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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 and
the assigned analog output (current) value (see Table 8) will be set. For instance, in 2-color mode, if the
internal ambient temperature is over the limit and the attenuation is to high too, the unit outputs
EIHH to the temperature display and sets an analog output current of 21 mA on the analog current
loop output lines. However, since 2-color wide band and narrow band temperatures may all be
presented simultaneously through RS485 or LAN / Ethernet interface, their over and under range
conditions are independent.
Following order shows the priorities of the possible failsafe conditions:
1. Heater control temperature over range
2. Heater control temperature under range
3. Internal temperature over range
4. Internal temperature under range
5. Wide band detector failure
6. Narrow band detector failure
7. Energy too low
8. Attenuation too high (> 95%)
9. Attenuation > 95% ("dirty window")
10. Two-color temperature under range
11. Two-color temperature over range
12. Wide band temperature under range
13. Wide band temperature over range
14. Narrow band temperature under range
15. Narrow band temperature over range
Examples of failsafe conditions:
1.
2.
ENDURANCE 1R
info@Raytek-Direct.ca
One-color temperature is selected to show on the temperature display. Two-color temperature
is transmitted in burst mode. Wide band temperature is under range. Two-color temperature
is 999°C.
Outputs:
Temperature Display:
RS485 or LAN/Ethernet:
Analog Output:
Relay:
Two-color temperature is selected to show on the temperature display. All three temperatures
are transmitted in burst mode. Two-color temperature is 1021.0°C. Wide band temperature is
703.0°C. Narrow band temperature is 685.0°C. Attenuation is above 95%, the "dirty window"
threshold.
Outputs:
Temperature Display:
RS485 or LAN/Ethernet:
Analog Output:
Relay:
EUUU
C T999.0
2 to 3 mA
abnormal state
1021.0
C T1021.0 W703.0 N685.0
scaled to temperature, between 4 and 20 mA
abnormal state
Rev. E1 Sep 2015
Maintenance
highest priority
lowest priority
1.800.868.7495
57
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