Related Manuals for JUMO 902020/10
Summary of Contents for JUMO 902020/10
- Page 1 Installing and Using JUMO Thermometers Operating Manual 90000000T90Z001K000 V1.00/EN/00759990/2022-01-20...
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Page 3: Table Of Contents
Contents Contents Basic information ..........5 Safety information . - Page 4 Contents 8.2.4 Mineral-insulated thermocouples and RTD temperature probes .....33 8.2.5 Surface probe for surface measurements........33 8.2.6 Special installation situations .
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Page 5: Basic Information
Basic information 1 Basic information Safety information 1.1.1 Warning symbols DANGER! This symbol indicates that personal injury from electrocution may occur if the appropriate precaution- ary measures are not taken. WARNING! This symbol in connection with the signal word indicates that personal injury may occur if the respective precautionary measures are not carried out. -
Page 6: Intended Use
1 Basic information Intended use NOTE! To ensure operational safety, it is essential to use the thermometers properly and install them correctly. Before carrying out installation work, it is therefore crucial to familiarize yourself with the thermometer, its proper use, and the installation process. This document is a key reference work in this respect, along with product-specific operating manuals in individual cases. -
Page 7: Introduction
Improperly performed work will result in personal injury or damage to property. As a basic principle, installation and startup work for JUMO thermometers may only be performed by qualified and authorized personnel who strictly follow this manual, the relevant standards and le- gal regulations, the safety provisions, and the application-specific certificates. - Page 8 2 Introduction Factor RTD temperature probe Thermocouple Cold junction Not required Required Measuring current supplied Yes Measuring point Sensor Pair of thermal wires Signal output Resistance Voltage However, pronounced drift effects from approx. 400 °C Depends on the operating temperatures...
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Page 9: Rtd Temperature Probe
RTD temperature probe 3 RTD temperature probe Design An RTD temperature probe essentially comprises a temperature sensor, connection lines, and a protec- tion tube. The temperature sensor is connected to a connection line/connection wires, insulated, and in- serted into a protection tube (usually filled with a heat-conducting medium). The connection side can be designed as a line end that has been kept free, or designed with a terminal head, with a connector, etc. - Page 10 3 RTD temperature probe Measuring insert • Contains the temperature sensor • Replaceable or permanently installed • Version with connection socket or transmitter is commonly found Example schematic of the construction of a measuring insert for RTD temperature probes: Connection points Sensor Protection tube Filled with heat-conducting medium...
- Page 11 3 RTD temperature probe Variant with connection line Protection tube • In contact with the process • Protects the measuring insert against the medium (pressure, flow, etc.) • On versions with immersion sleeves, the need to open the process can be avoided, for example to replace the thermometer or measuring insert Process connection •...
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Page 12: Operating Principle
3 RTD temperature probe Operating principle RTD temperature probes take advantage of the temperature-dependent change in the resistance of the metals. For PTC resistors (PTC; positive temperature coefficient) such as platinum, the resistance in- creases as the temperature rises. Resistance/ohm Temperature/°C For thermistors (NTC;... -
Page 13: Sensor Types
3 RTD temperature probe Sensor types Sensors come in different versions. We essentially distinguish between thin-film sensors and sensors with a solid wire winding. The most common sensors are shown below. Platinum-chip temperature sensors with connection wires, type PCA... - Page 14 3 RTD temperature probe Platinum-ceramic temperature sensors, type PK Platinum-chip temperature sensors on an epoxy PCB, type PCSE...
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Page 15: Tolerance Classes
3 RTD temperature probe Tolerance classes Change in tolerance depending on the measurement temperature (thin film) Measurement temperature/°C 1/3 Class B Class A Class B Class 0.5 Tolerance classes – temperature validity range (from DIN EN 60751) Tolerance class Sensor category Temperature range Tolerance F 0.1... -
Page 16: Circuit Types
3 RTD temperature probe Circuit types 3.5.1 Two-wire circuit The two-wire circuit is the simplest circuit type for RTD temperature probes. Three and four-wire circuits are also used to enable more accurate measurements. With two-wire circuits, the line resistance influences the measurement result. This means that to obtain accurate measurement results, the line resistance must be deducted or needs to be corrected at the evaluation electronics;... -
Page 17: Thermocouples
Thermocouples 4 Thermocouples Design A thermocouple essentially comprises a pair of thermal wires, which can be insulated and are inserted into protection tubes. The thermal wires are connected to thermal or compensating cables. Their con- nection side can be designed as a line end that has been kept free, or designed with a terminal head, with a connector, etc. - Page 18 4 Thermocouples Variant with terminal head Protection tube • In contact with the process • Protects the measuring insert against the medium (pressure, flow, etc.) • On versions with immersion sleeves, the need to open the process can be avoided, for example to replace the thermometer or measuring insert Process connection •...
