Ashcroft F5509, Инструкция по установке и техническому обслуживанию

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8.4.3 Contact function
Function 1: Close contacts with the indication rising in a clockwise direction.
Function 2: Open contacts with the indication rising in a clockwise direction.
Contact assignment:
1st contact left target value indicator,
2nd contact middle target value indicator,
3rd contact right target value indicator
8.5 Subsequent relocation of the gauge (by the customer)
Recommendation: Do not remove the differential pressure gauge from one pressure monitoring location to
another place, as there is a risk of the process media being mixed, with unforeseeable chemical reactions.
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 servicing the pressure gauge, the process pressure line must be depressurized, the electrical connections
isolated from the mains supply, and special attention should be taken to ensure process pressure is not applied.
9.2 Gauge performance and calibration
Gauge performance 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. In the event of various
device components interacting, the operating instructions for all other devices should also be taken into account.

Check on display.

Check on function, in conjunction with downstream components.

Check of pressurized connection pipes for seal condition.

Check of electrical connections.
9.3 Cleaning and maintenance
Cleaning is carried out using a non-aggressive cleaning agent, with the ventilation valve closed and respecting the
protection category of the device.
10 Faults
10.1 Safety
Defective or faulty pressure 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 of faulty devices must be taken out of service. If a repair is required, contact service department.
10.3 When action is required to repair/replace the gauge:
Possible situations when action should be taken:

Jerky or random movement of the pointer

Pointer does not set to zero for pressure less display