Ashcroft DPS09 Panduan Instruksi Instalasi dan Pemeliharaan - Halaman 5

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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 differential 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.

7 Assembly/Installation

7.1

Safety

To ensure safe working during installation and servicing, suitable shut-off valves must be installed in the plant (see 6.2

Accessories), enabling the device:

To be depressurized or taken out of operation;

To be disconnected from the mains supply for repair or checks within the relevant plant;

Or to enable function tests of the device to be performed "on site".

During the works to mounUinstall the gauge, the plant must be protected against being switched back on.

7.2 Preparations (requirements for the installation location)

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A check on suitability of the device for the medium to be measured, the scope of the measurement range and of

the protection against special conditions such as vibrations, pulsations and pressure spikes.

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A bracket must be installed to support the pressure gauge if the metering pipe is not able to provide adequate

support.

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The installation location should be chosen such that the work-spaces for operating personnel are not located to

the rear of the pressure gauge.

7.3 Mounting/Installation

7.3.1 Process connection

The instrument is intended and factory adjusted for vertical mounting, pressure ports downward. When mounted

in other orientation (max. ± 10

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Connection to be undertaken by authorized and qualified specialist staff only.

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Use only with the mechanical process connection provided - regarding the configuration, see order code on the

device type label, with a matching threaded seal.

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When connecting the device, the pipes must be depressurized.

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The pressure metering pipe must be laid inclined in such a way that, for example, for measurements of fluids no

air pockets can form, and for measurements of gases no water pockets. If the necessary incline is not achieved,

then at suitable points water separators or air separators must be installed.

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The pressure metering pipe must be kept as short as possible and laid without sharp bends, to avoid the

occurrence of irritating delays.

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The instruments pressure ports are marked by"+ " and "- " symbols:

"+" port must be connected to the higher pressure

"-" port must be connected to the lower pressure.

With liquid measurement media, the pressurized connection pipe must be degassed, since any gas bubble

inclusions result in measurement error.

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If water is used as the measurement medium, the device must be frost-protected.

Safety notice: Only mount using the correct open- jawed wrench, and do not twist the device itself.

) the pointers' zero position needs to be adjusted (see 7.4.1 Zero point adjustment).

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