Assured Automation WM-NLD Series Installation, Operation & Maintenance Manual page 2

1. General Information:
WM-NLD lead-free water meters use the
internationally accepted nutating disc,
positive diaplacement principle. A gear
train drives the register totalizer dials and
register. This meter comes standard with
pulse output (see pulse output details).
2. Specifications:
Materials:
Body & flanges: Lead free brass
Internals: Engineered thermoplastic
Magnet: Alnico
Maximum Pressure: 150 PSIG
Maximum Temperature: 120˚F
+4 +4
Accuracy: 1.5%
+3 +3
+2 +2
Sensor: dry contact reed switch
+1 +1
0 0
-1 -1
Pulse Output Rate: 1 pulse per gallon
5/8"x1/2" 5/8"x1/2" 5/8"x1/2" 5/8"x1/2"
-2 -2
5/8"x3/4" 5/8"x3/4" 5/8"x3/4" 5/8"x3/4"
-3 -3
Maximum Current: 10mA
-4 -4
0 0 5 5 10 10 15 15 20 20 25 25
Flow Rate (US Gallons per minute) Flow Rate (US Gallons per minute)
Maximum Voltage: 24VAC/DC
+4
+4
Cable Length: 2 ft. (max. run up to 5000 ft.)
+3 +3
+2 +2
+1 +1
3. Installation:
0 0
-1 -1
1. Thoroughly flush the service line
-2 -2
-3 -3
upstream of the meter to remove
-4 -4
0 0 20 20 40 40 60 60
dirt and debris. We recommend install-
Flow Rate (US Gallons per minute) Flow Rate (US Gallons per minute)
ing a strainer upstream of the meter if
water quality is poor.
2. The meter can be installed in horizontal,
vertical or inclined position. Make sure
that the direction of flow follows the
arrow cast on the meter body.
3. Slowly open any upstream valves to
prevent damage to the meter.
4. Calibration:
New meters are factory tested to meet the
AWWA C-700 meter accuracy specification.
WM-NLD Series Positive Displacement Water Meters - Installation, Operation, & Maintenance
3/4" 3/4"
1" 1"
30 30 35 35 40 40 45 45 50 50 55 55
2" 2"
1 1/2" 1 1/2"
80 80 100 100 120 120 140 140 160 160
5. Accuracy Curves:
+4
+4
+3
+3
+2
+2
+1
+1
0
0
-1
-1
5/8"x1/2" 5/8"x1/2"
5/8"x1/2" 5/8"x1/2"
-2
-2
5/8"x3/4" 5/8"x3/4"
5/8"x3/4" 5/8"x3/4"
-3
-3
-4
-4
0 5 10 15 20
0 5 10 15 20
Flow Rate (US Gallons per minute)
Flow Rate (US Gallons per minute)
+4
+4
+3
+3
+2
+2
+1
+1
0
0
-1
-1
-2
-2
-3
-3
-4
-4
0 20 40 60
0 20 40 60
Flow Rate (US Gallons per minute)
Flow Rate (US Gallons per minute)
6. Head Loss Curves:
16 16
14 14
5/8"x1/2" 5/8"x1/2" 5/8"x1/2" 5/8"x1/2"
12 12
5/8"x3/4" 5/8"x3/4" 5/8"x3/4" 5/8"x3/4"
10 10
8 8
6 6
4 4
2 2
0 0
0 0 5 5 10 10 15 15 20 20
Flow Rate (US Gallons per minute) Flow Rate (US Gallons per minute)
16 16
14 14
12 12
10
10
8 8
6 6
4 4
2 2
0 0
0 0 20 20 40 40 60 60
Flow Rate (US Gallons per minute) Flow Rate (US Gallons per minute)
7. Pulse Output:
The pulse output is a simple dry contact
reed switch. To use the pulse output, the
2 wires from the cable must be hooked up
to the proper terminals of your PLC, HMI,
or simple pulse counter. Polarity does not
matter for these wires. If you are using the
Assured Automation KAL-DO6 pulse counter,
the terminals to use are #2 and #6.
8. Approvals and Certifications:
• Meets NSF 61 Annex G standards
• Conforms to AWWA-C700
3/4"
3/4" 1"
1"
25 30 35 40 45 50
25 30 35 40 45 50
2"
2"
1 1/2"
1 1/2"
80 100 120 140
80 100 120 140
3/4" 3/4"
1" 1"
25 25 30 30 35 35 40 40 45 45 50 50
80 80 100 100 120 120 140 140 160
55
55
160
160
55 55
160