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When the soft cutout turns off power to the furnace,
CUTOUT shows in the display. The Product stays in this
condition until the temperature of the furnace goes below
the cutout temperature and the setpoint is set again.
Hard Cutout
The Hard Cutout disables the heaters if the control
thermocouples sense that the furnace temperature is
above a factory-set limit. It also cuts out if a control
thermocouple is open-circuit or disconnected.
The hard cutout temperature is set at the factory and can
be seen through the user interface. This is not a user-
accessible parameter. When the hard cutout turns off
power to the furnace, the temperature must decrease a
few degrees below the hard cutout temperature to reset.
Chassis Thermostat Cutout
The Chassis Thermostat Cutout turns off power if the
chassis temperature is too hot. The power stays off until
the temperature of the chassis decreases a few degrees
below the cutout temperature. This is not a user-
accessible adjustment.
Fan Fault Cutout
The Fan Fault Cutout turns off power to the furnace when
a fan fails. The furnace stays off until the fan is repaired.
TC or Heater Fault Cutout
The TC Fault Cutout turns off power to the furnace when
the product senses there is a problem with a control probe
or a heater. This protects the Product when a control
probe comes out of its socket or a wire in one of the
probes opens. This cutout also turns off the furnace if it is
in the heat mode and the temperature of the furnace does
not increase. When this cutout turns off furnace power, TC
OR HEATER FAULT! shows in the display. The probe or
heater must be repaired or replaced to reset this cutout.
Remote Operation
Remote operation of the Product from a PC or computer is
done with commands through the remote interface. The
command set will let you set setpoint temperatures,
monitor furnace temperature, get measurement data, and
control furnace operation. This section contains the
procedures to set up, configure, and operate the Product
through the remote interface.
The Product is controlled with Standard Commands and
Programmable Instruments (SCPI) commands. The SCPI
command set and how the Product implements those
commands is included in the SCPI Commands section of
this manual.
Calibration Furnace
Remote Operation
35
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