HKC HQ-006, Инструкция по установке, эксплуатации и обслуживанию

Страница: 8 / 22

HQ-006 Quarter-turn Electric Actuator
Installation Operation& Maintenance Manual
Doc No. : HumA-HQ006-21 Rev1 Page 8 / 22 Valve Automation Leader, HKC
Anti-vibration type General use
4.4. Setting Potentiometer (Replacement and Setting)
The potentiometer has been calibrated at factory. However, if re-calibration is required, proceed as follows:
4.4.1. Manually rotate the hand wheel of the actuator to fully closed position.
4.4.2. While measuring the resistance between P1 (orange) and P2 (grey), gently rotate the Potentiometer
Gear until it reaches between 80 - 120 Ω (100 Ω preferred).
4.4.3. Engage the Potentiometer Gear into the Point Shaft Gear and use an L-wrench to tighten the screw.
4.5. Current Position Transmitter – CPT (Optional)
The potentiometer is used for the actuator signal feedback. It reads a resistance value corresponds to the
current position of the actuator and transfers to CPT card. The CPT indicates the current position of the
actuator throughout the stroke by a 4 – 20mA output signal.
4.5.1. Standard Features
Model CPT
Power 220(110)V ac, 50/60Hz, 2VA Max
Output Signal 4~20mA dc
Output Impedance 750Ω Max
Resolution Min 1/1000
Position Conversion Accuracy
±
0.5 ~
±
1.5%
Ambient Temperature -20 ℃ to +60 ℃
Ambient Humidity 90% RH Max (at Non-condensing condition)
Insulation Resistance Above 500V dc 30MΩ
Vibration 10g, 0~34Hz
4.5.2.
4.5.3. 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 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.
Potint shaft Potentiometer gear
Point shaft
Potentiometer
JP-30B(
1kΩ±0.5%)
Limit switch
[P3 P2 P1 --- 16Rev1]