GPI GM001, Руководство пользователя, Страница: 10 / 20

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2. The far left digit will be blinking. The DISPLAY button
can then be pressed to select the digit location and the
CALIBRATE button can be pressed to scroll the desired
value at the blinking position. Edit the K-factor shown to
the desired value. Acceptable K-factor range is 0000.1 to
9999.9.
3. After the new value has been entered, momentarily press
and release both buttons. “CALEND” will be momentarily
displayed. Unit is now ready for use.
4. Notice that the upper display line, the “FAC” icon and all
the units of measure have disappeared.
Alternate units of measure are not selectable when the meter
is operating with field calibration. This calibration is a unique
single-point calibration for the meter and/or application.
NOTE: 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.
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.
T A B L E 1
Typical K-Factor
Model Size (pulses / gallon)
G2_05 1/2 in. 2500
G2_07 3/4 in. 1100
G2_10 1 in. 560
G2_15 1-1/2 in. 215
G2_20 2 in. 100
G2P05 1/2 in. 2400
G2P10 1 in. 540
G_T-051 1/2 in. 10000
G_T-075 3/4 in. 3750
G_T-100 1 in. 896
G_T-150 1-1/2 in. 350
G_T-200 2 in. 181
G_T-300 3 in. 50
G_P-050 1/2 in. 10000
G_P-051 1/2 in. 10000
G_P-075 3/4 in. 3750
G_P-100 1 in. 896
G_P-150 1-1/2 in. 340
G_P-200 2 in. 181
GM001 1/8 in. 5855
GM002 1/4 in. 3785
GM003 1/4 in. 1514
GM005 1/2 in. 424
GM006 3/4 in. 197
GM007 1 in. 197
GM010 1 in. 136
GM015 1-1/2 in. 55
GM020 2 in. 25
Field Calibration Procedures
(Correction Factor Method)
If the display was purchased with a meter body then the
field calibration method set at the factory is the Correction
Factor method.
This method allows the user to tweak the factory calibration
by a percent that represents application, fluid or plumbing
differences.
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” char-
acter for plus, or as a “hyphen” character for minus. The
DISPLAY 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 select-
able – 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.
Setting 4-20 mA Endpoints
The 4-20 mA endpoint settings are independent from the
display calibration. If you reset the response time you MUST
reset the 4-20 mA endpoints.
All units are shipped with the following items preset:
• 4 mA setpoint = 10 Hz
• 20 mA setpoint = 1000 Hz
• Response time = 0.7 seconds
Any new values you set for these items are automatically
saved when the transmitter is powered down, and automati-
cally restored the next time power is applied.
Procedure
Before you start, the fluid pumping system should be ready
to make two simple calibrating runs, first at the lowest an-
ticipated flowrate, and then the second at the highest antici-
pated flowrate. Position yourself so you can easily operate
the transmitter’s pushbuttons. You should be able to see the
indicator light (the small window beside the “4” button).