Vaisala DMT143 - Manual (Page 30)

USER'S GUIDE ____________________________________________________________________
28 ___________________________________________________________________ M211435EN-E
When using the 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
1 = Thread adapter type G3/8" - G1/2"
2 = Thread adapter type G3/8" - G1/4"
3 = Quick connector
4 = Leak screw
5 = Sampling cell body (DMT242SC)
DSC74B Two-Pressure Sampling Cell
The DSC74B and DSC74C sampling cells are enhanced versions of the
DSC74. The body is designed in a way that it is possible to measure at
both system pressure and atmospheric pressure.
The 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).