Precision Control Systems ProfileIR 4069P - Manual (Page 21)

Model 4069 ProfileIR TM User Manual Operation
Research, Inc. 18
ALARMS
SCREEN
The ALARMS screen displays the status of each of the alarms. The
dashed line (-----) indicates no alarm. Alarms are of one of two types,
either a Critical or a Minor alarm. A Critical alarm will turn the
system to off, dropping out the heater contactor. It is due to an
abnormal condition that could damage equipment or harm personnel.
A Minor alarm puts the system in a waiting state where the power level
to the heaters is changed to 0%; once the condition has cleared the
power level returns to the pre-alarm level.
OVER TEMPERATURE The Over Temperature alarm is a Critical
alarm. A thermostat inside the 4069 Chamber heater monitors the
reflector temperature, when the preset value is exceeded the system
alarms and shuts down.
COOLANT FLOW The Coolant Flow alarm is a Critical alarm. A
flow switch on the system monitors the coolant flow through the 4069
Chamber heater. If it does not meet a minimum value or .25
gallon/minute (gpm) it will alarm and shut the system down. Note: A
flow rate of .25 gpm is significantly less than the heater requirement of
1.2 to 6.2 gpm depending on the heater. Inadequate coolant flow can
be a cause for the Over Temperature alarm.