Macnaught M50 Series User manual

MS244BR
0902
0002
Positive Displacement Flowmeters
M50 Modular series instruction manual
M50 Pulse • M50 Standard LCD • M50 Deluxe LCD • From serial No. CXXXX
The experts in fluid technology

PLEASE READ THIS INFORMATION
CAREFULLY BEFORE USE!
Before use, confirm the fluid to be used
is compatible with the meter. Refer to
industry fluid compatibility charts or
consult your local representative for
advice.
To prevent damage from dirt or foreign
matter it is recommended that a Y or
Basket type 60 mesh strainer be
installed as close as possible to the
inlet side of the meter. Contact your
local representative for advice.
Note: When a strainer is installed it
should be regularly inspected and
cleaned. Failure to keep the strainer
clean will dramatically effect flow
meter performance.
Note: To prevent damage caused by air
purge slowly fill the meter with fluid.
To reduce pressure build up turn off the
pump at the end of each day.
Maintenance can be carried out to the
liquid crystal displays and pulse units
without removing or isolating the meter
from the line. When maintenance to
any other part of the meter is required,
the meter must be isolated and the line
pressure reduced.
The reed switch pulse unit can cause
inaccurate rate counts when used with
high speed counters. It is advised that a
debounce circuit be used. Contact your
meter distributor for further
information.
When fluid passes through the meter
the rotors turn, as shown below. The
magnets which are located in the rotors
will pass across the pulser circuit board
(containing either Reed switches or
Hall Effect sensors). A signal is
generated which is then sent by the
Pulse Circuit Board (PCB) to the
relevant LC display or receiving
instrument.
Operating Principle
Please take a few minutes to read
through this manual before installing
and operating your meter. Always
retain this manual for future reference.
If you have any problems with the
meter, refer to the maintenance and
trouble shooting sections of this
manual.
This manual contains connection and
operating instructions for meters with
Pulse outputs and Liquid Crystal
Displays. Each model with a Liquid
Crystal Display has an additional LCD
instruction manual supplied. If you
need further assistance, contact your
local representative or distributor for
advice.
This Flow Meter has incorporated the
oval rotor principal into its design. This
has proven to be a reliable and highly
accurate method of measuring flow.
Exceptional repeatability and high
accuracy over a wide range of fluid
viscosities and flow rates are features of
the oval rotor design. With low
pressure drop and high pressure rating
oval rotor flow meters are suitable for
both gravity and pump (in line)
applications.
The modular M50 series meters are
only available in either Aluminium,
Bronze or Stainless Steel. Standard
rotors are also made from PPS with
optional 316 Stainless Steel rotors
available for both SS and Aluminium
models.
Meters are available with either;
* Pulse output
* Standard LC Display and Pulse
* Deluxe LC Display and Pulse
1
To the owner
Important Information

1] it is recommended that when setting
up pipework for meter installations a
bypass line be included in the design.
This provides the facility for a meter
to be removed for maintenace
without interrupting production. (See
Fig.1)
2] Use thread sealant on all pipe
threads.
3] For pump applications ensure pipe
work has the appropriate working
pressure rating to match the pressure
output of the pump. See Meter
Specifications section for further
details.
4] Install a wire mesh strainer (Y or
basket type 60 mesh as close as
possible to the inlet side of the meter.
5] Ensure that the meter is installed so
that the flow of the liquid is in the
direction of the arrows embossed on
the meter body.
6] The meter can be installed in any
orientation as long as the meter shafts
are in a horizontal plane. (Refer to
Fig.2 for correct installation) The
register assembly may be orientated
to suit the individual installation.
Note: Incorrect installation can cause
premature wear of meter components.
7] Do not over tighten meter
connections.
8] It is important that after initial
installation you fill the line slowly,
high speed air purge could cause
damage to the rotors.
9] Test the system for leaks.
10] Check the strainer for swarf or
foreign material, after the first 200
litres check periodically,
particularly if the flow rate
decreases.
2
Installation
1
2
Bypass Line
Flow Outlet
Flow Inlet
Strainer
Do Not Install Meter This Way
Electrical Connections
Contact rating 15VA
Maximum Voltage 150VDC
Note: Double rate pulse output not available 34
Reed/Hall combination
1 - Reed Switch
2 - Reed Switch
3 - HE Common -
4 - HE Signal
5 - HE Supply +
Hall/Hall Combination
1 - HE1 Supply +
2 - HE1 Signal
3 - HE Common -
4 - HE2 Signal
5 - HE2 Supply +
Hall Effect Voltage 4.5 to 24 VDC
Current Draw Minimum 4.6mA
Output NPN Open Collector 25mA
Note: Std. & Deluxe LCD must be driven by a Reed switch
Reed Switch Connections Hall Effect or Reed/Hall Sensor Connections

