Monday, 18 May 2020

What are the precautions to be followed in setting up and operation of manometer?

What are the precautions to be followed in setting up and
operation of manometer?
The installation location of the pressure-gauges should be easily accessible and close to the gas pressure measurements; if possible, above the measuring point.


Between the pressure withdrawal point and the measuring unit, a shut-off device should be introduced which allows a renewal and null-point check of the running system. Up to the final commissioning, the shut-off equipment should remain closed in the measurement piping.

If pressure peaks are expected, suitable protective equipment may be considered, such as a pressure peak suppressor

The piping up to the measuring unit should provide a vibration-free, stable attachment; otherwise, a wall bracket or some additional fortification via an  attachment rim on the housing should be provided. Alternatively, mounting in a an instrument panel may be considered.

The attachment of the manometer is to be executed in such a way that the admissible operating temperature does not violate min. and max. limits.

With gauges for gas measurements, accumulation of condensation is to be avoided by a suitable piping design.
For sealing of measuring unit's connections, sealing disks or sealing-edge-rings are utilised.
During screw-in or screw-out, the force must not be exerted on the manometer housing, rather applied only over the four hexagonal connection-clips.
Before attaching the gauges, the measuring piping should be cleaned with the Medium to be measured or with clean compressed air.
While squeezing off or blowing through the piping or containers, the gauge may not be over-pressed. If the expected pressure is higher, the manometer must be removed or locked off. 

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