YOKOGAWA 702915 User Manual Download Page 48

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IM 702915-01EN

6. Troubleshooting

• If damage is suspected, check “Before Sending the Instrument for

Repair” before contacting your nearest YOKOGAWA dealer.

• If no waveform is displayed even after performing demagnetization

and zero adjustment, the instrument may be damaged. Contact your
nearest YOKOGAWA dealer.

Before Sending the Instrument for Repair

Symptom

Check and Corrective Action

No waveform is

displayed on the

connected waveform

measuring instrument.

• Perform demagnetization and zero adjustment again.

• Verify that the waveform measuring instrument’s input

coupling is set to DC. If this does not resolve the issue,

the instrument may be damaged. Have it repaired.

A resonant sound is

emitted by the sensor

head.

A resonant sound may be emitted depending on the

amplitude and frequency of the current being measured.

It may also be emitted during demagnetization. This

does not affect measurement.

The resonant sound

emitted by the sensor

head has grown louder.

The spacing between the upper and lower sensors

may be have widened. The sensor characteristics may

change, so we recommend calibrating the sensor.

The positive and

negative sides of

demagnetization

waveform are

asymmetric.

This is not a malfunction. After demagnetization and zero

adjustment, verify that the zero position of the waveform

measuring instrument is at the correct position.

Demagnetization and

zero adjustment do not

complete normally.

Demagnetization and automatic zero adjustment cannot

be performed in the following circumstances: Perform

the following corrective action, and then perform

demagnetization and zero adjustment again.

Condition

Corrective Action

The JAW UNLOCKED LED

is lit.

Lock the sensor head.

(Press the opening

lever until the JAW

UNLOCKED indicator

turns off.)

The OVERLOAD LED is

blinking.

Remove the instrument

from the conductor being

measured.

A current of 0.5 Arms or

higher was detected.

If demagnetization and zero adjustment do not complete

normally even when current is not being measured, the

instrument is broken. Have it repaired.

Summary of Contents for 702915

Page 1: ...User s Manual Model 702915 702916 Current Probe IM 702915 01EN 1st Edition ...

Page 2: ...ing YOKOGAWA products YOKOGAWA provides registered users with a variety of information and services Please allow us to serve you best by completing the product registration form accessible from our website https tmi yokogawa com PIM 103 04E_A5 ...

Page 3: ...information of Yokogawa offices worldwide is provided on the following sheet Document Number Description PIM113 01Z2 Inquiry List of worldwide contacts Notes The contents of this manual are subject to change without prior notice as a result of continuing improvements to the instrument s performance and functions The figures given in this manual may differ from those that actually appear on your sc...

Page 4: ...cluded If the wrong items have been delivered if items are missing or if there is a problem with the appearance of the items contact your nearest YOKOGAWA dealer 702915 or 702916 1 see figure below Manuals 1 set see List of Manuals above Carrying case 1 702915 CURRENT PROBE ...

Page 5: ...ire special instructions for proper handling or use The same symbol appears in the corresponding place in the manual to identify those instructions This symbol indicates that the instrument cannot be used on electric circuits that may cause an electrical shock or electrical burn French Avertissement À manipuler délicatement Toujours se reporter aux manuels d utilisation et d entretien Ce symbole a...

Page 6: ...inal of this instrument or the internal circuitry live and dangerous Be sure to ground the measurement instrument When connecting the probe to the object under measurement be careful of electric shock Do not remove the probe from the measurement instrument while the probe is connected to the object under measurement Before connecting the probe to the object under measurement check that the measuri...

Page 7: ...not short circuit between the two measurement lines with the metal part of the sensor unit It may lead to a serious accident such as the occurrence of an arc Use this instrument within the operating temperature and humidity ranges To prevent electric shock or fire or damage to this instrument do not install in the following places In direct sunlight or hot location In the presence of flammable gas...

Page 8: ...qui pourrait être dangereux Assurez vous de relier à la terre l équipement de mesure Lorsque vous raccordez la sonde à l objet à mesurer soyez attentif au choc électrique Ne retirez pas la sonde de l équipement de mesure si elle est raccordées à l objet à mesurer Avant de raccorder la sonde à l objet à mesurer vérifiez que l équipement de mesure et l alimentation électrique sont correctement relié...

