Ashcroft A Installation And Maintenance Instruction Manual - Page 12
Browse online or download pdf Installation And Maintenance Instruction Manual for Measuring Instruments Ashcroft A. Ashcroft A 19 pages. Bimetal thermometer
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When connecting the device without using a thermowell, the pipes must be depressurized.
Do not allow any mechanical force to be applied to the stem; in particular, pay attention to matching the "S" lengths
of the thermometer and the thermowell, to avoid contact against the base of the thermowell.
A thermal transfer medium (heat conducting paste) in the thermowell improves the reaction time and reduces the
measurement error caused by the thermal transfer.
Only mount using the correct open-jawed wrench, and do not twist the device itself.
Do not insert moist or oily stem into hot thermowell.
8.4 Starting up
The precondition for start-up is correct installation. All connecting lines must be laid such that no mechanical forces can
act on the device.
8.4.1 Zero adjustment
On thermometers with an external adjustment option, rotate using a screwdriver until the pointer is showing the desired
temperature on the scale.
8.5 Subsequent relocation of the thermometer
Do not disassemble the device from the measuring point in order to mount it at another measuring
point without cleaning it first (cleaning the stem and thermowell). There is a risk of mixing media
with unpredictable chemical reactions.
9 Maintenance
The device is maintenance-free. However, to ensure reliable operation and a long service life of the device, we
recommend that it is checked regularly.
9.1 Function check 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.
Recommended calibration interval: annual
9.2 Cleaning and maintenance
Cleaning is carried out with a non-aggressive cleaning agent and a damp soft cloth to avoid electrostatic charging. In
the same work process, care can be taken to detect possible damage to the device at an early stage. If any damage is
detected, the unit should be handed over to the manufacturer's service department immediately.
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