2. INSTALLATION
Page 23
© 2004-2007 DH Instruments, a Fluke Company
Figure 18.
molstic-S with DUT Upstream
Follow these guidelines when connecting the DUT to the upstream of the molstic-S:
•
Inspect the DUT for contamination:
When using the molstic-S with the DUT installed
upstream, as is required when calibrating flow devices that control flow, it is recommended
practice to inspect the DUT for any material that might contaminate either the molstic
plumbing or the molbloc-S elements installed on the molstic.
•
Use inline particulate filters:
Since the smaller molbloc-S elements that are compatible
with the 1/4 in. molstic-S have quite small passages, the 1/4 in. molstic-S comes with a
2 micron particulate filter. There is a filter kit available from
DHI
for use between the DUT
and the inlet of the 1/2 in. molstic-S, to protect the molbloc-S elements from particulate
contamination. (Consult factory for availability of 1/2 in. inline filter kit).
•
Connect DUT to molstic-S inlet:
Since there are so many types and sizes DUTs that
can be calibrated by the molbloc-S, and since there is no standardized dimension for the
DUT’s plumbing centerline to its base, the molstic-S was not designed to accommodate
the DUT directly on its platform. For the sake of flexibility, the molstic-S is supplied with
50 cm of PFA tubing to help make the inlet and outlet connections. Use of the adjustable
DUT stand (P/N 401934) will also facilitate the alignment of the centerline of the DUT’s
inlet plumbing connection with that of the molstic-S plumbing.
•
Connect Gas Supply to DUT Inlet:
Connect the gas supply to the DUT inlet per Section 2.4.1.
•
Leak Check System Plumbing:
Refer to Section 3 for leak check recommendations.
During system leak testing, be extremely careful not to apply pressure in excess of
the maximum operating pressure of the molbox: 600 kPaa (87 psia) for molbox1-
A700K, 250 kPaa (36 psia) for molbox1-A350K models!.