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Page 19: Operating Principle
4 Thermocouples Thermocouples may be insulated or non-insulated/grounded. Insulated construction Non-insulated construction The non-insulated construction produces faster response times. However, no electrical insulation and no galvanic isolation between the thermocouple and the protection tube can be provided here. Take this into account when connecting the thermocouple, so as to prevent potential entrainments, etc. -
Page 20: Thermocouple Types
4 Thermocouples Thermocouple types Below you will find a table of thermocouples listing standardized voltage series and limit deviations. In this context, the maximum temperature is the temperature up to which the limit deviations have been defined. The voltage series has been standardized up to the temperature listed under "Defined up to." Thermocouples according to DIN EN 60584/IEC 584 Element Maximum... -
Page 21: Type K Thermocouples
4 Thermocouples Limit deviations according to DIN EN 60584 Thermo- Admissible limit deviations (±°C) Validity limits for temperature (°C) couple Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 type Type T 0.5 °C or 1 °C or 1 °C or -40 to +350 -40 to +350... -
Page 22: Lines
Lines 5 Lines All lines used must be in perfect electrical order and must not exhibit any damage. Corrosion, humidity, or pollutants on the lines must be prevented and removed if required. Lines with glass fiber insulation or wire mesh may only be used in dry areas. In this case, the presence of moisture can cause shunts or the formation of additional galvanic elements. - Page 23 5 Lines An almost constant error is produced with two-wire circuits depending on the stranded wire cross section and the line length. This error can be corrected at the evaluation unit (by using zero point correction, for example). However, the resistance of the connection line also depends on the temperature. This addi- tional influence cannot be taken into account.
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Page 24: Lines Of Thermocouples
5 Lines Lines of thermocouples Thermal cables or compensating cables can be used for thermocouples. Thermal and compensating cables differ as follows: Thermal cables are made of the same material as the element itself. Compensating cables are made of special materials with identical thermoelectric features in restricted temperature ranges. - Page 25 5 Lines Color coding for elements according to DIN EN 60584 Element Type Sheath Positive leg Negative leg Cu-CuNi "T" Brown Brown White Fe-CuNi "J" Black Black White NiCr-Ni "K" Green Green White NiCrSi-NiSi "N" Pink Pink White NiCr-CuNi "E" Lilac Lilac White...
- Page 26 5 Lines Color coding for elements according to ANSI MC96.1 (USA) – compensating cable Element Type Sheath Positive leg Negative leg Cu-CuNi "T" Green Black Fe-CuNi "J" Black White NiCr-Ni "K" Yellow Yellow NiCrSi-NiSi "N" Orange Orange NiCr-CuNi "E" Purple Purple Pt10Rh-Pt "S"...
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Page 27: Cable Ends And Connectors
5 Lines Cable ends and connectors Some examples of the cable ends and connectors used for thermometers are shown below: Bare Ferrules Ring cable lug Forked cable lug Some examples of parts used as connectors are shown below: LEMO connector Thermo connector/coupling M12 connector JST terminal strip... -
Page 28: Protection Tubes
Protection tubes 6 Protection tubes Various parameters (such as temperature, pressure, and oscillations) place loads on thermometers and their protection fittings. The protection fittings must therefore be designed accordingly. The variables in this respect include the material, insertion length, and diameter. DIN 43772 contains an overview of various metal protection tubes for thermocouples and RTD tempera- ture probes. -
Page 29: Transmitter
Transmitter 7 Transmitter Transmitters convert the sensor signal into a standardized, temperature-linear current or voltage signal. The advantage of two-wire transmitters is that they amplify the signal, making it much less sensitive to interference. Several design types are available for positioning the transmitter as required. To make the signal less susceptible to interference, the section covered by the non-amplified signal should be kept as short as possible. -
Page 30: Handling
Handling 8 Handling Transport Avoid vibrations when transporting the thermometer. Also ensure that the thermometer is not exposed to humidity. When the goods are received, check whether the packaging and thermometer are free of transport dam- age and mechanical damage. If you discover damage, do not use the thermometer. The devices must be stored properly. -
Page 31: Installation Location And Alignment
8 Handling 8.2.1 Installation location and alignment To ensure ease of access in the installation location, sockets are often used to mount the thermometers. Please note the following for the mounting work: The larger the immersion depth into the measurement medium, the more accurate the measurement re- sult will be as heat conduction errors will be reduced. -
Page 32: Screw-In Thermometer
8 Handling Avoid twisted and/or tensioned lines. For this reason, always route connection lines correctly. Route con- nection lines separately from the lines of the power electronics. The area around the thermometer must also be kept clean because aggressive media in particular could chemically attack the thermometer, potentially damaging the construction. -
Page 33: Welded-Stem Thermometer
