GPI LM50DB, LM50DN Instruction Manual
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LM50DB / LM50DN (ELECTRONIC)
INSTRUCTION MANUAL
This meter is designed for in line use with Engine Oil & A TF
up to a maximum viscosity of SAE 140, Diesel & Water Glycol mixtures with a maximum water content of less than 50%.
Please read and retain this instruction manual to
assist you in the operation and maintenance of this
quality product.
GENERAL INFORMA TION
This manual assists you in operating and maintaining your
new positive displacement flowmeter. The information
contained will help you ensure many years of dependable
performance and trouble free operation.
Please take a few moments to read through this manual before
installing and operating your new meter. If you experience
problems with this product, refer to the Maintenance and
Trouble Shooting sections of this manual. If you require
further assistance please contact your local GPI
Distributor.
IMPORTANT INFORMA TION
The GPI quality Positive displacement flowmeter has
incorporated the oval rotor principal into its design. This has
proven to be a highly reliable and highly
accurate method of measuring flow, pr oviding exceptional
repeatability and high accuracy .
GPI recommends, that if you are using your meter as an inline application you should install a filter
before the inlet of the meter. Contact your local GPI distributor
for further details.
INSTALLATION
2) Do not over tighten connections.
0002
OPERATION
LM50DB or LM50DN ELECTRONIC REGISTER
DISPLA Y BUTT ON
Each press of the DISP button will allow you to scroll through
the meter options
Resetable Batch T otal
Resetable Accumulative T otal
Non Resetable Accumulative T otal
Flowrate
RESET BUTTON
The RESET button allows you to reset the Batch T otal or the
Resettable Acumulative T otal to zero.
To reset either the Batch total or Resetable Acumulative total.
Press the DISP button to scroll to either the Batch or Resetable
total . When the required total is displayed. Press reset to zero
the totalizer.
FLOWRATE
This display option shows the flowrate of the fluid
passing through the meter.
IM083
0106
POSITIVE DISPLACEMENT FLOWMETERS
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CAUTION
METER DISASSEMBLY
P A RTS DIAGRAM
Ensure the fluid supply to the meter is disconnected and
the line pressure is released befor e disassembly.
METER REASSEMBLY
1) Replace both rotors (4) so as they are at 90O to each other.
(see fig 2). Check the rotor rotation by turning either of the
rotors. If the rotors are not in mesh correctly or do not
rotate freely remove one of the rotors and replace it
correctly at 900 to the other rotor. Re-check the operation of
the rotors.
5) Test the meter by turning the rotors with a finger or by
applying low air pressure (No more than a good breath)
to the inlet port of the meter. This will confirm the meter
is operating correctly .
1
2
5
6
7
4
3
PARTS LIST
BA TTERY REPLACEMENT
1) Remove the plastic protector shroud from the meter
body. (fig 1)
3) Replace the 2 x (AAA) Alkaline batteries. (Refer to the
front of the meter for correct battery orientation).
Note: Only use Alkaline batteries.
If NO flow goes through the meter for 60 seconds the display
will go into sleep mode (Blank). The display will
automatically wake if the buttons are pressed or flow occurrs.
SLEEP MODE
Note: The electronic computer module is non-repairable. The
meter will need to be replaced if found to be damaged or faulty.
1) Remove the 8 x philips head screws (1) from the meter
cover.
2) Remove the meter cover (2) and o’ring (3).
3) Remove both rotors (4).
4) Clean and inspect all parts. Replace any suspect, worn or
damaged components.
NOTE: Ensure the rotor with the magnets is assembled on
the same side as the batteries. The magnets in the rotor must
face towards the electronic display .
The Rotor with Magnets
( fig 2)
(fig 1)
magnets
Note: Replace the batteries as soon as the battery
indicator on the LCD is displayed
+
-
2) Remove the battery cover.
4) Replace the battery cover and re-fit the plastic shroud.
All data will be saved when the batteries are removed.
2) Lightly grease the o’ring (3) and place it on the meter body.
3) Clean the meter cover plate (2) and place it on the body.
T ake care not to damage the o’ring (3).
4) Install the 8 screws (1) and tighten in a diagonal pattern to
1nm (0.73 ft.lb). Visual check the cap has been pulled down
evenly.
Protector Shroud
(fig 3)
ORDER FOR REPLACEMENT
ITEM PART NO No. of f PART/ SET DESCRIPTION
1 N65 8 LM50K02 SCREW SET
2 IM011 1 METER COV ER PLATE SET
3 BS035 1 LM50K01 O'RING SEAL
4IM020 2 ROTOR SET
5 1 N/A METER BODY
6 2 N/A BATTERY SET
7 1 N/A BATTERY COVER SET
8 IM070-BLUE 1 LM50K03 PROTECTOR SHROUD SET
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ELECTRONIC MODULE
PROGRAMING DETAILS
c) To access the programs and settings, hold down the RESET button for 5 seconds
d) T o scroll through the setting options press theDISP button.
The electronic module has been set up as follows:-
totL 2
rAtE 3
diSP 4
CALI 5
CONF 6
dIA 7
2. TOTALS
3. FLOWRATE
4. DISPLAY
5. CALIBRATION
6. CONFIGURATION
7. DIAGNOSTICS
NOTE: Details for changing individual options .
For example to change the units setting on the batch total turn to item 2 - 21
21 change batch total (units)
23 change resetable accumulative total (units)
24 change resetable accumulative total (decimal point)
25 change non-resetable accumulative total (units)
26 change non-reset accumulative total (decimal point)
22 change batch total (decimal point)
27 change “K” factor
31 change flowrate (units)
32 change flowrate (decimal point)
33 change flowrate (time base setting)
34 set the amount of signal pulses to calculate flowrate
35 set minimum flow rate
41 set sleep mode
43 set sleep time
42 change display (wake up default setting )
51 calibration adjustment
6 configuration details
71 diagnostic mode
a) Ensure the meter is awake before trying to enter the programming mode.
b) If the meter goes into sleep mode during programming, it will automatically
return to operating mode.
totL 2
Note: As the decimal point does not float we recommend that a maximum of 2 decimal
places be used, see below for details.
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