Ashcroft P5500, Инструкция по установке и техническому обслуживанию

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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.
8.3 Mounting/Installation
8.3.1 Process connection
As standard, the device is equipped for pipework mounting with a pressure connection shank pursuant to DIN EN 837-
3. The device is calibrated ex works for vertical installation.
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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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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.
8.3.2 Electrical connection
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, EN
60079-17, etc.).
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Connection to be undertaken by authorized and qualified specialist staff only.
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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.
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Disconnect the plant from the mains supply before wiring electrical connections.
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Install appropriate fuses upstream.
Please refer to type label
for configuration of
connections.
8.4 Starting up
The precondition for start-up is proper installation of all electrical feed lines and metering pipes. All connecting lines
must be laid such that no mechanical forces can act on the device.
Before start-up, the seal on the pressurized connection line must be checked.
8.4.1 Zero point adjustment
The pressure gauges are supplied calibrated ex works, so that as a rule there is no need for calibration works at the
installation point.
On some devices (see. order code), zero point adjustment on site is possible. For this, proceed as follows:
Grounding connector for single-
wire conductor 4 … 6 mm²