NEW BRUNSWICK SCIENTIFIC BioFlo 415, Manual To Operations

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65
New Brunswick Scientific User’s Guide
1. Open the
Pump Screen
.
2. Select the feed pump you wish to pump liquid out of the vessel, and press
that pump’s
ASSIGNMENT button to open the PUMP ASSIGNMENT
screen (
see Figure 35
, repeated above).
3. Select the Lvl2 Wet button, whichever corresponds to the probe’s
connection on the control cabinet.
In WET mode:
•
when the liquid is
not in contact
with the probe the pump is turned
off
.
•
when the liquid is
in contact
with the probe the pump is turned
on
.
10.6.3 Level Control Off
When
OFF
is selected from any level (Foam, HiFoam, Lvl2 Wet, Lvl 2 Dry,
Acid or Base) control mode menu, the pump is off.
CAUTION!
Proper pH control is critically dependent on tubing size, which should be
as small as possible. Consult Table 9 for guidance.
10.6.4 Pump Calibration
Pump flow rates are provided in Table 9 (
Section 13.3
). However, more
accurate flow rates through the various lines may be established by pre-
calibrating the pumps, using the
PUMP screen. This screen controls all pump
parameters for the three standard fixed speed pumps supplied with each control
cabinet and for any additional pumps added through the available analog input
and output connections.
Using the
PUMP screen, you can view total pump flow rate in ml/second and
set the pump’s cycle time, and assign each pump to one of six functions (None,
Acid, Base, Foam/Lvl1, Lvl2Wet or Lvl2Dry—the “level dry” function turns
the pump on when the probe is not in contact with liquid;
see Section 10.6 for
details
).
#
NOTE:
To assure the most accurate flow rate, calibrate the pump (see Section
13.3) each time you change tubing.