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Hioki CT6710, Instruction Manual

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58

Measuring Currents

To measure a low current

When measuring 

low DC or low-frequency low AC, you can 

increase the current-detection sensitivity of the device in the 

following way.

How to measure a low current

1

 

Coil a single conductor to be measured into 

several loops with a diameter of 200 mm or 

more.

2

 

Clamp the sensor around the loops in a bundle.

This will make the conductor pass through the sensor 

aperture one time more than the loop count consecutively 

in one direction.

3

 

Arrange the loops radially as shown on the 

following page.

4

 

Measure the current.

HIOKI CT6710A961-01

Summary of Contents for CT6710

Page 1: ...T6711 CURRENT PROBE CT6710 Instruction Manual Aug 2020 Revised edition 1 CT6710A961 01 20 08H CT6711 CURRENT PROBE CT6710 Instruction Manual Aug 2020 Revised edition 1 CT6710A961 01 20 08H HIOKI CT6710A961 01 ...

Page 2: ...HIOKI CT6710A961 01 ...

Page 3: ...f use Inspecting the Device Before Use p 26 Preparing for Measurement p 28 Provide power to the device Connect the termination unit to your waveform measuring instrument Execute demagnetization and automatic zero adjustment Measuring Currents p 41 Clamp the sensor around a conductor to be measured Measure a current Finishing Measurement p 65 CT6710A961 01 HIOKI CT6710A961 01 ...

Page 4: ...Connection Example Waveform measuring instrument Model 3269 Power Supply H L Power source Load See Example of connection to the circuit to be measured p 49 HIOKI CT6710A961 01 ...

Page 5: ...cations of Lighting Up Blinking LEDs 22 2 Current Measurement 25 2 1 Inspecting the Device Before Use 26 2 2 Preparing for Measurement 28 Providing power to the CT6710 CT6711 29 Executing demagnetization and automatic zero adjustment 33 2 3 Measuring Currents 41 How to measure a current 50 To measure a low current 58 To measure a current accurately 60 When the device has entered protection mode 62...

Page 6: ...s of Functionality 75 3 4 Typical Characteristics 77 Frequency characteristics 77 Frequency derating curve 78 Input impedance 80 Consumption current 81 Influence of common mode voltage 82 4 Maintenance and Service 83 4 1 Troubleshooting 84 Before sending back your device for repair 85 4 2 Errors 88 Types of errors 89 4 3 Cleaning 96 4 4 Disposal 97 Index 99 Warranty HIOKI CT6710A961 01 ...

Page 7: ...s Refer to manuals relevant to your purpose Current Sensor Operating Precautions Information on the device for safe operation Instruction Manual this document Basic instructions and specifications of the device Please review the separate Current Sensor Operating Precautions before using the device Target audience This manual has been written for use by individuals who use the product in question o...

Page 8: ...ates a potentially hazardous situation that if not avoided could result in minor or moderate injury NOTICE Indicates potential risks of damage to the supported product or to other property IMPORTANT Indicates information or content that is particularly important from the standpoint of operating or maintaining the device NOTE Indicates useful advice concerning device performance and operation Indic...

Page 9: ...ning messages listed at the beginning of operating instructions and the accompanying document entitled Current Sensor Operating Precautions Indicates that the device can only be used at a location on an insulated wire with sufficient insulation for the circuit voltage Symbols for various standards Indicates the Waste Electrical and Electronic Equipment Directive WEEE Directive in EU member states ...

Page 10: ... control keys Accuracy Hioki defines tolerances for measured values in terms of percentage of reading as indicated below rdg Reading Displayed value Indicates the value the measuring instrument displays Tolerances for reading errors are expressed in percent of reading of reading rdg HIOKI CT6710A961 01 ...

Page 11: ...he device does not perform as indicated in its specifications please contact your authorized Hioki distributor or reseller Check that the package contents are correct The carrying case contains the current probe Instruction Manual and Current Sensor Operating Precautions Carrying case Accessory Model CT6710 CT6711 Current Probe Instruction Manual Accessory Current Sensor Operating Precautions 0990...

Page 12: ...r the latest information Model 3269 Power Supply The 3269 Power Supply can provide the power to up to two probes of the CT6710 CT6711 The 3272 Power Supply cannot be used as a power supplying unit for the CT6710 CT6711 Precautions for transportation Store packaging materials for future use You will need the packaging materials when shipping the device Transport the device in its carrying case HIOK...

Page 13: ...iew the safety information below before using the device DANGER Read this manual carefully and ensure you understand its contents before using the device Improper use of the device could result in serious bodily injury or damage to the device WARNING If using an electrical measuring instrument for the first time seek instruction from an individual with electrical measurement experience first Failu...

