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IM CA71-E

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Remarque

Indique les informations essentielles à la manipulation de l’instrument ou qui

doivent être prises en compte afin de vous familiariser avec les procédures

d’utilisation et/ou l es fonctions de l’instrument.

Conseil

Ce qui suit indique des informations supplémentaires pour les explications.

Une électrocution ou d'autres facteurs peuvent entraîner des

dommages de l'instrument ou des blessures corporelles,

voire la mort. Pour éviter cela, suivez les précautions ci-dessous.

AVERTISSEMENT

• Utiliser l'instrument uniquement pour son but prévu

Cet instrument sert à générer (source)/mesurer la tension ou le courant.
(Cet instrument sert à générer et mesurer la résistance et à générer et à
mesurer la température à l'aide de résistances ou de thermocouples.)

Ne pas utiliser cet instrument à d'autres fins.

• Vérifier l'aspect physique

Ne pas utiliser l'instrument si son aspect physique présente une anomalie.

• Utilisation dans des gaz

Ne pas faire fonctionner cet instrument dans des zones où des gaz ou vapeurs

inflammables ou explosives existent. Il est extrêmement dangereux d'utiliser

l'instrument dans de tels environnements.

• Défauts des fonctions de protection

Ne pas utiliser cet instrument si un défaut semble exister dans de tels
dispositifs de protection comme par exemple, les fusibles.
Avant d'utiliser l'instrument, s’assurer que les dispositifs de protection sont
exempts de tout défaut.

• Connexion externe

Lors de la connexion de l'instrument à l'objet testé ou à un circuit de

commande externe, ou si vous devez toucher un circuit externe, coupez
l'alimentation du circuit et assurez-vous qu'aucune tension n'est fournie.

• Fusibles

Afin d'éviter tout risque d'incendie, utiliser un fusible de calibre

(courant, tension et type) spécifié pour l'instrument.

Ne pas court-circuiter le porte-fusible.

Précautions d’usage pour utiliser l’appareil en toute sécurité

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Содержание CA51 HANDY CAL

Страница 1: ...User s Manual Model CA51 CA71 HANDY CAL Calibrator IM CA71 E 13th Edition November 2021 YMI IM CA71 E Store this manual in an easily accessible place for quick reference...

Страница 2: ...operating methods and handling precautions Before using this product thoroughly read this manual to understand how to use it properly List of Manuals The following manuals including this one are provi...

Страница 3: ...m which you purchased the instrument The content of this manual may not be transcribed or reproduced in part or in whole without prior permission Trademark Acknowledgments All other company and produc...

Страница 4: ...d the product Main Unit Check the model specifications codes in the MODEL and SUFFIX fields of the nameplate at the back of the instrument to ensure that the instrument is exactly as specified in your...

Страница 5: ...r measurement RD031 Carrying case 93016 Terminal adapter 99021 AA size LR6 alkaline batteries four units User s manual IM CA71 E Optional Accessories The products listed below are available as optiona...

Страница 6: ...of AC adapter 94016 F VDE standard 94016 S BS stanndard Make sure that the attached power cord meets the designated standards of the country and area that you are using it in Optional Spare Parts Prod...

Страница 7: ...The following symbols are used on the instrument and in the User s Manual to ensure safe use Danger Handle with Care This symbol indicates that the operator must refer to an explanation in the User s...

Страница 8: ...ck the Physical Appearance Do not use the instrument if there is a problem with its physical appearance Use in gases Do not operate this instrument in areas where inflammable or explosive gases or vap...

Страница 9: ...tely Do Not Remove the Casing or Disassemble Only Yokogawa service personnel are authorized to remove the casing or disassemble or modify the instrument Do not attempt to repair the instrument yoursel...

Страница 10: ...y YOKOGAWA Additionally do not use the AC adapter and the power cord supplied with this instrument with another instrument Do not place anything on the AC adapter or power cord and prevent heat source...

Страница 11: ...cline toute responsabilit quant au non respect de ces exigences Symboles utilis s sur l instrument et dans ce manuel d instructions Danger Manipuler avec soin Ce symbole indique que l op rateur doit...

Страница 12: ...ique Ne pas utiliser l instrument si son aspect physique pr sente une anomalie Utilisation dans des gaz Ne pas faire fonctionner cet instrument dans des zones o des gaz ou vapeurs inflammables ou expl...

