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JUMO 902020/10, Operating Manual

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JUMO 902020/10 Operating Manual Download Page 8

2 Introduction

8

Cold junction

Not required

Required

Measuring current supplied Yes

No

Measuring point

Sensor

Pair of thermal wires

Signal output

Resistance

Voltage

a

However, pronounced drift effects from approx. 400 °C

b

Depends on the operating temperatures

Factor

RTD temperature probe

Thermocouple

Summary of Contents for 902020/10

Page 1: ...90000000T90Z001K000 V1 00 EN 00759990 2022 01 20 Installing and Using JUMO Thermometers Operating Manual...

Page 2: ......

Page 3: ...3 5 1 Two wire circuit 16 3 5 2 Three wire circuit 16 3 5 3 Four wire circuit 16 4 Thermocouples 17 4 1 Design 17 4 2 Operating principle 19 4 3 Thermocouple types 20 4 4 Type K thermocouples 21 5 Li...

Page 4: ...tion situations 34 8 2 7 Electrical connection 35 8 3 Functional test 36 8 4 Maintenance 37 8 5 Dismounting 38 9 General product information 39 9 1 Connection types 39 10 Troubleshooting 42 11 Mainten...

Page 5: ...pective precautionary measures are not taken 1 1 2 Note symbols Note symbols NOTE This symbol refers to important information about the product its handling or additional benefits READ THE DOCUMENTATI...

Page 6: ...ance with its proper use a failure to observe the specifications in this manual the use of unqualified personnel unauthorized conversions or modifications the use of external spare parts DANGER Non ap...

Page 7: ...coding for the connection lines and resistance mea surements between the connection poles thermometers are also identified by their nameplates and la beling Labeling example NOTE The fabrication numb...

Page 8: ...ed Measuring current supplied Yes No Measuring point Sensor Pair of thermal wires Signal output Resistance Voltage a However pronounced drift effects from approx 400 C b Depends on the operating tempe...

Page 9: ...nting thread DIN 43766 Welded stem thermometers DIN 43767 Thermometers not fitted with protecting tubes DIN 43769 Fast response thermometers DIN 43771 In some cases individual components are also desc...

Page 10: ...sert for RTD temperature probes 5 5 Measuring insert Contains the temperature sensor Replaceable or permanently installed Version with connection socket or transmitter is commonly found 1 Connection p...

Page 11: ...s with immersion sleeves the need to open the process can be avoided for example to replace the thermometer or measuring insert 2 Process connection Interface with the process Thread flange etc 3 Tran...

Page 12: ...cteristic line has been defined between 200 C and 850 C according to DIN EN 60751 However the standard stipulates that limit deviations are only defined up to max 660 C As a result resistance measurem...

Page 13: ...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 s...

Page 14: ...3 RTD temperature probe 14 Platinum ceramic temperature sensors type PK Platinum chip temperature sensors on an epoxy PCB type PCSE...

Page 15: ...1 3 Class B Class A Class B Class 0 5 Tolerance class Sensor category Temperature range Tolerance F 0 1 Thin film 0 to 150 C 0 1 K 0 0017 t F 0 15 Thin film 30 to 300 C 0 15 K 0 002 t F 0 3 Thin film...

Page 16: ...chapter 5 1 1 Correcting line resistances Page 22 Minor deviations in the line resistance may occur due to fluctuations in temperature and the production process 3 5 2 Three wire circuit With three w...

Page 17: ...rmometers with interchangeable sensor units DIN 43764 Threaded stem thermometers with G 1 2 mounting thread DIN 43765 Threaded stem thermometers with G 1 mounting thread DIN 43766 Welded stem thermome...

Page 18: ...or measuring insert 2 Process connection Interface with the process Thread flange etc 3 Extension tube Protects the components such as the transmitter against excess temperatures in the area of the te...

Page 19: ...rge carriers to move The extent to which the charge carriers move depends on the electrical features of the material If two wires made of different materials are connected and exposed to a temperature...

Page 20: ...es involved use of the devices at higher temperatures may quickly alter the orig inal tolerance class supplied aging The user must evaluate the extent of the drift aging caused by the operating condit...

Page 21: ...ing to changes of up to 5 K in the output signal Thermo couple type Admissible limit deviations C Validity limits for temperature C Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Type T 0 5 C or 0 00...

Page 22: ...outed separately from the lines of the power electronics 5 1 Lines of RTD temperature probes Connection lines of RTD temperature probes are available with a range of sheath and stranded wire in sulati...

