Kobold LTS-A Manuale utente
Operating Instructions
for
Resistive Temperature Sensor
Model: LTS
LTS
page 2 LTS K05/0422
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 3
5.Operating Principle ........................................................................................ 4
5.1Special ................................................................................................. 4
6.Mechanical Connection ................................................................................. 5
7.Electrical Connection .................................................................................... 6
7.1Pt 100 without transmitter .................................................................... 6
7.2Pt 100 with transmitter ......................................................................... 8
8.Technical Information .................................................................................... 9
8.1Mechanical Information ........................................................................ 9
8.2Electrical Information ........................................................................... 9
8.3Transmitter for LTS-A (with connection box) ...................................... 10
9.Order Codes ............................................................................................... 11
10.Dimensions ................................................................................................. 12
11.Accessories ................................................................................................. 15
12.EU Declaration of Conformance ................................................................. 17
13.UK Declaration of Conformity ...................................................................... 18
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: +49(0)6192-2990
Fax: +49(0)6192-23398
E-Mail: [email protected]
Internet: www.kobold.com
LTS
LTS K05/0422 page 3
2. Note
Please read these operating instructions before unpacking and putting the unit
into 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 corresponds 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:
Resistive Temperature Sensor model: LTS
4. Regulation Use
Any use of the Resistive Temperature Sensor, model: LTS, 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.
LTS
page 4 LTS K05/0422
5. Operating Principle
The change in resistance of platinum in relation to the temperature to be
measured is used for temperature measurement with the KOBOLD Resistive
Temperature Sensors LTS.
The devices are connected electrically with 2- or 3-wire technology, depending on
the input of the evaluation device and the line length. Alternatively, the
temperature sensor can be connected to a 4-20 mA current input (2-wire current
loop) through the built-in 2-wire transmitter. The temperature sensors with a
connection that is cavity free (...T, ...M) are fitted with a food-compatible metallic
sealing system, that forms a hygienic measuring point in conjunction with the
associated weld-in sleeve LZE (confirmed by the EHEDG).
Sensor Tips and Response Times
All temperature sensors are available with tapered tips to ensure faster response
times. The times specified below refer to a resistive temperature sensor
immersed in boiling water.
5.1 Special
The temperature sensors with neck well are suited for measuring permanently
high temperatures (up to 250 °C).
Appropriate neck tube versions should be used at process temperatures above
70 °C if the transmitter is integrated, and above 100 °C in case of a separated
transmitter.
LTS
LTS K05/0422 page 5
6. Mechanical Connection
The LTS temperature sensors are available with a non-hygienic G ½ process
connector (R4) or alternatively with hygienic connections for food processing.
Only with these process connection options M12x1.5 (M3) and G ½ (G4),
combined with our hygienic LZE fittings, an EHEDG-certified dead space free
monitoring point based on hygienic design principles is possible.
(See chapter 11. Accessories)
Proper torque values for these two options are:
M12x1.5 = 10 - 15 Nm
G ½ = 15 - 20 Nm
LTS
page 6 LTS K05/0422
7. Electrical Connection
7.1 Pt 100 without transmitter
7.1.1 Plug connection at compact version
(LTS-K…M0 and LTS-A…M0)
1 x Pt 100 2-wire 2 x Pt 100 2-wire
1 x Pt 100 3-wire
LTS
LTS K05/0422 page 7
Terminal connections at version connection box (LTS-A…K0)
cable connection M16x1,5
1 x Pt 100 2-wire 2 x Pt 100 2-wire
1 x Pt 100 3-wire
LTS
page 8 LTS K05/0422
7.2 Pt 100 with transmitter
The transmitter converts the resistance of the PT100 into a temperature-
proportional 4-20mA standard current signal.
Thus, the current loop carries both the supply current and the measurement
signals.
The module is integrated into the head of the temperature sensor.
Make sure the electrical power supply cables are de-energized.
Connect the transmitter as shown in the connection schemes below.
We recommend a minimum power supply cable cross section of 0.25 mm².
Warning! Wrong electrical connections may lead to the destruction
of the electronic circuit!
Plug connection at compact version (LTS-K…6Mx)
Terminal connections at version connection box (LTS-A…6Kx)
connection plug M16x1,5
LTS
LTS K05/0422 page 9
8. Technical Information
8.1 Mechanical Information
Max. pressure: 10 bar
Material: stainless steel 1.4404
Process connection: M 12 x 1.5 hygienic (with sleeve LZE),
G 1/2 hygienic (with sleeve LZE),
G 1/2 AG DIN 3852-2 without screw thread
(for clamp screwing LZE-M1, LZE-S1)
Sensor length: 20, 50, 100, 150, 250 mm,
special length up to max. 1000 mm
Electrical connection
Compact device: LTS-K: M 12 x 1-plug
Connection box: LTS-A: cable connection M 16 x 1.5
optional: M 12 x 1-plug
Max. current: 1 mA
Protection: IP 67
Weight: LTS-K: 0.3 - 2 kg
LTS-A: 0.5 - 2 kg
8.2 Electrical Information
8.2.1 Measuring sensor
Measuring principle: Pt 100, Class A acc. DIN IEC 751
Sensors: 1 or 2 Pt 100 per device (2-wire)
Measuring range: without transmitter:
-50…+250 °C (from 70 °C use only with
neckwell!)
Ambient temperature: -20…+80 °C
Tolerances Class A: 0 °C: ±0.15 K, 100 °C: ±0.35 K
LTS
page 10 LTS K05/0422
8.2.2 Transmitter for LTS-K (compact version)
Standard meas. range: -10…+40 °C
0…50 °C
0…100 °C
0…150 °C
0…200 °C
(from 70 °C only with neck well!)
Special meas. range: within -50…+250 °C
min. measuring range: 50 °C
Accuracy of electronics: ±0.2 % of reading ±0.2 °C
Accuracy of sensor: DIN Class B
Output: 4-20 mA corresponds to meas. range (2-wire)
Power supply: 10…30 VDC
Allowable load: RA≤(UV-10 V) / 0.022 A
Ambient temperature: -25…+70 °C
Humidity: 0…98 % r.H. (non-condensing)
Electrical connection: M12x1 plug
8.3 Transmitter for LTS-A (with connection box)
Input: 3-wire, Pt 100
Standard meas. range: -10…+40 °C
0…50 °C
0…100 °C
0…150 °C
0…200 °C
(from 70 °C only with neck well!)
Special meas. range: within -50…+250 °C
min. measuring range: 10 °C
Typical accuracy: ±0.15 % of measuring range
Output: 4…20 mA, temperature linear
Function: sensor breakage detection
Power supply: 8…32 VDC
Ambient temperature: -40…+85 °C
Galvanic isolation: no
Electrical connection: screw terminal
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