Страница 13: ...d utiliser ce c ble Ne pas retirer le bo tier ou d monter Seul le personnel de maintenance Yokogawa est autoris retirer le bo tier ou d monter ou modifier l instrument Ne pas tenter de r parer l inst...

Страница 14: ...r l adaptateur secteur et le cordon d alimentation fournis avec cet instrument avec un autre instrument Ne mettre aucun objet sur l adaptateur secteur ou le cordon d alimentation et viter que des sour...

Страница 15: ...Current Signal 4 4 4 2 2 4 20 mA Function 4 5 4 2 3 20 mA SINK Function 4 6 4 2 4 Using As 24 V Loop Power Supply 4 7 4 3 Sourcing Resistance or RTD Signal 4 8 4 4 Sourcing Thermocouple TC Signals 4...

Страница 16: ...for Measuring Number of Pulses 5 9 6 Memory Functions 6 1 6 1 Saving Data into Memory 6 2 6 1 1 Saving Data in the Order of Memory Numbers 6 2 6 1 2 Saving Data by Selecting Desired Memory Number 6 4...

Страница 17: ...ment Functions 10 7 10 3 1 Adjusting DC Voltage and DC Current Ranges 10 7 10 3 2 Adjusting AC Voltage and Resistance 400 Ranges 10 9 10 4 Notes on the Adjustment of Temperature Ranges CAL71 only 10 1...

Страница 18: ...t AC100V DC DC converter Measurement mode on off switch Power on off switch Output on off relay Batteries AC adapter MEASURE Mode Section SOURCE Mode Section MEASURE H L H L CPU Shunt resistor Multipl...

Страница 19: ...temperature detected by a type K E J T R B S N L or U thermocouple 1 RTD Sources resistance corresponding to the temperature detected by a Pt100 or JPt100 RTD 2 Frequency and pulse Sources a continuou...

Страница 20: ...es a resistance signal in the 400 range Thermocouple TC Measures temperature according to the type of thermocouple K E J T R B S N L or U 1 CA71 only RTD Measures temperature according to the type of...

Страница 21: ...1 4 IM CA71 E 1 Functions Power Supply The calibrator operates on AA size LR6 alkaline batteries or the optional AC adapter...

Страница 22: ...IM CA71 E 2 1 Names and Functions of Parts 1 2 3 4 5 6 7 8 9 10 11 12 13 App 2 Names and Functions of Parts 24 23 21 22 20 18 19 10 5 3 4 1 9 8 17 15 2 11 16 14 6 7 MEASURE 12 13 SOURCE...

Страница 23: ...options within the selected function If you have selected the 1 V 10 V or 100 V range use this key to toggle between the DC and AC options If you have selected the FREQ range use this key to select th...

Страница 24: ...e common to all of the source functions 12 Function Selector Switch Selects a source function and its range 13 RANGE Key Used to further select from range options within the selected function If you h...

Страница 25: ...4 20 mA function see Section 4 2 Sourcing DC Voltage DC Current or SINK Current Signal for further details Note that and keys are also used in the following ways The and keys labeled n and m serve as...

Страница 26: ...and DIP switch 24 I O Port Cover Open this cover to connect the RS232 communication cable P N 91017 CA71 only LCD Unit b f i j g h c d e a l k a Measured value b Setpoint for source c HOLD indicator...

Страница 27: ...s 88 mean the value of m j CAL mode selection indicator The 0 and FS indicators below this indicator denote zero point and full scale adjustments respectively k Battery replacement indicator Remaining...

Страница 28: ...purchased the instrument General Handling Precautions Before carrying around the instrument turn off power to the object under test and then the POWER key of the instrument If you are using an AC ada...

Страница 29: ...ill be required to take appropriate measures Environmental Requirements Use the instrument in locations that meet the following environmental requirements Ambient temperature and humidity Ambient temp...

Страница 30: ...rom being produced by using an antistatic mat or any other alternative means Condensation may occur if you relocate the instrument from places with low temperature and humidity to places with high tem...

Страница 31: ...be used for a prolonged period remove the batteries from the instrument French ATTENTION Pour viter tout risque de fuite de liquide ou d explosion des piles installer les piles avec leurs lectrodes po...

Страница 32: ...lkaline batteries in the battery holder with their positive and negative electrodes positioned correctly as indicated on the holder Step 4 After replacement reattach the battery holder cover tightly O...