Page 23: ...s for copper stranded wires at room temperature A loop resistance m can also be estimated for stranded wires made of thermal material for thermo couples the specifications apply for room temperature F...

Page 24: ...cable NiCr Ni element type K made of thermal material The limit deviations in V or K only apply at the measurement temperature right hand column here This is due to the non linear nature of the thermo...

Page 25: ...i K Green Green White NiCrSi NiSi N Pink Pink White NiCr CuNi E Lilac Lilac White Pt10Rh Pt S Orange Orange White Pt3Rh Pt R Orange Orange White Element Type Sheath Positive leg Negative leg Cu CuNi U...

Page 26: ...g cable Element Type Sheath Positive leg Negative leg Cu CuNi T Green Black Red Fe CuNi J Black White Red NiCr Ni K Yellow Yellow Red NiCrSi NiSi N Orange Orange Red NiCr CuNi E Purple Purple Red Pt10...

Page 27: ...rmocouples please either ensure that you use contact materials that have the same thermoelec tric features as the thermocouple itself or ensure that the temperature is uniformly distributed within the...

Page 28: ...tion length of 100 mm and flow velocities of 10 m s in air and 4 m s in water temperature range 20 to 100 C safety factor 1 8 The following table can be used if different materials are being used Ther...

Page 29: ...nal has to cover If required a transmitter can also be latched into the line NOTICE Damage to property due to high ambient temperatures The device s functionality cannot be ensured and there is a risk...

Page 30: ...tallation location Information on this is provided in the following subchapters The plant s process connection must match the thermom eter connection The probes should be inserted slowly into any proc...

Page 31: ...depth 5 to 10 the protection tube diameter For measurements in gaseous media an immersion depth 15 to 20 the protection tube diameter If a sufficient immersion depth cannot be provided due to a lack o...

Page 32: ...r If the cables have not been properly routed it will not be possible to ensure a reliable seal or compliance with the protection types 8 2 2 Screw in thermometer NOTE Do not exceed the specified maxi...

Page 33: ...thermocouples the ideal solution is to select a suitable thermal cable It is also possible to use compensating cables provided they have been selected very carefully With mineral insulated thermocoup...

Page 34: ...rming from conden sation rainfall etc Moisture must not be allowed to form permanently on the cable fitting Always install the thermometers upright as far as possible and no further than 70 from verti...

Page 35: ...rity will cause major measurement deviations Ensure that the polarity is correct for thermocouples NOTE When establishing the electrical connection for RTD temperature probes bear in mind the correcti...

Page 36: ...correctly Is the connection area in an area with a uniform constant temperature particularly for thermocou ples Has the minimum immersion depth been achieved Are the installation location and line ro...

Page 37: ...e for thermocouples The specifications in the standard are decisive Drift effects in temperature probes caused by moisture are often not detected but nevertheless cause significant measurement deviati...

Page 38: ...the relevant accident prevention regulations and safety requirements for electrical devices NOTICE Damage to property due to the type of process medium Improper handling may cause liquid to escape fr...

Page 39: ...erve the connection di agrams Connection instructions Identification marking for stranded wires on RTD temperature probes Connection type RTD temperature probes Two wire Three wire Four wire 2x Pt Sta...

Page 40: ...black black white Color sequence white red black 4 conductor line 1x three wire 1x four wire 2x Pt Color sequence DIN 47100 white brown green yellow Color sequence VDE 0293 0 black black brown blue C...

Page 41: ...y pink Color sequence VDE 0293 0 black black black red blue transparent Color sequence red red blue white blue white blue blue natural Alternatively red red gray white blue blue Color sequence red red...

Page 42: ...high input resistance Data displayed is too high or too low by a fixed amount Incorrect cold junction tempera ture Acquire the cold junction tem perature Data displayed correctly drifts slowly Cold ju...

Page 43: ...ossible cause Remedy Time behavior is very slow or measured values are delayed Deposits on the protection tube Clean the protection tube Protection tube diameter is too large Modify the protection tub...

Page 44: ...res NOTE The device may only be disassembled in a safe and voltage free state of the plant by qualified personnel NOTE All information necessary for return is included in the Supplementary sheet for p...

Page 45: ...ses 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 Matthias Nau 20...

Page 46: ...12 Further information and downloads 46...

Page 47: ......

Page 48: ...oy Road East Syracuse NY 13057 USA Delivery address Mackenrodtstra e 14 36039 Fulda Germany Phone Fax Email Internet 44 1279 63 55 33 44 1279 62 50 29 sales jumo co uk www jumo co uk Phone Fax Email I...

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