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RayTek FR Thermometer User Manual

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Maintenance

46 MarathonSeriesFA/FR

10.2Fail‐SafeOperation

TheFail‐Safesystemisdesignedtoalerttheoperatorandprovideasafeoutputincaseofanysystem

failure.Basically,itisdesignedtoshutdowntheprocessintheeventofaset‐uperror,systemerror,or

afailureinthesensorelectronics.



The Fail‐Safecircuit should neverbe reliedonexclusively toprotect criticalheating

processes.Othersafetydevicesshouldalsobeusedtosupplementthisfunction!

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. Thefollowing table shows the

valuesdisplayedontheLEDdisplayandtransmittedoverthe2‐wayinterface.

Symptom Error Code

Priority

Heater control temperature over range ECHH 1 (high)

Heater control temperature under range

ECUU 2

Internal temperature over range EIHH 3

Internal temperature under range EIUU 4

Temperature under range EUUU 5

Temperature over range EHHH 6 (low)

Table9:ErrorCodesin1‐ColorMode(FA models)

Condition 2-Color 1-Color

(wide band)**

1-Color*

(narrow band)**

Priority

Heater control temperature over range ECHH ECHH ECHH 1 (high)

Heater control temperature under range ECUU ECUU ECUU 2

Internal temperature over range EIHH EIHH EIHH 3

Internal temperature under range EIUU EIUU EIUU 4

Wide band detector failure EHHH EHHH <temperature> 5

Narrow band detector failure EHHH <temperature>

EHHH 6

Energy too low EUUU <temperature>

<temperature> 7

Attenuation too high (>98%) EAAA <temperature>

<temperature> 8

Attenuation too high >95%

("dirty lens", relay will go to “alarm” state)

<temperature>

<temperature>

<temperature> 9

2-color temperature under range EUUU <temperature>

<temperature> 10

2-color temperature over range EHHH <temperature>

<temperature> 11

1-color temperature (wide) under range <temperature>

EUUU <temperature> 12

1-color temperature (wide) over range <temperature>

EHHH <temperature> 13

1-color temperature (narrow) under range <temperature>

<temperature>

EUUU 14

1-color temperature (narrow) over range <temperature>

<temperature>

EHHH 15 (low)

* only available through RS485

** Wide and narrow band stands for the first and the second wavelength in 2-color mode

Table10:ErrorCodesin2‐ColorMode(FR models)

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