Страница 33: ...ING Make sure that the rated power supply voltage of the instrument matches the voltage of the power supply before turning on the power To prevent the possibility electrical shock or fire be sure to u...

Страница 34: ...amais tirer sur le cordon Ne pas jeter mettre au rebut l adaptateur secteur au feu et ne pas l exposer la chaleur Ne pas l utiliser l endroit o le cordon est enroul pli Si le cordon d alimentation est...

Страница 35: ...AC power source Be sure to turn off the POWER switch when you finish using the instrument Turning On Off MEASURE Mode Pressing the key after power on turns off the MEASURE mode If the MEASURE mode is...

Страница 36: ...librator in dark places or when carrying out source or measurement Note that battery life shortens when the calibrator is operated on batteries NOTE The backlight automatically turns off approximately...

Страница 37: ...i se situe dans la cat gorie de mesure IV Measurement Category Description Remarks O None Other Other circuits that are not directly connected to MEAINS Circuits not connected to a mains power source...

Страница 38: ...de mesure With caps 1000V 10A CAT III 600V 10A CAT IV With no caps 1000V 10A CAT II Pollution Degree The pollution degree of the CA51 or CA71 in the operating environment is 2 Pollution Degree applie...

Страница 39: ...when drawing a load current since the voltage drop due to the resistance component approximately 0 1 on a round trip basis of the lead cables serves as an error French AVERTISSEMENT Pour viter tout ri...

Страница 40: ...be applied to the terminal thus causing damage to the terminal and resulting in the disability of generation French ATTENTION Serrer le bouton de la borne de sortie la main Ne pas utiliser d outil ou...

Страница 41: ...Step 2 Connect the two clips of the cables to the input of equipment under test while making sure the polarities are correct For 3 wire connection resistance or RTD signal Step 1 Connect the red lead...

Страница 42: ...key increases or decreases the digit Increasing the digit from 9 or decreasing it from 0 causes the digit to overflow or underflow allowing you to set the output value without interruption Holding do...

Страница 43: ...g the function selector switch select 4 20mA Step 2 Using each pair of and output setting keys which correspond to each digit of a value from 4 to 20 set the signal in a step by step manner You can se...

Страница 44: ...URE CA71 SOURCE 24 V DC AC or DC power supply 1 5 V output 4 20 mA Distributor H L mA H L Drawing SINK Current Step 1 Before connecting to the terminals select with the source range setting rotary swi...

Страница 45: ...mA current signal Using the supplied terminal adapter P N 99021 makes it easy to wire the calibrator for this application NOTE Since the function discussed above requires a significant amount of DC cu...

Страница 46: ...n is rated as 0 1 to 5 mA Note however that accuracy lowers for resistance measuring currents smaller than 0 5 mA For further details see Chapter 12 Specifications Any resistance signal being sourced...

Страница 47: ...PT100 options Step 3 Set the output value digit by digit using each pair of and keys Each press of the or key increases or decreases the digit Increasing the digit from 9 or decreasing it from 0 cause...

Страница 48: ...oise resulting in less effect on the CA71 This caution also applies to the CA51 French ATTENTION Lors de la source de signaux de thermocouple le CA71 met une petite tension CC Si l appareil en cours d...

Страница 49: ...lowing you to set the output value without interruption Holding down the or key continuously changes the digit in question Pressing the key initializes the output setpoint to the default value 600 C f...

Страница 50: ...meter under verification Because the thermoelectromotive force generated using this method does not match that generated using an external RJ sensor the accuracy of this measurement is not guaranteed...

Страница 51: ...ys Each pair of and keys corresponds to each digit of the LCD reading Each press of the or key increases or decreases the digit Increasing the digit from 9 or decreasing it from 0 causes the digit to...

Страница 52: ...ng of the key cycles through the 500 0 Hz 1000 Hz and 10 kHz options Step 3 Set the output value digit by digit using each pair of and output setting keys Each pair of and keys corresponds to each dig...

Страница 53: ...n Pressing the key initializes the output setpoint to the default value 0 1 V Step 6 Press the key once again to show on the LCD Then press the key one more time to revert to frequency setting mode St...

Страница 54: ...without interruption Holding down the or key continuously changes the digit in question Pressing the key initializes the output setpoint to the default value differs depending on the frequency range S...

