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Controller operation
Main Menu
5.2.1.1.3 STABLE ALARM
The audible alarm described in STABLE LIMIT is turned on or off using the STABLE
ALARM parameter. Select the either “Enable” or “Disable” using the left or right ar-
row keys and press “ENTER” to accept the selection.
5.2.1.2 CUTOUT
The view CUTOUT contains the Cutout functions of the instrument.
5.2.1.2.1 SOFT CUTOUT
The SOFT CUTOUT is user settable. As a protection against software or hardware
fault or user error, the block is equipped with the adjustable cutout device that shuts
off power to the heat source if the well temperature exceeds a set value. It is factory
set as a default ten degrees above the high limit of the instrument. The user should
set the Soft Cutout according to the temperature limits of the probes being calibrated.
The Soft Cutout can act as a safety barrier to protect probes from being over heated
to temperatures beyond their specied temperature limits if the Soft Cutout is set ap-
propriately for probes under test. This feature protects the instrument and probes from
excessive temperatures.
If the cutout is activated because of excessive well temperature, power to the heat
source shuts off and the instrument cools. The heat source remains in cutout mode
and active heating and cooling is disabled until the user manually resets the cutout. If
the over-temperature cutout has been triggered, the instrument displays “CUTOUT”
above the duty cycle bar graph, which indicates a cutout condition. The instrument
remains in cutout mode until the temperature is reduced and the cutout is reset. The
well temperature must drop a few degrees below the cutout set-point before the cutout
can be reset.
For safety reasons, the cutout only has one mode — manual reset. Manual reset mode
means the cutout must be reset by the operator after the temperature falls below the
set-point.
The SOFT CUTOUT parameter can be set to any temperature over the range of the
instrument. The cutout should be set within 5-10° of the safety limit of the equipment
being calibrated or used with the Field Temperature Block.
NOTE: CUTOUT RESET: If the Field Temperature Block exceeds the
temperature set in the soft cutout menu or if it exceeds the maximum operating
temperature of the instrument, a cutout condition occurs. If this happens, the
instrument enters cutout mode and will not actively heat or cool until the user
resets the instrument.
To reset the cutout, the instrument temperature must cool to lower than the cutout set-
point. Once the instrument has cooled the user may reset the instrument by pressing
“SET PT.” and pressing “ENTER” to engage instrument.
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