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App1-2

IM CA71-E

■ Using a Cold Junction Compensator

A cold junction compensator can be used when, for example,

it is not possible to use an RJ sensor. The use of a cold junction

compensator enables the reference junction to be 0°C.

Cold junction compensator: Yokogawa T-MJ or the equivalent

H L

SOURCE

CA71

Cold junction compensator

Device under calibration

(thermometer)

Lead cables

Thermo-

couple

°C

■ Using a bult-in RJ Sensor

When a built-in RJ sensor is used, a difference in temperature may

exist between the terminal of the calibrator and the thermometer.

H L

SOURCE

CA71

Lead cables

Device under verification

(thermometer)

Built-in RJ sensor

A difference
in temperature
may exist between
terminals.

Appendix 1 Reference Junction Compensation

Содержание CA71 HANDY CAL

Страница 1: ...User s Manual Model CA51 CA71 HANDY CAL Calibrator IM CA71 E 9th Edition Oct 2017 YMI IM CA71 E Store this manual in an easily accessible place for quick reference...

Страница 2: ...and CA71 as well as the 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 incl...

Страница 3: ...ny questions however please contact the vender from which you purchased the instrument The content of this manual may not be transcribed or reproduced in part or in whole without prior permission Trad...

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: ...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 optional accessories If you purchased som...

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: ...sed 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 Manual in order to avoid th...

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: ...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 yourself as doing s...

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: ...A Function 4 4 4 2 3 20 mA SINK Function 4 5 4 2 4 Using As 24 V Loop Power Supply 4 6 4 3 Sourcing Resistance or RTD Signal 4 7 4 4 Sourcing Thermocouple TC Signals 4 9 4 4 1 When RJ Sensor Is Used M...

Страница 12: ...uring Number of Pulses 5 8 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 6 1 3 Ov...

Страница 13: ...sting Measurement Functions 10 6 10 3 1Adjusting DC Voltage and DC Current Ranges 10 6 10 3 2Adjusting AC Voltage and Resistance 400 Ranges 10 8 10 4 Notes on the Adjustment of Temperature Ranges CAL7...

Страница 14: ...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 15: ...ive force corresponding to the 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 Frequenc...

Страница 16: ...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 17: ...1 4 IM CA71 E 1 Functions Power Supply The calibrator operates on AA size LR6 alkaline batteries or the optional AC adapter...

Страница 18: ...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 23 24 21 18 19 10 12 13 22 20 6 7 5 3 4 1 9 8 17 15 2 11 16 14 MEASURE SOURCE...

Страница 19: ...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 20: ...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 21: ...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 22: ...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 23: ...ificant two digits 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 in...

Страница 24: ...nect the plug from the wall outlet Also cut off power to the object under test that is connected to the input terminals Then contact the vendor from which you purchased the instrument General Handling...

Страница 25: ...cover of the battery holder opened Environmental Requirements Use the instrument in locations that meet the following environmental requirements Ambient temperature and humidity Ambient temperature r...

Страница 26: ...th low temperature and humidity to places with high temperature and humidity or if the instrument experiences any sudden temperature change In that case leave the instrument under the given ambient te...

Страница 27: ...egative electrodes positioned correctly as indicated on the holder Step 4 After replacement reattach the battery holder cover Indication of Battery Level Remaining Battery Power Indicator The battery...

Страница 28: ...URCE mode is set to the 20 mA 10 V output Connecting the AC Adapter WARNING Make sure that the rated power supply voltage of the instrument matches the voltage of the power supply before turning on th...

Страница 29: ...calibrator Pressing the key once again turns off the calibrator NOTE Before disconnecting the AC adapter from an AC power source turn off the calibrator by pressing the key When operating the calibrat...

Страница 30: ...ment when the MEASURE mode is off press the key once again TIP One to two seconds are taken for the LCD to turn on after the MEASURE mode is turned on Turning On Off the Backlight The LCD can be back...

