Xylem MJK 713 User manual

1
Manual
US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
Blokken 9
DK-3460 Birkerød
Denmark
Tel [phone]
www.mjk.com
MJK 713
Open Channel Flowmeter

2
Manual
US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
Blokken 9
DK-3460 Birkerød
Denmark
Tel [phone]
www.mjk.com
UL Approvals
UL-CUL listed, File # E 194021 UL 508/c22: 2 No. 142-M1987.
Declaration of Conformity
Jens Kruse
06.07.2011
MJK Expert Series 1400 / 3400 Pressure Level Transmitter
MJK Expert Series 1400 / 3400 Pressure Level Transmitter
Konformitetserklæring
Vi, MJK Automation A/S,
DK-3460 Birkerød, påtager os
det fulde ansvar for at produktet
Declaration of Conformity
We, MJK Automation A/S,
DK-3460 Birkerød, declare
under our sole responsibility
that the product
Konformitätserklärung
Wir, MJK Automation A/S,
DK-3460 Birkerød, erklären in
alleiniger Verantwortung,
dass das Produkt
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-3460 Birkerød, déclarons
sous notre seule responsabilité
que le produit
auquel se réfère cette déclara-
tion 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
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-3460 Birkerød, dichiariamo
sotto la nostra esclusiva respon-
sabilità che l’apparecchio
al quale questa dichiarazione si
riferisce, è conforme alla seg-
uente 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
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-3460 Birkerød, declaramos
bajo nuestra única responsabili-
dad que el producto
al cual se refiere esta de-
claración, 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
DK: [phone]
NO: [phone]
SE: [phone]
NL: [phone]
USA: [phone]
AUS: [phone]
MJK Automation A/S

3
Manual
US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
Blokken 9
DK-3460 Birkerød
Denmark
Tel [phone]
www.mjk.com
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
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

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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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US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
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DK-3460 Birkerød
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Introduction
Thank you for choosing an MJK 713 Open Channel Flow-
meter.
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 ap-
plications, we recommend that you read this manual thor-
oughly 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 posi-
tion) 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 ser-
vice.
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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US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
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DK-3460 Birkerød
Denmark
Tel [phone]
www.mjk.com
Product identification
General
A standard MJK 713 is delivered for two different measur-
ing 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 or-
dered 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:
An identical marking can
be found on the right
hand side of the level
transmitter cabinet:
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:
Flow Q = f(head x× constant)
where the exponent xand 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 mea-
sured:
- preprogrammed formulas for different dimensions of
the most common flumes and weirs, Parshall flumes,
Palmer & Bowlus flumes, V-notch weirs, and rectan-
gular weirs.
- for other flumes and weirs with a known calculation
formula the exponent and the factor of the calcula-
tion 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.
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 Pack-
age 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.
➀
➁
➃
➂
➂
➁
➀ Item number
➁ Item description
➂ Serial number
➃ Software version

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Manual
US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
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DK-3460 Birkerød
Denmark
Tel [phone]
www.mjk.com
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.
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.
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.
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:
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.

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Manual
US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
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DK-3460 Birkerød
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Tel [phone]
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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).
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 ➁: 30" 54"
)* 14” for System Package 2.
(w. Shuttle®Level Transmitter as signal amplifier.)
Maximum sensor height ➁ = Blocking distance ➀
+ measuring range ➃
➀ Blocking distance ➁ Sensor height
➂ Actual measurement ➃ Measuring range
➀
➁
➂
➃

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US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
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DK-3460 Birkerød
Denmark
Tel [phone]
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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”
Measuring distances for rectangular weirs
- with and without side contraction
The distance L should be between 4 to 5 times the nomi-
nal width b.
Measuring distances for V-notch weirs
The distance L should be between 3 to 4 times the
height h of the notch.
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”
(L = D/2)

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US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
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DK-3460 Birkerød
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Tel [phone]
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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 dis-
tance 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.)
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!
Flow measurement with smaller flumes / weirs
Smaller flumes may cause problems if the ultrasonic sig-
nal 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.
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 im-
pedeaded too much, and for that reason
the values for minimum distance to wall in table 1 should
be increased with 50 - 100 % !
(min. dia. 5 in)
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!
A B C

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US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
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Measurement through a concrete deck with
45 - 60 ° edge cutoff.
Min. diameter (D) =
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.
Measuring through a concrete deck
When the ultrasonic sensor is measuring through a con-
crete 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
sharp edge.
Min. diameter (D)
= sensor spread +
100 %

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US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
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DK-3460 Birkerød
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Model 3100 Hydrostatic Transmitter
The following directions should be followed when mount-
ing the pressure transmitter:
1: It should be mounted securely - preferably on
a pipe.
A 1 in pipe is used to prevent the
pressure transmitter from hurling around in a Parshall flume.
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.
1 in NPT thread
➀ Actual measurement ➁ Measuring range
➁
➀
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”
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”
(L = D/2)
A stilling well should always
be used together with a
pressure transmitter!
The use of a
stilling well is the
best option!

