10
Series 70 Servo Pro
Operation and Maintenance Manual
Appropriately sized surge suppressors should
be installed whenever inductive loads such as
transformers, relays, solenoids, motors, etc. are
operated. This will help prevent transient EMI surges
from damaging the sensitive electronic circuits.
H. Apply the appropriate supply voltage to the
power input terminals.
a. Verify the Status LED is flashing normal
operation – a green “heartbeat” consisting
of a repeating pattern one second on and
one second off.
b. If the Status LED is flashing red, the problem
must be resolved before Calibration can begin.
Refer to the Troubleshooting section of this
manual and the Status Code Flash Table for
more information.
I. Accept or Adjust the Deadband - Optional
a. The factory default is midrange – the deadband
potentiometer is midway between fully
clockwise and fully counter-clockwise. If this is
acceptable, no further adjustment is necessary.
b. Rotate the deadband potentiometer clockwise
to increase the deadband.
c. Increasing the deadband reduces the
potential for the actuator to oscillate around
the desired setpoint. This oscillation is often
called “hunting.” An actuator responding
to a moving setpoint is not hunting, but is
operating properly.
d. Decreasing the deadband allows the actuator
to reach a position closer to the desired
position, as long as the actuator does not
oscillate (hunt) around the setpoint.
J. Accept or Adjust the Open Speed - Optional
a. The factory default is full speed – the open
speed potentiometer is in the fully counter-
clockwise position. If this is acceptable, no
further adjustment is necessary.
b. The full speed (fastest speed) of the actuator
is listed on the label.
c. Rotate the open speed potentiometer
clockwise to reduce the opening speed of
the actuator.
d. Reducing the opening speed of the actuator
can allow more precise positioning of the
actuator.
K. Accept or Adjust the Close Speed - Optional
a. The factory default is full speed – the close
speed potentiometer is in the fully counter-
clockwise position. If this is acceptable, no
further adjustment is necessary.
b. The full speed (fastest speed) of the actuator
is listed on the label.
c. Rotate the close speed potentiometer
clockwise to reduce the closing speed of the
actuator.
d. Reducing the closing speed of the actuator can
allow more precise positioning of the actuator.
NOTICE
Reducing the closing speed of the actuator can also
reduce the potential of water hammer damage.
Electric actuators are usually slow enough to avoid
water hammer even at the full speed setting – but
the user should verify this setting.
Shielding
Signal/communication lines should be shielded.
Shield must be grounded at one end only, preferably
at the controller. Grounding the shield at more than
one location can introduce noise in the circuitry by
forming ground loops.
L. Connect the Output Signal to the process
controller - Optional
a. Wire the positive conductor to the OUTPUT
(+) terminal.
b. Wire the negative conductor to the OUTPUT
(-) terminal.
c. Select the desired output signal range using
the Configuration switches 4, 5 and 6.
M. Connect the Anti-Condensation Heater –
Optional
a. Connect the wires from the Anti-Condensation
Heater to the HEATER terminals.
b. The Heater rating must match the voltage
rating of the Servo Pro.
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