Maintenance - RayTek MI3 Operating Instructions Manual

Maintenance

11 Maintenance
Our sales representatives are always at your disposal for questions regarding application assistance,
calibration, repair, and solutions to specific problems. Please contact your local sales representative, if
you need assistance. In many cases, problems can be solved over the telephone. If you need to return
equipment for servicing, calibration, or repair, please call our Service Department for authorization
prior to return. Phone numbers are listed at the beginning of this document.
11.1 Troubleshooting Minor Problems
Symptom
No output
Erroneous temperature
Erroneous temperature
Erroneous temperature
Erroneous temperature
Temperature fluctuates
Temperature fluctuates
11.2 Fail-Safe Operation
The Fail-Safe system is designed to alert the operator and provide a safe output in case of any system
failure. The sensor 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 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 preset levels. See the following tables:
Symptom
Temperature over range*
Temperature under range*
Head ambient temperature out of range
Communication error between head and box
* related to zoomed temperature range
84
Probable Cause
No power to instrument
Faulty sensor cable
Field of view obstruction
Window lens
Wrong emissivity
Wrong signal processing
No ground for the head
Table 9: Troubleshooting
0 to 5 V
5 V
0 V
5 V
5 V
Table 10: Error Codes for Analog Output
Rev. G Nov/2015
Solution
Check the power supply
Verify cable continuity
Remove the obstruction
Clean the lens
Correct the setting
Correct Peak/Valley Hold or Average settings
Check wiring / grounding
0 to 10 V 0 to 20 mA
10 V 21 to 24 mA
0 V 0 mA
10 V 21 to 24 mA
10 V 21 to 24 mA
4 to 20 mA
21 to 24 mA
2 to 3 mA
21 to 24 mA
21 to 24 mA
MI3