Omega FTB380 Series, User Manual

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5
CALIBRATION
Verify Accuracy Before
Beginning Field Calibration
For the most accurate results, dispense at a
flowrate which best simulates your actual oper-
ating conditions. Avoid “dribbling” more fluid
or repeatedly starting and stopping the flow.
This can result in less accurate calibrations.
Make sure you meet the meter’s minimum
flowrate requirements:
A109GMA025NA1 mete r .3 GPM (1.1 LPM)
A109GMA100NA1 meter 3 GPM (11.0 LPM)
A109GMA200NA2 meter 30 GPM (113 LPM)
The use of a uniformly dependable, accurate
calibration container is recommended for the
most accurate results. Due to high flowrate,
it is strongly recommended that calibration
be completed with a combination of volume
and weight using fine resolution scales. For
best results, the meter should be installed and
purged of air before field calibration.
Field Calibration with
Computer Display
Field Calibration and Factory Calibration
are defined in the Operation Section. Factory
calibration settings are programmed into each
computer during manufacturing, using stod-
dard test solvent at 70° F (21° C). Settings
are correct for light liquids such as water,
gasoline or diesel. Readings using the Factory
Calibration (FAC) may not be accurate in some
situations, for example, “heavy” liquids such
as motor oil under extreme temperature condi-
tions, non-standard plumbing configurations
or with fluids other than water.
For improved accuracy under such conditions,
the computer allows for “field” calibration, that
is, user entry of custom calibration parameters.
A “single point” calibration may yield accept-
able accuracy when used in a non-standard
application.
Field Calibration Procedures
(Dispense/Display Method)
1. To field calibrate, press and hold the CALI-
BRATE 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 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 CALI-
BRATE button can be pushed to scroll
the desired value at the blinking position.
Edit the amount shown with the value that
was dispensed above. Values from 000.1
to 999.9 can be entered.
4. When satisfied with the value, press both
CALIBRATE and DISPLAY buttons si-
multaneously. 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: To return to factory calibration (FAC),
press and hold both CALIBRATION and
DISPLAY buttons for about 3 seconds,
until FAcCAL is displayed. Then release
buttons. Unit should return to normal
operation and FAC icon visible
NOTE: If the field calibration mode is entered
and NO fluid is dispensed, then upon leav-
ing, the computer will use data from the
last successful field calibration.
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.