Disassembly
Ensure that the fluid supply to the
meter is disconnected, and the line
pressure is released before
disassembly, with the exception for
repair or maintenance to the LC
Display or PCB where there is no
necessity to isolate the meter from flow.
Refer to the exploded parts diagram on
subsequent pages for item numbers.
1a] Pulse Caps models: Undo the
conduit connector, remove pulse
cap (item 9) and remove the wires
from the pulse terminal board (item 5).
1b] Standard LC Display: Mark the
display orientation with a marking
pen, unscrew the four large screws
(Item 26) on top of the LC Display.
Carefully separate the LC Display
from the plastic housing and
disconnect the wires from the
pulse terminal block. (Refer to
additional Standard LC Display
instruction manual).
1c] Deluxe LC Display: Mark the
display orientation with a marking
pen, remove the four retaining
screws on the display face (Item
16). Lift off the display unit and
remove the 9 pin connector at the
back of the display unit. (Refer to
additional Deluxe LC Display
instruction manual).
2] Remove the mounting adaptor plate
and gasket (Item 14).
3] Loosen the cap head screws (Item 7)
that hold down the meter cap (Item
4), remove the screws, washers and
lift off the cap.
4] Remove the o’ring (Item 2) from the o’ring
groove in the meter cap (Item 4).
5] Remove rotors (Item 3). Note the
position of the timing marks.
Reassembly
1] Before reassembling check the
condition of the rotors (replace if
necessary).
2] Check that the plug side of the rotors
is facing you when inserting the
rotors, the plug side of the rotor is
the magnet side. There is no
difference between rotor one or
rotor two.
3] Replace the rotors (Item 3) onto the
shafts at 90oto each other (refer Fig.
5). Check the operation of the rotors
by turning either by hand. If the
rotors are not in mesh correctly or
do not move freely, remove one of
the rotors and replace correctly at
90oto the other rotor. Re-check the
operation of the rotors.
4] Replace the o’ring (Item 2) into
groove in the meter cap, if the o’ring
has grown or is damaged in any way
replace it with a new part.
5] Replace the meter cap making sure
that the locating pin in the body
lines up with the hole in the meter
cap. Insert the cap head screws
(Item 7) and tighten in a diagonal
sequence 1, 3, 2, 4, etc.
6] The replacement of cables and
connectors are a reversal of the
disassembly procedure, replace
conduit fitting if required. When
replaceing the Standard LC Display
or the Deluxe LC Display, confirm
the orientation marks made on
disassembly are aligned then screw
the register into place.
7] Test the meter by turning the rotors
with a finger or by applying very low
air pressure (no more than a good
breath) to one end of the meter,
before returning the meter to the line.
Pulse Circuit Board (PCB) Notes:
The pulse PCB (Item 5) is fitted with (A)
two reed switches; (B) hall effect
sensors; or (C) one reed switch and one
hall effect sensor. The PCB board is
fastened to the meter cap (Item 4) by
two screws and stand off’s. All care and
caution should be taken when
removing or handling the PCB as both
the reed switch and hall effect sensor
are fragile.
Reed switch or hall effect sensors are
not available as individual replacement
parts and are only available with the
complete PCB (Item 5).
3
Service Instructions
5
Rotors must be at 90oto each other.
Rotor #2
Rotor #1

