GPI FM-300HR User manual

920679-06E
FM-300H and
FM-300HR
Electronic Disc Meter Owner’s Manual
04/14

2FM-300H & FM-300HR / 920679-06E
TABLE OF CONTENTS
General Information ............................ 2
Before Installation................................ 3
Installation ........................................... 3
Before Each Use ................................. 3
Operation............................................. 4
Calibration ........................................... 5
Maintenance........................................ 6
Troubleshooting.............................. 9-10
Illustrated Parts List............................11
Specications .................................... 12
Service .............................................. 12
To the owner…
Congratulations on receiving your GPI
Electronic Disc Meter. We are pleased to
provide you with a meter designed to give
you maximum reliability and efciency.
Our business is the design manufacture,
and marketing of liquid handling, agri-
cultural, and recreational products. We
succeed because we provide customers
with innovative, reliable, safe, timely, and
competitively-priced products. We pride
ourselves in conducting our business with
integrity and professionalism.
We are proud to provide you with a qual-
ity product and the support you need to
obtain years of safe, dependable service.
Victor Lukic, President
Great Plains Industries, Inc.
GENERAL INFORMATION
This manual assists you in operating and
maintaining your meter. Please take a few
moments to acquaint yourself with the
information here.
If you need assistance, contact the dealer
from whom you purchased your meter.
If You Measure in Litres
This manual commonly refers to “gallons.”
If your meter is factory calibrated in litres,
consider all references to “gallons” apply
equally to “litres.”
This symbol is used throughout
the manual to call your attention
to safety messages.
WARNING
Warnings alert you
to the potential for
personal injury.
CAUTION
Cautions call your
attention to prac-
tices or procedures
which may cause
damage to your
equipment.
Notes give you information that can
improve efciency of opera tions.
It is your responsibility to:
• make sure all operators have access to
adequate instructions about safe operat-
ing and maintenance procedures.
•know and follow all safety precautions
as specied by your chemical manu-
facturer for handling of the uid being
metered.
Read Me!
For your safety, review the major warn-
ings and cautions below before operating
your meter.
1. This meter is approved to handle
water, pesticides, fertilizers and most
industrial uids. Do not use for gaso-
line, diesel or other uids. Do not use
this meter with ammable liquids.
2. When handling hazardous chemicals,
For Technical Assistance call:
1-800-835-0113

FM-300H & FM-300HR / 920679-06E 3
always follow the chemical manu-
facturer’s safety precautions. Wear
protective clothing such as goggles,
gloves, and respirators, as instructed.
3. To avoid damage, DO NOT blow
compressed air through the meter.
Your electronic disc meter is designed
for measuring a wide range of chemicals.
The meter translates ow data from the
nutator disc into calibrated units shown on
the meter’s readout. A eld replaceable
battery provides power.
BEFORE INSTALLATION
Upon receipt, examine your meter for
visible damage. Remove protective plugs
and caps for a thorough inspection. If any
items are damaged or missing, contact
your distributor.
To avoid damage, DO NOT blow com-
pressed air through the meter.
CAUTION
If the meter is located in a rigid piping
system where the uid is trapped (for
example, by gravity, valves or nozzles)
thermal expansion of the uid can create
pressure spikes that can damage a meter.
Install a thermal relief valve or otherwise
allow for thermal expansion of the uid.
Connect Battery
To save power, this meter is shipped with
the battery disconnected. Before using,
connect the battery using the instruc-
tions below:
1. Remove the two large and two small
screws from the battery coverplate
located on the lower portion of the
meter face.
2. Remove the battery and plug into bat-
tery connections. When connected
properly, numbersappear in themeter
readout.
3. Replace the gasket and battery
cover and tighten securely. Torque
the screws to 9 to 10 in. lbs.
INSTALLATION
Note: To avoid damage to the inlet and
outlet, install this meter ONLY on
plastic hose end or pipe ttings.
1. To protect against leakage, seal all
threads with two or three turns of
thread tape or a pipe thread sealant
compatible with the liquid being mea-
sured. Make sure the thread tape or
sealant does not interfere with ow.
2. Hand-tighten the meter onto the t-
tings until snug. (Figure 1)
FIGURE 1
To avoid damage to the housing, DO
NOT use a wrench.
CAUTION
BEFORE EACH USE
If the meter has been used before, make
sure it is ushed and cleaned as outlined
in the Maintenance Section.
Press and release the DISPLAY button to
ensure the meter is operating. Numbers
will display from the last use.
If the display becomes dim, faded or the
low battery message appears (see below),
battery needs to be replaced. Reference
the Maintenance Section for details. Also
check battery terminals for corrosion. To
prevent corrosion from condensation, coat
the terminals with petroleum jelly.

