Vaisala DRYCAP DMT143 User's Guide download pdf (Page 31)

Chapter 4 ________________________________________________________________ Installation

VAISALA ________________________________________________________________________ 29

In the basic operation of the DSC74B, the gas flows to the sensor from

the front and the outlet is on the side. To have the measurement done at

atmospheric pressure, the inlet and outlet are reversed. Then the reducing

parts supplied (G3/8" - G1/2" or G3/8" - G1/4") on the outlet side help to

protect the sensor from ambient humidity coming in.

DSC74B parts are:

- Sampling cell, thread G3/8"

- Connection part with a needle valve and an integrated leak screw

- Reducing Nipple (thread adapter), G3/8" - G1/2"

- Reducing Adapter (thread adapter), G3/8" - G1/4"

0510-032

Figure 15 DSC74B

where

Gas goes in

Gas comes out

0510-033

Figure 16 Removing the Leak Screw

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Vaisala DRYCAP DMT143 User's Guide Page 31