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Flowrate Feature
Some models have of Rate of Flow
mode. To use this feature, press and
release DISPLAY until FLOWRATE icon
appears. The factory set time base will
be highlighted to the right of FLOWRATE
(M = minutes). When FLOWRATE is
invoked, the display will be indicating
rate of flow.
CALIBRATION
Factory and Field Calibration
All calibration information is visible to the
user as icons on the top line of the display,
above the numeric digits.
All units are configured with a "factory"
calibration. Some models are calibrated
with gallons (GL) and others calibrated
with litres (LT). This factory calibration
(indicated with FAC) is permanently
programmed into the computer and is
not user adjustable.
The "field" calibration may be set by the
user, and can be changed or modified at
any time using the calibration procedure
described in the Calibration Section.
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 during
production, and are correct for light fluids
such as water or heavier liquids like pesti-
cides or light oil. However, readings using
the standard factory calibration curves
may not be accurate in some situations –
variations in chemical formulation, viscos-
ity, temperature, and flowrates all effect
meter accuracy. To ensure accuracy, it is
important to check accuracy frequently
and field calibrate when necessary.
Field Calibration Procedures
(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
application. Any amount between .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
(factory 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
entered and NO fluid is dispensed,
then upon leaving, the computer will
use data from the last successful field
calibration.
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