1A 1 MS524S Meter Body Module (Aluminium)
1A 1 MS524BRS Meter Body Module (Bronze)
1B 2 MS518S 2” BSP Flange (Aluminium)
1B 2 MS518NS 2” NPT Flange (Aluminium)
1B 2 MS518BRS 2” BSP Flange (Bronze)
1B 2 MS518NBRS 2” NPT Flange (Bronze)
1C 2 MS519S 2” ANSI - 150lb Flange (Aluminium)
1C 2 MS519DS 2” DIN-16 Flange (Aluminium)
1C 2 MS519JS 2” JIS-10K Flange (Aluminium)
1C 2 MS519BRS 2” ANSI - 150lb Flange (Bronze)
1C 2 MS519DBRS 2” DIN-16 Flange (Bronze)
1C 2 MS519JBRS 2” JIS-10K Flange (Bronze)
1D 2 uBS140S “O” Ring (NBR)
1D 2 uBS140ES “O” Ring (EPDM)
1D 2 uBS140TES “O” Ring (Teflon)
1D 2 uBS140VS “O” Ring (Viton)
1E 4 uMS367S Bolt set (To suit item 1B only)
1F 4 uMS116S Bolt set (To suit item 1C only)
21uBS252S “O” Ring (NBR)
21uBS252ES “O” Ring (EPDM)
21uBS252TES “O” Ring (Teflon)
21uBS252VS “O” Ring (Viton)
32uMS147S Rotors (PPS)
3 2 MS147-1S Rotors (Stainless Steel)
3 2 MS147TS Rotors High Temperature (PPS)
3 2 MS147HS Rotors High Viscosity (PPS)
3 2 MS147HTS Rotors High Temp/High Viscosity (PPS)
3 2 MS147-1HS Rotors High Viscosity (Stainless Steel)
4 1 MS230 Meter Cap (Aluminium)
4 1 MS230BR Meter Cap (Bronze)
51uMS201-RS PCB (Standard Reed Switch)
51uMS201-HES PCB (Hall Effect Sensor)
5 1 MS201-R/HES PCB ( 1 Reed Switch & 1 Hall Effect Sensor)
6 2 MS284S PCB Board Screws
78uMS243S Meter Cap Screws (Standard)
81uMS300S Pulser Cap Gasket
9 1 MS160 Pulser Cap (Aluminium) 20mm Conduit Thread
9 1 MS160N Pulser Cap (Aluminium) 1/2” NPT Thread
9 1 MS160BR Pulser Cap (Bronze) 20mm Conduit Thread
9 1 MS160BR-N Pulser Cap (Bronze) 1/2” NPT Thread
10 2 MS115S Pulser Cap Screw (Stainless Steel)
4
Meter Parts Listing
Item
No.
No.
Off. Part or Set Part Description
Key:
uIndicates recommended Spare Parts to stock
Rec.
Parts
1A
1A 2
1E
1B
1D
1F
1D
1C
7
6
5
4
3
10
9
8

5
MS280S Deluxe LCD Display (Complete)
14 1 MS279S Mounting Adaptor Plate
15 4 uMS117S Adaptor Screws
16 1 uMS69S LC Display Unit
17 4 uMS118S LC Display Mounting Screws
18 1 uMS127 Battery Retaining Screw
19 1 uMS126 Battery (Standard) CR2040
20 1 uMS68 Connector and Cable (Not Shown)
21 1 MS87 PTB Approval Label (Not Shown)
22 1 uMS128S Extended Life Battery 2/3 AA (Not Shown)
NOTE: Note Suitable for Intrinsic Use
33 1 uMS307S Gasket
MS576MS Standard LC Display (Complete)
22 1 MS572S Mounting Adaptor Plate
23 4 uMS115S Adaptor Screws
24 1 uMS570S LC Display Module
25 1 uMS493S 3.6 Volt Battery (Lithium) Size C
26 4 uMS129S Register Screws
Display Parts Listing
8222324 25 26
814 15 18 19
1716
33
Item
No.
No.
Off.
Part or Set
(Order from this column only) Part Description
Rec.
Parts
MS280S
Deluxe
LC Display
MS576MS
Standard
LC Display

