RayTek Thermalert GP series User Manual

28 Thermalert GP Series Operator’s Manual
3.2 FAIL-SAFE OPERATION
The Fail-Safe system is designed to alert the operator and provide a safe out-
put in case of any system failure. Basically, it is designed to shutdown the
process in the event of a set-up error or a failure in the sensor head or control
electronics.
When an error or failure does occur, the display indicates the possible failure
area, and the output circuits automatically adjust to their lowest or highest
preset level (as shown in the Table 8).
Table 8: Fail-safe Error Codes
20mA
4mA
4mA
4mA
4mA
E111
E000
E444
E555
E666
Over instrument input range
Under instrument input range
Head disconnect
Head ambient temperature
GPM: >85°C (185°F)
GPR/GPS: >65°C (150°F)
Monitor ambient temperature
>50°C (120°F) or <0°C(°F)
High value of
input range
Low value of
input range
Low value of
input range
Low value of
input range
Low value of
input range
DISPLAY CODE
(flashing)
CONDITION MA OUTPUT
T.C. OUTPUT
Note: With either input type H003 or H004 the under instrument input range will
display low scale for the input device, and the output will be 4mA.
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RayTek Thermalert GP series Specifications

General

Brand	RayTek
Model	Thermalert GP series
Category	Measuring Instruments
Language	English