Страница 55: ...Holding down the or key continuously changes the digit in question Pressing the key initializes the output setpoint to the default thus reverting to the mode of sourcing continuous pulse trains Step...

Страница 56: ...tions Step 3 Set the output value digit by digit using each pair of and output setting keys Each pair of and keys corresponds to each digit of the LCD reading Each press of the or key increases or dec...

Страница 57: ...quency Step 8 To turn off the output press the key once again The appears on the LCD and the output terminals are open circuited NOTE The contact has polarities Always connect the positive side to the...

Страница 58: ...low with the calibrator output turned off Step 1 When the setting of the sourced signal level of each range is complete follow step 2 and later steps Step 2 Using each pair of or keys set the main set...

Страница 59: ...uited Step 8 Pressing the key one more time cancels the divided output n m mode TIP To change the main setpoint temporarily cancel the divided output n m mode Set the main setpoint once again Then pla...

Страница 60: ...ure The monitored value does not reflect the correction made by the RJ sensor Pressing the key once again changes to the temperature detected by the RJ sensor connected to the calibrator or the intern...

Страница 61: ...s fournis pour la mesure la tension maximale admissible entre les bornes d entr e et la terre est de 300 V Pour viter toute lectrocution ne PAS utiliser l talonneur une tension d passant ce maximum La...

Страница 62: ...o clips of the cables to the measuring terminals of equipment under test while making sure the polarities are correct For thermocouple signal CA71 only Step 1 Connect the terminal adapter P N 99021 to...

Страница 63: ...test cut off the power to the device Do not apply any voltage or current exceeding the allowable voltage 300 V or current 120 mA Otherwise there will be a danger of not only damage to the instrument b...

Страница 64: ...on H avec la borne d entr e de courant mA et vice versa lors de la r alisation du c blage est extr mement dangereux Ne JAMAIS faire cette erreur Les bornes d entr e de courant sont quip es d un fusibl...

Страница 65: ...nt task there will be a danger of not only damage to the instrument but also personal injury due to electrical shock Exercise the utmost care when carrying out the measurement task French ATTENTION Si...

Страница 66: ...value shown on the LCD is repositioned Replacing the Fuse The current input protection fuse in the mA 3WIRE terminal is housed inside the fuse holder labeled FUSE on one side panel of the calibrator...

Страница 67: ...ycles through the 400 Pt100 and JPt100 options TIP If you select the 400 RTD range of the SOURCE mode at the same time the RTD selected on the SOURCE mode side precedes the one selected on the MEASURE...

Страница 68: ...00 mV TC range of the SOURCE mode at the same time the thermocouple selected on the SOURCE mode side precedes the one selected on the MEASURE mode side Thus you cannot select any thermocouple for the...

Страница 69: ...ignal is present LCD Reading 100 Hz 1000 Hz 10 kHz Range 5 5 2 Operating the Calibrator for Measuring Number of Pulses The CPM option in this measurement counts pulses per minute while the CPH option...

Страница 70: ...brator stops counting at that moment The LCD shows the number of pulses counted up to the moment If the count exceeds the limit the calibrator shows the maximum number and stops counting TIP To measur...

Страница 71: ...y MEM READ You can show data in memory on the LCD When data is being read from memory the source output remains turned off Thus you cannot do any source task using data stored in memory 3 Clearing Mem...

Страница 72: ...ber address Executing the MEM SAVE function cancels the state of selecting memory reverting to normal setting mode Step 3 To save the next data item into the area with the next memory number press the...

Страница 73: ...s Press the key Data is saved into the area with memory number 14 and the memory mode is cancelled Data is saved into the area with memory number 21 and the memory mode is cancelled All these are not...

Страница 74: ...the area with the selected memory number address TIP To cancel the memory mode saving reading press the key one more time Executing the MEM SAVE function automatically cancels the memory mode 6 1 3 Ov...

Страница 75: ...st recently used to save data Memory is ready for data saving Step 2 Pressing the key causes the on screen READ indication to blink indicating the calibrator is reading from memory Step 3 Using the pa...

Страница 76: ...ta you want to clear Step 3 Pressing the key causes the LCD to show the alarm indication no 88 indicates object MEM No Step 4 Pressing the key once again clears the data with the selected memory numbe...

