U2 COMBINATION VIEWING HEAD AND SIGNAL PROCESSORS
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com
® U.S. Registered Trademark
© 2013 Honeywell International Inc.
66-2071—02 M.S. Rev. 07-13
Printed in United States
Tests
1.
Remove power to the signal processor and, using a
multimeter, ensure there is no continuity between the
relay common and self check wires (see chart below for
color codes).
2.
Reapply power to the signal processor and, using a
multimeter, ensure continuity between the relay com-
mon and self check wires.
3.
Use a light source to generate a flame on condition and,
using a multimeter, ensure continuity between the relay
common and flame relay wires.
4.
Remove any light source to generate a flame off condi-
tion and, using a multimeter, ensure there is no continu-
ity between the relay common and flame relay wires,
after the FFRT (Flame Failure Response Time) has
elapsed.
5.
Measure the current draw of the U2 and ensure it is less
than 120 mA.
6.
Change one of the settings of the signal processor and
store the changed setting. Remove power to the signal
processor for 10 seconds. Restore power to the signal
processor and ensure the stored value has remained
unchanged.
7.
Use your light source to generate flamecounts of
between 1200 and 2600 in the signal processor. Note
the flamecount.
a. Increase the gain and store the setting. Ensure the
flamecount increased.
b. Decrease the gain and store the setting. Ensure the
flamecount decreased.
8.
Restore all original settings as recorded in Setup and
reconnect the signal processor to the safety system.
Product Decommissioning
When required, decommissioning of the Uniscan 2
flamescanner should be performed in accordance with
requirements of the overall safety system.
