WATER METERS
‘M’ SERIES
WATER METERS
INSTALLATION, OPERATION
AND MAINTENANCE GUIDE
METAL ‘M’ SERIES
WATER METER
PLASTIC ‘M’ SERIES
WATER METER
PERFORMANCE DATA
DIMENSIONS AND WEIGHT
SPECIFICATIONS
PERFORMANCE DATA
DIMENSIONS AND WEIGHT
INTRODUCTION
SPECIFICATIONS
‘M’ SERIES WATER METERS
INDUSTRY’S SMALLEST WATER METERS
Netafim USA’s ‘M’ Series Water Meters are used as sub-meters for residential or commercial
applications and the industry’s smallest multi-jet water meter. The multi-jet principle assures an
equally distributed load on the impeller minimizing wear and maintaining accuracy. These meters
offer the best cost and performance, long-life flow measurement instruments. Wide clearances in
the measuring chamber and negligible area of contact between static and moving parts are the
main reasons for the high reliability of this design even in hard water.
FEATURES:
Only one moving part - the impeller - in
contact with the water for minimum wear
and utmost reliability
Magnetically driven sealed registers with
stainless steel/composite encapsulated
and guaranteed against fogging due to
moisture
Very accurate over a wide range of
flows for flexible and efficient water
management
Sealed
Register
Impeller
Measuring
Chamber
Pulse Reed
Switch
TamperProof Tab
Inlet Side
Basket Filter
AVAILABLE SIZES
MAXIMUM WORKING PRESSURE
MAXIMUM LIQUID TEMPERATURE
BODY MATERIAL - METAL
BODY MATERIAL - PLASTIC
CONNECTIONS
LENGTHSIZE/BODY WIDTH HEIGHT WEIGHT
3/4” PLASTIC
3/4” METAL
1” PLASTIC
1” METAL
SIZE
3/4”
1”
11 1/4”
11 1/4”
14 3/4“
14 3/4”
LOWEST FLOW
WITHIN ± 5%
ACCURACY
0.2 GPM
0.3 GPM
3/4” AND 1”
140 PSI
UP TO 122° F
CORROSION-PROOF COPPER ALLOY
COMPOSITE
MALE PIPE THREAD
3 3/4“
3 3/4”
4 1/4“
4 1/4”
LOWEST FLOW
4 1/4”
4 1/4”
4 1/4“
4 1/4”
WITHIN ± 2%
ACCURACY
0.9 GPM
1.2 GPM
1.3 lbs.
5.0 lbs.
2.4 lbs.
7.2 lbs.
NOMINAL FLOW
WITHIN ± 2%
ACCURACY
11 GPM
15.4 GPM
MAXIMUM FLOW
WITHIN ± 2%
ACCURACY
14 GPM
20 GPM
‘M’ SERIES WATER METERS • 3
REGISTER SPECIFICATIONS
REED SWITCH REGISTER
RECOMMENDED RESISTOR VALUES
The Reed Switch Register is a dry contact or simple switch
closure for communicating with control and monitoring
equipment. Registers are interchangeable and easily
replaced with common tools. They are removable even when
the meter is operating. A leak indicator in the center of the
dial registers the lowest flow through the meter. Flows are
totalled in U.S. Gallons and each dial face indicates the
multiplication factor.
Magnetic coupling activates the reed switch
creating a pulsed output.
Dry contact uses very little electric power.
Calculates volume related functions such as
data recorders or simple counters.
Maximum contact current is 50mA and
maximum contact voltage is 48VDC.
Red Wire = Positive
Black Wire = Negative
Black Wire
PHOTO DIODE REGISTER
The Photo Diode Register has a photo coupler
sensor that provides pulse output for communicating
with control and monitoring equipment. Registers are
interchangeable and easily replaced with common tools.
They are removable even when the meter is operating.
Flows are totalled in U.S. Gallons and each dial face
indicates the multiplication factor.
A sensor combines an IR light source and a light
sensitive diode in one package. Signals are created
when the light beam created by the IR light is
interrupted by a rotating element.
Requires a constant supply of DC power.
Minimum contact current is 15mA to a maximum of 25mA
DC through a resistor and maximum voltage is 28VDC.
Yellow Wire = Positive (20-30mA through a resistor)
Transparent Wire = Output (open collector, max. load 2mA)
Bare Wire = Ground
RESISTOR VALUE - Ω
RESISTOR VALUE - W
VOLTAGE › 5
0.25
180
6
220
0.25
9 12 24
330
470
0.25
0.5
1,000
1.0
REGISTERS READING A REGISTER
Reed
Switch
Only
Red Wire
NOTE: Always refer to the controller
manufacturer’s instructions for proper
installation and connection requirements.
TRANSPARENT : OUTPUT (npn) - MAX 2mA-25V
SHIELD: GROUND MAX. VOLTAGE : 25 VDC
5 YELLOW-MIN 15mA - MAX 25mA DC
Transparent
Wire
Yellow
Note: Correct polarity
of the leads should be
checked carefully to
prevent damage of the
sensor. Register will not
function properly if the
register lid is not closed
during operation.
Wire
TRANSPARENT : OUTPUT (npn) - MAX 2mA-25V
SHIELD: GROUND MAX. VOLTAGE : 25 VDC
5 YELLOW-MIN 15mA - MAX 25mA DC
Bare
Wire
4 • ‘M’ SERIES WATER METERS
READING A REGISTER
REGISTER SPECIFICATIONS
The Total Flow for a Water Meter register is calculated by adding the readings from the Totalizer
and the three fractional dials. The three fractional dials measure quantities smaller than the
totalizer reading and are continuously turning while calculating the flow.