4FM-300H & FM-300HR / 920679-06E
Verify Meter Accuracy
Before using, verify calibration and check
the meter’s accuracy.
1. If desired, hold down DISPLAY for
three seconds to zero the meter’s
Batch Total. When zeros appear,
release the button.
2. Meter an exact known volume into an
accurate container. For best results,
meter with one continuous full stream.
3. Check the readout. If the amount me-
tered is accurate, eld calibration is not
needed. If not, refer to the Calibration
Section for further instructions.
Note: Best performance can be obtained
by using the factory calibration.
OPERATION
This meter is approved to handle water,
pesticides, fertilizers and most industrial
uids. Do not use for gasoline, diesel or
other fuels. Do not use this meter with
ammable liquids.
WARNING
Computer Display
All operations are reected in the LCD
readout. The large center digits indicate
amounts, where smaller words or “icons”
located above and below indicate specic
information regarding totals, ow, calibra-
tion and units of measure.
Activate the Meter
Computer is on continuously and always
ready to perform. The computer is powered
by a eld replaceable battery. When display
becomes dim, faded or the low battery
message appears, the battery needs to
be replaced. Reference the Maintenance
Section for details.
Batch and Cumulative Totals
The computer maintains two totals. The
Cumulative Total provides continuous
measurement and cannot be manually
reset. The Batch Total can be reset to
measure ow during a single use. The
Cumulative Total is labeled TOTAL 1,
Batch Total is labeled TOTAL 2 BATCH.
When the Cumulative Total reaches a
display reading of 999,999 the computer
will highlight an X10 icon. This indicates to
the operator that a zero must be added to
the 6 digits shown. When the next rollover
occurs, the computer will highlight an X100
icon. This indicates to the operator that two
zeros must be added to the 6 digits shown.
Press the DISPLAY button briey to switch
between the TOTAL 1, TOTAL 2 BATCH
and FLOWRATE (if applicable). Press
DISPLAY briey to display the TOTAL 2
BATCH. Hold the DISPLAY button for 3
seconds to reset the Batch Total to zero.
When uid is owing through the meter, a
small propeller icon is highlighted.
Flowrate Feature
Some models have a 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 ow.
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 meters are congured with “factory”
calibrations of multiple units. 120000-1,
FM300H-G has gallons and litres.
120000-2, FM300H-L has litres and impe-
rial gallons. While holding the CALIBRATE
button, briey press DISPLAY to toggle
between Gallons (GL), Litres (LT) and/or
Imperial Gallons (IGL). The unit chosen will

FM-300H & FM-300HR / 920679-06E 5
become the meter’s default after one min-
ute. These factory calibrations (indicated
by FAC) are permanently programmed into
the computer and are not user adjustable.
The “eld” calibration may be set by the
user, and can be changed or modied at
any time using the calibration procedure
described in the Calibration Section.Totals
or owrate derived from the eld calibra-
tion 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 owmeter during
production, and are correct for light uids
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, vis-
cosity, temperature, and owrates all effect
meter accuracy. To ensure accuracy, it is
important to check accuracy frequently and
eld calibrate when necessary.
Field Calibration Procedures
(Dispense/Display Method)
1. To eld 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 eld calibration mode.
2. Dispense a known amount of uid at
a owrate representative of the ap-
plication.Any amount between .1 and
999.9 units can be used. Display will
count up while uid is owing through
the meter.
3. The DISPLAY button can then be
pushed to select the digit location and
the CALIBRATE buttoncan be pushed
to scroll the desired value at the blink-
ing position. Edit the amount shown
with the value that was dispensed
above. Values from 000.1 to 999.9
can be entered.
4. When satised 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 (fac-
tory 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 eld calibration mode is en-
tered and NO uid is dispensed,
then upon leaving, the computer will
use data from the last successful
eld calibration.
Calibration Container
The desired calibration container should be
uniformly dependable and constructed with
a graduated neck. The container’s volume
indicator should be clearly and precisely
marked. It is helpful if the container’s ma-
terial allows a window through which the
level of liquid can be viewed. GPI offers
a properly designed calibration container
for volumes of 5 gallons or 5 litres.
DO NOT use several smaller containers or
a larger container with a 5-gallon marking.
For the most accurate results, dispense at
owrates that best simulate your actual op-
erating conditions. Avoid “dribbling” more
uid or repeatedly starting and stopping
the ow. These actions will result in less
accurate calibrations.
During calibration, make sure you meet the
meter’s minimum owrate requirements of
2 GPM (7 LPM).
Before calibrating, purge the system of
air using instructions in the Before Each
Use section.
MAINTENANCE
This meter is virtually maintenance free.
It is important, however, that the nutator
disc moves freely.
To prevent drying of chemical on internal
assemblies, meters should be kept free

