Groz FM-20 User manual

[e-mail] 1 www.groz-tools.com
INSTRUCTION MANUAL
S1730, REV D
Meter type Digital
Meter MechanisM Turbine
inlet / Outlet pOsitiOn In-Line & End of the time
Male / FeMale pOrt size 1”
threads BSP or NPT
FlOw rate 5 to 120 LPM (1.3 to 32 GPM)
accuracy +/- 1%
repeatability +/- 0.30 %
Max. wOrking pressure 300 PSI (20 BAR)
burst pressure (Min.) 580 PSI (40 BAR)
wOrking teMperature range -10°C to 50°C (14° to 122°F)
Max. resettable batch tOtal 99999 Units
Max. nOn resettable tOtalizer 9,99,999 Units
least cOunt/ resOlutiOn 0.001 Unit
ViscOsity OF Media (range) 5.35 cSt
OptiOn tO recalibrate by user Yes
nO. OF pOsitiOns in which the display can be rOtated 4
prOtectiVe shrOud On Meter YES
water resistance IP65
ce listed YES
FOr use with graVity FlOw YES (Minimum 4 feet head is required)
pOwer supply 2 x 1.5V Alkaline batteries ( Size AAA )
pressure lOss 0.5 PSI (0.04 BAR)
Digital
Fuel Meter
Digital turbine meter designed to
measure the flow of low viscosity
fluids
Easy installation, both for in-line
as well as end of line applications;
with the advantage of Bi-
directional operation
Polyamide Turbine measuring
mechanism
Electronic Display powered by two
AAA 1.5 V batteries
Display can be rotated in four
dierent positions
Aluminum body and sealed
electronic card makes it suitable
for use in severe weather
conditions
Measures in Litres, Quarts, Pints &
Gallons
Easy user recalibration
WETTED COMPONENTS
Aluminum, Polyamide
RECOMMENDED USE
Diesel, Gasoline, Bio-Diesel,
Windshield Fluid, Water
DO NOT USE WITH
Oils
FM-20
Reset
Key
1" Port Meter Protective
Rubber Shroud
Calibration
Key 1" Port
SPECIFICATIONS
MAX. WORKING
PRESSURE
300 PSI
(20 BAR)
FLOW RATE
5-120
LPM
WORKING TEMPERATURE
RANGE
−10°C to 50°C
(14°F to 122°F)
FEATURES
FLUIDS
PETROLDIESEL BIO DIESEL
WINDSHIELD
FLUID WATER

www.groz-tools.com
2
WARNING
Do not use the meter without a fuel filter installed before the
meter.
INSTALLATION (REFER “EXPLODED VIEW” ON PAGE 6)
This is a bi-directional meter with 1” threaded male & female ports.
The meter can be installed in any position - fixed in line or mobile on
a control nozzle.
1. Remove the four screws (2) and separate the card housing (5)
from the turbine assembly (6).
2. Rotate the card housing in any of the four positions as shown in
the picture and tighten the card housing with four screws (2)
LCD DISPLAY: Powered by two alkaline batteries of 1.5 V each.
Includes three numerical TOTALs and other keys as given below:
1. Resettable Batch TOTAL (5 digits with moving comma):
indicates volume dispensed after RESET button was last
pressed.
2. Indication of battery charge.
3. Indication of calibration mode.
4. Totalizer (6 figures with moving comma in multiples of 10 &
100): indicates two types of TOTAL:
• Non-Resettable TOTAL (TOTAL)
• Resettable TOTAL (Reset TOTAL)
5. Indication of TOTAL multiplication factor (x10 or x100 ).
6. Indication of type of TOTAL, (TOTAL / Reset TOTAL).
7. Indication of unit of measurement of TOTALIZER:
L=Litres
Gal=Gallons
MAJOR COMPONENTS
Resettable
Batch Total
(Batch TOTAL)
Reset
Key
Calibration
Key
Non Resettable
Totalizer (TOTAL)
1"
Female
Port
1"
Male Port
1
2
3
4 5
6
7
8
FLOW RATE
8. Indication of unit of measurement of Resettable Batch
TOTAL:
Qts=Quarts
Pts=Pints
L=Litres
Gal=Gallons
FUNCTIONS:
User Buttons: The meter features two buttons (RESET and
CAL) which individually perform two main functions and together
perform other secondary functions.
