H
H
L
L
-
-
S
S
e
e
r
r
i
i
e
e
s
s
E
E
l
l
e
e
c
c
t
t
r
r
i
i
c
c
A
A
c
c
t
t
u
u
a
a
t
t
o
o
r
r
I
I
n
n
s
s
t
t
a
a
l
l
l
l
a
a
t
t
i
i
o
o
n
n
a
a
n
n
d
d
O
O
p
p
e
e
r
r
a
a
t
t
i
i
o
o
n
n
M
M
a
a
n
n
u
u
a
a
l
l
H
H
K
K
C
C
27
4.7
Current Position Transmitter
The potentiometer used for the actuator signal feedback
The potentiometer reads the actuator’s current position and transfers a resistance value to a current position
transmitter card. The CPT indicates the actuator position throughout the stroke by a 4~20mA output signal.
4.7.1 Standard Features
Model
CPT
Power
220 (110) VAC , 50/60Hz 2 VA Max
Output Signal
4-20mA DC Load Resistance 750
Ω
Max
Resolution
Min 1/1000
Position Conversion Accuracy
+/- 0.5 ~ +/- 1.5%
Ambient Temperature
-20 ~ + 70 Degrees C
Ambient Humidity
90% RH Max (Non Condensing)
Dielectric Strength
1500 VAC 1 min
(Input to Output to Power Ground)
Insulation Resistance
Above 500 VDC 30M
Ω
Vibration and Shock
Caution :
HAZARDOUS VOLTAGE. Turn off all power before setting your actuator.
4.7.2
Calibration Zero Span - CPT
The zero~span setting has been calibrated at the factory. However if re-calibration is required, proceed as follows:
Use the manual override to drive actuator to 50% open position (anti-clockwise).
Apply power to drive actuator to its true closed position (clockwise rotation).
When the actuator is in the true closed position adjust the
”zero” on the CPT board
until a reading of 4mA is achieved
Apply power (or use manual override) to drive the actuator to its true open position.
When the actuator is in the true open position adjust the “span” on the CPT board
until a reading of 20mA is achieved.