Azbil PTG71, Руководство пользователя

Страница: 31 / 84

Azbil Corporation Installation
Model PTG71 / 72 - Smart Pressure Transmitter 2-11
Handling precautions
• Mounting procedure: Piping conditions differ depending on the process.
Liquid: Mount the nozzle on the pipe side and install the Transmitter sideways
away from the nozzle or below the nozzle so that no deposit is produced
and the gas generated returns to the process piping.
Gas: Mount the nozzle on top or to the side of the process pipe and install the
Transmitter beside or above the nozzle so that the process returns to the
process piping.
Steam: Mount the nozzle in the pipe side and install the Transmitter at the
downside of the nozzle so that the condensed water collects in the conduit
piping.
• Weld or bind with a sealing tape securely to the piping joint to prevent a process
leakage from occurring.
• Avoid installing the Transmitter with its front side facing down. Doing so invites
water, dirt and other sediment to deposit at the wetted part, causing an inaccurate
measurement.
• If the process temperature exceeds 110°C (230°F), take some measures, such as
installing a siphon, to defuse the high temperature at the wetted part so it does not
exceed 110°C (230°F).
• Install the Transmitter in a location where liquid process does not freeze.
Otherwise, take some measures to keep the process fluid from freezing.
• Install the Transmitter in a location where there is no excessive impact, vibration
or pressure (such as water hammering).
• After installing the transmitter, adjust the zero point.
For details on the method of zero point adjustment, refer to chapter 4,
“Calibration.”