Ashcroft A Manual de instruções de instalação e manutenção - Página 8
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9 Servicing
The device is maintenance-free. However, to ensure reliable operation and a long lifetime for the device, we
recommend that it is checked regularly.
9.1 Safety
When undertaking servicing work on the device fitted without a thermowell, the lines must be depressurized and the
plant secured against being switched on again.
9.2 Check on function, and recalibration
The check on function and recalibration is carried out at regular intervals, depending on the application. The precise
testing cycles should be adjusted in line with the operating conditions and ambient conditions.
Check on display.
Check the thermowell for damage and seal.
9.3 Cleaning and maintenance
Cleaning is carried out using a non-aggressive cleaning agent, respecting the protection category of the device.
10 Faults
10.1 Safety
Defective or faulty gauges put the operational safety and process safety of the plant at risk, and can lead to a risk or
injury to persons, the environment or the plant.
10.2 Conduct in the event of faults
All defective or faulty devices are to be taken out of service. If a repair is required, the device is to be sent directly to
our Repairs Department. We request that all returns of devices are agreed with our Service Department.
10.3 Fault table
Possible situations indicating a fault:
Jerky or random movement of the pointer
No correspondence between the measured value being displayed and actual temperature
Bent or loose pointer
Cracked window
Damage to housing
Extended storage at temperatures above 60 °C
In these instances, replacement of the gauge is always required.
10.4 Conduct following fault rectification
See Chapter 8 Mounting/Installation
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