Specifications

WESTLOCK CONTROLS CORPORATION
280 MIDLAND AVENUE, SADDLE BROOK, NJ 07663 TEL: [phone] FAX: [phone]
www.westlockcontrols.com
1/12/10 TECH-439/D.W.O. 19024 Page 25 of 58
4.2 Automatic Calibration
The Automatic Calibration
(ACAL) performs several
self-adjustments, as well as
a zero calibration, a span
calibration, and tunes the
positioner’s PID gain
settings. From the normal
operation screen, press the
CAL button until ACAL is
shown on the display (the
ACAL routine is shown to
the right). Press and hold
the CAL button until it starts
the automatic calibration, of
which the first step in the
sequence is the Sensor
Calibration.
SPECIAL NOTE Flow Capacity:
ICoT 5000 standard flow design is suitable for actuator swept volumes of a minimum 40
inch
3
(0.65 liters) to a maximum of 600 inch
3
(9.80 liters) for proper Auto Calibration
functionality. It should also be noted that this is to be used as a general guideline only.
The actuator/ valve package dynamics would dictate the success of the Auto calibration
routine and could be compromised by the following: instrument air supply, volume
capacity, actuator sizing, tubing size and actuator/valve health.
ICoT 5000 Optional High Flow design is suitable for actuator swept volumes of a
minimum 200 inch
3
(3.2 liters) to a maximum of 1000 inch
3
(16.30 liters) for proper Auto
Calibration functionality. It should also be noted that this is to be used as a general
guideline only. The actuator/ valve package dynamics would dictate the success of the
Auto calibration routine and could be compromised by the following: instrument air
supply volume capacity, actuator sizing, tubing size and actuator/valve health.