* Unless High Viscosity or High Temperature rotors are fitted
** Conforms to Directive 97/23/EC - Cat 1.
*** With High Temperature Rotors fitted
6
Meter Specifications
Meter Type
Flow Ranges
Litres/minute - US Gall/min
Above 5 Centipoise
Below 5 Centipoise
Accuracy of Reading
Maximum Viscosity*
Max. Operating Pressure**
Max. Operating Temp.***
Pulse Type
Pulses Per Litre
Pulse
15 to 350/ 4 to 92
33 to 300/9 to 79
+/- 0.5%
1000 Centipoise
18BAR/260PSI/1800kPa
80°C/ 176°F - 120°C/ 248°F
Dual Reed Switches or Hall
effect sensor or combination
HE sensor/Reed switch.
6.68/13.3 or 25.28/50.34
Pulse with Standard
LC Display
15 to 350/ 4 to 92
33 to 300/9 to 79
+/- 0.5%
1000 Centipoise
18BAR/260PSI/1800kPa
80°C/ 176°F - 120°C/ 248°F
Dual Reed Switches or Hall
effect sensor or combination
HE sensor/Reed switch.
6.68/13.3 or 25.28/50.34
Pulse with Deluxe
LC Display
15 to 350/ 4 to 92
33 to 300/9 to 79
+/- 0.5%
1000 Centipoise
18BAR/260PSI/1800kPa
80°C/ 176°F - 120°C/ 248°F
Dual Reed Switches or Hall
effect sensor or combination
HE sensor/Reed switch.
6.68/13.3 or 25.28/50.34
Meter Trouble Shooting
TROUBLE
Fluid will not flow through meter
Reduced flow through the meter
Meter reading inaccurate
Meter not giving a pulse signal
LCD Register not working
CAUSE
a] Foreign matter blocking rotors
b] Line strainer blocked
c] Damaged rotors
d] Meter connections over tightened
e] Fluid is too viscous
a] Strainer is partially blocked
b] Fluid is too viscous
a] Fluid flow rate is too high or too low
b] Fluid is too viscous
c] Excess wear caused by incorrect
installation
a] Faulty hall effect sensor
b] Faulty reed switch
c] Magnets failed
a] Battery not connected properly
b] Battery flat
c] Faulty wiring connections
d] Faulty LC display
e] Faulty connection from LC display
REMEDY
a] Dismantle meter, clean rotors
(Strainer must be fitted in line)
b] Clean strainer
c] Replace rotors (Strainer must be
fitted in line)
d] Re-adjust connections
e] See specifications for maximum
viscosity
a] Clean strainer
b] See specifications for maximum
viscosity
a] See specifications for minimum and
maximum flow rates
b] Bleed air from system
c] Check meter body and rotors.
Replace as required. Refer to
installation instructions
a] Replace PCB Board
b] Replace PCB Board
c] Replace magnets
a] Check battery connections
b] Replace battery
c] Check wiring for loose or faulty
connections
d] Replace LC display
e] Check wiring connections

Meter Dimensions
178mm
264mm Flanged
198mm
18mm 55mm
137mm
M50 Pulse Meter Dimensions
M50 Pulse Meter with Standard or Deluxe LC Display
Macnaught Industries (‘Macnaught’)
warrants that the Products will be free
from any defects caused by faulty
material or workmanship for a period
of twelve (12) months from the date of
sale of the Products to the enduser (the
‘Warranty Period’) PROVIDED THAT,
during the Warranty Period:
1. Macnaught receives notice setting
out full details of any defect in any
product and details of the time and
place of purchase of the Product:
and
2. The enduser, at its own cost returns
the Product to the nearest autho-
rised Macnaught Service Centre.
Macnaught shall, as its option repair or
replace and Product found
defective by its inspection or refund the
price paid by the enduser for
that Product.
Macnaught's liability and the enduser’s
rights under this warranty shall be
limited to such repair, replacement or
refund and, in particular, shall not
extend to any direct, special, indirect
or consequential damage or losses of
any nature.
Note: This warranty does not form part
of, nor does it constitute, a contract
between Macnaught and the enduser. It
is additional to any warranty given by
the seller of the Products and does not
exclude, limit, restrict or modify the
rights and remedies conferred upon the
enduser, or the liabilities imposed on
the seller, by any statute or other laws
in respect of the sale of the Product.
MACNAUGHT PTY. LTD
ACN 000 075 785
41-49 Henderson Street, Turella Sydney NSW Australia 2205
PO Box 90 Arncliffe, Sydney NSW Australia 2205
Telephone [phone] Facsimile [phone]
Email [email protected] - Web Site www.macnaught.com.au
ISO 9001 Lic 8602
Standards Australia
210mm Screwed
152 ANSI 155 JIS 165DIN
223mm
Warranty
238mm
55mm
178mm
213mm
210mm Screwed
264mm Flanged
86mm
152 ANSI 155 JIS 165DIN