Kobold MWD User manual

DT0621 page 1
Operating Instructions
for
Temperature Sensor
Model MWD

MWD
page 2 DT0621
1 Contents
1 Contents ............................................................................................................................................. 2
2 Note .................................................................................................................................................... 3
3 Instrument Inspection ......................................................................................................................... 3
4 Regulation Use ................................................................................................................................... 3
5 Operating Principle ............................................................................................................................. 4
6 Electrical connection ........................................................................................................................... 4
6.1 Sensor wiring diagram with head ............................................................................................... 4
6.2 Sensor wiring diagram without head .......................................................................................... 5
6.3 Transmitter wiring diagram ......................................................................................................... 6
6.4 Head model E wiring diagram .................................................................................................... 6
6.5 Head model D wiring diagram .................................................................................................... 7
6.6 Head model R wiring diagram .................................................................................................... 7
7 Maintenance and repairs .................................................................................................................... 8
8 Storage ............................................................................................................................................... 8
9 Technical Details ................................................................................................................................. 8
9.1 Sensor wiring .............................................................................................................................. 8
9.2 Sensor according to IEC 60751 .................................................................................................. 8
9.3 Tolerance class ........................................................................................................................... 8
9.4 General details ............................................................................................................................ 8
9.5 Transmitter 5333D ...................................................................................................................... 9
9.6 Transmitter 5337D ...................................................................................................................... 9
9.7 Transmitter 5350A ...................................................................................................................... 9
9.8 Display type E ............................................................................................................................. 9
9.9 Display type D/R ....................................................................................................................... 10
10 Trouble Shooting ........................................................................................................................... 11
11 Dismounting, return and disposal ................................................................................................. 12
11.1 Dismounting .............................................................................................................................. 12
11.2 Disposal .................................................................................................................................... 12
12 Order codes .................................................................................................................................. 12
13 EU-Declaration of conformity ........................................................................................................ 13
14 UK Declaration of Conformity ....................................................................................................... 14
Manufactured by:
Kobold Mesura S.L.U
Avda. Conflent 68 nave 15
08915 Badalona
Tel.: [phone]
Fax: [phone]
E-Mail: [e-mail]
www.kobold.com
Edition: May 2022

MWD
DT0621 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 instruction manuals on our website WWW.kobold.com are always for currently
manufactured version of our products. Due to technical changes, the instruction
manuals available online may not always correspond to the product version you
have purchased. If you need an instruction manual that correspond to the
purchased product version, you can request it from us free of charge by email
([email protected]) in PDF format, specifying the relevant invoice number and
serial number. If you wish, the operating instructions can also be sent to you by
post in paper form against an applicable postage fee.
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:
 Device model: MWD
4 Regulation Use
The temperature sensors of the MWD 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: MWD, 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.

MWD
page 4 DT0621
5 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.
6 Electrical connection
6.1 Sensor wiring diagram with head

MWD
DT0621 page 5
6.2 Sensor wiring diagram without head
2 wire
3 wire
4 wire

MWD
page 6 DT0621
6.3 Transmitter wiring diagram
6.4 Head model E wiring diagram

MWD
DT0621 page 7
6.5 Head model D wiring diagram
6.5.1 With transmitter 5333D
6.5.2 With transmitter 5337D
6.6 Head model R wiring diagram
6.6.1 With transmitter 5333D
6.6.2 With transmitter 5337D

MWD
page 8 DT0621
7 Maintenance and repairs
The instrument does not require maintenance or servicing.
Repairs must be only carried out by Kobold (manufacturer)
8 Storage
Measuring instruments should be protected against humidity and dust.
Storage temperature: -40 ºC…+85 ºC for sensors without transmitter.
Storage temperature: See manual of the corresponding transmitter and display
mode
9 Technical Details
9.1 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
9.2 Sensor according to IEC 60751
-Class B
-Class A
-Class 1/3
-Class 1/10
The nominal value of Pt100 sensors is 100Ω at 0 ºC.
9.3 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
9.4 General details
Ambient temperature: -40…+150 ºC with ceramic terminal block
-40…+85 ºC with transmitter

MWD
DT0621 page 9
9.5 Transmitter 5333D
Ambient temperature: -40...+85 ºC
Power supply: 8...35 V
Accuracy: Absolute accuracy ≤ ±0.3 ºC
Temp. Coefficient (≤ ±0.01 ºC/ºC)
Current Output: 4...20 mA
Load resistance: ≤ (V supply - 8) / 0.023
Sensor error detection: Programmable 3.5…23 mA
NAMUR NE43 Upscale and
NAMUR NE43 Downscale
9.6 Transmitter 5337D
Ambient temperature: -40...+85 ºC
Power supply: 8...35 V
Accuracy: Absolute accuracy ≤ ±0.1 ºC
Temp. Coefficient (≤ ±0.005 ºC /ºC)
Current Output: 4...20 mA HART®
Load resistance: ≤ (V supply - 8) / 0.023
Sensor error detection: Programmable 3.5…23 mA
NAMUR NE43 Upscale and
NAMUR NE43 Downscale
9.7 Transmitter 5350A
Ambient temperature: -40...+85 ºC
Power supply: 9...32 V
Accuracy: Absolute accuracy ≤ ±0.1 ºC
Temp. Coefficient (≤ ±0.002 ºC / ºC)
Output: PROFIBUS
® PA protocol
FOUNDATIONTM FIELDBUS protocol
9.8 Display type E
Ambient temperature: -40...+85 ºC
Supply Voltage: 7.5...45 V
Accuracy: High accuracy 0.02% of span
for Pt100 sensor
Output signal: 4...20 mA HART®
Load: ≤ (V
supply - 7.5 V)/0.022 A
Sensor error detection: According to the guidelines in
NAMUR NE89

MWD
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9.9 Display type D/R
Ambient temperature: -30...+80 ºC
Loop voltage drop: Two levels depending on chosen
backlight brightness at 20 mA:
low bright backlight (<40%):
max. 4 V at 23 ºC
high bright backlight (>40%)
max. 6.5 V at 23 ºC
Accuracy: ≤ ±0.1% of input span within
-10...70 ºC
≤ ±0.2% of input span within
-30...-10 ºC/70...80 ºC
Measuring range: 4...20 mA
Error/warning indication: Individually configurable display
and backlight indication in white,
green or red colour, steady or
between 3.5 and 23 mA
Relay (only type R): Contacts 2 solid state relays
Max. Voltage 60 Vp
Max. Load current 75 mA
Note: For programming of transmitter and/or display please refer to their separates
programming manual.