• RESET key: is used to reset the Batch TOTAL and Reset
TOTAL
• CAL key: is used to enter calibration mode
• Combination of RESET + CAL keys: is used to change the
unit of measurement and other secondary functions.
Turbine Assembly: It has two threaded ports: 1 male & 1 female. It
contains a turbine which turns when media passes through it at
sucient pressure. This action generates electrical pulses which
are processed by a microprocessor and the result is displayed on
the LCD.
WHAT IS STANDBY?
When the media is not flowing through the meter, the meter
shows only the word TOTAL on the display. This mode is called
STANDBY and majority of adjustments are carried out in this
mode.
MEASUREMENT UNITS CONFIGURATION
The user can select the main measurement unit, Quarts (Qts),
Pints (Pts), Litres (L), Gallons (Gal); according to the following
predefined combinations:
Note: Last dispensed quantity can be brought to zero by
pressing and holding the RESET button.
Non Resettable
TOTAL
Last dispensed
quantity 12,435
1345,6TOTAL
Standby
Mode
reF. nO unit OF MeasureMent
resettable batch tOtal
unit OF MeasureMent
batch tOtalizer
1Litres (L) Litres (L)
2Gallon (Gal) Gallon (Gal)
3Quarts (Qts) Gallon (Gal)
4Pints (Pts) Gallon (Gal)
SEQUENCE OF SETTING THE UNIT OF MEASUREMENT
1. Wait for the METER to
go to Standby Mode.
2. Press the CAL and
RESET keys together.
Hold it until the word
“UNIT” appears on the
screen together with
the current unit of
measurement.
Unit QTS
GAL
12,345
123456
QTS
GAL
TOTAL
3. Press RESET key to scroll among the four combinations of
units of measurement as shown:
L
L
R RR
Positions

[e-mail] 3
While the media is flowing through the meter, Batch Total and
Reset Total are displayed at the same time.
A few seconds after dispensing has ended, the display switches
from Reset TOTAL to TOTAL: the word RESET above the word
TOTAL disappears, and the Reset TOTAL is replaced by TOTAL.
Note: This situation , where only “TOTAL” is displayed, is called
STANDBY mode. It remains stable until the user operates the
meter again.
12.3 TOTAL
0,000
12.3 TOTAL
0,000
25.2 TOTAL
0,000
NORMAL DISPENSING MODE
RESETTING THE BATCH TOTAL
4. Press CAL key for more
than 2 seconds to store
the new settings. The
METER will return to the
Stand by Mode.
12.3 Reset
TOTAL
12,345
12.3 TOTAL
12,345
12.3 TOTAL
12,345
Note: No new calibration is required after changing the Unit of
Measurement.
25.2 TOTAL
12,345
0.0 TOTAL
0.000
25.2 TOTAL
12,345
3. After resetting, the
display shows zero value
on Resettable Batch
TOTAL
1. While in standby (i.e
when the display shows
TOTAL), press the
RESET button.
2. During reset, the display
screen shows all the lit-
up digits.
4. After a few moments,
the Reset TOTAL is
replaced by TOTAL.
RESETTING THE RESET TOTAL
The Reset TOTAL can be reset by pressing the RESET key at
length while the display screen shows Reset TOTAL. The steps to
be taken are:
1. Wait until the display
shows TOTAL only
(standby mode)
2. Press the RESET key.
The display screen again
shows all the segments
of the display followed
by all the switched-o
segments.
3. While the display page
showing the Reset
TOTAL is displayed,
press and hold the
Reset key again till the
Resettable TOTAL turns
to zero.
4. Finally the page with
the new Reset TOTAL is
displayed.
CALIBRATION
In standby mode, press and hold the CAL key to see the current
calibration factor.
• Factory K Factor: Factory-set default factor.
It is equal to 1 (indicated as 1,000).
