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Start-up
-5-
1) Power.
Before applying AC power to TB2 set slide
switch to the correct voltage (120/240Vac)
2) Command Calibration.
This procedure calibrates the
minimum and maximum command to the unit.
A) Set command signal to low level, normally 4 mA.
B) For AD-8140 amplifiers, depress ZERO
pushbutton (S1) and LOS pushbutton (S4) until
the SPARE LED illuminates. For AD-8240 amplifi-
ers, depress ZERO pushbutton (S1) and LOS
pushbutton (S4) until the LOS LED flashes.
C) Set command signal to high level, normally 20 mA.
D) For AD-8140 amplifiers, depress SPAN
pushbutton (S2) and LOS pushbutton (S4) until
the SPARE LED illuminates. For AD-8240 amplifi-
ers, depress SPAN pushbutton (S2) and LOS
pushbutton (S4) until the LOS LED flashes.
3) Auto/Manual (Option). If the unit has the Auto/
Manual switch option, place it in the auto position.
4) Setpoints.
These are the end of travel extremes
corresponding to the actuator output shaft positions
for low (4mA) and high (20mA) command signal
levels. They are set by the ZERO and SPAN
pushbuttons and adjusting knob. All settings require
the holding of a push button and the turning of the
adjusting knob.
A) Set the command signal to lowest level,
normally 4mA.
B) Adjust LO setpoint (ZERO) by holding ZERO push
button (S1) and turning adjusting knob to move
actuator output shaft to desired position. Turn
the adjusting knob CW to extend the ouput shaft
for linear actuators, or rotate the output shaft
CW for rotary actuators. Turn the adjusting knob
CCW to retract the ouput shaft for linear actua-
tors, or rotate the output shaft CCW for rotary
actuators. Release button.
C) Set the command signal to highest level,
normally 20mA.
D) Adjust HI setpoint (SPAN) by holding SPAN push
button (S2) and turning adjusting knob to move
actuator output shaft to desired position. Turn the
adjusting knob CW to extend the ouput shaft for
linear actuators, or rotate the output shaft CW
for rotary actuators. Turn the adjusting knob
CCW to retract the ouput shaft for linear actua-
tors, or rotate the output shaft CCW for rotary
actuators. Release button.
Start-Up
5) Transmitter.
This adjustment sets the endpoints of
the 4-20 mA transmitter to account for variations in
accuracy of the input command.
A) Set command signal to low level, normally 4 mA.
B) For AD-8140 amplifiers, depress ZERO
pushbutton (S1) and LOS pushbutton (S4) until
the SPARE LED illuminates. For AD-8240
amplifiers, depress ZERO pushbutton (S1) and
LOS pushbutton (S4) until the LOS LED flashes.
While depressing pushbuttons, turn adjusting
knob CW to increase the 4 mA point, or CCW to
decrease the 4 mA point.
C) Set command signal to high level, normally
20 mA.
D) For AD-8140 amplifiers, depress SPAN
pushbutton (S2) and LOS pushbutton (S4) until
the SPARE LED illuminates. For AD-8240
amplifiers, depress SPAN pushbutton (S2) and
LOS pushbutton (S4) until the LOS LED flashes.
While depressing pushbuttons, turn adjusting
knob CW to increase the 20 mA point, or CCW
to decrease the 20 mA point.
6) Deadband.
This adjustment establishes the actuator
servo sensitivity. It is factory set at 1% and should not
be field adjusted. If the actuator begins to oscillate
(Green and Yellow LEDs turn on and off rapidly),
decrease the sensitivity by holding deadband push
button (S3) and turning adjusting knob CW until
oscillation stops. Release button.
Oscillations will result in decreased life of the
unit. Consult Factory.
7) Loss of Signal Preset.
This adjustment establishes
the position to which the actuator will travel upon a
loss of command signal condition. To activate this
setting, SW3 must be OFF. Adjust the setting by
holding the LOS push button (S4) and turning the
adjusting knob to set the preset position. Turn the
adjusting knob CW to extend the ouput shaft for
linear actuators, or rotate the output shaft CW for
rotary actuators. Turn the adjusting knob CCW to
retract the ouput shaft for linear actuators, or rotate
the output shaft CCW for rotary actuators.
8) Verify all settings
by running the actuator through its
travel range several times.