8 Handling 8.2.3 Welded-stem thermometer The quality of the welded joint plays a crucial role in determining the leak-tightness and strength of the construction. WARNING! Personal injury and damage to property due to a poor-quality welded joint! Poor-quality welded joints in combination with high pressure or overheating can cause leaks. If touched, these can cause burns or destroy the device. -
Page 34: Special Installation Situations
8 Handling 8.2.6 Special installation situations When measuring temperatures below the ambient temperature, it is important to prevent condensate for- mation in the area of the electrical connection. Mount the line inputs and sealing areas such that any condensate that is formed can drain away. When routing the connection line, likewise bear in mind the possibility of moisture forming (from conden- sation, rainfall, etc.). -
Page 35: Electrical Connection
The terminal assignment must be implemented according to the connection diagram. If there is no con- nection diagram for a thermometer (such as those with a connection line), the table in chapter 9.1 "Connection types", Page 39 shows the relevant terminal assignment. Customer-specific terminal assignments may differ from the JUMO standards. NOTICE! Incorrect measurement results! Incorrect polarity will cause major measurement deviations. -
Page 36: Functional Test
8 Handling Functional test Startup checklist Is the thermometer suitable for the ambient temperatures? Is the thermometer suitable for the maximum operating temperature? Is the thermometer suitable for the maximum operating pressure? Is the protection tube resistant to the environment (chemicals, particles, etc.)? Has the thermometer's IP protection type been selected correctly? Is the connection area in an area with a uniform, constant temperature, particularly for thermocou- ples? -
Page 37: Maintenance
8 Handling Maintenance To ensure the thermometers work reliably, their functionality must be checked at regular intervals. This check should look at the functionality of the measuring circuits and whether there is any damage to the protection tubes. Individual items from the functional check (chapter 8.3 "Functional test", Page 36) can be repeated if re- quired. -
Page 38: Dismounting
8 Handling Dismounting WARNING! Risk of electric shocks! There is a risk of serious injury or even death. Before dismounting the device, switch off the voltage supply and release the electrical connections. Release process connections only when the device has been acclimatized and depressurized. Ad- just the temperature of the pipe/process in line with the ambient temperature. -
Page 39: General Product Information
9 General product information Connection types To ensure consistent terminal assignments for all measuring probe versions, JUMO RTD temperature probes and thermocouples are manufactured according to an in-house standard. This is a standard specification. Differing specifications are possible if desired by the customer. Observe the connection di- agrams. - Page 40 9 General product information Connection coding – lines 3-conductor line 1x three-wire Color sequence (DIN 47100): white, brown, green Color sequence (VDE 0293-0): black, blue, brown Color sequence (DIN 47100): red, red/blue, white Color sequence (IEC 751): red, red, white Color sequence: black, black, white Color sequence:...
- Page 41 9 General product information 5-conductor line 1x three-wire 1x four-wire 2x Pt Color sequence (DIN 47100): white, brown, green, yellow, gray 6-conductor line 2x three-wire 3x Pt Color sequence (DIN 47100): white, brown, green, yellow, gray, pink Color sequence (VDE 0293-0): black, black, black, red, blue, transparent...
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Page 42: Troubleshooting
Troubleshooting 10 Troubleshooting Specific errors for thermocouples Error Possible cause Remedy Indicating device displays room Thermocouple or line interrupted Replace measuring insert temperature Only the amount is correct on the Incorrect polarity on the indicat- Change the polarity display ing device Displayed temperature is much Incorrect polarity of the compen- Change the polarity... - Page 43 In particular, it is important to consider the specific installation situation in each case. It may be necessary or advisable to consult qualified personnel and the Technical Support team from JUMO. The contact addresses and telephone numbers can be found on the last page...
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Page 44: Maintenance, Cleaning, Returns, And Disposal
Maintenance, cleaning, returns, and disposal 11 Maintenance, cleaning, returns, and disposal 11.1 Maintenance The RTD temperature probes and thermocouples require no maintenance. We recommend checking them at regular intervals. 11.2 Cleaning NOTE! Avoid damage to the device due to improper cleaning. Do not damage the RTD temperature probes or thermocouples, in particular the parts in contact with the medium. -
Page 45: Further Information And Downloads
12 Further information and downloads Also consult the data sheet and, if available, the product-specific operating manual in individual cases. In addition to this manual, further information can be found in the download center at www.jumo.net: • Electrical Temperature Measurement with thermocouples and resistance thermometers;... - Page 46 12 Further information and downloads...
- Page 48 JUMO GmbH & Co. KG JUMO Instrument Co. Ltd. JUMO Process Control, Inc. Street address: JUMO House 6724 Joy Road Moritz-Juchheim-Straße 1 Temple Bank, Riverway East Syracuse, NY 13057, USA 36039 Fulda, Germany Harlow, Essex, CM20 2DY, UK Delivery address:...