• User K Factor: Customized calibration factor, meaning
modified by calibration.
The meter has been calibrated at the factory under the following
operating conditions:
Fluid : Diesel fuel
Temperature : 20°C (68° F)
Flow rate : 10-120 litres/min
Calibration is needed to make the meter suitable for actual
conditions.
Note: Calibration must be done if there is change in any of the
above operating conditions.
CALIBRATION PROCEDURES
1. In-Field Calibration
2. Direct Calibration
By pressing the CAL key while the meter is in Standby, the display
shows the current calibration factor used. Two cases can occur:
1,000
Cal FACT
CASE 1: “FACT”
If no calibration has ever been
performed, or the factory setting
has been restored after previous
calibrations, the following
display page will appear:

www.groz-tools.com
4
To confirm the choice of calibration factor, quickly press CAL
while “User” or “Fact” are displayed.
IN-FIELD CALIBRATION SEQUENCE
1. Wait until the METER
comes in Standby
(Display shows TOTAL).
2. Press CAL key for more
than 2 seconds. The
METER enters calibration
mode and shows “CAL”.
The words “FACT” or
“USER” indicate which
factor (factory or user) is
currently in use.
3. Press and hold RESET
key. The METER
shows“FIELD” and the
Batch Total at zero.
The meter is ready
to perform in-field
calibration.
0,000
Cal FIELD
9,800
Cal FIELD
12,345
12,5 TOTAL
1,000
Cal
FACT
1,000
Cal
USER
4. Dispensing into sample
container Without
PROCESS FOR IN-FIELD CALIBRATION
9.86
9,800
Cal FIELD
5. Press RESET key once
.The METER detects that
the calibration dispensing
is finished. An arrow (up/
down) appears which
indicates the direction in
which the value can be
changed via steps 6 & 7.
To calibrate the METER,
the value indicated by
the Batch total (example
9.800) must be forced to
the Container value 9,860
marked on the graduated
sample container.
6. Press RESET key once.
The arrow changes
direction. The operation
can be repeated to
alternate the direction of
the arrow.
7. Press “CAL” key to
change the value in the
direction indicated by
the arrow. The reading
changes 9,860
Cal FIELD
-----
Cal END
1,015
Cal END
0,000
12145
9,800
Cal FIELD
8. Press and hold RESET
key for more than 2
seconds. The METER
is informed that the
calibration procedure
is finished. The meter
calculates the new USER
K FACTOR factor for a
few seconds.
9. The new USER K
FACTOR is shown for
a few seconds, after
which the restart
cycle is repeated to
finally achieve standby
condition.
10. The METER stores the
new calibration factor
and is ready to begin
dispensing.
DIRECT CALIBRATION SEQUENCE
If normal METER operation shows a mean percentage error
E, (obtainable on the basis of several performed dispensing
operations), this can be corrected by applying a correction to the
current calibration factor as shown below :
New cal. Factor = Old Cal Factor x 100 - E%
100
Example:
Error percentage found E% = - 0.3 % (value observed is 0.3% less
than actual)
CURRENT calibration factor = 1.000
New USER K FACTOR = 1.000 * [(100 – ( - 0.3))/100]
= 1.000 * [(100 + 0.3)/100]
= 1.003
{ {
• by one unit for
every short press of
CAL key.
• continually if the
CAL key is kept
pressed.
Note: The word “Fact” abbreviation for “factory” shows that the
factory calibration factor is being used.
CASE 2: “USER”
If, on the other hand,
calibrations have been made
by the user, the display page
will appear showing the
currently used calibration
factor (in our example
0,998).
Note: The word “user” indicates that a calibration factor, set by
the user is being used.
pressing any key, start
dispensing into the
sample container.
Container
Value
Meter Value
0,998
Cal FACT
Continue dispensing until
the level of the fluid in
the sample container has
reached the graduated
area.

[e-mail] 5
1. Wait until the METER
comes in Standby
(Display shows TOTAL).
2. Press and hold CAL key.
The METER enters
calibration mode and
shows “CAL”. The words
“Fact” or “USER” indicate
which factor (factory or
user) is currently in use.
