GPI TM Serie Manual De Usuario página 5

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 water
at 70° F (21° C). Readings using the Factory
Calibration (FAC) may not be accurate in some
situations, for example, under extreme tem-
perature conditions, non-standard plumbing
configurations or with fluids other than water.
Field Calibration Procedures
(Correction Factor Method)
1. To calibrate, press and hold the CALIBRATE
and DISPLAY buttons for about 3 seconds
until you see FLdCAL. Release both buttons
and you will see CF - 00.0. You are now in
the field calibration mode and values from
-99.9% to +99.9% can be entered.
+
2. The /– position appears either as an
"underscore" character for plus, or as a
"hyphen" character for minus. The DIS-
PLAY button selects the position and the
CALIBRATE button toggles this character.
3. The DISPLAY button can then be pushed
to select the numeric positions. Press the
CALIBRATE button to scroll from 0 to 9.
Enter the percentage of change you want
the display to correct. When satisfied with
the value, press both CALIBRATE and
DISPLAY buttons simultaneously. CALEnd
will be displayed and unit will go back to
normal operation, less the FAC (factory
calibration) icon.
4. All enabled units-of-measure remain visible
and selectable – the entered correction will
be applied to all enabled units.
5. To return to factory calibration (FAC), press
and hold both CALIBRATE and DISPLAY
buttons for about 3 seconds until FAcCAL
is displayed. Then release buttons. Unit
should return to normal operation and FAC
icon is visible.
Calibration with Conditioned
Signal Output Module
The K-factor of your meter appears on the
calibration report as the number of pulses per
gallon. The factor is determined during produc-
tion using water at 70° F (21° C). This K-factor
may be used for "single point" calibration
and provide acceptable accuracy. However,
readings may not be accurate when using this
calibration method in some situations. For
example, extreme temperature conditions,
non-standard plumbing configurations or with
fluids other than water.
MAINTENANCE
Proper handling and care will extend the life
and service of the meter.
Turbine Rotor
The meter is virtually maintenance-free. How-
ever, it is important the rotor moves freely. Keep
the meter clean and free of contaminants.
The rotor can be removed for cleaning and
inspection. Begin by unscrewing the nose cone
from the outlet end of the meter. A 1/4" square
socket extension can be used. Remove the
lock and flat thrust washers. Rotor can then be
removed from shaft. Note orientation because
rotor is not bi-directional. Remove debris or
deposits using soft brush or small probe. Reas-
semble in reverse order.
CAUTION
Blowing compressed air through the turbine
assembly could damage the rotor.
Battery Replacement
The computer display is powered by two
3-volt lithium batteries which may be replaced
while the meter is installed. When batteries are
removed or lose power, the batch and cumula-
tive totals and the field and factory calibrations
are re tained.
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