Macnaught MX06S, Instruction Manual

Page: 3 / 38

Page 3 of 38
IMPORTANT INFORMATION
OPERATING PRINCIPLE
INSTALLATION PROCEDURE
FLUID COMPATABILITY
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
mesh strainer be installed as close as
possible to the inlet side of the meter.
When a strainer is installed it should be
regularly inspected and cleaned. Failure to
keep the strainer clean will dramatically effect
flow meter performance.
Contact your local representative for advice.
To prevent damage caused by air purge slowly
fill the meter with fluid.
To reduce pressure build-up turn off the
at the end of each day.
The reed switch can cause inaccurate rate
counts when used with high speed counters.
It is advised that a low speed counter is used or
alternatively a debounce circuit be installed.
AIR PURGE / LINE PRESSURE
STRAINER
Fluid passing through the meter causes the rotors to
turn, as shown below.
One of the rotors (the active rotor) is fitted with
magnets.
The passing of the magnets are picked up by the
sensing elements (Reed and Hall Effect sensors)
located in the Pulser Circuit Board.
The excitation of these switches provides a ‘Raw
Pulse Output’ which relates to the K-Factor.
(e.g. KF 36 = 36 pulses per litre of fluid passed)
This Pulse Output Signal can either be fed directly to
an external receiving element (e.g. Data Logger or
PLC) or alternatively to an LC Display which condi-
tions the Pulse input signal to display volume of fluid
passed. (e.g. Display 1 Litre per for every 36 pulses
1. It is recommended that when setting up pipe work
for meter installations, a bypass line be included
in the design. This provides the facility for a meter
to be removed for maintenance without interrupt
ing production. (see figure above)
2. Use a thread sealant on all pipe threads.
Caution: Thread tape must not enter flowmeter,
stopping flow meters operation.
3. For pump applications ensure pipe work and
Meter have the appropriate working pressure
rating to match the pressure output of the pump.
Refer to Meter Specifications section for further
details.
4. Install a wire mesh strainer, Y or basket type
as close as possible to the inlet side of the meter.
Meter 1/4”
74 micron / 200 mesh
Meter 1/2”- 2” 250 micron / 60 mesh
Meter 3”- 4”
400 micron / 40 mesh
5. Note: The Flowmeter can accept flow in any
direction.
6. The meter can be installed in any orientation as
long as the meter shafts are in a horizontal plane.
(Refer to diagram below for correct installation)
.
Note: Incorrect installation can cause premature
wear of meter components.
The orientation of the LC display can be changed
by loosening the 4 mounting screws.
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 is noted to be
decreasing.
REED SWITCH