Page 9: ...as court circuiter entre les deux lignes de mesure avec la partie métallique du capteur Cela peut entraîner un accident grave tel que l apparition d un arc Utilisez cet équipement dans les plages de température de fonctionnement et d humidité Pour éviter tout choc électrique ou tout incendie ou encore éviter d endommager cet équipement ne l installez pas dans les endroits suivants Exposé aux rayon...

Page 10: ...made of a molded part ferrite core Hall effect element and so on It can be damaged due to drastic changes in ambient temperature mechanical stress or shock Handle it with care The facing surfaces of the sensor head are precisely ground Handle with care because if the surfaces are scratched the performance will be affected If dirt or the like adheres to the facing surfaces of the sensor head wipe t...

Page 11: ...able or sloped surface The instrument may fall or roll and cause injury or damage to the instrument Do not turn the terminator of this instrument when it is connected to the waveform measuring instrument Doing so can damage the terminator or the input terminal of the waveform measuring instrument Do not allow current to flow through the instrument when the connected waveform measuring instrument i...

Page 12: ...ument The maximum rated current is a recommended value when a sine signal is applied under standard conditions Self heating increases if the ambient temperature increases or if the measured current waveform contains other frequency components See the derating characteristics in the product specifications In addition to the maximum rated current the product specifications that indicate the maximum ...

Page 13: ...stocker ou d utiliser la sonde en l exposant aux rayons directs du soleil ou dans des zones à haute température forte humidité ou forte condensation Une déformation et une détérioration de l isolation peuvent se produire et avoir pour conséquences que la sonde ne soit plus conforme aux spécifications Avant l utilisation inspectez et contrôlez le fonctionnement de la sonde afin de vérifier qu elle ...

Page 14: ...gées d électricité statique lorsque vous nettoyez les faces de la tête du capteur Lorsque vous nettoyez les surfaces prenez des mesures anti électricité statique telles que le port d un bracelet antistatique Pour dépoussiérer au chiffon l équipement appliquez une petite quantité d eau ou d agent neutre sur un chiffon doux et essuyez soigneusement N utilisez jamais d agent contenant du benzène de l...

Page 15: ...de déverrouillage puis retirez le N appliquez pas un courant de 10 kHz ou plus sur les conducteurs à proximité de la tête de capteur de l équipement La température de la tête du capteur risque d augmenter suite à une surchauffe automatique due au courant circulant à travers le conducteur ce qui risque d entraîner un endommagement Comme l indique la figure ci dessous si l un des conducteurs bidirec...

Page 16: ...ors de la plage de fréquence de détection de surcharge Que la LED de SURCHARGE clignote ou non faites attention de ne pas dépasser le courant nominal maximal Verrouiller les mâchoires sauf lors du serrage sur le conducteur à mesurer et lors de son retrait du conducteur Le laisser ouvert peut endommager le produit Si le son résonnant augmente pendant l utilisation cela signifie que l espace entre l...

Page 17: ... WEEE directive this product is classified as a Monitoring and control instruments product Do not dispose in domestic household waste When disposing products in the EU contact your local Yokogawa office in Europe Authorized Representative in the EEA Yokogawa Europe B V shall act as Authorized Representative of Yokogawa Test Measurement Corporation in the EEA for this Product To contact Yokogawa Eu...

Page 18: ...s that can be taken to prevent such occurrences CAUTION Calls attention to actions or conditions that could cause light injury to the user or damage to the instrument or user s data and precautions that can be taken to prevent such occurrences Note Calls attention to information that is important for the proper operation of the instrument French AVERTISSEMENT Attire l attention sur des gestes ou d...

Page 19: ...Product Overview 18 2 Configuration and Functions 19 Configuration and Component Names 19 Component Functions 20 LED Display Functions 22 3 Operation Procedure 23 Handling Precautions 23 Measurement Preparation 24 Demagnetization and Zero Adjustment 27 Measurement Method 30 Ending Measurement 35 4 Product Specifications 37 Electrical Specifications 37 General Specifications 38 External Dimensions ...

Page 20: ... of current waveforms from 1 mA to 30 Arms with a single unit The probes can be connected directly through the termination unit to a BNC input terminal of a waveform measuring instrument such as a Yokogawa s oscilloscope and recorder and then current waveforms are easily measured and observed simply by clamping the target conductor Model 702915 covers frequency range from DC to 50 MHz Model 702916...