6FM-300H & FM-300HR / 920679-06E
Figure 2
FIGURE 2
2. Tap the screws with a hammer to
loosen the coverplate from the hous-
ing. (Figure 3) Remove the screws
and washers.
FIGURE 3
3. Gently pry the coverplate from the
housing. Take care not to damage
the coverplate, housing, or O-ring.
(Figure 4)
FIGURE 4
4. Remove the signal generator from
the pin on the nutator disc.
(Figure 5)
of chemical when not in use for extended
periods of time. Flush and clean after each
use to promote trouble-free operation.
Removal
During meter removal, chemical may
spill. Follow the chemical manu-factur-
er’s safety precautions for cleanup of
minor spills.
WARNING
1. Ensure all chemical is drained from
the meter. This could include draining
the hose, meter and nozzle.
2. Wearing protective clothing, loosen
the meter from ttings by hand.
To avoid damage to the housing, do
not use a wrench.
CAUTION
If the meter is not immediately installed
again, cap the hose end to prevent spills
and drying. The nozzle could be used for
this purpose. Flush the meter if it will not
be in use for more than two weeks.
Flushing
When removed or not in use for more
than two weeks, ush the meter to remove
chemical residue.
Do not submerge the meter.
CAUTION
If needed, clean the meter using Cleaning
instructions.
Cleaning
During use, the meter should be kept free
of liquid to ensure drying does not occur
inside the meter. If drying should occur,
the nutator will stick or drag, affecting ac-
curacy. If this occurs, cleaning is required.
Cleaning the Nutator
1. Loosen the screws on the back of
the meter about 1/4 inch (0.6 cm).
(Figure 2)

FM-300H & FM-300HR / 920679-06E 7
FIGURE 5
5. Gently remove the metal clips holding
the nutator in place. (Figure 6) Take
care not to damage the O-ring on the
nutator inlet.
FIGURE 6
6. Remove the nutator.
7. Using water or a solvent-based uid
and a brush, carefully remove residue
from the nutator disc, nutator halves,
signal generator, and inside of hous-
ing. Allow all parts to dry.
Do not submerge the meter.
CAUTION
8. When the nutator turns freely, as-
semble and install following the
instructions below.
Assemble Nutator
1. Assemble the nutator disc and nuta-
tor halves. Install the O-ring on the
nutator inlet.
2. Install the nutator in the meter hous-
ing. Make sure the nutator O-ring ts
properly against the meter inlet.
3. Secure the nutator with the metal clips.
Beginning opposite the inlet, install a
clip in each slot in the housing. Push
each clip down rmly until seated.
4. Place the signal generator on the
nutator pin. Make sure it rotates freely
on the pin.
5. Coat the O-ring lightly with bearing
grease and seat securely on the
coverplate.
6. With the display facing up, turn the
coverplate to the desired orientation.
Align holes on coverplate and hous-
ing.
7. Secure the coverplate by evenly
tightening screws to 25 to 35 in. lbs.
Storage
After thoroughly cleaning the meter, dis-
connect the battery and store the meter
in a clean, dry location.
Battery Replacement
Your meter is equipped with a eld-
replaceable 9-volt alkaline battery.
If the meter’s readout should become dim,
blank, faded, or the low battery message
appears, replace the battery.
Batch and Cumulative Totals, as well as,
Factory and Field Calibrations are not lost
when the battery is replaced or power
is lost. They are saved in the meter’s
computer and are available after a new
battery is installed. You do not need to
repeat Field Calibration.
Check the battery and terminals at least
every year to ensure proper operation. It
is strongly recommended that terminals
be cleaned annually.
Note: The battery can be replaced without
removing the meter from the hose
or pipe.

