Wise R Series - Repair and Maintenance

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C-QIM-2731-T01_EN_Rev.2
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8. Repair and maintenance
Temperature sensors typically do not require maintenance. Only skilled personnel may carry out
maintenance and repair activities when necessary, and Wise Co., Ltd. may provide support for
maintenance and repair.
 Repairs
Repairs may be carried out only by Wise Co., Ltd. or a component manufacturer.
 Calibration
The accuracy of a temperature sensor may be confirmed through comparative measurements.
Accuracy must be maintained through checks performed at regular intervals. Testing and calibration
must be carried out using suitable test equipment, and by qualified personnel.
Wise Co., Ltd may provide calibration services.
9. Defect
If the defect cannot be removed through the measures listed above, immediately shut down the
equipment. Confirm that all pressure has been released and no signal is output, and protect the
equipment to prevent restarting. In this case, please contact the manufacturer.
If it is necessary to return the equipment, please follow the instructions in Chapter 11, “Returns”.
Defect
Cause
Response
Damaged line and no
signal
Excessive mechanical load or
overheating
Replace with sensor unit of
appropriate structure
Inaccurate
measurement
Overheat, or decreased sensor
accuracy due to overheating of
chemical substances
Use thermowell
Signal interference
Drift current due to ground loop or
electrical field
Used shielded connection cable,
increase distance from motor and
power line
Remove electric potential and use
galvanic insulated transmitter or
barrier
Long response time
Improper installation location
Adjust process line installation
location or insertion depth
Inappropriate thermowell size
Select thermowell with dimensions
usable with the process line
Corrosion
Improper material selected for
inserted components or thermowell
Select material compatible with
process