Page 21: ...RENT PROBE Sensor Unit Junction Box Termination Unit Power Cable Current Direction Mark Output Terminal Lock Release Lever Power Plug Sensor Aperture Jaw Opening Lever Shell Sensor Unit Sensor Head DEMAG AUTO ZERO Key POWER Range Key OVERLOAD JAW UNLOCKED Junction Box LED DEMAG AUTO ZERO RANGE ...

Page 22: ...st pass through this aperture Insulated conductor can be measured Measurable diameter of conductors is 5 mm or less Current direction mark Clamp the jaw around a conductor so this mark matches the current direction of the conductor to be measured Lock release lever This lever is for releasing the output terminal lock To remove the output terminal release the lock with this lever first DEMAG AUTO Z...

Page 23: ...ge and 0 1 V A 30 A range Power plug This plug is connected to a power terminal of a oscilloscope with probe power supply or to a power supply receptacle of a power supply unit model 701934 sold separately in order to supply power to 702915 702916 Overload When a current DC and 45 to 66 Hz sine wave exceeding the following level specified for each current range is detected the overload indicator b...

Page 24: ...tection mode Checksum error occurred JAW UNLOCKED red Solid The upper jaw not locked Blinks 3 times Demag auto zero error occurred Blinks rapidly Switched to protection mode Checksum error occurred DEMAG AUTO ZERO orange Blinks slowly Demag auto zero not performed Solid Demag auto zero in progress Off Demag auto zero performed Blinks 3 times Demag auto zero error occurred Blinks rapidly Switched t...

Page 25: ...lines with the metal part of the sensor unit It may lead to a serious accident such as the occurrence of an arc French AVERTISSEMENT Ne serrez pas un conducteur nu Une telle action est dangereuse car le noyau et le casier de blindage ne sont pas isolés Faites attention de ne pas endommager le cache d isolation du conducteur Ne pas court circuiter entre les deux lignes de mesure avec la partie méta...

Page 26: ...the 702915 702916 current probe depends on the measured current Make sure that the total current consumption of all active probes do not exceed the current specifications of the 701934 probe power supply or the probe power supply of the YOKOGAWA waveform measuring instrument For details on usage limitations according to each measuring instrument see the following YOKOGAWA webpage https tmi yokogaw...

Page 27: ...ent de mesure reportez vous à la page Web YOKOGAWA ci dessous https tmi yokogawa com products oscilloscopes current probes Prepare this instrument and a waveform measuring instrument such as a digital oscilloscope or recorder If the waveform measuring instrument is not equipped with a probe power supply prepare also a 701934 power supply 1 If you are using a YOKOGAWA waveform measuring instrument ...

Page 28: ... adjustment is taking place Note The instrument s output is internally terminated Use a waveform measuring instrument with an input impedance of 1 MΩ or higher Correct measurement is not possible with an input impedance of 50 Ω The offset drift may be large immediately after starting to supply power due to instrument s self heating and other effects To make accurate measurements warm up for at lea...

Page 29: ...tisation remise à zéro automatique pour la démagnétisation Cette action risquerait d endommager le circuit à mesurer ou d entraîner un choc électrique ou une combustion CAUTION Do not demagnetize with a conductor clamped The current that flows through the conductor as a result of demagnetization may damage components of the circuit under measurement For the same reason make sure that the conductor...

Page 30: ... excessive input and so on Zero adjustment is used to correct the instrument s inherent offset voltage and offset voltage variation caused by temperature changes or the like 1 Set the input coupling of the waveform measuring instrument to GND and adjust the zero position on the display 2 Set the input coupling of the waveform measuring instrument to DC 3 Connect this instrument s output terminal t...

Page 31: ...er or after a condition in which the rating is exceeded is removed the DEMAG AUTO ZERO LED blinks slowly until demagnetization and zero adjustment are executed While demagnetization is taking place the DEMAG AUTO ZERO LED is on a demagnetization waveform waveform that attenuates over time is output from this instrument s output terminal and appears on the waveform measuring instrument The positive...

Page 32: ...o zero Adequate cooling period will be required until the probe can output correct values again In a high temperature environment the internal overcurrent protection circuit may be activated even at currents within the continuous maximum input range If current exceeding the continuous maximum input range is applied continuously or if the protection function is activated frequently the instrument m...

