Iwatsu SS-530 Instruction Manual Download Page 65

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Measuring Currents

As shown in the figure below, clamping the sensor around
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.



200 mm or more

High-potential

side

Low-potential

side

(Grounded side)

Summary of Contents for SS-530

Page 1: ...Instruction Manual Current Probe SS 530 SS 531...

Page 3: ...ach instruction of 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 demag...

Page 4: ...Waveform measuringinstrument H L Power source Load Model PS 54 Power Supply Connection Example See Example of connection to the circuit to be measured p 49...

Page 5: ...20 1 4 Specifications 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 SS 530 SS 531 29 Executi...

Page 6: ...pecifications 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...

Page 7: ...y band listed below Model SS 530 DC to 50 MHz Model SS 531 DC to 120 MHz To obtain maximum performance from the device please read this manual first and keep it handy for future reference Target audie...

Page 8: ...n death or serious injury WARNING Indicates a potentially hazardous situation that if not avoided could result in death or serious injury CAUTION Indicates a potentially hazardous situation that if no...

Page 9: ...cations where this symbol appears on device components see the Usage Notes section p 8 warning messages listed at the beginning of operating instructions Notations Symbols shown on the device Symbols...

Page 10: ...ed value Indicates the value the measuring instrument displays Tolerances for reading errors are expressed in percent of reading of reading rdg Notations Others Accuracy IWATSU defines tolerances for...

Page 11: ...lar attention to keys and connectors If you find any damage or discover that the device does not perform as indicated in its specifications please contact your authorized IWATSU distributor or reselle...

Page 12: ...ebsite for the latest information Model PS 54 Power Supply The PS 54 Power Supply can provide the power to up to two probes of the SS 530 SS 531 The PS 52 Power Supply cannot be used as a power supply...

Page 13: ...e ineffective Please review the safety information below before using the device Read this manual carefully and ensure you understand its contents before using the device Improper use of the device co...

Page 14: ...ely Use of the device should conform not only to its specifications but also to the specifications of all accessories options and other equipment in use Do not use the device for measuring bare conduc...

Page 15: ...damage 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 D...

Page 16: ...corrosive 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 wou...

Page 17: ...erturn 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...

Page 18: ...in the figure below while the upper jaw is locked in place Do not apply force Opening lever position when the upper jaw is locked in place Doing so may damage the retracting extending mechanism Keep t...

Page 19: ...uses three 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 oscillosc...

Page 20: ...ism p 21 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 t...

Page 21: ...1 mA to 50 A Broad frequency band p 71 Model SS 530 DC to 50 MHz Model SS 531 DC to 120 MHz Demagnetizing and automatic zero adjustment functions p 33 You can use a single key to demagnetize the magn...

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

Page 23: ...The unit has 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 dig...

Page 24: ...s demagnetization followed by automatic zero adjustment p 33 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 3...

Page 25: ...ly blinks 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...

Page 26: ...device in 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 5 When t...

Page 27: ...The sensor 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 directio...

Page 28: ...n the device has entered protection mode p 62 Device state LED Automatic zero adjustment Overload Others Green POWER 1 On start up 2 Not performed Not detected Initial state 3 In execution Incl demag...

Page 29: ...pidly 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 ra...

Page 30: ...24 Specifications of Lighting Up Blinking LEDs...

Page 31: ...or heads Doing so could adversely affect the measurement accuracy and the retracting extending mechanism 2 Current Measurement Do not clog the vents on the sides and bottom of the termination unit p 1...

Page 32: ...shipping and verify proper operation before use If you find any damage or failure contact your authorized IWATSU distributor or reseller See Before sending back your device for repair p 85 Items to pr...

Page 33: ...t clamp the sensor around any damaged conductor Is the insulation of each conductor to be measured damaged Have the device repaired The device is damaged Do the seven LEDs light up for about one secon...

Page 34: ...the rear panel of the PS 54 Power Supply verify that the supply voltage you plan to use falls within the supply voltage range noted on the PS 54 Supplying a voltage that falls outside the specified ra...

Page 35: ...nt One unit of the PS 54 can simultaneously provide power to up to two current probes the SS 530 SS 531 each of which measures a current with the maximum rated current value For information about the...

Page 36: ...r cord to the power inlet on the back of the PS 54 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...

Page 37: ...up or blink as follows Model PS 54 The POWER indicator will light up Model SS 530 SS 531 All LEDs will light up for 1 s and then the SS 530 SS 531 will operate as follows The POWER LED will light up T...

Page 38: ...current 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...

Page 39: ...zero adjustment 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 magne...

Page 40: ...he termination 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 D...

Page 41: ...ermination 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 polarit...

Page 42: ...gnetization and automatic zero adjustment The DEMAG AUTO ZERO LED blinks slowly in the following states The power supply to the SS 530 SS 531 just started A current exceeding the rated current was inp...

Page 43: ...d normally Preparing for Measurement How to execute demagnetizing and automatic zero adjustment 1 Slide the opening lever of the sensor toward the lower jaw until the JAW UNLOCKED indicator is hidden...

Page 44: ...rument Insert 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 terminati...

Page 45: ...nction 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...

Page 46: ...ilable p 92 To halt demagnetization or automatic zero adjustment on the middle of its execution Pull the unlock lever toward you to unlock the upper jaw When you halt demagnetization or automatic zero...

Page 47: ...e to be 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 me...

Page 48: ...instrument that does not provide electrical insulation between its input terminals and chassis an instrument that does not provide electrical insulation among its input terminals If you do so a short...

Page 49: ...t to damage the insulation when clamping the sensor around the conductor Damage to the conductor insulation can cause electric shock Connect the SS 530 SS 531 to the PS 54 Power Supply and a waveform...

