TM 10-4320-344-24
Ensure that all wires and external connections are disconnected from process
control device prior to performing this test. Failure to disconnect all
external connections may resulting damage to process control device.
Refer to figure 2-89 for location of identified terminals in the following
s t e p s.
a.
b .
c .
d.
e .
f .
g.
Ensure all external connections and wires leading to and from process control
device are disconnected.
Connect 12 or 24 VDC power source to terminals 1 (+) and 2 (-).
A 10K resistor must not be connected if low or high output impedance is used.
If low-signed selected output is used, connect 10K resistor from terminal 16
to terminal 10.
If high-signed select setting is selected, connect 10K ohm resistor from
terminal 16 to terminal 17.
Set droop gain and low-limit potentiometers to full counter-clockwise (CCW)
p o s i t i o n.
Set high-limit direct control point and inverse control point potentiometers
to fully clockwise (CW) position.
Measure output voltage from terminal 16 (+) to terminal 17 (-) to verify that
output voltage is -0.5 ± 1.0 VDC.
If process control device output voltage ramps properly but process control
device is still operating incorrectly, check system for correct wiring. Examine
other components in system for correct operation. Verify that input sensing
device is wired to correct terminals necessary for the desired controlling
action (inverse or direct).
h .
Quickly rotate inverse control point adjustment to fully CCW position.
Output should slowly ramp up to 9.4 ± 2.0 VDC. If the output is not within
this range, the unit is defective.
i .
Replace defective process control device.
2.16.33.4 Installation.
Install wires on screw located at bottom right mounting point of process
control device.
a .
Position process control device (Figure 2-88, 3) on control panel (8) and
secure with four screws (7), new lock washers (6), and nuts (5). Remove and
discard tags.
b .
Install wires (2) on process control device (3) with screws (1). Remove and
discard tags.
2-219
NOTE
NOTE
NOTE
NOTE
