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-7
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Section
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: Set-up and Calibration
FLOWSENSOR CALIBRATION
NOTE:
The flowsensor is calibrated at
Hale Products Inc. and matched to the
control unit. If the system is installed
properly only minor adjustments should
be necessary to flowsensor reading.
Flowsensor calibration should be verified
during NFPA/UL testing of apparatus
and delivery to end user.
NOTE:
An accurate flow measuring
device must be used to measure the
water flow when calibrating the
flowsensor(s). Use a suitable size smooth
bore nozzle and an accurate Pitot
Gauge instrument. Hand held pitot
gauges are usually not very accurate.
Make sure the system is calibrated with
an accurate flow measuring device.
Determine the water flow normally
expected from the discharge outlet and
establish flow. Make sure the water flow
established is within the range of the
flowsensor monitoring the discharge. For
example, actually establish a flow of 150
GPM (568 LPM) of water through a nozzle
and Pitot system. Compare the calculated
flow value to the value shown on the
control unit digital display.
If the value requires adjustment do the
following:
Enter system user calibration mode using
the method previously described. Press the
SELECT DISPLAY
button to illuminate the LED
under
FLOW
. The current water flow rate
preceeded by a "
C" will be displayed (See
figure 3-4). Press the
é
or
ê
button to set
the reading to match the actual flow
calculated from the Pitot gauge reading.
Decrease fire pump pressure by
approximately ½ and recalculate water
flow rate. Verify the reading on the control
unit is within 5% of the actual value. Stop
the water flow when the reading
adjustments are completed.
To lock the settings, exit system user
calibration mode by pressing and holding
the
SELECT DISPLAY
button, then pressing
and releasing the
é
and
ê
buttons. The
word “
HALE” will appear for several seconds
followed by the default display.
FOAM CONCENTRATE INJECTION RATE
When the Hale FoamMaster system power is
turned on, the foam concentrate injection
rate in memory will be the default injection
rate setting. The user specific default
concentrate injection rate can be adjusted
in system calibration mode. Enter system
user calibration mode as previously
described.
Use the
SELECT DISPLAY
button to illuminate
the LED below
% FOAM
. The display will
show the current default concentrate
injection rate stored in the computer
memory for the selected foam concentrate
tank (see figure 3-5). If the factory default
values have not been changed the display
will show “
PA 0.5” for a single tank system or
dual tank system with selector in the
TANK A
position. When a dual tank system is
installed and the selector is placed in the
TANK B
position the display will show "
Pb
1.0". The
é
or
ê
buttons can be used to set
the user specified default concentrate
injection rate.
Figure 3-4. Flowsensor Calibration Display