8FM-300H & FM-300HR / 920679-06E
To replace battery or clean
terminals:
1. Remove the two large and two small
screws from the battery coverplate
located on the lower portion of the
meter face. (Figure 7)
FIGURE 7
2. Remove the battery coverplate and
gasket. (Figure 8)
FIGURE 8
3. Remove the battery and, if necessary,
clean corrosion from the battery termi-
nals. (Figure 9) To prevent corrosion
from condensation, coat the terminals
with petroleum jelly.
FIGURE 9
4. Install the new battery.
When the battery is installed correctly,
the computer powers on automati-
cally. Check the readout to make sure
normal meter functions have resumed
before assembling again. If neces-
sary, seat the battery again.
5. Make sure the coverplate gasket is in
good condition and properly seated.
Replace, if needed.
6. Replace the battery cover. Torque the
screws to 9 to 10 in. lbs.
End of Season
To ensure proper operation, the meter
should be cleaned prior to extended
periods of inactivity and at the end of the
season before storage. Disconnect the
battery before storage.
For Technical Assistance call:
1-800-835-0113

FM-300H & FM-300HR / 920679-06E 9
TROUBLESHOOTING
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
A. METER IS NOT
ACCURATE
1. Field Calibration not
performed properly
Field calibrate again or select Factory Calibra-
tion.
2. Factory Calibration not
suitable for liquid being
measured
Perform a Field Calibration according to Calibra-
tion Section.
3. Meter operated below
minimum owrate
Increase owrate. See Specications Section.
4. Meter partially clogged
with dried liquid
Remove meter. Disassemble and carefully clean
dried chemical from the nutator. Make sure the
nutating disc moves freely. Assemble again.
5. Thread tape or other
material in ow path
Remove meter. Clear material from ow path
and seal ttings. Install again.
6. Nutator misaligned Disassemble meter and install nutator again.
Ensure O-ring and retainer clips are in place.
B. READOUT
FADED OR
BLANK
1. Batteries weak, dead or
not connected
Replace battery. Install again, making sure the
gasket seats evenly around the coverplate.
2. Battery terminal cor-
roded
Clean corrosion from the terminals.
3. Computer defective Contact the factory.
C. NORMAL
FLOWRATE
BUT METER
DOES NOT
COUNT (comes
on when display
button pushed.)
1. Field Calibration not
performed correctly
Field calibrate again or select Factory Calibra-
tion.
2. Nutator misaligned Disassemble meter and install nutator again.
Ensure O-ring and retainer clips are in place.
3. Signal generator disc
missing or damaged
Replace signal generator disc. Contact the
factory.
4. Computer defective Contact the factory.
D. REDUCED
FLOWRATE &
METER DOES
NOT COUNT
(comes on when
display button
pushed.)
1. Meter clogged with
dried liquids
Remove meter. Disassemble and clean dried
chemical from the nutator. Make sure the nutat-
ing disc moves freely. Assemble again.
E. CANNOT GET
METER INTO
FIELD CALIBRA-
TION
1. Button push sequence
incorrect
Make sure CALIBRATE is held down while
DISPLAY is pushed. Hold both buttons for 3
seconds. Readout will then show dd-000.0.
Release both buttons. Proceed with calibration
according to Calibration Section.
2. Computer circuit board
defective
Contact the factory.
F. METER CON-
NECTION LEAK
1. Meter installed without
thread sealant
Remove meter. Wrap male connections with 3
to 4 wraps of thread tape or compatible sealing
compound. Install again.
2. Connecting threads
damaged
Remove meter and inspect threads. Replace
damaged connections. If threads are damaged,
contact the factory.
3. Screws on back of
meter loose
Tighten screws. Torque to 25 to 35 in. lbs.
4. Coverplate O-ring
missing, damaged, or
improperly installed
Install O-ring on coverplate again.
5. Meter housing cracked Inspect housing for cracks. If cracks present,
contact the factory

10 FM-300H & FM-300HR / 920679-06E
ILLUSTRATED PARTS LIST
Item No.
No. Part No. Description Req’d.
1 120505-1 Housing Kit .......................... 1
1-A 904004-19 Screw, 1/4-20 x 1-3/4 in....... 4
1-B 904005-29 Washer, 1/4 in...................... 4
2 120503-1 Nutator Kit ........................... 1
2-A 111045-4 Nutator Seal ........................ 1
3 120013-1 Clip ...................................... 4
4 120504-1 Signal Generator Kit ............ 1
5* 120502-11 Coverplate Assy Kit, gallon.. 1
120502-18 Coverplate Assy Kit, litre ..... 1
Item No.
No. Part No. Description Req’d.
5-A 901001-78 O-ring .................................. 1
6 902004-20 9 Volt Transistor Battery ...... 1
7* 120501-3 Battery Cover and
Gasket Kit............................ 1
7-A 904005-28 Self-Sealing Screw,
1/4-20 x 5/8 in...................... 2
7-B 904005-27 Sems Screw,
6-32 x 3/8 in......................... 2
7-C 120028-1 Gasket ................................. 1
* The Battery Cover and Gasket Kit, Item 7, is included in the Coverplate Assembly Kit, Item 5.

