Troubleshooting Minor Problems; Fail-Safe Operation; Fail-Safe Error Codes (Displayed Or Transmitted Via Electrical Interface); Table 12: Troubleshooting - Fluke endurance series User Manual

Endurance® Series
Users Manual
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 contact our Service Department before shipping. 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

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. Basically, it is designed to shut down the process in the event of a set-up
error, system error, or a failure in the sensor electronics.
Warning
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!

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.
86

Table 12: Troubleshooting

Probable Cause
No power to instrument
Faulty sensor cable
Field of view obstruction
Window lens
Wrong slope or emissivity
Wrong signal processing
Solution
Check the power supply
Verify cable continuity
Remove the obstruction
Clean the lens
Correct the setting
Correct Peak Hold or Average settings