Kobold MM Series, MM05, MM07, MM08, MM13 Operating Instructions Manual
...
Operating Instructions
for
Liquid Level Transducer
Model : MM Series
MM series
page 2 DT0593
1 Contents
1 Contents ........................................................................................................ 2
2 Note .............................................................................................................. 3
3 Instrument Inspection .................................................................................... 3
4 Regulation Use .............................................................................................. 4
5 Float designs ................................................................................................. 4
6 Operating Principle ........................................................................................ 5
7 Mechanical Connection ................................................................................. 5
8 Area of application ........................................................................................ 5
9 Maintenance .................................................................................................. 6
10 Technical details ........................................................................................... 6
11 Head transmitter ............................................................................................ 7
12 Display .......................................................................................................... 8
13 Electrical Connection .................................................................................... 8
13.1 General ................................................................................................ 8
13.2 Wiring diagram resistance output sensor ............................................. 8
13.3 Wiring diagram with transmitter ........................................................... 9
13.4 Wiring diagram with touch screen LCD display type D ........................ 9
13.5 Wiring diagram with touch screen LCD display type R ........................ 9
13.6 Wiring diagram with LCD display type C .............................................. 9
13.7 Wiring diagram with LED display type E .............................................. 9
13.8 Electrical connection in intrinsically safe mode Ex ia ......................... 10
13.9 Electrical connection in explosion proof mode Ex d ........................... 10
14 Safety Instructions ( ATEX ) ........................................................................ 11
14.1 Area of validity ................................................................................... 11
14.2 Guidelines. ......................................................................................... 11
14.3 Protection against ESD ( electro static discharges ) .......................... 12
14.4 Chemical resistance ........................................................................... 12
14.5 Maintenance and repairs ................................................................... 12
14.6 Storage .............................................................................................. 12
15 Installation in hazardous zone ..................................................................... 13
16 ATEX Label Description .............................................................................. 13
17 Declaration of conformity ATEX Ex ia ......................................................... 14
18 Declaration of conformity ATEX Ex d .......................................................... 15
19 Declaration of conformity ............................................................................ 16
20 EC-TYPE CERTIFICATE ............................................................................ 17
21 Notes ........................................................................................................... 27
Manufactured by:
Kobold Mesura S.L.U.
Avda. Conflent 68 nave 15
08915 Badalona
Tel.: +34 93 460 38 83
Fax: +34 93 460 38 76
E-Mail: info.es@kobold.com
Internet: www.kobold.com
Edition: June 2017
MM series
page 3 DT0593
2 Note
Please read these operating instructions before unpacking and setting the unit into
operation. Follow the instructions precisely as described herein.
The devices are only to be used, maintained and serviced by persons familiar with
these operating instructions and in accordance with local regulations applying to
Health & Safety and prevention of accidents.
When used in machines, the measuring unit should be used only when the
machines fulfil the EC-machine guidelines.
3 Instrument Inspection
Instruments are inspected before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of the
delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, since they are responsible for damages during
transit.
Scope of delivery:
The standard delivery includes:
Liquid Level Transducer model: MM-...
Operating Instruction
Caution: Heavy mechanical stress, such as bending, impact or shock
loads to the level transducer could damage the transducer and/or the
magnet.
MM series
page 4 DT0593
4 Regulation Use
Kobold level transducers are used for the continuous level indication and level
control of all kinds of liquids. The simple design with only one moving part (the
float) is suitable for applications that demand reliability. Kobold level transducers
allow the continuous level indication and level control of liquids unaffected by
electrical conductivity, temperature, pressure. The level transducer may only be
used in liquids that will assure free movement of the float. The following points
must be noted:
no large particles
density of the fluid must not be less than that specified for the float type
pressure and temperature to be held within the limits given in the technical
specifications
A variety of transducers in various designs, connecting configurations and
materials are available for the acquisition of the measuring values.
Attention! These units should not be installed in the vicinity of strong
magnetic fields, since this can impair their intended functionality.
5 Float designs
Model Form Materials
Float
Outside
[mm]
Height
[mm]
Bore
Hole
[mm]
Min. Liquid
Density
[kg/dm³]
Max.
Temperature
°C
Nominal
Pressure
[bar] at
20 °C
MM05
Cylinder
hollow
PP 42 40 14 > 0.6 -10...+80°C 3 bar
MM07
Cylinder
hollow
PVC-U 42 40 14 > 0.9 0...+60 °C 3 bar
MM08
Cylinder
hollow
St. steel
1.4404
44 52 15 > 0.65 -20...+130°C 20 bar
MM10
Ball
hollow
St. steel
1.4404
52 52 15 > 0.6 -20...+130°C 30 bar
MM13
Cylinder
hollow
PVDF 38 60 18 > 0.6 -10...+125°C 2 bar
MM15
Cylinder
hollow
PP 60 60 18 > 0.4 -10...+80ºC 6 bar
MM16
Cylinder
hollow
PVC-U 60 60 18 > 0.6 0...+60°C 3 bar
MM20
Ball
hollow
St. steel
1.4404
95 95 20.8 > 0.5 -10...+130°C 15 bar
MM series
page 5 DT0593
6 Operating Principle
The Kobold-liquid Level Transducers consist of a tube on which a float travels with
inserted magnet, similar to the Kobold level float switch, in models without float on
the tube, the float is placed in and adjacent bypass tube to actuate the reed chain
contacts, however, in the MM, the magnet remotely actuates the reed contacts
inside the tube.
However, the well-known principle of the level float switch has been changed, in
such a way that the tube of the level transducer contains an electric resistance
chain and a reed contact chain.
