No.SS1-MGB120-0200（9th ed.）Battery-powered electromagnetic water meter
Model MGB12A

Summary
The battery-powered electromagnetic water meter is the culmination of Azbil
Kimmon's water meter technology and Azbil's electromagnetic flow meter
technology.
This water meter is to be used for transaction and certification of drinking water,agricultural water, and industrial water as defined by the Measurement Law, andis based on JIS B8570-2 "Water meters and hot water meters Part 2: For
transaction or certification" under the 2005 ministerial ordinance revising thespecified measuring instrument inspection regulations.

Main Features◦ Battery-powered, no wiring required
Since this unit is battery-powered, there is no need for wiring work. Thesubmersible type can be used in places where it is submerged in water.
The battery can run for 9 years, which is longer than the 8-year validity period
stipulated by the Measurement Law.
◦ Wide metering range

Application

The metering range is R=200 (R=Q3/Q1, rated maximum flow rate: Q3 and rated◦ waterworks

minimum flow rate: Q1). The wide flow range enables measurement up to the◦ industrial water◦ agricultural water supply

large flow range, allowing the impeller type water meter currently in use to be
reduced in diameter by one step.
◦ High Durability and Low Pressure Loss
Based on the structure and principle of an electromagnetic flowmeter, this waterElectromagnetic water meter requirements

meter has no mechanical rotating parts and is highly durable without wear and◦ The internal structure, setting data, etc. cannot be easily tampered.

clogging caused by foreign matter. Since there are no obstructions to flow inside◦ Sealed structure.

the measuring pipe, there is almost no pressure loss.

◦Zero point adjustment and data modification are not allowed.

◦ Easy-to-read LCD display◦ The certification is valid for eight years.

The LCD display with backlight provides excellent visibility.

After 8 years, the water meter must be renewed.

The backlight turns off automatically in about 30 seconds, so battery life is not◦ Integrated flow rate display.

reduced by leaving the backlight on.

◦ Type approval numbers L101, L102, L1123◦ Inverted display
The internal display reverses to match the top cover of the main unit, making it
easy for the meter reader.
◦ Extensive history management functions
The history management function records non-full water conditions, occurrenceof backflow, number of times the backlight is turned on, etc., inside the device.
◦ This product is manufactured by Azbil Kyoto Corporation, a designatedmanufacturer of water meters (Category 1 and Category 2).
◦ Telegram output (compliant with Tokyo Metropolitan Bureau of Waterworks
communication specification V2.6A/2.7).

1

Display：

Main unit specifications
50A、65A、75A、100A、125A、150A、200A
Connection：
Wafer type
Material properties：
Outer box body： stainless steel
measuring tube： stainless steellining：epoxy
Resin electrode： Stainless Steel Electrodesealant：
fluoroelastomer
display part：
hard glass
Meter top cover： Polycarbonate resin
Body sealant：
ethylene-propylene rubber
Special Packing： ethylene-propylene rubber
Battery：lithium battery

Digital display with rotating backlight
The backlight illuminates for about 30 seconds when the top cover isopened.
When the top cover is closed again, the light comes on again.
(for a cumulative total of 1 minute/day).
To improve visibility, the display can be reversed to a direction that iseasier to read.
(The number of displayed digits varies depending on the caliber.

Caliber:

Indications：
Positive direction indicates Reverse direction representation
display items

Caliber（A）

65
75
100
125

Dimensions and weight：Described in outline drawing
Ambient temperature：5～55 [℃ ]Ambient humidity：0～100 [%RH]（At an ambient temperature of 40°C）

Fluid Conductivity： 50～1000 [μS/cm]
Fluid temperature：
0.1～30 [℃ ]Fluid pressure：0.03～1.0 [MPa]Max. working pressure：
1.0 [MPa]
Pressure loss：
0.063 [MPa] or less (at Q3 flow rate)

Error

5075

Error

0.8 or less

100

0.8 or less1.28 or less

0.504 or more 0.8 or more 0.8 or more 1.28 or more

±2%range 78.75 or less
Flow Rate
measure start

0.1575125 or less 125 or less
0.25

200 or less

0.25

0.4

[m3/h]
Caliber(A)1251502 or more
3.2 or lessError

1.25 or more

±5%Range

2 or lessError

2 or more±2%Range

312.5 or less

Flow Rate
measure start

0.625

200
3.15 or more

Integer part 7 digits (m3)

200+2 digits (L)character height

12 mm(6 mm）

6 mm

BlackBlack

Integer part 4 digits (m3/h)

100L/P

1m3/P

3.2 or more

5.04 or more

50

○

○

500 or less787.5 or less

65

○

○

75

○

○

100

○

○

125

○

○

150ー

○200ー

○

1

1.575

error

Q3

Q1：定格最小流量
Q1:Fixedminimum flow rate

+3 digits (L)Caliber（A）

Output pulse width；For 100L/P specification: 200 msec min.

500 msec or more for 1m3/P specification
Output communication cable; Vinyl Captive Tire Round Cord VCTF
(Number of threads; 4)Flow

Q2：転移流量（＝Q1×1.6）
Q2:Turningflow rate (Q1x1.6)+1 decimal place (m3/h)

The pulse rate is selected from the following table.

Q2≦Q＜Q4 ±2％

Q3：定格最大流量
Q3:Fixedmaximum flow rate

Integer part 3 digits

digits (m3)

5.04 or less

Q1≦Q＜Q2 ±5％Q4：限界流量(＝Q3 ×1.25)
Q4:Limit
flow rate (=Q3x1.25)

Integer part 6

Output pulse rate; Pulse rate is selected from the following table.

