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Skymetry WTU-14 Manual
For Dry Contact inputs, momentarily reverse the input condition
to verify that the unit recognizes the change of state. For example,
if you have a normally open sensor connected to Dry Contact #1,
force that sensor closed and verify that the unit displays the value as
closed.
For analog inputs, verify that the input reading matches the entity
being measured. For example, for temperature inputs confirm that
the unit is reporting the correct temperature.
For 4–20mA inputs, confirm that the level or value being displayed
in the WTU-14 matches the actual conditions being measured.
Output Testing
Confirm that the power limitations of the outputs will not be
exceeded. The WTU-14 outputs are rated for a maximum of 0.3A
at 120VAC or 1.0A at 24VDC. Test the outputs by switching them
on and off manually and confirming that the device being controlled
turns on and off. The Output LEDs on the front of the unit should
also turn on and off.
Control Programming
For applications that utilize control programming it is important
to test all scenarios that may affect system operation. This means
you should test your system under normal operating conditions as
well as abnormal (or failure) conditions to make sure that you have
designed your system to operate under the worst-case scenario.
Note that Local and Machine-to-Machine control will not execute
while you are connected locally.
To test Local control operation, force input conditions as necessary
to activate the output(s). Confirm that the input-to-output control
logic is executing properly. Test each programmed control algorithm
separately to make sure that each one is functioning as desired.
To test Machine-to-Machine control, force input conditions as nec-
essary to activate the output(s) on your remote WTU-14 device(s).
Confirm that the outputs on the remote unit(s) have turned on or off
as instructed. Test each programmed control algorithm separately
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