Page 50: ...ay from the 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 par...

Page 51: ...ped around a conductor 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...

Page 52: ...dless of 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 m...

Page 53: ...f the current 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 temper...

Page 54: ...ductor under measurement when the PS 54 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...

Page 55: ...input terminals equipped such as a general oscilloscope Model PS 54 Power Supply The PS 54 Power Supply can provide the power to up to two probes of the SS 530 SS 531 Connecting the SS 530 SS 531 to...

Page 56: ...ure to force 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 effec...

Page 57: ...current direction indicator match the direction of the current to be measured Place the conductor at the center of the sensor aperture 3 Slide the opening lever toward the lower jaw until the JAW UNLO...

Page 58: ...ed the defined level Measuring Currents 4 Check the LEDs on the junction box The POWER LED and one of the RANGE LEDs light up There is no error Go on to step 5 The OVERLOAD LED blinks rapidly The devi...

Page 59: ...range 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 me...

Page 60: ...waveform measuring instrument into a current sensitivity unit A div SI SV RO SI Current sensitivity A div SV Voltage sensitivity V div RO Output sensitivity V A Example When your waveform measuring i...

Page 61: ...frequency 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 ac...

Page 62: ...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 H Pow...

Page 63: ...core surfaces 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 Remove any foreign matter by following the cleaning...

Page 64: ...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...

Page 65: ...r around 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 2...

Page 66: ...1 Hold down 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...

Page 67: ...ged in 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 A...

Page 68: ...dly Orange 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 m...

Page 69: ...you to 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...

Page 70: ...ed before 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 a...

Page 71: ...nishing Measurement 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 u...

Page 72: ...t pull the cord Do not twist the power plug Doing so could damage the cord and the power receptacle of the PS 54 Power Supply While holding the shell p 17 pull the power plug out Pulling the shell let...

Page 73: ...he 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 Disconnect the termination unit from the BNC inp...

Page 74: ...he power plug of the SS 530 SS 531 from the PS 54 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...

Page 75: ...on 30 minutes 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...

Page 76: ...Dimensions Sensor 155W 18H 26D mm 2mm 6 10 W 0 71 H 1 02 D Junction box 45W 120H 25D mm 2mm 1 77 W 4 72 H 0 98 D Termination unit 29W 83H 40D mm 2mm 1 14 W 3 27 H 1 57 D Excluding BNC connector or pr...

Page 77: ...ee Frequency characteristics p 77 in 3 4 Typical Characteristics Rise time 10 to 90 7 0 ns or less Model SS 530 2 9 ns or less Model SS 531 Delay time the time lag between the input signal with a rise...

Page 78: ...peak 0 5 A range 0 75 A peak less than 10 MHz 0 3 A peak 10 MHz or more Noise 75 A rms or less Typical 60 A rms For only the probe with the 0 5 Arange connected with a measuring instrument that has a...

Page 79: ...Warm up 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...

Page 80: ...ectro magnetic 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 SS 530 DC and 60 Hz in...

Page 81: ...tions are not available 0 50 0 25 A rms DC and sine wave with frequencies of 45 Hz to 66 Hz Demagnetizing and automaticzero adjustment Operation Executes demagnetization and automatic zero adjustment...

Page 82: ...range 5 25 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 inter...

Page 83: ...ency characteristics 30 20 10 0 10 20 30 40 1 10 100 1k 10k 100k 1M 10M 100M Frequency Hz Fig 1 Frequency characteristics Model SS 530 30 20 10 0 10 20 30 40 1 10 100 1k 10k 100k 1M 10M 100M Frequency...

Page 84: ...e wave current 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 de...

Page 85: ...00k 1M 10M 100M 1G Frequency Hz Fig 3 Derating curve according to frequency Model SS 530 35 30 25 20 15 10 5 0 100 1k 10k 100k 1M 10M 100M 1G Frequency Hz Fig 4 Derating curve according to frequency M...

Page 86: ...ad in a circuit under measurement In particular take this characteristic into account when measuring a high frequency current 1 0 1 0 01 0 001 100 1k 10k 100k 1M 10M 100M 1G Frequency Hz Fig 5 Input i...

Page 87: ...81 Typical Characteristics Consumption current 1 2 1 0 8 0 6 0 4 0 2 0 0 10 20 30 40 50 Input current A Fig 7 Consumption current with the 30 A range specified 3 Consumption current A...

Page 88: ...ommon mode voltage external noise voltage applied to a conductor under measurement positioned in the sensor aperture and the resulting output voltage 40 60 80 100 120 140 160 180 10 100 1k 10k 100k 1M...

Page 89: ...g the 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 b...

Page 90: ...t your authorized IWATSU distributor or reseller When transporting the device be sure to observe the following precautions Remove the SS 530 SS 531 from the PS 54 Power Supply Include a memo that desc...

Page 91: ...en resolved 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 resonan...

Page 92: ...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 Implement the remedy described on the following pages See De...

Page 93: ...uring the 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...

Page 94: ...ox will 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 b...

Page 95: ...rapidly 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 follow...

Page 96: ...ge goes out 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...

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 cur...

Page 98: ...ment has 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...

Page 99: ...er jaw 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 conduct...

Page 100: ...or goes out 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 UNLOCKE...

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

Page 102: ...liquid Doing so damage the device Discharge any static electricity on your body before cleaning the facing core surfaces of the sensor heads and the metallic parts of the connectors Subjecting the dev...

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

Page 104: ...98...

Page 105: ...ontact Us Overseas Sales Sect Sales Dept No 2 Address 1 7 41 Kugayama Suginami ku Tokyo 168 8501 Japan Phone 81 3 5370 5483 Facsimile 81 3 5370 5492 Web Site https www iti iwatsu co jp index_e html E...

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