Page 33: ...d entrée continue maximale est appliqué la fonction de protection interne est activée suite à la chaleur générée par le capteur et la sonde ne donne pas de valeur correcte Le cas échéant retirez immédiatement l entrée retirez la tête du capteur du conducteur ou remettez le courant d entrée à zéro La période de refroidissement adéquate sera requise jusqu à ce que la sonde puisse donner à nouveau de...

Page 34: ...nisme de serrage N exercez pas de force sur la tête du capteur dans le sens indiqué sur la figure ci dessous État verrouillé N enfoncez pas X X Before measuring check that there are no problems with the instrument or the measurement target and that measurement preparations have been taken 1 Pull the sensor opening lever to open the upper jaw 2 Align the direction of the arrow of the current direct...

Page 35: ...igh accuracy follow the procedure below At this time if a large impact is applied to the sensor head the offset voltage fluctuation may increase so operate the lever slowly 1 Press and hold DEMAG AUTO ZERO for about 1 second Demagnetization and zero adjustment are performed 2 Wait about 5 minutes for the offset drift to stabilize 3 Use the opening lever to open and close 4 or 5 times 4 Clamp the c...

Page 36: ...ccur but this has no effect on measurements In the high frequency region the probe may be affected by common mode noise by clamping the high potential side of an electric circuit If necessary limit the bandwidth of the waveform measuring instrument or clamp the low potential side Power source Load H L Accurate measurements may not be possible near objects with strong electromagnetic fields such as...

Page 37: ...ed to the jaw or opening lever during measurement Ending Measurement Notes on Ending Measurement To remove the instrument s power cable from the power supply pull the power cable shell CAUTION To prevent breaking the cable do not pull the cord when removing the output terminal from the waveform measuring instrument Be sure remove by holding the terminator and pulling the lock release lever toward ...

Page 38: ...etirez le câble d alimentation Tenez le boîtier de la fiche secteur et retirez le dispositif Ne tirez pas sur le câble et ne faites pas pivoter la fiche secteur Le fait de tirer sur le boîtier de la fiche secteur entraîne un déverrouillage qui vous permet de le retirer de la prise secteur 1 Pull the opening lever toward you and remove the instrument from the conductor 2 Remove the terminator from ...

Page 39: ...l 3 Maximum peak current 30 A range 50 Apeak maximum 2 sec input 5 A range 7 5 Apeak 0 5 A range 0 75 Apeak less than 10 MHz 0 3 Apeak 10 MHz or more Noise7 75 µArms 60 µArms typical 3 Input impedance Depend on frequency8 Temperature characteristics of sensitivity9 2 0 rdg Effects of radiated radio frequency electro magnetic field 10 mA or less at 3 V m Effects of conducted radio frequency electro...

Page 40: ...or unit to junction box Approx 1500 mm Junction box to termination unit Approx 150 mm Power cord Approx 1000 mm Weight Approx 370 g Measurable conductors Insulated conductors Measurable diameter of conductors 5 mm or less in diameter Connector type BNC type Power supply1 Rated supply voltage DC 12 V 0 5 V Maximum rated power 7 8 VA probe only at 30 Arms continuously Consumption current Depends on ...

Page 41: ...N External Dimensions 702915 CURRENT PROBE Sensor Unit Junction Box Termination Unit 18 45 150 1000 26 25 Unit mm Cable Length 1500 29 155 120 83 40 Cable Length Power Cable Length Sensor Unit 4 Product Specifications ...

Page 42: ...uaranteed Frequency Characteristics Frequency Hz 702915 50MHz Frequency Response 40 30 20 10 30 10 k 1 M 10 M 100 M Gain dB 1000 M 1 100 10 1 k 100 k 0 10 20 0 5 A range 5 A range 30 A range Frequency Hz 702916 120MHz Frequency Response 40 30 20 10 30 10 k 1 M 10 M 100 M Gain dB 1000 M 1 100 10 1 k 100 k 0 10 20 0 5 A range 5 A range 30 A range ...

Page 43: ...Frequency Derating 0 5 10 15 35 10 k 1 M 10 M 100 M Maximum Input Current A 1000 M 100 1 k 100 k 20 25 30 30 A range 5 A range Frequency Hz 702916 120MHz Frequency Derating 0 5 10 15 35 10 k 1 M 10 M 100 M Maximum Input Current A 1000 M 100 1 k 100 k 20 25 30 5 Typical Characteristics ...

