Vaisala DPT146 Guide de l'utilisateur télécharger pdf (Page 29)

Chapter 4 ________________________________________________________________ Installation

VAISALA ________________________________________________________________________ 27

When using DSC74, seal the threads of the quick connector or thread

adapter carefully with PTFE thread seal tape. Tighten with an open-end

wrench.

0507-105

Figure 14 DSC74 Sampling Cell with Accessories

where

Thread adapter type G3/8" - G1/2"

Thread adapter type G3/8" - G1/4"

Quick connector

Leak screw

Sampling cell body (DMT242SC)

DSC74B Two-Pressure Sampling Cell

DSC74B and DSC74C sampling cells are enhanced versions of the

DSC74. The body is designed so that it is possible to measure at both

system pressure and atmospheric pressure.

DSC74B limits the flow rate with a fixed leak screw. The flow is

optimized for pressures 3 ... 10 barg. The fixed leak screw eliminates the

risk of opening the leak screw fully by accident and this way emptying a

gas vessel. The maximum flow can be increased, if needed, by removing

the leak screw and adjusting the flow manually with the valve. Harmful

gases can be recovered by connecting a collection system at the outlet

(not available from Vaisala).

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

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 70 71

Pas de commentaire

Vaisala DPT146 Guide de l'utilisateur Page 29