Humboldt HM-4160 FlexPanels - Manual (Page 11)

The Fill/Drain Valve (F1) is used to fill and drain the Burette Assembly (B1).
To fill either the External or the Burette chambers, the External Valve (C1)
or the burette value (V1) are opened. If a line is connected to the Quick-
Connect (C1) when filling or draining, the Valve on the cell end should
be closed. Turn the valve to Drain very slowly and the Burette or External
Burette Chamber will drain to a waste container or a drain line. To use the
Fill setting, the burette assembly must be vented. This is done by turning
the Selection Valve (A1) to vent. Then the Fill and Drain Valve (F1) can be
turned to the Fill setting, and water will flow into the Burette and/or the
External chamber. This should be done slowly as not to over-fill the unit.
Group Controls— Section 2
The Controls in Section 2 of a control group are primarily the same as
Section 1. See Section 1 descriptions for an explanation. However, there
are a few differences, which are outlined below:
The Regulator (R2) in Section 2 is not a bias-type regulator.
The Pressure Regulator (R2) supplies a regulated pressure for the burette
assembly in this section. In addition it can be used in conjunction with
Section 1 in Bias mode. With the Bias Valve (BA) set to the Bias On
position pressure settings are added to the settings in Section 1. When
the Bias is on, adjusting pressures with the Section 2 Regulator (R2), will
maintain the differences in pressure between Section 1 and 2 in direct
proportion to the original Section settings.
The Burette Assembly in Section 2 comes with a 10cc Burette readable to
.02cc, and the area of the burette is 0.263cm² .
Group Controls— Section 3
The Pressure Regulator (R3) supplies a regulated pressure for the burette
assembly in this section.
Below the Pressure Regulator (R3) is a Bridge Valve (BV), which takes the
pressure from Pressure Regulator (R2) and bridges it to Burette Assembly
(B3) when the valve is turned to Bridge On. When the bridge is used, the
valve (BA) should be turned to off so the Regulator is isolated from the
system. When using the Regulator (R3) with the Burette Assembly (B3) the
Bridge Valve (BV) should be turned to Off.
The Burette Assembly (B3) comes with a 10cc Burette readable to .02cc,
and the area of the burette is 0.263cm² .
F1
R2
R3
BA
B2
B3
R2
B3
R3
BV