Xylem MJK 713 User Manual

Manual

MJK 713
Open Channel Flowmeter

US 3.10 713 FLOW CONVERTER 1210 - SW 833062

1

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com

Manual

Declaration of Conformity

Konformitetserklæring

Vi, MJK Automation A/S,
DK-2850 Nærum, påtager os
det fulde ansvar for at produktet

Declaration of Conformity

We, MJK Automation A/S,
DK-2850 Nærum, declare under
our sole responsibility that the
product

Konformitätserklärung

Wir, MJK Automation A/S,
DK-2850 Nærum, erklären in
alleiniger Verantwortung, dass
das Produkt

MJK Expert Series 1400 / 3400 Pressure Level Transmitter

som denne erklæring angår,
er i overensstemmelse med
følgende standard(er) eller andre
normdokument(er).

EN60079.0:2006, EN60079.11:2007
EN61000-6-1:2007
EN61000-6-3:2007

efter bestemmelserne i
direktiv

2004/108/EC

Declaration de conformite

Nous, MJK Automation A/S,
DK-2850 Nærum, déclarons
sous notre seule responsabilité
que le produit

to which this declaration relates
is in conformity with the following
standard(s) or other normative
document(s).

EN60079.0:2006, EN60079.11:2007
EN61000-6-1:2007
EN61000-6-3:2007

following the provisions of
Directive

2004/108/EC

Dichiarazione di conformità

Noi, MJK Automation A/S,
DK-2850 Nærum, dichiariamo
sotto la nostra esclusiva respon­sabilità che l’apparecchio

auf das sich diese Erklärung
bezieht mit der/den folgenden
Nor me(en) oder normativen
Dokument(en) übereinstimmt.

EN60079.0:2006, EN60079.11:2007
EN61000-6-1:2007
EN61000-6-3:2007

Gemäss den Bestimmungen der
Richtlinie

2004/108/EC

Declaración de Conformidad

Nosotros, MJK Automation A/S,
DK-2850 Nærum, declaramos
bajo nuestra única responsabili­dad que el producto

MJK Expert Series 1400 / 3400 Pressure Level Transmitter

auquel se réfère cette déclara­tion est conforme á la (aux)
norme(s) ou autre(s) document(s)
normatif(s)

EN60079.0:2006, EN60079.11:2007
EN61000-6-1:2007
EN61000-6-3:2007

conformément aux dispositions
de Directive

2004/108/EC

al quale questa dichiarazione si
riferisce, è conforme alla seg­uente normativa(e) standard o ad
altri documenti di normativa(e)

EN60079.0:2006, EN60079.11:2007
EN61000-6-1:2007
EN61000-6-3:2007

conformemente alla disposizioni
della Direzione

2004/108/EC

06.07.2011

Jens Kruse

UL Approvals

UL-CUL listed, File # E 194021 UL 508/c22: 2 No. 142-M1987.

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2

al cual se refiere esta de­claración, está en conformidad
con la(s) siguente(e) norma(s) u
otros documentos normativos

EN60079.0:2006, EN60079.11:2007
EN61000-6-1:2007
EN61000-6-3:2007

según las disposiciones de la(s)
directiva(s)

2004/108/EC

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com

Manual

Contents

Introduction 5

Safety instructions 5

Repair 5
Hazardous areas 5

Product identification 6

Mounting 6

General 6
Explosion hazardous areas 6

Mechanical mounting 7

MJK 713 Flowmeter 7

®

Shuttle

Ultrasonic Sensor 7
Measuring distances for Parshall flumes 9
Measuring distances for Palmer & Bowlus flumes 9
Measuring distances for rectangular weirs 9
Measuring distances for V-notch weirs 9
Measuring along a wall or other plane 10
Flow measurement with smaller flumes / weirs 10
The spread of the ultrasonic signal 10
Measuring through a concrete deck 11
Measurement through a pipe for foam protection. 11
Model 3100 Hydrostatic Transmitter 12
Measuring distances for Parshall flumes 12
Measuring distances for Palmer & Bowlus flumes 12
Measuring distances for rectangular weirs 13
Measuring distances for V-notch weirs 13

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Electrical mounting 14

MJK 713 System Package 1 14
MJK 713 System Package 2 14
MJK 713 System Package 3 14

Cable extension 15

Ultrasonic sensor 15
Cutting the cable 15
Hydrostatic transmitter 16
Cutting the cable 16

Display and keyboard 17

Quick start 17

Initial startup 18

3

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com

Manual

Indications 19

Function keys 20

Flow key Q(t) 20
Totalizer key SQ(t) 20
Alarm key 21
Power loss alarm 21
Sample key 21
Menu key 22