Page 14: ...evice should conform not only to its specifications but also to the specifications of all accessories options and other equipment in use DANGER Do not use the device for measuring bare conductors Take measurements at a location on an insulated wire with sufficient insulation for the circuit voltage Doing so may result in electric shock or a short circuit HIOKI CT6710A961 01 ...

Page 15: ...the device and facilities resulting in serious bodily injury Even if a short circuit occurs on the secondary side of the distribution panel the panel will interrupt the short circuit current Do not use the device in powerful magnetic fields Doing so could cause the sensor to become abnormally hot resulting in bodily injury damage to the device or fire Follow all operating precautions for a wavefor...

Page 16: ... or explosive gases In locations where it would be exposed to water oil chemicals or solvents In locations where it would be exposed to high humidity or condensation In locations where it would be exposed to powerful electromagnetic radiation Close to objects carrying an electric charge In locations with an excessive amount of dust Close to inductive heating devices high frequency inductive heatin...

Page 17: ... distributor or reseller for repair CAUTION Do not place the device on an unstable stand or angled surface Doing so could cause the device to fall or overturn resulting in bodily injury or damage to the device Properly connect the device to a circuit to be measured and your waveform measuring instrument Improperly connecting them could cause electric shock or damage to the circuit device or your i...

Page 18: ...gure below while the upper jaw is locked in place Opening lever position when the upper jaw is locked in place Do not apply force Doing so may damage the retracting extending mechanism Keep the upper jaw locked in place when the device is not in use Leaving the upper jaw unlocked will cause dust or dirt to settle on the facing core surfaces resulting in damage to the device HIOKI CT6710A961 01 ...

Page 19: ...ree current ranges to detect current waveforms from 1 mA to 50 A You can directly connect the termination unit to a BNC input terminal of your waveform measuring instrument such as an oscilloscope and recorder and then clamp the sensor around a conductor to be measured to observe current waveforms easily Sensor p 20 Termination unit p 16 Junction box p 18 HIOKI CT6710A961 01 ...

Page 20: ...This feature lets you easily retract extend and lock the upper jaw in place to clamp the sensor around a conductor to be measured Easy to connect output terminal p 17 p 38 Insert the output terminal into a BNC input terminal on your waveform measuring instrument to connect the termination unit Warning LED lights p 18 The warning LEDs alert you to an overload indicating that an input current value ...

Page 21: ...o 50 A Broad frequency band p 71 Model CT6710 DC to 50 MHz Model CT6711 DC to 120 MHz Demagnetizing and automatic zero adjustment functions p 33 You can use a single key to demagnetize the magnetic cores and correct variations in offset voltage both of which are required before measuring Protection mode p 62 The device automatically enters protection mode to prevent damaging itself when overheatin...

Page 22: ...16 Name and Function of Each Part 1 3 Name and Function of Each Part Termination unit 1 2 6 3 4 5 Top view See p 34 and p 35 HIOKI CT6710A961 01 ...

Page 23: ...as the vents on the sides and bottom Do not clog them 4 Serial number The serial number consists of nine digits The first two digits indicate the year of manufacture while the second two digits indicate the month of manufacture Do not remove this sticker as the number is important 5 Power plug Power is provided to the CT6710 CT6711 through this plug Connect this plug with the 3269 Power Supply 6 S...

Page 24: ...atic zero adjustment p 33 Press momentarily less than 0 5 s Performs automatic zero adjustment alone p 40 2 Higher range key p 53 Switch over to a next higher current range Does not switch from the 30 A range to the 0 5 A range 3 Lower range key p 53 Switch over to a next lower current range Does not switch from the 0 5 A range to the 30 A range HIOKI CT6710A961 01 ...

Page 25: ...ks when the device has entered protection mode p 62 or a checksum error has occurred p 95 7 DEMAG AUTO ZERO LED orange light Slowly blinks when demagnetization or automatic zero adjustment has not yet been performed p 33 Lights up when demagnetization and automatic zero adjustment are in execution p 39 Goes out when demagnetization and automatic zero adjustment have been completed p 39 Flashes thr...

Page 26: ... locations subject to abrupt temperature changes Do not apply force or mechanical shock to the device Do not subject the device to static electricity Doing so could damage the device 4 4 5 6 Top view When the upper jaw is unlocked See p 41 See p 41 See p 41 3 2 1 HIOKI CT6710A961 01 ...

Page 27: ...nsor heads located inside the jaws detects currents 4 Current direction indicator Clamp the sensor around the conductor such that the direction this arrow indicates matches the current direction of a conductor to be measured 5 JAW UNLOCKED indicator If this indicator appears the upper jaw is not locked in place 6 Opening lever To retract and extend the upper jaw always operate this lever This leve...