Страница 31: ...category III Measurement Category Description Remarks O None Other Other circuits that are not directly connected to MEAINS Circuits not connected to a mains power source CAT II For measurement prefor...

Страница 32: ...1 or CA71 in the operating environment is 2 Pollution Degree applies to the degree of adhesion of a solid liquid or gas which deteriorates withstand voltage or surface resistivity Pollution Degree 2 a...

Страница 33: ...locations with a voltage to ground below 30 V CAUTION Do not apply any voltage to the output terminals for ranges other than 20 mA SINK Otherwise the internal circuitry may be damaged The instrument h...

Страница 34: ...ing in the disability of generation Lead cables for source 98020 Black Black Red For DC voltage DC current thermocouple or pulse output Step 1 Connect the red lead cable for source P N 98020 to the H...

Страница 35: ...corresponds to each digit of the LCD reading Each press of the and key increases or decreases the digit Increasing the digit from 9 or decreasing it from 0 causes the digit to overflow or underflow al...

Страница 36: ...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 set the signal in 4 mA increments or decrements in the order 4 8 12 16 18 20 mA Use...

Страница 37: ...ng the calibrator as indicated by the dashed lines in the following figure MEASURE CA71 SOURCE 24V DC AC or DC power supply 1 5 V output 4 20 mA Distributor H L mA H L Drawing SINK Current Step 1 Befo...

Страница 38: ...ing 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 current 22 mA operatio...

Страница 39: ...vice under calibration 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...

Страница 40: ...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 causes the digit to overflow...

Страница 41: ...the CA71 output Taking measures such as connecting the device to ground can reduce its noise resulting in less effect on the CA71 This caution also applies to the CA51 Step 1 Insert the RJ sensor into...

Страница 42: ...output setpoint to the default value 600 C for a type B thermocouple Step 6 Pressing the key causes the indicator on the LCD to change from to A thermoelectromotive force based on the temperature dete...

Страница 43: ...eading on the thermometer under verification Because the thermoelectromotive force generated using this method does not match that generated using an external RJ sensor the accuracy of this measuremen...

Страница 44: ...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 overflow or underflow all...

Страница 45: ...ency range Pressing 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 corres...

Страница 46: ...itializes 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 Step 7 Pressing the key...

Страница 47: ...digit in question Pressing the key initializes the output setpoint to the default value differs depending on the frequency range Step 4 Pressing the key once switches to amplitude setting mode The LCD...

Страница 48: ...setpoint to the default thus reverting to the mode of sourcing continuous pulse trains Step 8 Pressing the key causes the indicator on the LCD to change from to The calibrator sources the preset numb...

Страница 49: ...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 digit of the LCD reading Each press of the or key...

Страница 50: ...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 H output terminal of...

Страница 51: ...ow the steps shown below 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...

Страница 52: ...g 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 place the calibrator in...

Страница 53: ...o the preset temperature 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 cal...

Страница 54: ...en the supplied terminal adapter is attached to the input terminals is 30 Vpeak maximum To avoid electrical shock do not use the terminal adapter for measuring any circuit voltage exceeding the maximu...

Страница 55: ...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 56: ...quipped with a built in current input protection fuse Overcurrent input to the terminals will cause the fuse to blow If the fuse is blown replace it with one P N A1635EF with the specified ratings For...

Страница 57: ...g or in the operating procedure in this measurement 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 carr...

Страница 58: ...point of the measured 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 pan...

Страница 59: ...t100 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 mode side Thus you can...

Страница 60: ...f you select the 100 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 the...

Страница 61: ...ading 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 counts pulses per hour...

Страница 62: ...e hour expires the calibrator 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...

Страница 63: ...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 64: ...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 key...

Страница 65: ...imes 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 n...

Страница 66: ...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 Overw...

Страница 67: ...most recently used to save data Memory is ready for data saving Step 2 Pressing the key causes the on screen indication to blink indicating the calibrator is reading from memory Step 3 Using the pair...

Страница 68: ...ta you want to clear Step 3 Pressing the key causes the LCD to show the alarm indication no 88 indicates object Step 4 Pressing the key once again clears the data with the selected memory number TIP T...

