Kobold MMA User manual

Operating Instructions
for
Temperature Sensor
Model: MMA

MMA
Page 2 MMA 01/0621
1.Contents
1. Contents........................................................................................................2
2. Note ..............................................................................................................3
3. Safety............................................................................................................3
3.1 Personnel qualification.........................................................................3
4. Instrument Inspection....................................................................................3
5. Regulation Use..............................................................................................4
6. Operating Principle........................................................................................4
7. Electrical connection.....................................................................................5
7.1 Sensor wiring diagram.........................................................................5
7.2 Transmitter wiring diagram ..................................................................5
8. Maintenance and repairs...............................................................................6
9. Storage .........................................................................................................6
10. Technical Details...........................................................................................6
10.1 Sensor wiring.......................................................................................6
10.2 Sensor according to IEC 60751..........................................................6
10.3 Tolerance class....................................................................................6
10.4 General details.....................................................................................7
10.5 Transmitter 4...20 mA..........................................................................7
11. Trouble Shooting...........................................................................................8
12. Dismounting, return and disposal..................................................................9
12.1 Dismounting.........................................................................................9
12.2 Disposal...............................................................................................9
13. Order codes..................................................................................................9
14. Notes...........................................................................................................10
15. EU-Certificates............................................................................................11
Manufactured by: KOBOLD Instruments Inc.
1801 Parkway View Drive
Pittsburgh PA 15205-1422
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.koboldusa.com

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MMA01/0621 page 3
2.Note
Please read these operating instructions before unpacking and putting the unit in
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.Safety
Before installation, commissioning and operation, ensure that the appropriate
sensor is used.
Non-observance can results in serious injury and/or damage to equipment.
3.1 Personnel qualification
Improper handling can result in considerable injury and damage to equipment.
The instructions included in this manual may only be carried out by qualified
personnel.
4.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:
Device model: MMA
Operating Instructions

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5.Regulation Use
The temperature sensors of the MMA Series are suitable for all applications
where processes involving fluids, solid bodies or materials, or gases, require
temperature recording and measurement. Our temperature sensors are suitable
for use in the following industrial areas: chemicals, petrochemicals, water, feed,
food, sanitary, etc.
Any use of the Temperature Sensor, model: MMA, which exceeds the
manufacturer’s specification may invalidate its warranty. Therefore, any resulting
damage is not the responsibility of the manufacturer. The user assumes all risk
for such usage.
6.Operating Principle
Resistance thermometers work by using the continuous change of resistance of
metals subject to temperature rising and decreasing. The most
common resistance material used is platinum as it is very stable and has
very good repeatability. The temperature coefficient of platinum is positive, so
its resistance increases as the temperature rises. This property is defined
in the IEC751 standard, which defines measurements deviations categories A
and B.

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7.Electrical connection
7.1 Sensor wiring diagram
Connector type EN 175301-803 (DIN 43650)
7.1.1 Connector type M12
7.2 Transmitter wiring diagram
7.2.1 Connector type EN 175301-803 (DIN 43650)
1.1.1Connector type M12
Standard HART Modem

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8.Maintenance and repairs
The instrument does not require maintenance or servicing.
Repairs must be only carried out by Kobold (manufacturer)
9.Storage
Measuring instruments should be protected against humidity and
dust. Storage temperature: 1 - 176ºF (-25...80ºC)for sensors without
transmitter.
10.Technical Details
10.1 Sensor wiring
- 2 wires Error due to the lead resistance of the sensor
- 3 wires With connecting wires up to 25 m, lead resistance is negligible.
- 4 wires The lead resistance of the connecting wires is negligible
10.2 Sensor according to IEC 60751
-Class B
-Class A
-Class 1/3
-Class 1/10
The nominal value of Pt100 sensors is 100Ωat 0 ºC.
10.3 Tolerance class
-Class B ±0.3 + 0.005 * t
-Class A ±0.15 + 0.002 * t
-Class 1/3 ±0.10 + 0.005 * t
-Class 1/10 ±0.03 + 0.0017 * t
t= measuring temperature in ºC without sign

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10.4 General details
Ambient temperature:
With connector EN 175301-803 without transmitter: -40…+90 ºC
With connector EN 175301-803 with transmitter: -40…+85 ºC
WithdisplayAUF: -20…+80ºC
With connector M12 with or without transmitter: -25…+80 ºC
10.5 Transmitter 4...20 mA
Power supply: 7.5 to 45 V
Accuracy: 0.2K or 0.1% of span
Response time: 1s
Calibration temperature: +23 ºC (73.4K) ± 5K
Influence of ambient temperature: ≤±0.01%/V deviation from 24V.
Current Output: 4...20 mA.
Load: Rmax. =[(Usupply -7.5 / 0.022] Ω
Signal on alarm: Underranging lineal drop to 3.5 mA.
Overranging linear rise to 20.5 mA.
Sensor break; sensor open- 3.6 mA or
22 mA.
Range Configurable: The transmitter range is configurable
from PC through the KM-HART
interface and the KM-Soft software
Note: Please refer to KM-Software manual for Range configuration.

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11. Trouble Shooting
Faults Possible Causes Corrective actions
No signal/line breakage Mechanical load too high or
over temperature.
Line breakage.
Check power supply
Wrong measured values Sensor drift caused by over
temperature Replace probe
Sensor drift caused by
chemical attack Use a sensor with thermowell
Wrong measured values
(too low) Entry of moisture into cable Replace probe.
Check configuration of
output/range
Wrong measured values
and response times too long Wrong mounting geometry,
for example mounting depth
too deep or heat dissipation
too high
The temperature-sensitive
area of the sensor must be
inside the medium, and
surfaces must be isolated.
Deposits on the sensor or
thermowell Remove deposits
Oscillation of measured
value Cable break in connecting
cable or loose contact caused
by mechanical overload
Replace probe with a suitable
design, for example equipped
with a strain relief or a thicker
conductor cross-section.
Check wiring
Corrosion Composition of the medium
not as expected or modified
or wrong thermowell material
selected
Analyze medium and then
select a more-suitable material
or replace thermowell
regularly
Signal interference Stray currents caused by
electric fields
or ground loops
Use of screened connecting
cables,
increase the distance to
motors and
power lines
Ground loop Elimination of potentials, use
of galvanic isolated transmitter
supply isolators or transmitters

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12. Dismounting, return and disposal
12.1 Dismounting
Residual media in dismounted instruments can result in a risk to persons, the
environment and equipment. Take sufficient precautionary measures.
All instruments delivered to KOBOLD must be free from any kind of hazardous
substances (acids, bleaches, solutions, etc.).
12.2 Disposal
Incorrect disposal may endanger the environment.
13. Order codes
For order codes information, please see the KOBOLD USA datasheet.

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14.Notes