FM-300H & FM-300HR / 920679-06E 11
SPECIFICATIONS
Applications
Flow Range: 2-20 GPM (7-75 LPM)
Operating Environment: Outdoor, oper-
ating temperature range of 0° F
to +130° F (-18° C to +54° C). Elec-
tronic Nutating Disc designed for
mounting on hoses or pumps of uid
transfer systems.
Power: 9 Volt alkaline battery
Maximum Working Pressure: 50 PSIG
(3.4 bar)
Maximum Display Value:
999,999 (x100)
Accuracy
Factory Calibration: ± 2%
Field Calibration: ± 0.5%
Materials
Housing: PBT Polyester
Seals: Viton
Wetted Parts: PBT Polyester, 303/304
Stainless Steel, Ferrite
Mechanical
Inlet: 1 inch NPT female
Outlet: 1 inch NPT male
Dimensions
Height: 4 inches (10.3 cm)
Depth: 3.1 inches (8.1 cm)
Width: 6 inches (15.2 cm)
Shipping Weight
3 lbs. (1.4 kg)
Storage Temperature
-40° F to +158° F (-40° C to +70° C)
SERVICE
For warranty consideration, parts, or other
servicing information, please contact your
local distributor. If you need further as-
sistance, call the GPI Customer Service
Department in Wichita, Kansas, during
normal business hours.
1-800-835-0113
To obtain prompt, efcient service, al-ways
be prepared with the following information:
1. The model number of your meter.
2. The serial number or manufacturing
date code of your meter.
3. Specic information about part num-
bers and descriptions.
For warranty work always be prepared with
your original sales slip or other evidence
of purchase date.
Returning Parts
Please contact the factory before returning
any parts. It may be possible to diagnose
the trouble and identify needed parts in
a telephone call or letter. GPI can also
inform you of any special handling require-
ments you will need to follow covering the
transportation and handling of equipment
which has been used to transfer hazard-
ous liquids.
Do not return meters without specic
authority from the GPI Customer
Service Department. Due to strict
regulations governing transporta-
tion, handling, and disposal of haz-
ardous liquids, GPI will not accept
meters for rework unless they are
completely free of chemical.
CAUTION

© 2014 Great Plains Industries, Inc. All Rights Reserved. is a trademark and GPI
®
is
a registered trademark of Great Plains Industries, Inc.
Limited Warranty Policy
Great Plains Industries, Inc. 5252 E. 36
th
Street North, Wichita, KS USA 67220-3205, hereby
provides a limited warranty against defects in material and workmanship on all products
manufactured by Great Plains Industries, Inc. This product includes a 2 year warranty
from date of purchase as evidenced by the original sales receipt. A 30 month warranty
from product date of manufacture will apply in cases where the original sales receipt is not
available. Reference product labeling for the warranty expiration date based on 30 months
from date of manufacture. Manufacturer’s sole obligation under the foregoing warranties
will be limited to either, at Manufacturer’s option, replacing or repairing defective Goods
(subject to limitations hereinafter provided) or refunding the purchase price for such Goods
theretofore paid by the Buyer, and Buyer’s exclusive remedy for breach of any such war-
ranties will be enforcement of such obligations of Manufacturer. The warranty shall extend
to the purchaser of this product and to any person to whom such product is transferred
during the warranty period.
This warranty shall not apply if:
A. the product has been altered or modied outside the warrantor’s duly appointed
representative;
B. the product has been subjected to neglect, misuse, abuse or damage or has been
installed or operated other than in accordance with the manufacturer’s operating
instructions.
To make a claim against this warranty, contact the GPI Customer Service Department at
316-686-7361 or 800-835-0113. Or by mail at:
Great Plains Industries, Inc.
5252 E. 36
th
St. North
Wichita, KS, USA 67220-3205
GPI will step you through a product troubleshooting process to determine appropriate
corrective actions.
GREAT PLAINS INDUSTRIES, INC., EXCLUDES LIABILITY UNDER THIS WARRANTY
FOR DIRECT, INDIRECT, INCIDENTAL AND CONSEQUENTIAL DAMAGES INCURRED
IN THE USE OR LOSS OF USE OF THE PRODUCT WARRANTED HEREUNDER.
The company herewith expressly disclaims any warranty of merchantability or tness for
any particular purpose other than for which it was designed.
This warranty gives you specic rights and you may also have other rights which vary from
U.S. state to U.S. state.
Note: In compliance with MAGNUSON MOSS CONSUMER WARRANTY ACT – Part 702
(governs the resale availability of the warranty terms).
920679-06E04/14