Page 28: ...ompleted Exceeds prescribed level Upper jaw unlocked 10 Not performed Not detected Upper jaw unlocked 11 Not performed Exceeds prescribed level Upper jaw unlocked 12 1 1 13 Excess heat detected in junction box 2 14 ROM checksum error at power on CPU failure Rapidly 1 When the DEMAG AUTO ZERO key is pressed under any one of the following conditions p 91 The upper jaw is unlocked An overload has bee...

Page 29: ...11 Rapidly flashes 3 times Rapidly flashes 3 times Rapidly flashes 3 times Specified range only 12 Rapidly Rapidly Rapidly Rapidly 13 Rapidly Rapidly Rapidly Rapidly 14 3 Blinks at 250 ms intervals duty ratio 50 4 After the device is turned on and then all LEDs light up for 1 second the DEMAG AUTO ZERO LED blinks which indicates that demagnetization or automatic zero adjustment has not yet been pe...

Page 30: ...24 Specifications of Lighting Up Blinking LEDs HIOKI CT6710A961 01 ...

Page 31: ...internal overheating of the junction box resulting in bodily injury fire or damage to the device IMPORTANT Do not drop the device Do not subject the device to an impact Do not place any foreign object between the facing core surfaces of the sensor heads Do not scratch the facing core surfaces between the sensor heads Do not touch the facing core surfaces Do not insert any foreign object into the g...

Page 32: ...option Waveform measuring instrument such as oscilloscope and recorder Connecting the CT6710 CT6711 to a Hioki Memory HiCorder with a power supply module for current probes option installed allows the CT6710 CT6711 to operate without the 3269 Power Supply For more information contact your authorized Hioki distributor or reseller IMPORTANT Use a waveform measuring instrument such as oscilloscope an...

Page 33: ...No Is the insulation of each cord damaged Yes Z Z Have the device repaired Damage can cause electric shock No Provide power to the device p 29 Do the seven LEDs light up for about one second after the device is turned on Off or blinking Z Z Have the device repaired The device is damaged Yes Is the insulation of each conductor to be measured damaged Yes Do not clamp the sensor around any damaged co...

Page 34: ... of the 3269 Power Supply verify that the supply voltage you plan to use falls within the supply voltage range noted on the 3269 Supplying a voltage that falls outside the specified range to the 3269 could damage the CT6710 CT6711 or the 3269 causing bodily injury NOTICE Always operate the opening lever to retract extend and lock the upper jaw If you retract extend or lock the upper jaw directly b...

Page 35: ...of the CT6710 CT6711 depends on current under measurement One unit of the 3269 can simultaneously provide power to up to two current probes the CT6710 CT6711 each of which measures a current with the maximum rated current value For information about the consumption current see Consumption current p 81 in Typical Characteristics The 3272 Power Supply which does not have sufficient current capacity ...

Page 36: ...o the power inlet on the back of the 3269 Power Supply 3 Slide the opening lever of the sensor toward the lower jaw until the JAW UNLOCKED indicator is hidden The upper jaw will be locked in place Do not clamp the sensor around any conductor 4 Connect the power plug of the CT6710 CT6711 to the power receptacle of the 3269 Power Supply Power receptacle HIOKI CT6710A961 01 ...

Page 37: ...ink as follows Model 3269 The POWER indicator will light up Model CT6710 CT6711 All LEDs will light up for 1 s and then the CT6710 CT6711 will operate as follows The POWER LED will light up The DEMAG AUTO ZERO LED will blink slowly Green will light up Orange will blink slowly Keep the upper jaw locked in place while the POWER LED lights up HIOKI CT6710A961 01 ...

Page 38: ...before executing demagnetization and automatic zero adjustment See Executing demagnetization and automatic zero adjustment p 33 Do not execute demagnetization and automatic zero adjustment or measure current immediately after starting to supply power to the CT6710 CT6711 An offset voltage may increase due to the heat generation of the CT6710 CT6711 HIOKI CT6710A961 01 ...

Page 39: ...t WARNING Do not hold down the DEMAG AUTO ZERO key when the sensor is clamped around a conductor under measurement Conductor under measurement Do not hold down the key Doing so will start magnetization causing bodily injury or damage to the circuit under measurement HIOKI CT6710A961 01 ...

Page 40: ...ation unit is connected with a waveform measuring instrument Doing so could damage the output terminal on the termination unit or the BNC input terminal on the waveform measuring instrument Do not short circuit the output terminal Do not apply voltage to the output terminal Doing so could damage the device HIOKI CT6710A961 01 ...

Page 41: ...ion unit Failure to do so may damage the output terminal When connecting the output terminal to an input terminal that is not a BNC terminal through a conversion plug make sure that the polarity is as follows BNC center contact Positive Outer conductor Ground potential or negative Failure to do so may damage the device and your waveform measuring instrument HIOKI CT6710A961 01 ...