3. Press and hold RESET
key. The METER shows
“CAL”, “Field” and the
Batch Total at zero.
The meter is ready to
perform in- field
calibration.
4. Press and hold RESET
key. “Direct” appears
together with the
Current calibration
factor. An arrow
appears (upwards or
downwards) defining the
direction (increases
or decreases) of the
reading.
5. By pressing RESET key
the user can change the
direction of the arrow.
6. By pressing CAL
key, the Meter value
changes in the direction
indicated by the arrow,
• one unit for every short
press of CAL key.
• continually if the CAL
key is kept pressed. The
7. Press RESET key for
more than 2 seconds.
The METER detects
that the desired reading
has been set and the
calibration procedure is
finished.
8. At the end of the
calculation, the new
USER K FACTOR is
shown for a few seconds.
12,345
12.5 TOTAL
1,000
FACT
USER
Cal
0,000
Cal FIELD
1,000
Cal DIRECT
1,000
Cal DIRECT
1,003
Cal DIRECT
-----
Cal DIRECT
1,003
Cal END
12,345
12.5 TOTAL
MAINTENANCE
The Meter has been designed to require a minimum amount of
maintenance.
The only maintenance jobs required are:
• Battery change: Necessary when the batteries have run
down
• Cleaning the turbine assembly: Due to the presence of solid
particles following bad filtering.
1. When the battery charge
falls below the first level
on the LCD, the fixed
battery symbol appears.
In this condition, the
METER continues to
operate correctly, but the
fixed icon warns the user
that it is time to change
the batteries.
CHANGING THE BATTERY
The METER features two low-battery alarm levels
12,345 QTS
GAL
2342,3
TOTAL
BATTERY REPLACEMENT PROCEDURE:
• Press RESET to update all the totals
• Remove the four screws (10) and separate the battery cap (9).
• Remove the old batteries.
• Place the new batteries in the same position as the old ones,
making sure the positive pole is positioned as indicated.
• Re-tighten the battery cap (9) & tighten the screws (10).
• The METER will switch on automatically and normal operation
can be resumed.
Note: The old calibration will stay same as before.
2. If meter operation
continues without
changing the batteries,
the second battery alarm
level will be reached
which will prevent
any operation. In this
condition the battery icon
starts to flash and is the
only one to remain visible
on the LCD.
CLEANING OF THE TURBINE ASSEMBLY
After removing the meter from pipes, any residual elements can
be removed from the turbine by simply washing it with water.
WARNING
Always make sure the liquid has been drained from the meter
and the line pressure is released before cleaning.
Never use compressed air for cleaning as it may damage the
turbine assembly.
speed increases
or decreases by
keeping the key
pressed.
9. The restart cycle is
repeated to finally
achieve standby mode.

Groz Engineering Tools (P) Ltd.
Groz Net Industries
Village Kherki Daula, National Highway-8,
Gurgaon-122001, Haryana, INDIA
Tel [phone]
Fax [phone]
E-Mail [e-mail]
Url www.groz-tools.com
The GROZ name, GROZ logo and the mark are
trademarks of Groz Engineering Tools (P) Ltd., India
reF. nO. parts descriptiOn
1Meter Label
2Screw (Nos. 4)
3Display with Microprocessor
4Rubber Shroud
5Card Housing
6Turbine Assembly (as a Single Unit)
7Batteries
8Battery Case
9Battery Cap
10 Screw (Nos. 4)
prObleM cause sOlutiOn
No indication on display Bad battery contact Check battery contacts
Inaccurate measurement
Wrong Calibration Follow CALIBRATION procedure
The meter is working below minimum acceptable
flow rate
Increase the flow rate until an acceptable flow rate
range has been achieved
Reduced or zero flow rate TURBINE blocked Clean the TURBINE
The meter does not count, but the flow rate is correct Incorrect installation of the card Reinstall the card
Possible electronic card problems Contact your dealer
TROUBLESHOOTING
EXPLODED VIEW
PARTS LIST
7
8
9
3
5
4
1
2
10
6