Humboldt HM-4165 3-Cell Manual Control Panel - Manual (Page 3)

INTRODUCTION
The HM-4165 Pressure Control/Distribution Panel is designed to
control cell and back pressure outputs for up to three triaxial cells.
A digital pressure display allows the monitoring of the pressure of each
output individually. The HM-4165 panel includes the air and water
distribution capabilities including tap water, as well as de-aerated water.
The panel also controls the vacuum necessary to remove air from the tap
water in the de-airing tank. The digital pressure gauge is powered by an
AC to DC transformer and a 110/220 VAC power source is required. A
supply of compressed air is necessary as well as vacuum, tap water, and
a drain to allow water to be removed from the test apparatus.
INSTALLATION
The HM-4165 is a simple bench mounted system, which requires no
fixed mounting.
PANEL MOUNTING
A pair of supporting feet is supplied with the panel so that it can be
bench mounted and remain stable. Screws, nuts, and washers for the
support feet are supplied so that the support feet can be attached as
shown in Figure 1.
AIR/WATER CONNECTIONS
All connections will require either 1/4 inch OD or 1/8 inch OD flexible
tubing. However, metric adapters are available to allow connecting the
¼ inch tubing to 6 mm tubing.
PANEL CONNECTIONS
The panel is equipped with push-to-connect-style fittings on the back
side of the panel frame. It is necessary to use 1/4" OD flexible tubing
to make the connections. Figure 2 shows how the connections are to be
made with air and water sources, as well as connections to the triaxial
cell and other equipment. The panel is designed to accommodate 3
triaxial test apparatuses simultaneously. However, only the connections
for one triaxial test apparatus are shown in the figure. The two remaining
test apparatuses connect to their respective connection locations. Insert
the tubing into the fittings. The seal in the fitting will resist the tubing
and a little extra force will be required to get the tubing to pass through
the seal in the fitting. To make sure the fitting is in all the way, lightly
pull on the tubing. If it comes out of the fitting, it was not inserted
completely. While facing the back of the panel, the four connections
starting from the left are for the water drain, tap water input, vacuum
input, and compressed air input respectively. The last three connections
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