Avoid Corrosive Chemicals; Avoid Ambient Air; Piping Recommendations; Dimensions - GE DewPro MMY 245 Installation And Operation Manual

Portable moisture analyzer

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DewPro MMY245

Installation and Operation Manual

1.3.4.7 Avoid Corrosive Chemicals

Introducing corrosive chemicals can pit or corrode the internal components and can damage the sensor.

Avoid attempting measurements in streams containing chlorine, HCl, and other strong acid or base

gases.

The MMY 245 is a trace moisture analyzer. Ambient air can contain as much as 2% water. The

instrument is capable of measuring down to sub ppm

moisture in samples to 150 psig, so avoid leaving

the operating handle in the measure position when not connected to a sample flow. Ambient air

exposure over long periods of time can move large amounts of moisture into the measurement cell and

eventually cause the sensor to drift.

Connection the MMY 245 to the process or sample tap in the proper manner will insure the most

accurate measurements. Connecting tubing should be made from materials that are non-hygroscopic

and capable of handling the sample pressure. Keeping the length of connecting tubing as short as

possible will allow faster readings since the moisture in the sample arrives quicker than with longer

lines. Materials that are recommended include stainless steel, and PFA tubing especially for dew points

below –65°C, Copper and PTFE tubing. Rubber, Tygon and other plastic or polymer tubing is NOT

recommended for ANY application. Insure that all connections at the sample tap and at the instrument

are leak tight.

Figure 1

GE General Eastern

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