Ashcroft P6500 Handleiding voor installatie en onderhoud - Pagina 5

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5 Construction and function

5.1 Overview

Diaphragm

Rod

Movement

5.2 Description of function

The sensing element, the concentrically rippled diaphragm element, is clamped in place between two flanges and

charged with the medium on one side.

Under the pressure acting on it, there is an elastic displacement out of the normal position. This displacement is

proportional to the adjacent pressure. On the side of the diaphragm element facing away from the medium, a rod

picks up the displacement and transfers it to a movement mechanism.

The display of the measured value is given on a 270° scale.

5.3 Description of components

5.3.1 Scale with pointer

The pressure gauge is equipped with a dial face and pointer pursuant to EN 837-3, nominal size 100 mm or 160 mm.

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5.3.2 Instrument connection

The instrument connection is located on the underside of the pressure gauge and can be a threaded or flanged

connector.

5.3.3 Vent valve

The vent valve for the housing is located on the top side. If the nipple is pulled out, the housing is ventilated and the

pressure which has built up in the housing due to the influence of temperature is discharged. With the valve closed,

protection class IP 65 is achieved.

5.3.4 Rear wall/plug with blow-out capability

The pressure gauge has a plug capable of blowing out on the rear wall of the housing (Model P5500) or a rear wall

capable of blowing out (Model P6500). These act as a safety feature pursuant to EN 837-3 and simultaneously allow

for temperature compensation for the housing, via a rubber membrane.

5.4 Accessories

Please contact the manufacturer regarding special tools and accessories.

6 Transport

6.1 Safety

The pressure gauge should be protected against the effects of knocks and impacts. The device should only be

transported in the packaging provided, to protect against glass breakage. The device should only be transported in a

clean condition (free of residues of measuring media).

6.2 Transport inspection

The delivery must be checked for completeness and damage during transport. In the event of damage during

transport, the delivery must not be accepted, or only accepted subject to reservation of the scope of the damage being

recorded and, if necessary, a complaint initiated.

6.3 Storage

The pressure gauge must be stored in dry, clean conditions, within a temperature range of -40 to +70 °C, protected

against direct exposure to sunlight and protected against impact damage.

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