Page 44: ... 702915 50MHz Input Impedance 0 001 0 01 1 10 k 1 M 10 M 100 M Input Impedance Ω 1 G 100 1 k 100 k 0 1 Frequency Hz 702916 120MHz Input Impedance 0 001 0 01 1 10 k 1 M 10 M 100 M Input Impedance Ω 1000 M 100 1 k 100 k 0 1 5 Typical Characteristics ...

Page 45: ...5 Power Supply DC Power Supply DC Power Supply DC Power Supply AC 50Hz Power Supply AC 50Hz Consumption Current 5 A range 250 200 0 50 0 3 0 4 5 7 5 6 0 3 0 100 250 7 5 150 100 50 150 200 4 5 1 5 6 0 1 5 Consumption Current mA Measured Current A Power Supply DC Power Supply AC 50Hz Power Supply DC Power Supply DC Power Supply AC 50Hz 5 Typical Characteristics ...

Page 46: ...t A Power Supply DC Power Supply AC 50Hz Power Supply DC Power Supply DC Power Supply AC 50Hz Influence of Common Mode Voltage 0 5A range 5A range 30A range Frequency Hz Inﬂuence of Common mode Voltage 702915 702916 180 160 140 120 10k 100k Output Voltage Common mode Voltage dB 1M 10 100 1k 100 80 40 10M 60 5 Typical Characteristics ...

Page 47: ...2 3 0 0 1 0 2 0 1 0 3 0 4 0 5 0 3 0 2 0 4 0 5 Inﬂuence of Residual Magnetization 5 A range Inﬂuence of Residual Magnetization mA Input Current A 3 2 0 1 1 2 3 0 1 2 1 3 4 5 3 2 4 5 Inﬂuence of Residual Magnetization 30 A range Inﬂuence of Residual Magnetization mA Input Current A 10 2 0 4 4 8 10 2 6 8 6 0 5 10 5 15 20 25 15 10 20 30 30 25 5 Typical Characteristics ...

Page 48: ...ound emitted by the sensor head has grown louder The spacing between the upper and lower sensors may be have widened The sensor characteristics may change so we recommend calibrating the sensor The positive and negative sides of demagnetization waveform are asymmetric This is not a malfunction After demagnetization and zero adjustment verify that the zero position of the waveform measuring instrum...

Page 49: ...d Blinks rapidly in orange Blink rapidly in green This mode detects the abnormal internal temperature of the junction box and reduces power consumption The current cannot be measured correctly in protection mode Set temperature 80 C typical Hysteresis 10 C typical Remove the sensor from the conductor to be measured and wait until the temperature of the Junction box drops If pressing any key on the...

Page 50: ...0 025 Arms DC and 45 to 66 Hz sine waves If using the 30 A range remove the sensor from the conductor to be measured For the 0 5 A or 5 A range switch to the larger current range Overload cannot be detected for currents momentarily exceeding the specified level or for high frequency currents exceeding the specified level Also immediately after switching the current range overload may not be detect...

Page 51: ...tomatic zero adjustment has not finished properly The instrument is in one of the following status The upper jaw not locked JAW UNLOCKED lights up An overload detected regardless of Jaw locked state OVERLOAD blinks rapidly A measured current exceeding the following values detected regardless of Jaw locked state 0 50 0 25 Arms DC 45 to 66 Hz sine waves Take any of the following actions depending on...

Page 52: ...ED Lights in green Blinks rapidly in red Lights in red or turns off Remove the sensor from the conductor to be measured Then press the opening lever until the JAW UNLOCKED indicator disappears to lock the jaw Over 0 5 A detected POWER OVERLOAD JAW UNLOCKED Lights in green Turns off Lights in red or turns off Remove the sensor from the conductor to be measured Then press the opening lever until the...

Page 53: ...ERO DEMAG All LEDs blink rapidly Green Red Orange Green There is something wrong with the internal CPU Please request repair Malfunction POWER OVERLOAD JAW UNLOCKED RANGE 30A 0 1V A 5A 1V A 0 5A 10V A AUTO ZERO DEMAG All LEDs turn off The instrument is out of order Please request repair 6 Troubleshooting ...

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