Страница 77: ...for at least five seconds The LCD shows the alarm indication Step 3 Pressing the key once again clears all of the data in memory ALL CLEAr alarm indication TIP To cancel clearing the data after the a...

Страница 78: ...er la configuration du commutateur DIP DIP Switch Position Description Factory Setting OFF left side ON right side 1 Sweep Selects the sweep or auto step function 2 Speed Changes the speed setpoint of...

Страница 79: ...is pressed at midpoints during a change in the output Sweep Mode Operation Step 1 Press the key to turn off the calibrator Step 2 Place switch 1 Sweep switch in the ON right side position Step 3 By se...

Страница 80: ...tput value to begin decreasing The output value decreases down to the lower limit in the same amount of time it took to increase up to the upper limit When the output reaches the lower limit the calib...

Страница 81: ...n off the calibrator Step 2 Place switch 1 Sweep switch in the ON right side position Step 3 By setting the position of switch 2 Speed switch set the time of one step OFF left side 2 5 sec step ON rig...

Страница 82: ...ssuming the starting value of the variable n is 1 the output cyclically changes with the variable n as n changes in the following manner n 1 2 3 m 1 m m 1 2 1 2 3 Step 10 To quit the auto step functio...

Страница 83: ...emperature of the thermometer under verification is measured using an external RJ sensor and this temperature is used as the reference junction temperature Step 1 Press the key to turn off the calibra...

Страница 84: ...le or RTD the LCD shows IPTS 68 7 5 Switch Not Used Although switch 5 No Use switch of the DIP has no effect on calibrator operation the switch should be placed in the OFF left side position 7 6 Temp...

Страница 85: ...ith the optional communication cable P N 91017 you can use the RS232 serial port 9 pin D sub of a personal computer or any other equipment In talk only or printer mode you can output the source setpoi...

Страница 86: ...to 3600 TIP To close the communication setting screen press the key once again while simultaneously holding down the key Even if you turn off the calibrator the communication mode and interval you ha...

Страница 87: ...E mode is disabled if you select or 8 4 Data Format Data is output from the calibrator in the following format Source Function 1V Range DC V Data 1 0000 Measure Function 100 mV Range k Data 25 5C 8 5...

Страница 88: ...SD Sets sourced setpoint queries the current setting SF Queries the source function SO On Off of source output queries the current setting SR Sets the sourcing range queries the current setting SY Sw...

Страница 89: ...t digit H Syntax for setting Hm delimiter Syntax for query H delimiter Response Hm delimiter For details on the header see the OD command Description of parameter m Enables Disables the header m 0 Dis...

Страница 90: ...f condition m 0 Off m 1 On MR Syntax for setting MRm delimiter Syntax for query MR delimiter Response MRm delimiter Description of parameter m Measuring range 100V m 0 DC m 1 AC 10V m 0 DC m 1 AC 1V m...

Страница 91: ...d command not used in this instrument m 12 Specified parameter value is outside allowed range m 13 Attempt made to execute a command that is not permitted in a certain status of the instrument m 16 An...

Страница 92: ...delimiter Syntax for query SO delimiter Response SOm delimiter Description of parameter m Condition of generation source m 0 Off m 1 On SR Syntax for setting SRm delimiter Syntax for query SR delimit...

Страница 93: ...limiter Description of parameter m Adjustment item m 3 Adjustment of source m 4 Adjustment of measurement CP Sets the adjustment point Syntax for setting CPm delimiter Description of parameter m Adjus...

Страница 94: ...a When normal condition Syntax for query OMm delimiter Response abcde fghij fghij Header section of measured value a V Voltage A Current O Resistance T Temperature F Frequency b DC Direct current AC A...

Страница 95: ...n value 2 digits among numbers from 00 to 19 where n m m m value 2 digits among numbers from 01 to 19 where n m TE Sets the temperature monitor display for sourced TC RTD range queries the current set...

Страница 96: ...SURE OFF key for turning on off the MEASURE mode is set to OFF The SOURCE indicator remains set to OFF even if the SOURCE ON key is operated for signal source When in voltage signal source check if th...

Страница 97: ...shooting and Calibration Calibration We recommend that you calibrate the instrument once a year to maintain its accuracy high accuracy For a service of calibration contact the dealer from which you pu...

Страница 98: ...equal to or higher than those shown in the following table for the ranges shown in the table Source Functions Function to Be Adjusted Standard s Name Range to Be Adjusted Measuring Range Accuracy Rema...