System Configuration 23

1.0 Set basic parameters 23

1.1 Set date and time 23

1.2 Access code enabled/disabled 23

1.3 Enter new access code 23

1.4 Select unit measurement 23

1.5 Select unit volume 23

1.6 Select unit flow rate 23

2.0 Set sensor parameters 23

2.1.1 Distance from zero to bottom of sensor 23

2.1.2 Hydrostatic sensor range 23

2.2 Level averaging 23

3.0 Choose primary device 24

3.1 Parshall flumes 24

3.2 Palmer & Bowlus flumes 24

3.3 V-notch weir 24

3.4 Rectangular weir 24

3.4.1 With or without contraction 24

3.4.2 Rectangular weir crest width 24

3.5 Q(h) linearization 24

3.5.1 Number of Q(h) points 24

3.5.2 Select decimal point for the flow values 24

3.5.3 Linearization height value 24

3.5.4 Linearization flow value 24

3.6 Optional formula 24

3.6.1 Optional formula - enter exponent 24

3.6.2 Select decimal point for coefficient 24

3.6.3 Optional formula - enter coefficient 24

3.7 Flow range / level range 25

4.0 Set digital output parameters 25

4.1 Select digital outputs (1-5) 25

4.2 Select function for DO 25

4.3 Alarm flow rate low 25

4.4 Alarm flow rate high 25

4.5 Set volume between pulses 25

4.6 Digital output ON-time 25

4.7 Choose delay on signal 26

4.8 Digital output NC/NO 26

5.0 Analog output 0-20 / 4-20 mA 26

Menu chart 27

Indication menus 27
Configuration menus 27

Appendix 30

A Factory settings 30
B Trouble shooting 31
C Technical specifications 32
D Hardware adjustments 33
E System Package 2 ­ Shuttle

®

used as signal amplifier 34

F Max. head to max. nominal flow 37

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4

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com

Manual

Introduction

Thank you for choosing an MJK 713 Open Channel Flow­meter.

The MJK 713 Open Channel Flowmeter is a high quality
flow measurement instrument, in which the relation
between functions, userfriendliness and precision is
optimum.

The MJK 713 Open Channel Flowmeter use either an
ultrasonic transmitter or a hydrostatic pressure
transmitter. This must be specified at time of ordering.

The MJK 713 Open Channel Flowmeter measures the
flow rate of water or wastewater in all types of open weirs
and flumes and provides a display of both current flow
rate and totalized flow.

Yet MJK 713 is simple to set up and use in almost all ap­plications, we recommend that you read this manual thor­oughly in order to gain full use from the equipment.

You can always contact your representative or the MJK
Service Hotline for advice and guidance. Also, take a look
at www.mjk.com for additional product and application
information.

MJK Automation A/S is a Xylem brand.

Safety instructions

1: Read this manual carefully.
2: Be aware of the environment on the installation site.

Wear necessary protective equipment and follow all
current safety regulations.

3: MJK 713 can provide a start signal for dangerous

machinery. Always ensure that
connected machinery and other equipment are ef-
fectively being put out of service (i.e. removal of main
fuses, lock main and/or security switches in off posi­tion) before commencing installation, fault finding,
service and maintenance work etc.

4A: MJK 713 model 2500: There is a risk of lethal

electrical chock from terminal 1 to 5 and L-0.
Be careful not to touch these while the unit is in ser­vice.

4B: MJK 713 model 3000: There is a risk of lethal

electrical chock from terminal L-0. Be careful not to
touch these while the unit is in service.

Repair

1: Repair of Ex approved equipment (ultrasonic trans-

mitter) must only be made by MJK or by a service
representative approved by MJK.

Hazardous areas

1: All current local and national standards, regulations

regarding installation and use of Ex or hazardous
zone approved equipment, certifications and safety
instructions for Ex equipment, that have been used
together with the installation of the Shuttle

®

ultra-

sonic transmitter must be strictly observed.

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5

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com

Manual

Product identification
General

A standard MJK 713 is delivered for two different measur­ing ranges (0 - 1 ft and 0 - 3 ft).

It is very important that the measuring range is correct
for the flume in question in order to obtain maximum
measuring accuracy.