TOTALIZER READING: Rotates sequentially for
each 100 U.S.G. (U.S. Gallons) calculated
Number displayed is multiplied by 100 to reach
Totalizer
Reading
total U.S.G.
FRACTIONAL DIAL # 1: Each number (1-9) on
the dial is multiplied by 10 to reach U.S.G.
One complete revolution of this dial = 10 U.S.G.
FRACTIONAL DIAL # 2: Each number (1-9) on
the dial is multiplied by 1 to reach U.S.G.
One complete revolution of this dial = 1 U.S.G.
FRACTIONAL DIAL # 3: Each number (1-9) on
the dial is multiplied by 0.1 to reach U.S.G.
Fractional
Dial #3
Fractional
Dial #1
Fractional
Dial #2
One complete revolution of this dial = 0.1 U.S.G.
CALCULATING THE TOTAL FLOW FOR
THIS REGISTER
Totalizer Reading: 0 0 x 100 = 0
Fractional Dial # 1: 7 7 x 10 = 70
Fractional Dial # 2: 5 5 x 1 = 5
Fractional Dial # 3: 7 7 x 0.1 = .7
CALCULATION:
Add Totalizer Reading and all Fractional Dial
Readings
0 + 70 + 5 + .7 = 75.7 U.S.G.
75.7 U.S. Gallons is the Current Total Flow
NOTE: If a number is partially visible on the totalizer,
always default to the lower of the 2 numbers when
calculating flow. If a fractional dial is pointing between
numbers, always default to the lower of the 2 numbers.
Fractional
Dial #3
Totalizer
Reading
Fractional
Dial #1
Fractional
Dial #2
REGISTER TOTALIZER
METER SIZE
VOLUME UNIT
PULSE OUTPUT (GALLONS/PULSE)
POINTER RESOLUTION - POINTER 1
POINTER RESOLUTION - POINTER 2
POINTER RESOLUTION - POINTER 3
GALLON
3/4” AND 1“
GALLON X 10
0.1
x 0.01 GALLON
x 0.1 GALLON
x 1.0 GALLON
GALLON
3/4” AND 1“
GALLON X 100
1.0
x 0.10 GALLON
x 1.0 GALLON
x 10 GALLON
‘M’ SERIES WATER METERS • 5
INSTALLATION MAINTENANCE
↑
WARRANTY
INSTALLATION REQUIREMENTS
1. Correct direction of flow is indicated on the water meter body (see Figure 1).
2. Dial face must be horizontal and facing upwards (see Figure 2).
3. Register lid must be in the closed position during normal operation (see Figure 3).
4. There are no straight pipe installation requirements. If possible 5” of straight pipe upstream
(before the meter) and 2” of straight pipe downstream (after the meter) is recommended to
achieve the best performance and accuracy.
5. Prior to water meter installation, the pipeline should be thoroughly flushed.
6. The water meter must be installed so that the pipe will be full of water at all times during metering.
7. Installation of a Continuous Acting Air Vent before the water meter is highly recommended to
eliminate air and ensure accurate flow readings (see Figure 4). For additional details on air vent
options and installation requirements, refer to the Netafim USA Landscape & Turf Catalog.
FIGURE 1
Direction of flow
indicated on body
Water Meter
Continuous
Acting Air Vent
FIGURE 3
Register lid closed
FIGURE 2
Dial face upwards
Water Flow
FIGURE 4
Air vent installation
REGISTER REMOVAL AND INSTALLATION
1. Pry the tamper-proof tab upward using a screwdriver.
2. Loosen and unscrew the brass or plastic closing ring and cap assembly that secures the register.
Lift off the closing ring and cap assembly. Lift out the register from it’s sealed compartment making
note of the position for any spacers and o-rings.
3. To install, place the register into the sealed compartment (including spacers and o-rings) and
place the closing ring and cap assembly on top of the register. Tighten the closing ring by twisting
until secure.
6 • ‘M’ SERIES WATER METERS
MAINTENANCE REQUIREMENTS
WARRANTY
1. Inlet side basket filter should be removed and cleaned every 90 days or as needed based on
the water quality at the site (see Figure 5).
2. Inlet side basket filter must remain in place during normal operation in order to avoid debris
entering and clogging the metering chamber.
3. Teflon tape should be used on pipe fittings and connections as needed to prevent leaks.
WARNING:
Units must not be subjected to system ‘blow out’ using compressed air. Subjecting the water
meter to this procedure will result in product failure and the resulting damage is not covered under
warranty. It is recommended that the water meter be installed in systems or portions of systems
that will gravity drain for winterization only.
If the unit is installed in a system which will be winterized with compressed air, please do one of
the following:
Install manual ball valves on each side of the water meter to isolate the water meter
from the system blow out procedure. Close the manual ball valve on one side of the
water meter, perform the blow out procedure and then open the manual ball valve.
Repeat process on the other side.
Remove the water meter before the blow out procedure and replace it with a section of
PVC/Polyethylene tubing. When the blow out procedure is complete, reinstall the water
meter.
FIGURE 5
Cleaning Inlet Side
Basket Filter
‘M’ SERIES WATER METER WARRANTY
Netafim ‘M’ Series Water Meters are individually tested, calibrated and inspected to ensure they
meet the highest quality standards and the testing documents are included with each meter. They
also have the industry’s longest warranty.
METERING COMPONENTS
(REGISTER & METERING ASSEMBLY)
METER BODY
3 YEARS
5 YEARS
‘M’ SERIES WATER METERS • 7
Inlet Side
Basket Filter
NETAFIM USA
5470 E. Home Ave.
Fresno, CA 93727
CS 888 638 2346
F 800 695 4753
www.netafimusa.com
82000-013370 04/12
Loading...