Basic Sampling Or Spot-Checking; General Operation Practice - GE DewPro MMY 245 Installation And Operation Manual

DewPro MMY245

2.3 Basic Sampling or Spot-Checking

Sampling or spot-checking of a pressurized gaseous sample is the primary design function of operation
the MMY 245. The following general procedure describes this fundamental operation:
WARNING! The MMY 245 has a maximum pressure of 150 psig or 10 bar(g).
Connecting the unit to a sample pressure could cause damage to the unit or
personal injury or death.
1. Connect the analyzer to the sample source connection using either hard tubing and the appropriate
fittings, or the hose and fitting set P/N 63002199 (see Figure 4.) and initiate the flow by opening
the sample tap valve.
2. Allow the sample to purge the connecting tubing for a few minutes.
WARNING! If there is any evidence of aerosols or the presence of condensate in
the exhaust, DO NOT PROCEED. The unit is designed for gaseous use only and
any liquid droplets or aerosols will damage the desiccant chamber.
3. Turn on the power by pressing the power switch.
4. Rotate the handle to the measure position (vertical).
5. Observe the rate-of-change bar graph indicator until both arrowheads appear indicating the reading
has stabilized.
6. Record the moisture value.
7. Rotate the handle back to the "dry" position.
8. Turn off the power by pressing the power switch.
9. Disconnect the analyzer from the sample source.

2.4 General Operation Practice

Making a moisture measurement with the DewPro MMY 245 is simple but there are some general
moisture measurement practices that should be followed. If these practices are followed, the MMY 245
will provide many years of reliable service.
GE General Eastern
Installation and Operation Manual
Figure 4
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