Страница 69: ...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 alarm...

Страница 70: ...h 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 the sweep or auto step function 3 INT RJ Select...

Страница 71: ...ey 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...

Страница 72: ...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 73: ...y to turn 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 ste...

Страница 74: ...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 75: ...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 76: ...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 77: ...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 78: ...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 79: ...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 80: ...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 81: ...sourced setpoint by one digit When normal condition Syntax for setting UPm delimiter Description of parameter m Specifies a digit 1 the lowest digit to 5 the highest digit H Enables Disables the outp...

Страница 82: ...Description of parameter m On Off condition m 0 Off m 1 On MR Sets the measuring range queries the current setting Syntax for setting MRm delimiter Syntax for query MR delimiter Response MRm delimite...

Страница 83: ...mation m 00 No error m 11 Received 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...

Страница 84: ...t queries the current setting When normal condition adjustment Syntax for setting SOm delimiter Syntax for query SO delimiter Response SOm delimiter Description of parameter m Condition of generation...

Страница 85: ...urced setpoint 8 digits ex 1 00003 CL Sets the adjustment item queries the current setting When adjustment Syntax for setting CLm delimiter Syntax for query CL delimiter Response CLm delimiter Descrip...

Страница 86: ...a When normal condition Syntax for query OMm delimiter Response abcde fghij fghij delimiter Header section of measured value a V Voltage A Current O Resistance T Temperature F Frequency b DC Direct cu...

Страница 87: ...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 setting TC RTD mode only When normal condition...

Страница 88: ...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 the load current is beyond...

Страница 89: ...the following table and accuracy levels equal to or higher than those shown in the table Source Functions Function to Be Adjusted Standard s Name Range to Be Adjusted Measuring Range Accuracy Remarks...

Страница 90: ...equirements 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 va...

Страница 91: ...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 92: ...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 93: ...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 94: ...sted 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 together with full scale FS adjustm...

Страница 95: ...with reference to the input applied 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 ext...

Страница 96: ...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 adjustment setpoint At this point...

Страница 97: ...tes on the Adjustment of Temperature Ranges CAL71 only Adjusting the temperature measuring ranges of the thermocouple function involves using special equipment to make reference junction compensation...

Страница 98: ...er make sure the adapter is positioned in the correct orientation Lead cables for source 98020 Black Black Black Black Red Red Red RJ sensor B9108WA Fuse A1635EF RS232 communication cable 91017 for CA...

Страница 99: ...mum output 10 mA Maximum output 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...

Страница 100: ...Maximum 100 Hz Notes CPM Counts per minute CPH Counts per hour Input frequency 45 to 65 Hz Input voltage range 10 to 100 Measurement method Average value rectification Accuracy of reading V mV A or dg...

Страница 101: ...C 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 per second Serial...

Страница 102: ...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 103: ...ustralia and New Zealand EN 55011 Class B Group1 Korea Electromagnetic Conformity Standard Measurement error may temporarily occur under immunity environment Conditions of EMC Use AC adapter 94016 for...

Страница 104: ...12 6 IM CA71 E 12 Specifications 54 5 2 15 Unit mm approx inches 51 2 01 113 8 4 49 120 4 73 193 7 61 Note This figure shows the CA71 but there is no difference in exterior from the CA51...

Страница 105: ...posing products in the EU contact your local Yokogawa Europe B V office Do not dispose in domestic household waste 13 2 How to Replace and Dispose the Batteries EU Battery Directive This directive is...

Страница 106: ...ized Representative in the EEA Yokogawa Europe B V is the Authorized Representative of Yokogawa Test Measurement Corporation for this Product in the EEA EEA European Economic Area To contact Yokogawa...

Страница 107: ...ol of Electronic and Electrical Products of the People s Republic of China 13 4 For the Pollution Control of Electronic and Electrical Products of the People s Republic of China This manual is valid o...

Страница 108: ...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 109: ...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...

Страница 110: ......

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