Ashcroft S5500 Manual de instruções de instalação e manutenção - Página 7
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Take note of the electrical data in the EU design type test certification and the
locally-applicable regulations and guidelines for installing and operating electrical
plant in explosion risk areas (e.g. EN 60079-14, etc.).
Connection to be undertaken by authorized and qualified specialist staff only.
The electrical connection of the device is to be undertaken in accordance with
the relevant regulations of the VDE and the regulations supplied by the local
utilities company.
Disconnect the plant from the mains supply before wiring electrical
connections.
Install appropriate fuses upstream.
7.4 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.
Before start-up, the seal on the thermowell in the pipe must be checked.
7.4.1 Zero point adjustment
On thermometers with an external adjustment option, remove the plug at the
top of the case and rotate using a screwdriver until the pointer is showing the
desired temperature on the scale.
7.4.2 Setting the switch point
An adjustable lock is fitted in the front panel of the thermometer.
Using the removable adjustment key, the contacts mounted on the
target value indicators can be set to any point on the range
covered by the scale.
For reasons relating to accuracy of switching and the lifetime of
mechanical measurement systems, the switch points should be
positioned between 10% and 90% of the range.
Place the adjustment key on the axle of the adjustable lock.
Press the axle inwards, until the carrier arm grips behind the
adjuster pin on the target value indicator.
By turning the key, adjust the target value indicator to the
desired switch point.
Release the pressure on the axle, and remove the adjustment key.
8 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.
8.1 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.
8.2 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.
Page 7 of 8
Please refer to type label for
configuration of connections