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HQ Series Quarter-turn Electric Actuator
Installation Operation& Maintenance Manual
Doc No. : HumG-HQ-21 Rev2
Page 11 / 26
Valve Automation Leader, HKC
Anti-vibration type
General type
4.8.2.
Calibration of Zero and Span – CPT
The settings of Zero and Span have been
calibrated at the factory. However, if re-
calibration is required, proceed as follows:
①
Apply power (or use the manual override) to
drive the actuator to its fully closed position
(clockwise rotation).
②
When the actuator is in the fully closed
position, adjust the ZERO dial on the CPT
board until a reading of 4mA is achieved.
③
Apply power (or use the manual override) to
drive the actuator to its fully open position
(counter-clockwise rotation).
④
When the actuator is in the fully open
position, adjust the SPAN dial on the CPT
board until a reading of 20mA is achieved.
4.9.
Proportional Control Unit
[Never welding should be done while the power line is connected to the actuator. Electrical shock
can cause serious damage to the microprocessor of the actuator. ----- 17 Rev1]
4.9.1.
[PCU EB-V1.5D for AC, Optional
Front
Back
4.9.2.
[PCU DC-V2.1C for DC, Optional
Front
Back