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US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
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Measuring distances for rectangular weirs
- with and without side contraction
The distance L should be between 4 to 5 times the nomi-
nal width b.
Measuring distances for V-notch weirs
The distance L should be between 3 to 4 times the
height h of the notch.

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DK-3460 Birkerød
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Tel [phone]
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Electrical mounting
MJK 713 must not be connected to the power supply
before the ultrasonic sensor / pressure transmitter is
mounted and connected correctly.
MJK 713 is supplied from the mains on terminal
“0” and “P”.
Current regulations for conductor and fuse dimensions
should always be observed. Remove the lid to gain access to the terminals.
Relay out 1 Relay out 2 Relay out 3 Relay out 4
Power
supply
Current output (0 / 4 - 20 mA) Totalizer output
Standard cable length 40 ft.
(Can be extended to max.150 ft. using
MJK no. 690010 cable.
No. 1 = brown
No. 2 = red
No. 3 = orange
No. 4 = yellow
No. 5 = black
MJK 713 2500 Flowmeter
Ultrasonic Sensor
MJK 713 System Package 1
MJK 713 2500 with ultrasonic sensor
MJK 713 System Package 3
MJK 713 3000 with hydrostatic level transmitter
Note: 1: Conduit hubs are to beconnected to the
conduit prior to the connection to the enclosure.
2: Terminal tightening torque = 0.5 Nm.
By looping the 4-20 mA signal through one of the relay
outputs on the Shuttle®Level Transmitter, a system
failure on the Shuttle®Level Transmitter will trig a
system failure message on the MJK 713. Note that
the Shuttle®must be programmed as described in
appendix E in order to achieve this function.
Ultrasonic Sensor
MJK 713 3000 Flowmeter
Shuttle®Level Transmitter
Power
supply
MJK 713 System Package 2
MJK 713 3000 with ultrasonic sensor using Shuttle®Level Transmitter as signal amplifier
Power
supply
No. 1 = red
No. 2 = brown
No. 3 = black
Pressure Transmitter

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Cable extension
One of the most common faults on a MJK 713
installation is bad or faulty cable connections.
It is recommended to use a MJK connection box if the
sensor cable must be extended.
Ultrasonic sensor
The Shuttle®ultrasonic sensor are standard de-livered
with 40 ft of cable. The ultrasonic sensor can be deliv-
ered with up to 150 ft of cable on order, or the standard
40 ft cable can be extended to max. 150 ft.
The cable is a special low capacity cable,
so extensions should always be made with
the same type of cable.
The ultrasonic sensor cable has 5 wires with both color
code and number:
Number: Color: Designation:
1 Brown Ultrasonic pulse
2 Red
3 Orange Temperature compensation
4 Yellow
5 Black Shield )*
)* This wire is connected to the cable shield.
The wires are mounted according to the terminal mark-
ings on the connection box PCB and on the MJK 713
respectively.
Cutting the cable
The cable is delivered with the wires stripped as shown
with the black wire (no. 5) soldered to the shield:
When the cable is cut, only 4 wires will appear:
When the cable has been cut, the shield
should be mounted in terminal 5 instead of
the black wire !
When the ultrasonic sensor is mounted and connected
correctly, the MJK 713 can be connected to the power
supply.
See section ‘Quick start’ on page 18.
To Shuttle®
ultrasonic
sensor
To MJK 713
flow meter
Max.
150 ft !
MJK Connection
Box (NEMA 4X),
order no. 200590.