Flow rate range and error, shipping verification flow rate

Q1Q2±5％

Instantaneous flow rate
(Not tested)

Alerts indicate； ・Air detection alarm・Reverse flow alarm・Excessive Traffic Alert
・Water Leak Alarm・Low battery voltage alarm
Input：
Pulse output (open drain) and telegram
output (compliant with Tokyo
Metropolitan Bureau of Waterworks
communication specifications V2.6/2.7)
Allowable pulse output voltage: 2 V DC to 24 V DC or less
Allowable pulse output current; 10 mA max.
Internal resistance; approx. 100 Ω0.315 or more 0.5 or more 0.5 or more 0.8 or more

±5% range 0.504 or lessAccumulated flow

150

Display color[m3/h]65

Accumulated flow

Instantaneous flow rate

50Note：No guarantee if constant submersion for 8 years。

Caliber(A)Accumulated flow

lower Instantaneous flow rate

Structure/Protection class：Waterproof structure IP68（JIS C 0920)

Flow Rate Range：

upper

Q4

Record management function：
Our service personnel will communicate with this
instrument to check the following items.
・Empty detection alarm occurrence record
・Reverse flow alarm occurrence record
・Low battery voltage alarm occurrence record
・Number of times backlight is turned on
・Date and time of equipment failure
・Readout of totalized values in case ofequipment failure±2％

Shippingcase constant flow rate (3 points)
出荷時検定流量（３点）
The
factory-approved flow rates are the
工場出荷時の検定流量は以下の３点です。
following three points.

・Q1 と 1.1Q1 との間. Between Q1 and 1.1Q1・Q2 と 1.1Q2 との間. Between Q2 and 1.1Q2

・0.9Q3 と Q3 との間. Between 0.9Q3 and Q3

Note: Communication may not be possible due to equipment failure conditions.

2

Mounting posture

Precautions for use
General precautions

Mounting position on horizontal piping

Mounting position on vertical piping

Mounting position on horizontal piping

Mounting position on horizontal piping

For general precautions, refer to JIS B 8570-1 "Water meters and hot water meters.
For precautions regarding electromagnetic flow meters, refer to JIS B 7554
Electromagnetic flowmeters" for precautions regarding electromagnetic flowmeters.
Effects of external magnetic fields
Avoid installation near high current cables, motors, or transformers due toelectromagnetic induction interference.

Installation in piping subject to vibration
Do not install in areas subject to high vibration.
Checking the flow direction
The flow direction is specified for this unit. Please install the unit so that the flowdirection is as indicated by the arrow on the side of the unit.
Upstream and downstream straight pipe lengths
The flowmeter should be guided by a flow with uniform velocity distribution.
Horizontal piping with the display facing to the side isconditionally acceptable.
〈Condition〉

Inverted installation on horizontal
piping is prohibited

Necessary straight pipe length on the upstream side

・No residual air in the piping
・No air must be mixed with the water in the passage.
・No accumulation of foreign matter

Installation position

Enlarged tubes with a conical angle of 15° or more(within 15° is considered to be a straight pipe section)

90°Vent

water meter

May not fill withfluid

water meter

Air tends to accumulate.

10D or more

5D or higher

May not fill withfluid

Reduced pipe (considered as straight pipe section)water meter

teeGoodGoodwater meter

Pump
5D orhigher

Partition valve fully

5D or higher

water meter

Various valves

There is a risk of leaked liquid
getting on the transducer.

Ensuring full water supply
This water meter uses the principle of an electromagneticflowmeter.
Electromagnetic flowmeter cannot measure in pipes that arenot full of water or in fluids containing air bubbles. Therefore,
please install the meter in a location where air bubbles do notaccumulate.
Mixing of chemicals
If chlorine or other chemicals are mixed in near the primary sideof the unit, the two liquids will not mix completely, resulting inelectrochemical instability. For this reason, we recommend
mixing on the secondary side of the unit, if possible.

water meter

open

5D or higher

Various pumps

10D or morewater meter

Strainer

Water meterＰ
5D orhigher

10D or more

Contamination of solids

Slurry fluid with mixed solids is not recommended for use
under conditions where solids are mixed, because thesolids will settle at the bottom of the pipe and the flow rate
will not be uniform.

Necessary straight pipe length on the downstream side
Water meter

downstream

Touching of electrodes is prohibited
Do not touch the electrode directly with bare hands. The
surface of the electrode may become dirty, causing the zero
point to fluctuate and making empty detection impossible.

2D or higher

Fluid restrictions

The following fluids cannot be used.
▪Containing bubbles▪Containing solids▪Containing oil or other insulating adherends▪Containing magnetic materials such as iron powder▪Containing surfactants
3

Type table4Outline

Unit : mm

Drawingcommunication
cable outlet

Cover
Retaining ringTransducer Case

Nameplate

Caliber
Flow direction arrow

H1

HElectrodes

125D

Detector case
Accumulated flowrate (m3)Integrated flow unit

L

Communication status
Accumulated flowrate (L)
Leak
Reverse flow

Pilot
Voltage drop

Instantaneous flow rate unit
Instantaneousflow rate (m3/h)

Overflow

Nameplate content

Fixed maximum flow rate

Air flow
Model Approval
NumberNote: Instrument number will be left blank if not specified

Display Details

Caliber（A）

L（mm）

H（mm）

H1（mm）

d（mm）

D（mm）

Weight（kg）

50

120

242

78.5

65

140

262

88

45

96

3.0

60

115

3.8

75

160

275

94.5

70

128

4.5

100

180

302

110.5

83

150

6.3

125200

331

125.5

108

180

8.3

150

229

372

150.5

139

210

11.1

200

300

426

177

189

265

24.35