MANUAL PSM01

AGx Models Adjusting the Zero and Span
To set one of these models for RA operation, reverse
the control wiring connections at Terminal 2 and
Terminal 3. (See Terminal Block 1 in Figure 5.)
To adjust the zero and span potentiometers on the
HGx models:
1. Verify that Jumper W2 is in the 0 to 10 VDC
position, and provide 24 VAC or 24 VDC power to
Terminal 1 (Common) and Terminal 2.
GGx, HGx, and JGx Models
To set one of these models for RA operation, proceed
as follows:
2. Connect the Common from the controller to
Terminal 1, and either a voltage signal to
Terminal 5 or a current signal to Terminal 4.
1. Press and hold the gear release, rotate the
actuator coupler until it is in the full CW position,
and release the gear release.
3. Connect Terminal 1 and Terminal 3 to a voltmeter
to monitor the calibration output.
2. Move Jumper W1 from the factory-set DA position
to the RA position. (See Figure 8.)
4. Use a 1/8 in. (3 mm) flat-blade screwdriver to turn
the zero potentiometer fully CW and the span
potentiometer fully CCW.
3. Apply power and then a control signal to the
actuator to verify that the actuator is fully CW at
minimum control input, and fully CCW at maximum
control input.
5. Apply the minimum (zero point) control signal
required for positioning the actuator at the
minimum position.
Note: HGA and HGC models may require
potentiometer settings. Proceed to the Potentiometer
(HGx Models) section.
6. Monitor DC calibration output. To adjust the
zero potentiometer, turn it CCW until the voltmeter
displays 0 V or slightly less.
Jumpers
7. Adjust the control signal to the maximum voltage
desired to cause full rotation.
AGx models come factory set with the Master/Slave
Jumper in the master position and have no additional
jumpers. GGx, HGx, and JGx models come factory
set with Jumper W1 in the DA position. GGx and
HGx models have additional jumpers factory set as
follows: Jumper W2 is in the 0 to 10 VDC or
0 to 20 mA position, and Jumper W4 is in the
0 to 10 VDC position. (See Figure 8.)
8. Monitor the calibration output at Terminal 1 and
Terminal 3. Adjust the span potentiometer CW to
increase the calibration output to 10 V.
9. Verify that the actuator is properly calibrated by
adjusting the control signal to the minimum and
maximum levels.
Example for a zero of 3 VDC and a span of 5 VDC:
Note: HGx models have an additional jumper,
Jumper (W3), factory set in the fixed position. The
AGx models do not have jumpers.
• Apply a 3 volt control signal to the actuator, and
turn the zero potentiometer CCW until the
calibration output at Terminal 3 is 0 V.
Potentiometers (HGx Models)
• Apply maximum voltage. (In this case, it is 8 VDC,
which results in a span of 5 volts.)
IMPORTANT: Adjust both zero and span
potentiometers for full actuator travel and complete
calibration.
• Monitor calibration output at Terminal 3, and
adjust the span potentiometer CW to 10 V.
The HGx models have zero and span potentiometers
that do not require adjustment when Jumper W3 is
factory set in the fixed position. When Jumper W3 is in
the Adjustable (ADJ) position, without waiting for the
actuator to drive to the final position, proceed as
follows:
Auxiliary Switches (xGC Models)
The M91xx-xGC models have two built-in
auxiliary switches that allow setting at any angle
between 0 and 90° (factory set for 10 and 80°,
nominal). Refer to the Technical Specifications section
for auxiliary switch ratings.
Adjust the zero and span potentiometers using either
Terminal 3 and Terminal 5 or Terminal 3 and
Terminal 4, a control signal, and a voltmeter.
The following procedures serve as examples to
change the position of the auxiliary switch angles:
6 M9108, M9116, M9124, and M9132 Series Electric Non-Spring Return Actuators Installation Instructions