Check that the item(s) delivered corresponds to the or­dered item(s). The item number is printed on a label that
is sticked onto the packing. Shown below is the label for
a MJK 713 System Package 1 delivery including a MJK
713 flowmeter and a Shuttle

®

ultrasonic sensor:

Mounting
General

MJK 713 measures the flow in an open flume or weir
based on the level of the head in the flume. The method
of measurement are based on the following mathematical
function:

x

Flow Q = f(head

× constant)

where the exponent x and the constant depends on the
type of weir or flume.
The flow converter has 3 different linearization
systems depending on how the volume of water is mea­sured:

- preprogrammed formulas for different dimensions of
the most common flumes and weirs, Parshall flumes,
Palmer & Bowlus flumes, V-notch weirs, and rectan­gular weirs.

- for other flumes and weirs with a known calculation
formula the exponent and the factor of the calcula­tion formula can be set.

- for flumes where no calculation formula exists, a
number of known flow values can be entered,
on which a point linearization and curve extrapolation
is calculated.

➀
➁

➁

➃

➀ Item number
➁ Item description

An identical marking can

be found on the right
hand side of the level

transmitter cabinet:

➂

➂

➂ Serial number
➃ Software version

It is obvious that the flow calculation is highly dependant
on the accuracy of the level measurement. It is therefore
important to follow the mounting instructions carefully for
the Shuttle

®

Ultrasonic Sensor (MJK 713 System Pack­age 1 or 2) or MJK model 3100 Pressure Transmitter
(MJK 713 System Package 3).

Explosion hazardous areas

The Shuttle

®

ultrasonic sensor is Ex approved and can be
mounted in Zone 2 without the need of a
zener barrier. It is not approved for Class I Division I
zones.

The Flowmeter (= the electronic box with

display) must not be mounted in explosive

hazardous areas.

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6

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com

Manual

Mechanical mounting
MJK 713 Flowmeter

The MJK 713 Flowmeter is in NEMA 4X enclosure and
can be mounted outdoors directly on a wall or in a panel
using a panel mounting kit (order no. 200105). A sun
shield (order no. 200115) is recommended in very sunny
locations.

The MJK 713 Flowmeter must be

mounted vertically in order to observe the

NEMA4X standard.

Shuttle® Ultrasonic Sensor

The following are extremely important when
mounting the ultrasonic transmitter:
1: It should be mounted securely.
2: It should be mounted absolutely vertical.

Use a spirit level in TWO directions.

3: It should be mounted in the correct distance from

the bottom of the flume / weir.

Observe the blocking distance!

4: It should be mounted in the correct distance from

the inlet.

Mechanical dimensions for the MJK 713 Flowmeter.

The drawing below shows the drilling distances for
mounting the cabinet on a wall:

A full scale print of above drawing can be found at the
end of this manual.

1: The ultrasonic sensor is equipped with a nut for bracket

mounting. Note the recess on the nut - it must be fitted
safely in the bracket for firm fixing to the bracket:

2a: To ensure a reliable and precise level measurement it is

of vital importance that the ultrasonic sensor points down
absolutely vertical against the liquid surface.

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7

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com

Manual

3: The ultrasonic sensor should be installed so that

the bottom of the sensor is as close as possible to
the max. height of the head but not closer than the

blocking distance.

Measuring range: 0 - 1’ 0 - 3’

Blocking distance: )* 16” 16”
Min. measuring range: 4” 12”
Max. measuring range: 12” 36”

Max. sensor height

)* 14” for System Package 2.

(w. Shuttle

➁: 30" 54"

®

Level Transmitter as signal amplifier.)

Maximum sensor height ➁ = Blocking distance ➀

+ measuring range ➃

➀

➁

2b: We deliver two types of sensor brackets that can be used

in almost any installation. The bracket shown is a flume
mounting bracket (order no. 200230 / 200235).

➃

➂

➀ Blocking distance ➁ Sensor height
➂ Actual measurement ➃ Measuring range

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8

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com

Manual

4: Mount the sensor in the correct upstream distance

from the head in the flume / weir.
The distance depends on the dimension and type
of flume / weir.

Measuring distances for Parshall flumes

Throat width b: Distance L: Throat width b: Distance L:

1” 10” 36” 43”
2” 11” 48” 47”
3” 12” 60” 51”
6” 16” 72” 56”
9” 23” 84” 59”
12” 36” 96” 63”
18” 37.5” 120” 72”
24” 39” 144” 80”

Measuring distances for rectangular weirs

- with and without side contraction

Measuring distances for Palmer & Bowlus flumes

Diameter D: Distance L: Diameter D: Distance L:

4” 2” 18” 9”
6” 3” 21” 10.5”
8” 4” 24” 12”
10” 5” 27” 13.5”
12” 6” 30” 15”
15” 7”

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(L = D/2)

The distance L should be between 4 to 5 times the nomi­nal width b.