The float remotely actuates the contacts through the tube wall and a voltage
proportional to the liquid level can be taken from the chain. This voltage sensing
corresponds to the function of the slide of a resistance potentiometer.
7 Mechanical Connection
The reed chain tube should not be bent or exposed to hard impacts, since
otherwise the reed contacts inside the tube can be damaged.
Ensure the correct use of cable gland and gasket on float switches with plug to
prevent the penetration of humidity.
While installation is carried out, please ensure that the float can move freely (due
allowance should be given to distances from side-walls!).
Mounting position of the slide-tube may not deviate more than ±30° from vertical
position.
If the float has to be removed, pay attention to correct orientation when replacing
the float.
8 Area of application
Magnetic level sensor MM series are used exclusively for level control and
monitoring of liquid media.
The liquids should not contain suspended solids or tendency to crystallize.
Ensure that the construction materials of the float switch have chemical resistance
sufficient to prevent mechanical deformations that may affect it.
MM series
page 6 DT0593
9 Maintenance
In liquids that can cause deposits, the float has to be cleaned at regular intervals.
In this case the measuring tube and float should be cleaned from such deposits
(valid for models where float is directly guided on the reed chain). Other
maintenance jobs are not required.
10 Technical details
Power supply: Output resistance: max. 24Vdc, 125 mW.
Ex ia parameters: Pi: 1,2W
Output 4…20 mA and 4…20 mA HART
®
: 8…35 Vdc
Ex ia parameters: Ui:30 Vdc, Ii: 120 mA, Pi: 0,84 W,
Li: 10uH, Ci: 1 nF
Output transmitter PROFIBUS
®
/FIELDBUS® : 9…32 Vdc
Ex ia parameters:
Ui:30 Vdc, Ii: 120 mA, Pi: 0,84 W,
Li: 1uH, Ci: 2 nF
Version with display model D: 14,5…35 Vdc
Ex ia parameters:
Ui:30 Vdc, Ii: 100 mA, Pi: 0,75 W,
Li: 10uH, Ci: 15 nF
Version with display model R: 14,5…35 Vdc
Relays 0…60 Vp, 75 mA
Ex ia parameters display:
Ui:30 Vdc, Ii: 100 mA,
Pi: 0,75 W, Li: 10uH, Ci: 15 nF.
Ex ia parameters relays:
Ui:30 Vdc, Ii: 75 mA, Pi: 0,75 W,
Li: 10uH, Ci: 10 nF
Version with display model C: 10…35 Vdc
Version with display model E: 11,7…35 Vdc
Protection type: IP65 (IP68 possible with housing type L, C,
and E)
Min. liquid density: See float design table
Min. measuring length “L”: 300 mm
Max. measuring length “L”: 6000 mm (types M08, M10, M20)
5000 mm (types M15, M17, M13)
2000 mm (types M05, M07)
MM series
page 7 DT0593
Max. pressure (at 20ºC): 2 bar (type M13)
3 bar (type M05, M07, M16)
6 bar (type M15)
15 bar (type M20)
20 bar (type M08)
30 bar (type M10)
Max. temp. with PVC cable: 60ºC (type M07, M16)
70ºC (type M05, M15, M13, M08, M10, M20)
Max. temp. with. silicone cable: See max. temperature in float design table
Resolution: 10 mm
Accuracy: Formula in accordance to the measuring length
10 x 100 : measuring length = accuracy %
e.g.: 10 x100 : 2000 = 0,5 %
Resistance value: 36 Ω for each 10 mm, when total
length <1900 mm
10 Ω for each 10 mm, when total
length ≥1900 mm
e.g.: 2000 : 10 x 10 = 2000 ohms
1800 : 10 x 36 = 6480 ohms
Material: PVC-U, PP, PVDF, 1.4404
(others on request)
Process connection: G 3/8, G 1/2, G 1, G 1 ½, G 2, 3/8” NPT,
½” NPT, 1” NPT, 1 ½” NPT, 2” NPT and
flanged version. (others on request)
11
Head transmitter
Model 5333D: analogue output 4…20 mA, 2 wires,
Sensor error action : Namur upscale (23 mA)
Model 5337D: analogue output 4…20 mA HART
®
-protocol, 2 wires
Sensor error action : Namur upscale (23 mA)
Model 5350B : PROFIBUS
®
/FIELDBUS®
MM series
page 8 DT0593
12 Display
- Only for 4…20 mA or HART
®
transmitters.
- Supply Voltage: loop powered
- Voltage dropout: max. 4 or 6,5 Vdc model D
max. 3,7 Vdc model E
max. 2,5 Vdc model C
Note
For programming of transmitter and/or display please refer to their separates
programming manual.
13 Electrical Connection
13.1 General
- Make sure that the supply wires are de-energized.
- To reduce the possibility of interference from other electric circuits, the
cables should be wired separately.
- Please pay attention to the potentially detrimental operating conditions
regarding the placement of the cable.
- Connect the level transducer to the electronic in accordance with the
connection diagrams below.
13.2 Wiring diagram resistance output sensor
Resistance value
increases
proportionally
with level
increase.
Resistance value
decreases
proportionally
with level
increase.
Signal
Models with cable white Brown Green
Models with box Clamp 1 Clamp 2 Clamp 3
MM series
page 9 DT0593
13.3 Wiring diagram with transmitter
13.4 Wiring diagram with touch screen LCD display type D
13.5 Wiring diagram with touch screen LCD display type R
13.6 Wiring diagram with LCD display type C
13.7 Wiring diagram with LED display type E
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