Emerson UVU-140A User Manual
12
Table 3 - Coil and Relay Status
COIL AND RELAY SETTINGS TABLE
Switch 1
Switch 2
De-energized and
non-latching
non-latching
ON
ON
Energized and non-
latching
latching
ON
OFF
De-energized and
latching
latching
OFF
ON
Energized and
latching
latching
OFF
OFF
CHAPTER 3 START UP AND TEST
Start up Procedure
NOTE:
Be sure that the detector is correctly aimed at the potential hazard and that no obstructions interfere
with its line of vision. UV absorbing gases should not exist between the detector and the potential
hazard.
with its line of vision. UV absorbing gases should not exist between the detector and the potential
hazard.
Check Out Procedure
CAUTION:
When testing the system, be sure to secure all output devices to prevent unwanted activation of equipment
and remember to place the same devices back into service when the check-out is complete.
and remember to place the same devices back into service when the check-out is complete.
Automatic vi Test
NOTE:
The automatic vi system continuously monitors the operation of the detector. However, it is important
that the system be manually checked using the MANUAL check procedure (described on page 12) on a
regular basis. The whole system (including external equipment) should be checked periodically using a
UV test lamp to simulate a fire.
that the system be manually checked using the MANUAL check procedure (described on page 12) on a
regular basis. The whole system (including external equipment) should be checked periodically using a
UV test lamp to simulate a fire.
The detector performs an automatic vi test every 30 seconds. If the automatic vi test fails, the
UVU-140-A or UVU-140-AR current output will decrease to 2mA indicating a dirty window or other obstruction
in front of the detector tube. The UVU-140-A or UVU-140-AR current output will remain at 2mA until the
problem is corrected. If the obstruction was only temporary, the detector will return to normal operation with a
current output of 4mA the next time the automatic vi test is successful.
UVU-140-A or UVU-140-AR current output will decrease to 2mA indicating a dirty window or other obstruction
in front of the detector tube. The UVU-140-A or UVU-140-AR current output will remain at 2mA until the
problem is corrected. If the obstruction was only temporary, the detector will return to normal operation with a
current output of 4mA the next time the automatic vi test is successful.