Page 42: ...on and automatic zero adjustment The DEMAG AUTO ZERO LED blinks slowly in the following states The power supply to the CT6710 CT6711 just started A current exceeding the rated current was inputted to the device but this condition was resolved The current value fell below the rated value or stopped Otherwise the sensor was removed from the conductor under measurement During demagnetization with the...

Page 43: ...s may prevent demagnetization or automatic zero adjustment from being completed normally 1 Slide the opening lever of the sensor toward the lower jaw until the JAW UNLOCKED indicator is hidden The upper jaw will be locked in place The JAW UNLOCKED LED will go out Do not clamp the sensor around any conductor 2 Set the input coupling of your waveform measuring instrument to GND then adjust the zero ...

Page 44: ...sert the output terminal straight Insert the output terminal until it clicks so that it is securely locked in position The connection can be established with the unlock lever of the termination unit pointing up regardless of whether the pair of the locking studs in the BNC input terminal on the waveform measuring instrument is fixed in the horizontal or vertical orientation Vertical Horizontal HIO...

Page 45: ...box for about 1 second Hold down The DEMAG AUTO ZERO LED will light up Demagnetization and automatic zero adjustment will start Green will light up Orange will light up After the completion the DEMAG AUTO ZERO LED will go out Green will light up Orange will go out HIOKI CT6710A961 01 ...

Page 46: ... To halt demagnetization or automatic zero adjustment on the middle of its execution Z Z Pull the unlock lever toward you to unlock the upper jaw When you halt demagnetization or automatic zero adjustment re execute demagnetization and automatic zero adjustment before taking a measurement To execute automatic zero adjustment alone without executing demagnetization Z Z Press the DEMAG AUTO ZERO key...

Page 47: ... measured and another wire with the metallic parts of the tips of the sensor Doing so can cause arc flash resulting in serious bodily injury or damage to the device or other equipment Do not measure any current in excess of the derating curve Doing so can cause overheating of the device resulting in bodily injury fire or damage to the device See Frequency derating curve p 78 The maximum measuremen...

Page 48: ...an instrument that does not provide electrical insulation among its input terminals Load Power source H L Load Waveform measuring instrument Model 3269 Power Supply If you do so a short circuit current will flow through the 3269 Power Supply and the CT6710 CT6711 from the ground terminal causing electric shock or damage to the CT6710 CT6711 and the 3296 See the figure in Example of connection to t...

Page 49: ...mage the insulation when clamping the sensor around the conductor Damage to the conductor insulation can cause electric shock Connect the CT6710 CT6711 to the 3269 Power Supply and a waveform measuring instrument oscilloscope or recorder before clamping the device around a live line to be measured Failure to do so may cause electric shock or a short circuit HIOKI CT6710A961 01 ...

Page 50: ...he jaws Eddy current loss may cause heating of the sensor heads Failure to do so could fire or damage to the measurement target and device resulting in burns Keep away any cords and other parts which include the cords of the device from the conductor under measurement Dielectric heating may cause heating of cords and other parts resulting in burns HIOKI CT6710A961 01 ...

Page 51: ...ose to the jaws A current flowing through conductors near the sensor may heat up the sensor heads leading to damage to the device resulting burns When the device is clamped around one of the go and return conductors and the other conductor is placed close to the jaws self heating of both currents will synergistically heat up the sensor heads even if the electric current is lower than the maximum r...

Page 52: ...the blinking state of the OVERLOAD LED Doing so can damage the device resulting in bodily injury Overload warnings are detectable in a frequency band of DC and 45 Hz to 66 Hz sine wave When measuring a current with a frequency outside the frequency detection band the overload warning function may not work properly See Frequency characteristics p 77 The maximum rated current has been specified in l...

Page 53: ...rrent under measurement is lower than the maximum rated current The maximum rated current is defined as a recommended value for when a sine wave current is inputted to the device at the temperatures and humidity specified for the guaranteed accuracy See Frequency derating curve p 78 Connect the device and other probes properly to a circuit to be measured and your waveform measuring instrument Impr...

Page 54: ...nder measurement when the 3269 Power Supply or your waveform measuring instrument is off Doing so may damage the device and instrument Keep the upper jaw locked in place except the following occasions When clamping the sensor around a conductor to be measured When removing the sensor from the conductor Leaving the upper jaw unlocked can damage the device HIOKI CT6710A961 01 ...

Page 55: ...eform measuring instrument Model 3269 Power Supply H L Power source Load Load The 3269 Power Supply can provide the power to up to two probes of the CT6710 CT6711 Connecting the CT6710 CT6711 to a Hioki Memory HiCorder with a power supply module for current probes option installed allows the CT6710 CT6711 to operate without the 3269 Power Supply For more information contact your authorized Hioki d...

Page 56: ...rce while the sensor is clamped around the conductor Changes in ambient temperature and an impact on the sensor head can cause fluctuations in the offset voltage resulting in an adverse effect on the measurement accuracy Be sure to execute demagnetization and automatic zero adjustment before taking measurements Failure to do so can adversely affect the measurement accuracy See Executing demagnetiz...

