Unswitched Circuits; Switched Circuits - Pentair raychem ngc-30/uit2 Programming Manual

3.3.19.2 unsWitChed CirCuits

Fig. 3.27 An unswitched PLI-TT circuit test in progress
Using this utility on an unswitched circuit will configure the UIT2 to continuously poll the PLI
approximately every second. With a theoretical maximum time of 11 minutes between SES/SPC
transmission times, 660 test cycles should result in SES/SPC temperatures being reported if there
are no errors or issues with communication.
TT sensors, on the other hand, will each sequentially report their temperatures to the PLI.
Therefore, TTs should always report a temperature for each test cycle.

3.3.19.3 sWitChed CirCuits

Fig. 3.28 A PLI-SES switched circuit test in progress
If the tester utility is used on a switched circuit, the UIT2 will force the controlling relay on to
power the sensors.
If the circuit is using SES/SPC sensors and is already on, the UIT2 will switch the circuit off and
then immediately back on to force the SES/SPC sensors to report their temperatures. This will
occur every test cycle. The time required for each cycle will depend on the SES/SPC address
numbers on the circuit since each sensor will report their temperatures at a specific time after
power up based on its address. A countdown timer will be displayed to indicate when the next test
cycle will occur.
If TT sensors are being used, temperatures will be updated on the UIT2 every second after the
circuit is forced on.
industrial heat tracing solutions EN-RaychemNGC30UIT2Programming-AR-H58186 02/16 49 / 84