Страница 99: ...uirements Ambient temperature 23 1 C Relative humidity 45 to 75 Warm up Before use warm up the calibration standard for the period of time specified for the standard Auxiliary digit indicator The valu...

Страница 100: ...ndard output values of the CA51 71 match the adjustment points listed above TIP You can also select only the range in need of readjustment to adjust it separately Always make zero point 0 adjustments...

Страница 101: ...adjustment setpoint in Table 10 1 Step 6 Press the key to confirm the CAL 0 adjustment setpoint The CAL indicator on the LCD changes to setting the calibrator ready for full scale adjustment Step 7 U...

Страница 102: ...stance of 0 00 make sure the voltage between the H and L terminals is within 20 V If the voltage is beyond the limits internal adjustments must be made Contact the vender from which you purchased the...

Страница 103: ...ssite deux types de courant de mesure de r sistance 1 mA et 5 mA partir d un dispositif externe R glez la plage s par ment pour chacun de ces courants R glage pour 1 mA Ce r glage est possible avec la...

Страница 104: ...ly the reference input signals listed above from the calibration standard TIP You can also select only the range in need of readjustment to adjust it separately Always make zero point 0 adjustments to...

Страница 105: ...ied as described above Therefore you need not make any range adjustment with and keys Saving the adjustment setpoint results in the overwriting of existing data Be extremely careful since the previous...

Страница 106: ...tep 6 Apply the CAL FS adjustment setpoint input of each range in Table 10 2 from the calibration standard to the H and L input terminals of the calibrator Step 7 Pressing the key confirms the CAL FS...

Страница 107: ...AL71 only Adjusting the temperature measuring ranges of the thermocouple function involves using special equipment to make reference junction compensation adjustments For this reason contact the vende...

Страница 108: ...ad cables for source 98020 Black Black Black Black Red Red Red RJ sensor B9108WA Fuse A1635EF RS232 communication cable 91017 for CA71 only AC adapter Lead cables for measurement RD031 Terminal adapte...

Страница 109: ...put 10 mA 1 Maximum load 12 V External power supply 5 to 28 V Excitation current 0 5 to 5 mA 3 If 0 1 mA add 0 25 or 0 6 C Subject device input capacitance 0 1 F or less TC source accuracy does not in...

Страница 110: ...ntact input Maximum 100 Hz Notes CPM Counts per minute CPH Counts per hour Remarks Input resistance 10 M or greater Input resistance Approx 1 M Input resistance Approx 25 Accuracy during 3 wire measur...

Страница 111: ...al 100 VDC 300 VAC Current terminal 120 mA DC Current terminal input protection Fuses 100 mA 400 V Measuring unit ground voltage Maximum 300 V AC Measurement display updating rate Approximately once p...

Страница 112: ...black RD031 Carrying case 93016 Terminal adapter for CA71 99021 User s manual IM CA71 E AA size LR6 alkaline batteries four units Optional accessories sold separately AC adapter 94012 100 V AC power s...

Страница 113: ...Use the communication cable 91017 This product is classified as Class A for use in industrial environments Operation of this product in a residential area may cause radio interference in which case t...

Страница 114: ...12 6 IM CA71 E 12 Specifications External Dimensions Note This figure shows the CA71 but there is no difference in exterior from the CA51 193 Unit mm 120 54 5 51 113 8...

Страница 115: ...ctively EEA European Economic Area 13 2 Batteries and Waste Batteries EU Battery Directive Regulation valid only in the EEA and UK Battery Regulation in the UK Batteries are included in this product W...

Страница 116: ...ration for this Product in the EEA To contact Yokogawa Europe B V see the separate list of worldwide contacts PIM 113 01Z2 13 4 Disposal When disposing of this instrument follow the laws and ordinance...

Страница 117: ...ution Control of Electronic and Electrical Products of the People s Republic of China 13 5 For the Pollution Control of Electronic and Electrical Products of the People s Republic of China This manual...

Страница 118: ...n compensation means measuring detecting the temperature of the reference junction calculating the temperature difference difference of thermoelectromotive force from 0 C and then carrying out compens...

Страница 119: ...L Cold junction compensator Using a cold junction compensator Device under calibration thermometer Lead cables Thermo couple 0 C Using a bult in RJ Sensor When a built in RJ sensor is used a differen...

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