Endurance® Series
Users Manual
90
11.2.1. Fail-Safe Error Codes (displayed or transmitted via electrical interface)
When an error or failure does occur, the temperature display indicates the possible failure area,
and the output circuits automatically adjust to their lowest or highest preset level. The following
table shows the values displayed on the 7-segment temperature display and transmitted over
the RS485 or LAN / Ethernet interface.
Table 11: Fail-safe Error Codes
Heater control temperature over range
Heater control temperature under range
Internal temperature over range
Internal temperature under range
Wide band detector failure
Narrow band detector failure
Attenuation too high (>95%)***
Attenuation too high >95%
("dirty lens", relay will go to “alarm” state)***
2-Color temperature under range
2-Color temperature over range
Wide band temperature under range
Wide band temperature over range
Narrow band temperature under range
Narrow band temperature over range
* only available via RS485 or LAN / Ethernet command
** Wide and narrow band stands for the first and the second wavelength in 2-Color mode
*** Note that the activation levels for these conditions may be set to different values.
(e.g., "dirty lens" at 95%, EAAA at 98%)
11.2.2. Analog Output current values in dependence of Fail-Safe Error Codes
The relay is controlled by the temperature selected on the display. If any failsafe code appears
on the display, the relay changes to the “abnormal” state. The exception is the “dirty window”
condition. This causes the relay to change state, leaving a normal numerical temperature
output.
Table 12: Current Output Values in accordance to an Error
If two or more errors occur simultaneously, the error with the highest priority overrules the lower
priority errors. The highest priority error will be displayed on the 7-segment temperature display
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