSS until S3 of function code 150
is reset to 0. A calibration cycle could start if the module is reset and
S3 is set to 1.
ON-LINE CALIBRATION
On-line calibration is possible when there are other controlling
valves on-line that are operating properly. The hydraulic servo
slaves for those valves will compensate for the repositioning of
valve and actuator in calibration. To do an on-line calibration:
Refer to
valve and actuator calibration procedure.