Page 57: ... direction indicator match the direction of the current to be measured Place the conductor at the center of the sensor aperture High potential side Low potential side Ground potential side 3 Slide the opening lever toward the lower jaw until the JAW UNLOCKED indicator is hidden The upper jaw will be locked in place The JAW UNLOCKED LED will go out HIOKI CT6710A961 01 ...

Page 58: ... A range Switch a higher current range IMPORTANT The instrument may be unable to properly detect overload states immediately after the current range has changed The currents for which an overload state can be detected are DC and sine waves with frequencies of 45 Hz to 66 Hz The device is unable to detect the currents listed below as an overload state Currents that exceed the defined level on a mom...

Page 59: ...e the output waveform will be saturated or distorted preventing you from correctly observing the current waveform You need to choose a current range according to the level of the current under measurement to minimize an adverse effect of noise on observation of the current waveform The following table shows the recommended current ranges for each of the levels of currents under measurement Electri...

Page 60: ...m measuring instrument into a current sensitivity unit A div SI SV RO SI Current sensitivity A div SV Voltage sensitivity V div RO Output rate V A Example When your waveform measuring instrument with its voltage sensitivity set at 10 mV div measures a current that has an RMS value of 1 mA 1 mA div 10 mA div 0 5 A range 10 V A 5 A range 1 V A SI 10 10 3 10 SI 10 10 3 1 1 10 3 A div 10 10 3 A div HI...

Page 61: ...cy currents the position of the conductor under measurement in the sensor aperture may vary the magnitude of load applied to the circuit under measurement adversely affecting the measurement accuracy See Input impedance p 80 The following methods can minimize the adverse effect Straighten the conductor under measurement as long as possible Clamp the sensor at the center of the straight portion of ...

Page 62: ...urement accuracy adversely See Influence of common mode voltage p 82 As needed reduce the frequency band of the waveform measuring instrument or clamp the sensor around the low potential side conductor Load Power source H L OK NO Displayed values can frequently fluctuate due to induction potential even when no voltage is applied This however is not a malfunction HIOKI CT6710A961 01 ...

Page 63: ...rfaces on the sensor heads and thus creates a slight gap between the upper and lower sensor heads the sensor heads may emit a resonant sound Z ZRemove any foreign matter by following the cleaning method See 4 3 Cleaning p 96 An increase in the resonant sound while the device is in use may indicate that the gap between the upper and lower heads has widened The gap may adversely affect the measureme...

Page 64: ...asure a low current 1 Coil a single conductor to be measured into several loops with a diameter of 200 mm or more 2 Clamp the sensor around the loops in a bundle This will make the conductor pass through the sensor aperture one time more than the loop count consecutively in one direction 3 Arrange the loops radially as shown on the following page 4 Measure the current HIOKI CT6710A961 01 ...

Page 65: ...d the seven loops in a bundle allows the conductor to pass through the sensor aperture eight times which increases the voltage of the output signal by a factor of eight Arrange loops radially Low potential side Grounded side High potential side φ200 mm or more HIOKI CT6710A961 01 ...

Page 66: ...wn the DEMAG AUTO ZERO key on the junction box for about 1 second The DEMAG AUTO ZERO LED will light up Demagnetization and automatic zero adjustment will start After the completion the DEMAG AUTO ZERO LED will go out Hold down Before execution orange blinks or goes out 2 Wait for about 5 minutes The fluctuation in the offset voltage will stabilize 3 Operate the opening lever of the sensor back an...

Page 67: ...position relative to each other The JAW UNLOCKED LED will go out 5 Momentarily press the DEMAG AUTO ZERO key on the junction box Do not hold down the key The DEMAG AUTO ZERO LED will light up Automatic zero adjustment will be performed alone After the completion the DEMAG AUTO ZERO LED will go out Press Do not hold down 6 Measure a current See How to measure a current p 50 HIOKI CT6710A961 01 ...

Page 68: ...e blinks rapidly Greens blink rapidly In protection mode the device cannot correctly measure any current Moreover you cannot switch the current ranges When the device has entered protection mode follow the procedure presented on the following pages to restore it to normal operation If the device has entered protection mode it is recommended to re calibrate it because internal components may have b...

Page 69: ...retract the upper jaw and remove the sensor from the conductor under measurement 2 Slide the opening lever toward the lower jaw until the JAW UNLOCKED indicator is hidden The upper jaw will be locked in place 3 Wait for a while to let the junction box cool down to a normal temperature HIOKI CT6710A961 01 ...

Page 70: ... the device entered protection mode will light up and the device will get back to normal The DEMAG AUTO ZERO LED will blink slowly Press any key 5 Perform demagnetization and automatic zero adjustment See Executing demagnetization and automatic zero adjustment p 33 HIOKI CT6710A961 01 ...

