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計測機器 Alpha Moisture Systems DS1200-PDTのPDF ユーザーマニュアルをオンラインで閲覧またはダウンロードできます。Alpha Moisture Systems DS1200-PDT 17 ページ。 Dewpoint hygrometer

Model DS1200-PDT - Dewpoint Hygrometer

Installing the Model PDT in a Air/Gas Sampling System - Continued

The piping installation schematic diagram below shows all components, which could be

used in a dry gas measurement application although not all the items shown will be

required for every installation.

The ﬂow rate, although not critical to the sensor measurement, should be low enough

to avoid abrasion to the sensor surface without being so low as to extend the system

response time to an unacceptable level. In general, a ﬂow rate of between 2 and 3

litres/minimum at NTP will give the right balance.

The sensor is a variable capacitor, which is directly aﬀected by changes in partial pressure

of water vapour. These changes are proportional to the dew/frost point temperature.

The measuring transmitter can be installed directly into the process line or ducting, but

this can create problems with access for maintenance and calibration. It is for these

reasons that we recommend that the transmitter be installed in a bypass, fast loop or

total loss sample system where the transmitter is accessible without interrupting the

main process ﬂow line.

Piping Installation Schematic