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US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
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DK-3460 Birkerød
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Hydrostatic transmitter
The pressure transmitter are delivered with 40 ft of cable
as standard.
The cable can be lengthened with any type of cable using
MJK connection box 202922. Although the measuring
signal is not sensitive to electrical noise, we recommend
the use of a screened cable.
Ensure that no moisture can enter the pressure
compensation tube inside the cable.
The factory delivered cable has three wires marked with
the numbers 1 - 2 - 3.
Number: Color: Designation:
1 Black Positive (+) wire
2 Black Negative (-) wire
3 Black Shield )*
4 - Air pressure compensation tube
)* This wire is connected to the cable shield.
The wires are mounted according to the terminal mark-
ings on the connection box PCB and on the MJK 713
respectively.
Take care not to block or squeeze the air pressure
compensation tube ➃.
Cutting the cable
The cable is delivered with the wires stripped as shown
with wire no. 3 soldered to the shield:
➁
➀➃➂
When the cable is cut, 7 wires will appear:
When the cable has been cut, the shield
should be mounted in terminal 3 instead of
the black wire !
The small-gauged colored wires MUST NOT be used or
short circuited as it may damage the pressure transmitter.
The colored wires should be cut off in different lengths
to prevent them from short circuit.
See also separate instruction manual for the MJK pres-
sure transmitter.
When the pressure transmitter is mounted and connected
correctly, the MJK 713 can be connected to the power
supply.
See section ‘Quick start’ on page 18.
To MJK 713
flow meter
To pressure
transmitter
Max. loop resistance
600 Ω!
MJK Connection
Box (NEMA 4X)
with vent plug,
order no 202922.
➂

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US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
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DK-3460 Birkerød
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Tel [phone]
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Display and keyboard
ENTER
This key allows you to
change between the main
menu to a sub-menu, as
well as between sub-
menus.
The key also allows you
to confirm the choice
from a sub-menu.
ALARM
Alarm record with the pre-
vious nine alarms incl. date
and time of occurrence.
Q(t)
Registers for flow rate:
- instantaneous value
- average flow rate for
the last 1 hour
- average flow rate today
- average flow rate for
the last 24 hours
Display
2 x 24 character back-
lit display for indication
of menus and values.
ESCape
This key allows you to change back to the main
menu or to undo a new choice. By pressing
the ESCape button two or three times, you will
return to the function indications. If you think
you are lost, or you think you made a mistake,
simply press this button a few times to start over.
However, the escape function is disabled when
choosing primary device.
MENU
By pressing the MENU key,
the display will change to
the next main menu.
Arrow keys
The arrow keys are used
for changing a current
setting.
Pressing the arrow keys
change the values up
or down. By pressing
the ”up” arrow keys, the
number in the display will
increase.
Pressing the ”down”
arrow keys will decrease
the value.
SAMPLE
Registration of:
- total number of samples
- number of samples today
- number of samples within the
last 24 hours
ΣQ(t)
Registers for:
- total flow
- total flow 1 hour
- total flow today
- total flow 24 hours
- 99 days log
Quick start
When MJK 713 is powered up for the first time, a quick
setup sequence will be initiated that will guide you
through the following basic settings needed for most
installations:
1: selection of primary device / flow calculation
formula
2: max. flow range
3a: ultrasonic transmitter distance
(applies to MJK 713 2500 /
System Package 1 only)
3b: hydrostatic sensor range
(applies to MJK 713 3000 /
System Package 2 & 3 only)
After these initial settings has been made, MJK 713 will
automatically begin to measure flow. If you wish to take
advantage of the flow converter’s many other advanced
functions, such as flow proportion sampling, the remain-
ing sections of this manual will help you to configure the
unit.