Page 71: ... Measurement NOTICE Do not pull the cord to unplug the output terminal Doing so can damage the cord and output terminal Hold the termination unit and disconnect the output terminal while pulling the unlock lever toward you HIOKI CT6710A961 01 ...

Page 72: ...he cord Do not twist the power plug Doing so could damage the cord and the power receptacle of the 3269 Power Supply While holding the shell p 17 pull the power plug out Pulling the shell lets the plug be unlocked so you can disconnect the plug from the power receptacle HIOKI CT6710A961 01 ...

Page 73: ...r under measurement 2 Slide the opening lever toward the lower jaw until the JAW UNLOCKED indicator is hidden The upper jaw will be locked in place The JAW UNLOCKED LED will go out 3 Disconnect the termination unit from the BNC input terminal on the waveform measuring instrument While pulling the unlock lever pull out the termination unit straight HIOKI CT6710A961 01 ...

Page 74: ...FF position 5 Disconnect the power plug of the CT6710 CT6711 from the 3269 Power Supply Hold the shell p 17 of the power plug when you disconnect it Do not pull the cord Do not twist the power plug 6 Unplug the power cord of the 3269 Power Supply from the outlet HIOKI CT6710A961 01 ...

Page 75: ...inutes elapses after the device is turned on before use 3 1 General Specifications Operating environment Indoor Pollution Degree 2 Operating altitude up to 2000 m 6562 ft Operating temperature and humidity 0 C to 40 C 32 F to 104 F 80 RH or less no condensation Storage temperature and humidity range 10 C to 50 C 14 F to 122 F 80 RH or less no condensation Standards Safety EN61010 EMC EN61326 Measu...

Page 76: ...or Approx 155W 18H 26D mm 6 10 W 0 71 H 1 02 D Junction box Approx 45W 120H 25D mm 1 77 W 4 72 H 0 98 D Termination unit Approx 29W 83H 40D mm 1 14 W 3 27 H 1 57 D Excluding BNC connector or protrusions Mass Approx 370 g 13 1 oz Cord lengths Between sensor and junction box Approx 1500 mm 59 06 Between junction box and termination unit Approx 150 mm 5 91 Power cord Approx 1000 mm 39 37 Product warr...

Page 77: ...cy characteristics p 77 in 3 4 Typical Characteristics Rise time 10 to 90 7 0 ns or less Model CT6710 2 9 ns or less Model CT6711 Delay time the time lag between the input signal with a rise time of 1 ns and the output signal 30 A range 12 ns typical 5 A range 12 ns typical 0 5 A range 13 ns typical Current range output rate 30 A range Rate 0 1 V A 5 A range Rate 1 V A 0 5 A range Rate 10 V A HIOK...

Page 78: ... range 0 75 A peak less than 10 MHz 0 3 A peak 10 MHz or more Noise 75 µA rms or less Typical 60 µA rms For only the probe with the 0 5 A range connected with a measuring instrument that has a frequency band of 20 MHz Input impedance See Input impedance p 80 in 3 4 Typical characteristics 1 Depending on the ambient temperature and measurement conditions internal overheating can result in an overlo...

Page 79: ...p time At least 30 minutes Power voltage range 12 V DC 0 5 V Amplitude accuracy 3 30 A range 3 0 rdg 1 mV Typical 1 0 rdg 1 mV for 10 A rms or less 5 A range 3 0 rdg 1 mV Typical 1 0 rdg 1 mV 0 5 A range 3 0 rdg 10 mV Typical 1 0 rdg 10 mV For a direct current and a sine wave current with frequencies of 45 Hz to 66 Hz within the maximum peak current value of each current range 3 Unless there is an...

Page 80: ...netic field 10 mA or less at 3 V m Effect of conducted radio frequency electro magnetic field 10 mA or less at 3 V Effect of external magnetic field 20 mA or less Model CT6710 DC and 60 Hz in a magnetic field of 400 A m 5 mA or less Model CT6711 DC and 60 Hz in a magnetic field of 400 A m 3 Unless there is any change in the state of the facing core surfaces which includes scratches adhesion of for...

Page 81: ...e not available 0 50 0 25 A rms DC and sine wave with frequencies of 45 Hz to 66 Hz Demagnetizing and automatic zero adjustment Operation Executes demagnetization and automatic zero adjustment Means Hold down the DEMAG AUTO ZERO key 1 s Automatic zero adjustment Operation Executes automatic zero adjustment alone Means Press the DEMAG AUTO ZERO key Jaw unlocked detection When the upper jaw is not l...

