18
BAS-SVX45F-GB
Tracer UC600 Pre-power Checks
To avoid equipment damage, a pre-power check for inputs and outputs is recommended before
applying power to the Tracer UC600.
Before applying power, check for the following:
•
All thermistors; check for 10K by using a digital multimeter (DMM).
•
Thumbwheels; range between 189
Ω
and 890
Ω.
•
Binary outputs; check for any dead shorts.
•
Analog outputs; verify that AC voltage is not present and that the load does not have 24 VAC
or 230 VAC.
This section provides illustrations and methods of how to check the Tracer UC600 points before
connection has been made and power applied. The step numbers in each illustration correspond
to the information in each table. (Refer to
for a list of device connections.)
Note:
The illustrations in the section,
“Commissioning/Troubleshooting in a Powered State,” p. 66
show the location of the UC600.
Resistive Inputs
Checkout Procedure
Measurement
Expected Value
Step 1
Measure AC voltage across the resistive termination.
VAC
≈
0.0 V
AC voltage will affect further measurement.
Step 2
Measure DC voltage across the resistive termination.
VDC
≈
0.0 V
DC voltage will affect further measurement.
Step 3
Measure the resistance across the resistive termination.
Compare the measured resistance with the
expected value based on the manufacturer’s
specification and current conditions.
