User manual VAISALA DSS70A DATASHEET

[. . . ] www. vaisala. com DSS70A Portable Sampling System and Sampling Cells for DM70 The DSS70A provides a compact solution for field checking dew point where direct measurement is difficult. Typical applications for the sampling system are metal treatment and plastics drying processes. DSS70A portable sampling system The DSS70A is designed to provide dew point sampling flexibility for the DM70 hand-held dew point meter. For processes at atmospheric pressure, a battery powered pump is used to extract a gas sample. [. . . ] Gas temperatures higher than +40 °C (+104 °F) should be cooled with a short PTFE (included in the DSS70A system) or stainless steel tube prior to entering the DSS70A. ambient pressure. This sampling cell is especially suitable for dew point measurements in SF6 gas with the DMP74C probe. The DMT242SC2 is a sampling cell supplied with welded Swagelok connectors for sampling in a 1/4" pipeline. Sampling cells for pressurized processes The DM70 can easily be connected to pressurized processes. In addition to direct pipeline installation, a variety of sampling cell options are available for gas sampling. It has a variety of connection adapters that allow several different ways of installation. The quick connector with a leak screw allows a very fast connection for compressed air lines. The DSC74B is a two-pressure sampling cell, which enables measurements in both process and The sampling cells (from the left) DMT242SC2, DMT242SC and DSC74 can be used to connect the DM70 to sample gas flow. The DSC74B (right) is a twopressure sampling cell that can be used for measurements in either pressurized or ambient pressure. The cooling/venting coil is included in the DSC74C sample cell, but is an option for all sampling cells. Technical data DSS70A Sampling System and DSC74B/C Sampling Cells Filter Sampling Cell for Td Probe Needle Valve Flow meter Sample Pump Sample Gas Outlet DMCOIL DMT242SC pressure limit DMT242SC2 pressure limit Material for all sampling cells Sample Gas Inlet DSS70A cooling/venting coil sampling cell 10 MPa (100 barg, 1450 psig) sampling cell with Swagelok connectors 4 MPa (40 barg, 580 psig) stainless steel AISI316 The DSS70A sampling system includes a filter to clean the dirty sample gas and a needle valve to control the sample flow rate with the flow meter. A sample pump is used to generate a sample flow from processes at ambient pressure. Measurement in gas pressure Sample gas inlet Sampling Cell for Td Probe Valve Removable flow limiter Sample gas outlet DSS70A sampling system Operating conditions Operating gases Dew point range Inlet/outlet connection Operating temperature ambient temperature Process gas temperature with PTFE tube at +20 °C (+68 °F) (included in the DSS70A) with stainless steel tube air, N2 and other non-toxic, inert gases -70 °C . . . +200 °C (+392 °F) DSC74B Sample gas outlet Removable flow limiter Valve Sampling Cell for Td Probe Measurement in atmospheric pressure Sample gas inlet DSC74B DSC74C Diffusion coil specification according to stainless steel tube specification Maximum gas temperature at inlet +40 °C (+104 °F) Operating pressure with pump 0. 6 . . . 290 psia) The DSC74B sampling cell enables the measurement of the sampled gas either in gas pressure up to 10 bar or in atmospheric pressure depending on the gas inlet and outlet. [. . . ] The reproduction, transfer, distribution or storage of information contained in this brochure in any form without the prior written consent of Vaisala is strictly prohibited. All specifications -- technical included -- are subject to change without notice. [. . . ]