Page 82: ...5 0 25 A rms 0 5 A range 0 525 0 025 A rms For all the ranges the target currents are of DC and sine wave with frequencies of 45 Hz to 66 Hz 2 Excess of specified temperature Detects an internal temperature anomaly and issues an alert by blinking all of the LEDs except the POWER LED Typical specified temperature 80 C Typical hysteresis 10 C Recovery means Press any key Then the device requires dem...

Page 83: ...racteristics Model CT6710 40 30 20 10 0 10 20 30 1 10 100 1 k 10 k 100 k 1 M 10 M 100 M Gain dB Frequency Hz 0 5 A range 10 V A 5 A range 1 V A 30 A range 0 1 V A Fig 2 Frequency characteristics Model CT6711 40 30 20 10 0 10 20 30 1 10 100 1 k 10 k 100 k 1 M 10 M 100 M Gain dB Frequency Hz 0 5 A range 10 V A 5 A range 1 V A 30 A range 0 1 V A HIOKI CT6710A961 01 ...

Page 84: ...rrent inputted in the temperature and humidity range for the guaranteed accuracy If the ambient temperature TA rises or the current under measurement contains high frequency components the device temperature will rise and thus its continuously inputtable current value and frequency will lower HIOKI CT6710A961 01 ...

Page 85: ...quency Hz 30 A range 5 A range TA 23 C Sine wave Fig 3 Derating curve according to frequency Model CT6710 0 5 10 15 20 25 30 35 100 1 k 10 k 100 k 1 M 10 M 100 M 1 G Maximum input current A Frequency Hz 30 A range 5 A range TA 23 C Sine wave Fig 4 Derating curve according to frequency Model CT6711 HIOKI CT6710A961 01 ...

Page 86: ...der measurement In particular take this characteristic into account when measuring a high frequency current Fig 5 Input impedance Model CT6710 0 001 0 01 0 1 1 100 1 k 10 k 100 k 1 M 10 M 100 M 1 G Frequency Hz Input impedance Ω Fig 6 Input impedance Model CT6711 0 001 0 01 0 1 1 100 1 k 10 k 100 k 1 M 10 M 100 M 1 G Frequency Hz Input impedance Ω HIOKI CT6710A961 01 ...

Page 87: ...ypical Characteristics 3 Consumption current 0 0 2 0 4 0 6 0 8 1 1 2 0 10 20 30 40 50 Consumption current A Input current A DC AC Fig 7 Consumption current with the 30 A range specified HIOKI CT6710A961 01 ...

Page 88: ...ge applied to a conductor under measurement positioned in the sensor aperture and the resulting output voltage Fig 8 Influence of common mode voltage 30 A range 180 160 140 120 100 80 60 40 10 100 1 k 10 k 100 k 1 M 10 M V O V c dB Frequency Hz 0 5 A range 5 A range 30 A range VO Output voltage V VC Common mode voltage V HIOKI CT6710A961 01 ...

Page 89: ...above may cause bodily injury or fire Calibration The calibration interval depends on factors such as operating conditions and environment Please determine the appropriate calibration interval based on your operating conditions and environment and have Hioki calibrate it accordingly on a regular basis HIOKI CT6710A961 01 ...

Page 90: ...uthorized Hioki distributor or reseller When transporting the device be sure to observe the following precautions Remove the CT6710 CT6711 from the 3269 Power Supply Include a memo that describes the problem in detail Pack the device in the packaging in which it was initially delivered and double pack it Damage that occurs during transportation is not covered by the warranty HIOKI CT6710A961 01 ...

Page 91: ...lved the device may be malfunctioning Have the device repaired A resonant sound is emitted from the sensor heads This does not affect the measurement accuracy The sensor head may emit a resonant sound depending on the amplitude and frequency of the current under measurement The resonant sound emitted from the sensor heads becomes louder Calibration of the device is recommended because the gap may ...

Page 92: ...cted whether or not the upper jaw is locked A current exceeding 0 5 A rms has been detected whether or not the upper jaw is locked Implement the remedy described on the following pages See Demagnetizing automatic zero adjustment unavailable p 92 Then re execute demagnetization and automatic zero adjustment See Executing demagnetization and automatic zero adjustment p 33 When demagnetization or aut...

Page 93: ...he demagnetization is asymmetric along the horizontal axis This does not represent a device malfunction After demagnetization and automatic zero adjustment are completed make sure that the zero position on the waveform measuring instrument is appropriate HIOKI CT6710A961 01 ...

Page 94: ...light up or blink See 1 4 Specifications of Lighting Up Blinking LEDs p 22 When an error occurs remedy the error according to measures described on the following pages If the device needs to be repaired contact your authorized Hioki distributor or reseller HIOKI CT6710A961 01 ...

Page 95: ... Orange blinks rapidly Greens blink rapidly The abnormal internal temperature was detected in the junction box and thus the device has entered protection mode Follow the procedure on the following page When the device has entered protection mode p 62 Calibration of the device is recommended Internal components may have been subject to thermal stress HIOKI CT6710A961 01 ...

