2. INSTALLATION
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© 1998 - 2007 DH Instruments, a Fluke Company
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2.1
UNPACKING AND INSPECTION
The VLI consists of the following items:
Table 1.
VLI Parts List
DESCRIPTION
PART #
1 ea.
Visible Level Interface (VLI)
100693
6 ea.
DH 1500 Gland (1500 bar, metric thread)
100265
4 ea.
DH 1500 Collar (1500 bar)
100278
2 ea.
DH 1500 Plug (1500 bar)
102053
1 ea
O-Ring (spare)
101063
4 ea
4x12 mm Button Head Screw
NPN
1 ea.
Operation and Maintenance Manual
550039
OPTIONAL
PART #
1 ea.
1 ea.
VLI Stand, High
OR
VLI Stand, Low
100703
100702
2.2
INITIAL SETUP
Place the VLI on the same surface as the piston gauge or other reference to which it is to be connected.
Ensure the VLI and the connecting hardware are clean and free of contamination.
Connect the VLI to the standard using the connecting hardware supplied.
If the piston gauge medium has the greater density, the connection should be made at the lower port
of the VLI. If this is not true, then the connection should be made at the middle port.
Fill the VLI through the connecting hardware to the tip of the interface level indicator with the fluid that
has the highest density.
Remove the upper pet-cock on the VLI. Carefully fill the rest of the VLI with the lighter medium until
the air is completely displaced form the VLI. Install the upper pet-cock and tighten hand tight.
When interfacing a gas medium with a liquid medium the control of pressure must be performed on
the gas side. A variable volume in the hydraulic side is necessary to adjust the change in the
interface level as pressures and temperatures change.