Measuring distances for V-notch weirs

The distance L should be between 3 to 4 times the
height h of the notch.

9

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com

Manual

Measuring along a wall or other plane

The values in table 1 assume the ultrasonic signal is sent
along a smooth surface like a wall or plane without any

projections, joints, butts etc.

If the surface is not smooth or has projections (i.e. joints
on prefab elements), the ultrasonic signal will be im­pedeaded too much, and for that reason

the values for minimum distance to wall in table 1 should
be increased with 50 - 100 % !

Flow measurement with smaller flumes / weirs

Smaller flumes may cause problems if the ultrasonic sig­nal reflects on the edges of the flume as shown below
(fig. 2a).
The edges should be cut off (fig. 2c) or the ultrasonic
sensor should be mounted in a pipe (fig. 2b) with smooth
inner surface.

The spread of the ultrasonic signal

The table and illustration below show the spread of the
ultrasonic signal in conjunction to the measuring distance:

Measuring Beam Minimum distance to
SMOOTH
distance: spread: wall (from center line):

1’ 5” 2.3”
2’ 5” 2.6”
3’ 6” 2.9”

Table 1: The ultrasonic signal spread along a smooth wall and minimum

distance to center line in conjunction to the measuring distance.

Accordingly, as the measuring distance increases, the
distance from the center line to a smooth wall should also
be increased.
To avoid false echoes from e.g. edges, a minimum dis­tance as shown on the drawing must be kept. The sensor
can be mounted in a smooth pipe if the distance cannot
be obtained. (See figure 1.)

(min. dia. 5 in)

A B C

Figure 2: Use a pipe (B) or cut off the edges (C) on small weirs to prevent

disturbing reflections from the flume edges.

Blocking

distance!

Figure 1: The signal spread in conjunction with the measurement distance. The

signal spread should be increased by 50 - 100 % if the surface is not
smooth!

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10

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com

Manual

Measuring through a concrete deck

When the ultrasonic sensor is measuring through a con­crete deck, the dimension of the opening should be made
as shown below: (See table 1 for the sensor spread.)

Min. diameter (D)

= sensor spread +

100 %

Measurement through a concrete deck with

Measurement through a concrete deck with

sharp edge.

Min. diameter (D) =

45 - 60 ° edge cutoff.

sensor spread

+ 50 %

Measurement through a pipe for foam protection.

When measuring on liquids prone to build up foam on the
surface, it can become necessary to measure through a
pipe, since the build up of foam rarely will occur inside the
pipe.

Measurement through a pipe for foam protection.

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Min. diameter (D)

= sensor spread +

100 %

11

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com

Manual

Model 3100 Hydrostatic Transmitter

The following directions should be followed when mount­ing the pressure transmitter:
1: It should be mounted securely - preferably on

a pipe.

1 in NPT thread

pressure transmitter from hurling around in a Parshall flume.

The use of a

stilling well is the

best option!

A 1 in pipe is used to prevent the

3: Mount the transmitter in the correct upstream

distance from the contraction in the flume / weir.
The distance depends on the dimension and type
of flume / weir.

4: Mount the transmitter at a location with no or very

little turbulence - preferably in a stilling well placed
in the correct distance from the contraction.

Measuring distances for Parshall flumes

Throat width b: Distance L: Throat width b: Distance L:

1” 10” 36” 43”
2” 11” 48” 47”
3” 12” 60” 51”
6” 16” 72” 56”
9” 23” 84” 59”
12” 36” 96” 63”
18” 37.5” 120” 72”
24” 39” 144” 80”

In case the water stream is so intense that the turbulence will affect the measuring
accuracy, the pressure transmitter must be placed in a stilling well. Note, that the

transmitter should be positioned in the stilling well at the same height as the

zero flow level!

2: It should be placed in the correct height over the

bottom of the flume / weir.

➁

➀

➀ Actual measurement

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➁ Measuring range

Measuring distances for Palmer & Bowlus flumes

A stilling well should always

be used together with a

pressure transmitter!

Diameter D: Distance L: Diameter D: Distance L:

4” 2” 18” 9”
6” 3” 21” 10.5”
8” 4” 24” 12”
10” 5” 27” 13.5”
12” 6” 30” 15”
15” 7”

12

(L = D/2)

MJK North America, Inc.

37 Sherwood Terrace, #126
Lake Bluff, Il 60044
Tel.: [phone]
Fax: [phone]
[e-mail]
www.mjk.com