Page 96: ...ut One of greens lights up The input current exceeding the specified level of each current range is detected When you use the 30 A range Immediately remove the sensor from the conductor under measurement When you use the 0 5 A range or 5 A range Switch a higher current range HIOKI CT6710A961 01 ...

Page 97: ...ne waves with frequencies of 45 Hz to 66 Hz The device is unable to detect the currents listed below as an overload state Currents that exceed the defined level on a momentary basis High frequency currents that exceed the defined level Although external magnetic fields may cause the OVERLOAD LED to blink while the upper jaw is retracted this does not indicate an issue with the device HIOKI CT6710A...

Page 98: ...s not been completed normally The device must be in the following conditions The upper jaw is unlocked An overload has been detected whether or not the upper jaw is locked A current exceeding 0 5 A rms has been detected whether or not the upper jaw is locked Depending on the LED status exhibited after the three blinks implement the remedy described on the following pages After that re execute dema...

Page 99: ... until the JAW UNLOCKED indicator is hidden to lock the upper jaw in place Green lights up Red blinks rapidly Red lights up or goes out An overload is detected Remove the sensor from the conductor under measurement Then slide the opening lever of the sensor toward the lower jaw until the JAW UNLOCKED indicator is hidden to lock the upper jaw in place HIOKI CT6710A961 01 ...

Page 100: ...ut A current exceeding 0 5 A rms has been detected Remove the sensor form the conductor under measurement Then slide the opening lever of the sensor toward the lower jaw until the JAW UNLOCKED indicator is hidden to lock the upper jaw in place HIOKI CT6710A961 01 ...

Page 101: ...r All LEDs blink rapidly An internal CPU error checksum error has occurred Have the device repaired Green Reds Orange Greens Malfunction No LEDs light up The device is malfunctioning Have the device repaired HIOKI CT6710A961 01 ...

Page 102: ...vice to high voltage may damage the internal Hall elements and circuitry Periodically clean the vents to avoid blockage When the vents get clogged the internal cooling effect of the device is hampered and this can lead to damage to the device IMPORTANT Keep the facing core surfaces of the sensor heads clean by gently wiping them with a soft dry cloth Dirt on the facing core surfaces can adversely ...

Page 103: ...97 Disposal 4 4 4 Disposal Dispose of the device in accordance with local regulations HIOKI CT6710A961 01 ...

Page 104: ...98 Disposal HIOKI CT6710A961 01 ...

Page 105: ...mon mode noise 56 Common mode voltage 82 Consumption current 29 81 Current direction indicator 21 D DEMAG AUTO ZERO key 18 DEMAG AUTO ZERO LED 19 23 Blinking slowly 36 Demagnetization 36 Abnormal operation 86 Demagnetization waveform 36 87 Dielectric heating 44 Disposal 97 E Eddy current loss 44 Error 88 Index Index HIOKI CT6710A961 01 ...

Page 106: ...cs 77 Frequency derating 41 78 H Higher range key 18 53 I Input coupling 37 Input impedance 26 80 J Jaws 21 JAW UNLOCKED indicator 21 JAW UNLOCKED LED 19 23 Junction box 18 K Keys 18 DEMAG AUTO ZERO 18 Higher range 18 53 Lower range 18 53 HIOKI CT6710A961 01 ...

Page 107: ...90 POWER 19 22 RANGE 19 23 Low current 58 Lower range key 18 53 M Maintenance 83 Maximum peak current 72 Maximum rated current 72 Model 3269 Power Supply 6 30 O Offset voltage 36 50 60 Opening lever 21 Option 6 Output terminal 17 Overload 22 52 90 OVERLOAD LED 19 23 90 P POWER LED 19 22 Power plug 17 30 Protection mode 62 Index HIOKI CT6710A961 01 ...

Page 108: ...dex R RANGE LEDs 19 23 Resonant sound 57 85 S Sensor 20 Sensor heads 21 Serial number 17 Service 83 Shell 17 T Termination unit 16 U Unlock lever 17 V Vents 17 W Waveform Not displayed 85 HIOKI CT6710A961 01 ...

Page 109: ...HIOKI CT6710A961 01 ...

Page 110: ...HIOKI CT6710A961 01 ...

Page 111: ...HIOKI CT6710A961 01 ...

Page 112: ...uctions Nov 2018 Revised edition 2 BT3554A966 02 A961 03 18 11H Manuel d instructions Nov 2018 Revised edition 2 BT3554A966 02 A961 03 18 11H BT3554 10 BT3554 01 BT3554 11 TESTEUR DE BATTERIE BATTERY TESTER BT3554 BT3554 10 BT3554 01 BT3554 11 HIOKI CT6710A961 01 ...

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