5
(IGL). The unit chosen will become the
meter’s default after one minute. These
factory calibrations (indicated by FAC)
are permanently programmed into the
computer and are not user adjustable.
The “field” calibration may be set by the
user, and can be changed or modified
at any time using the calibration proce-
dure described in the Calibration Sec-
tion. Totals or flowrate derived from the
field calibration are invoked when the
FAC icon is no longer visible on the top
line of the display.
Field Calibration
Factory calibration settings are custom-
programmed into each flowmeter dur-
ing production, and are correct for light
fluids such as water or heavier liquids
like pesticides or light oil. However,
readings using the standard factory cal-
ibration curves may not be accurate in
some situations, i.e., variations in
chemical formulation, viscosity, tem-
perature, and flowrates all affect meter
accuracy. To ensure accuracy, it is im-
portant to check accuracy frequently
and field calibrate when necessary.
Field Calibration Procedures
Note: Before calibrating, purge the sys-
tem of air.
(Dispense/Display Method)
1.
To field calibrate, press and hold the
CALIBRATE and DISPLAY buttons
for about 3 seconds until you see
FLdCAL. Release both buttons and
you will see dd000.0. You are now in
the field calibration mode.
2.
Dispense a known amount of fluid at
a flowrate representative of the ap-
plication. Any amount between
000.1 and 999.9 units can be used.
Display will count-up while fluid is
flowing through the meter.
3.
The DISPLAY button can then be
pushed to select the digit location
and the CALIBRATE button can be
pushed to scroll the desired value at
the blinking position. Edit the amount
shown with the value that was dis-
pensed above. Values from 000.1 to
999.9 can be entered.
4.
When satisfied with the value, press
both CALIBRATE and DISPLAY but-
tons simultaneously. CALEnd will be
displayed and unit will go back to
normal operation, less the FAC (fac-
tory calibration) icon.
5.
The meter will now be operating with
a custom calibration number unique
to the above dispense procedure.
No unit of measure (gallon, litre, etc.)
icon will be highlighted.
Note: If the field calibration mode is en-
tered and NO fluid is dispensed,
then upon leaving, the computer
will use data from the last suc-
cessful field calibration.
Calibration Container
The desired calibration container
should be uniformly dependable and
constructed with a graduated neck. The
container’s volume indicator should be
clearly and precisely marked. It is help-
ful if the container’s material allows a
window through which the level of liquid
can be viewed. GPI offers a properly
designed calibration container for vol-
umes of 5 gallons or 5 litres.
DO NOT use several smaller contain-
ers or a larger container with a 5-gallon
marking.
For the most accurate results, dispense
at flowrates that best simulate your ac-
tual operating conditions. Avoid “drib-
bling” more fluid or repeatedly starting
and stopping the flow. These actions
will result in less accurate calibrations.
During calibration, make sure you meet
the meter’s minimum flowrate require-
ments of 2 GPM (7 LPM).
MAINTENANCE
This meter is virtually maintenance
free. It is important, however, that the
nutator disc moves freely.
To prevent drying of chemical on inter-
nal assemblies, meters should be kept