18
Manual
US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
Blokken 9
DK-3460 Birkerød
Denmark
Tel [phone]
www.mjk.com
The max. flow range determines the range of the mA out-
put. MJK 713 will calculate the max. level based on the
desired max. flow for the selected primary device, and
set the analog output to give out 20 mA at the max. flow.
(The setting is also used internally to monitor the func-
tions of the flow meter.)
This menu will appear for a MJK 713 2500 /
System Package 1:
3a:
Set the distance from the zero point (= zero flow level in
flume/weir) to the bottom of the ultrasonic sensor with the
arrow keys and confirm with ENTER.
This menu will appear for a MJK 713 3000 /
System Package 2 & 3:
3b:
Set the measuring range for the hydrostatic pressure
transmitter with the arrow keys and confirm with ENTER.
The basic data entries is now finished and MJK 713 starts
to measure the flow.
To take advantage of MJK 713’s many advanced func-
tions, please see the system configuration section start-
ing on page 23.
Note: For System Package 2 (MJK 713 3000 with
Shuttle®Level Transmitter as signal amplifier:
See appendix E for the necessary settings for
the Shuttle®Level Transmitter
Note: “Quick Start” sequence can be initiated again
by holding ALARM + SAMPLE simultaneously
and pressing ENTER while in level readout
menu.
Initial startup
MJK 713 will show the following display at power-up:
MJK 713 initiates the quick setup sequence after app. 30
sec:
The following menus is only shown the first time MJK 713
is powered up and will not appear again after the initial
quick setup sequence unless the quick start sequence is
initiated again by holding ALARM + SAMPLE simultane-
ously and pressing
ENTER while in level readout menu.
This is shown when ENTER is pressed the first time.
1:
Select flume/weir or flow calculation formula with arrow
keys and confirm with ENTER. Choose between Parshall
flume, Palmer & Bowlus flume, V-notch weir, rectangular
weir or optional formula.
Depending on the selection of flume/weir type or calcula-
tion method, a number of menus for setting some specific
information may appear.
No matter which primary device being selected, the fol-
lowing will be displayed as the last:
2:
In this menu the maximum flow for the selected primary
device should be set in accordance with the value stated
in the tables in Appendix E.
It is very important to set the correct maximum
flow value, since it will dramatically reduce
measuring errors!
Set the desired max. flow range for the installation with
the arrow keys and confirm with ENTER.
MJK 713 will now calculate the max. level related to the
selected primary device and display the result in in the
second line.
Distance from zero
point to bottom of
sensor

19
Manual
US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
Blokken 9
DK-3460 Birkerød
Denmark
Tel [phone]
www.mjk.com
Indications
At the front of the flow converter, there are 4 function
keys: the flow rate key Q(t), the totalizer key ΣQ(t), the
alarm key ALARM and the sample key SAMPLE.
When one of these keys is pressed one or more times,
the different function menus appear. The menus available
depend on how you configure the flow converter.
Configuring the flow converter is accomplished in the
configuration menus, which in turn are divided into sev-
eral sub-menus. You gain access to the configuration
menus by pressing the MENU key. In each menu the dif-
ferent settings are obtained by pressing the arrow keys.
Note: A complete diagram of the menus can be
found in the back of this manual. This diagram
will be very helpful to you if you choose to
configure the flow converter!
Flow Key.
See also page 20.
Totalizer Key.
See also page 20.
Sample Key.
See also page 21.
Alarm Key.
See also page 21.
Last 9 alarm log.
99 x 24
hours log

20
Manual
US 3.10 713 FLOW CONVERTER 1905 - SW 833062 MJK Automation
Blokken 9
DK-3460 Birkerød
Denmark
Tel [phone]
www.mjk.com
Function keys
Flow key Q(t)
This key shows the values of the relevant flow, as well as
various average values.
F1 Flow
Press once for:
Here the instantaneous actual flow is shown. The flow is
calculated from the chosen Q(h)-formula. Measuring value
with time and date is indicated.
F2 Average flow 1 HR
Press twice for:
Here the average flow for the last full hour is indicated.
F3 Average flow today
Press three times for:
Here the average flow from 12:00:00AM to the current
time is indicated. The display is updated every second.
F4 Average flow 24 HR
Press four times for:
Here the average flow for the last full 24 hours is indicated
(12:00:00AM to 11:59:59PM).
Totalizer key SQ(t)
This key will give access to indication of summed quanti-
ties.
F5 Totalizer
Press once for:
Here the total quantity is indicated, from when the value
was last reset. The quantity is updated every second
and is indicated with time and date. The value is reset by
pressing ENTER.
F6 Totalizer 1 hour
Press twice for:
Here the summed quantity for the previous full hour is in-
dicated (e.g. 11:00AM -12:00PM).
F7 Totalizer today
Press three times for:
Here the summed quantity for today is indicated. The re-
sult along with the time interval is updated every second.
The value is reset by pressing ENTER.
F8 Totalizer 24 hour 99 days log
Press four times for :
Here the 24 hours summed quantity log is indicated. The
quantity and the date for the previous day are logged ev-
ery 24 hours (12:00:00AM). The log goes back 99 days.
The arrow keys are used for accessing the log.
Note, that the MJK 713 must have been in service for
at least 24 hrs before the last 24 hr log will contain valid
data, and at least 99 days before the full 99 days log will
contain valid data.