Operation; Batch And Cumulative Totals; Factory And Field Calibration Curves; Selecting A Different Calibration Setting - GPI TM Series Operation Manual

4. Check the readout. If the amount metered
is accurate, field calibration is not neces-
sary. If not, refer to the Calibration Section
for further instructions.

OPERATION

Batch and Cumulative Totals

The meter maintains two totals. The Cumula-
tive Total provides continuous measurement
and cannot be manually reset. The Batch Total
can be reset to measure flow during a single
use. The Cumulative Total is labeled with TO-
TAL 1 LOCKED indicating that this total is
locked and cannot be manually zeroed. Batch
Total is labeled with TOTAL 2.
When the Cumulative Total reaches a maxi-
mum reading of 999,999, it will automatically
reset to zero.
Press the DISPLAY button briefly to switch
between the batch, cumulative total, and
flowrate.
NOTE: Totalization counts total units without
differentiating between gallons, litres or
field calibrated units.
Flowrate Feature
When this feature is activated, the word FLOW-
RATE displays to the left on the bottom line.
When FLOWRATE is displayed, the numbers
on the middle line reflect the rate of flow, for
example, the current gallons per minute (GPM)
or litres per minute (LPM).
Display FLOWRATE
To use this feature, press and release DISPLAY
until FLOWRATE appears to the left of the
bottom line.
Activate the Meter
Turn the meter ON by starting water flow or
briefly pressing the DISPLAY button. The meter
will display the Batch or Cumulative Total from
last use.
Press DISPLAY briefly to display the Batch
Total. Hold the DISPLAY button down for 3
seconds to reset the Batch Total to zero.
2
The meter is programmed to turn off auto-
matically if not used for 4 minutes.

Factory and Field Calibration Curves

All calibration information is visible to the user
as words in the upper part of the display, above
the numeric digits.
All units are configured with a "factory" calibra-
tion curve. Both gallons and litres are available
("GAL" or "LTR" will be displayed). Use the
CALIBRATE and DISPLAY buttons to switch
between gallons and litres. This curve is NOT
user adjustable: the word "PRESET" is dis-
played to show this. (The factory calibration is
stored permanently in the computer's memory.)
The "field" calibration curve may be set by the
user, and can be changed or modified at any
time using the calibration procedure described
below in the Calibration Section. Totals or
flowrate derived from the field calibration are
visible when the field calibration setting is se-
lected ("CAL B" will be visible on the top line).
Selecting a Different
Calibration Setting
You can switch between GAL and LTR modes
at will without "corrupting" totalizer contents.
For example, the computer can totalize 10.00
gallons. If the user switches to LTR mode, the
display will immediately change to "37.50" (the
same amount in units of litres). GAL / LTR
switching also works in FLOWRATE mode.
To select a different calibration setting, first
press and hold the CALIBRATE button. Con-
tinue to hold it while also pressing and releasing
the DISPLAY button. (You may then also re-
lease the CALIBRATE button.) The flag indica-
tors in the top line of the display will change to
show the newly selected calibration setting.
Calibration settings change in this order: GAL,
LTR, CAL B, GAL, etc. While fluid is flowing,
only the GAL and LTR selections may be made.
However, when NO fluid flow is occurring, any
setting may be selected.
Field Calibration
Factory calibration settings are custom-pro-
grammed into each flowmeter during produc-
tion, using water at 70°F (21°C). Readings us-
ing the standard factory calibration curves may
not be accurate in some situations – for ex-
ample, under extreme temperature conditions.