Advanced Power technologies TTC-1000 Instruction & Operation Manual page 78

 Failure of both top oil RTD probes where the TTC-1000 is configured for
redundant top oil probe operation.
This function will not be invoked for failure of bottom oil, ambient or any LTC tank
probes.
The user should decide how they wish each output to operate whenever there is
either a DEVICE or TPROBE alarm. For example if OUT1 and OUT2 control two
separate banks of fans, it might be desirable to have OUT1 and OUT2 pickup as
soon as a DEVICE or TPROBE alarm occurs. This insures that the fans are
running even though there might be a device or temperature probe failure.
NOTE: It is strongly recommended to set output control to supervised
(SUPVS) for all outputs controlling cooling fans in fail-safe mode.
However, if OUT3 is used for a trip signal, it may be desirable to use the DEVICE
or TPROBE alarm to supervise OUT3. This will insure that a trip signal is blocked
whenever a DEVICE or TPROBE alarms occur.
Also, if OUT4 is used for a high temperature alarm, it may be desirable for OUT4
to remain unchanged if a DEVICE or TPROBE alarm occurs. This will insure that
a high temperature alarm continues to be reported.
Programming from the front panel, press the
076 is displayed:
Press the YES button. The first character will flash. Use the
to scroll between PCKUP, SUPVS or UNCHG.
Press YES when you have made the correct selection.
For programming from a PC just type the setting for Output Control with Alarm on
the "Enter:" line as follows:
This will set OUT1 supervised with a Device or Temperature Probe Alarm. Type
1 to pickup OUT1 with a Device or Temperature Probe Alarm, or 0 to leave the
output unchanged with a Device or Temperature Probe Alarm.
Consult the setting sheets to change output control for OUT2, OUT3, OUT4,
OUT5, and OUT6.
PRGM SETTING 076
OUT 1UNCHGw/ALRM
PRGM SETTING 076
OUT 1SUPVSw/AL RM
Enter:76/2
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