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6

 

 

Read the following safety information. (continued)

 

   

CAUTION

 

  For your safety, when this instrument is not used for a long time, 

turn the POWER switch to the O side to turn off the power to this 
instrument,  and  then  remove  the  batteries  from  this  instrument 
(remove the AC adaptor from the outlet when used). 

  Keep the AC adaptor (option) away from heaters. 

Failure to do so will melt the sheath of the adaptor cord. This may be a cause 
of an electrical shock or fire. 

  Before  moving  this  instrument,  make  sure  that  the  AC  adaptor 

(option)  is  disconnected  from  the  outlet  and  that  the  Coil  Sensor, 
BNC cable, and other external connection lines are removed.   

Failure  to  do  so  will  damage  the  AC  adaptor  cord  or  cable,  causing  an 
electrical shock, fire, or failure.   

  To use this instrument, connect it to the ground (output side). 

Ground  GND  terminals  of  monitoring  devices,  which  are  the  connection 
destination of the output terminal. 

 

Do  not  energize  a  target  to  be  measured  with  nothing  connected  to  the 
output terminal. This may be a cause of an electrical shock.   

  Pay  attention  to  the  polarity  indication  (plus  and  minus  signs) 

when placing batteries in this instrument.   

A reversely placed battery will result in battery explosion or leakage. This may 
cause a fire, injury, failure, or contamination of the surrounding environment.   

  Do not throw used batteries in the fire.   

Batteries thrown in the fire may explode, causing a fire or burn.   
For  information  on  disposing  of  used  batteries,  refer  to  “Management  of 
instrument” on page 8. 

  Before transporting this instrument, remove the batteries, house 

this  instrument  in  the  accessory  hard  case,  and  then  pack  the 
housed  instrument  in  the  packing  material  used  at  the  time  of 
purchase, or the equivalent or better.   

This  instrument  may  fail  if  a  large  vibration  or  impact  is  applied  during 
transportation, possibly causing a fire. If you do not have a proper packing or 
shock-absorbing  material  for  transportation,  contact  IWATSU  or  our  sales 
distributors. If  transportation  is to be  handled  by  a  forwarding  agent,  display 
"Contains a precision machine" on each side of the packing box. 

  For  your  safety,  remove  the  batteries  (or  the  AC  adaptor  (option) 

from the outlet), monitoring devices, and the target to be measured 
from this instrument before maintenance. In addition, wipe off with 
a dry cloth when water droplets are attached. 

If not, an electric shock or failure may occur.

 

  We  recommend  that  you  contact  IWATSU  or  our  sales 

distributors  for  periodic  inspection  and  calibration about  once  a 
year.   

Summary of Contents for SS-281A

Page 1: ...obe SS 281A H 282A H SS 283A H 284A H SS 285A H 286A H SS 287A H 288A H SS 289A H Instruction Manual Sie haben Fragen oder w nschen eine Beratung Angebotsanfrage unter 49 7121 51 50 50 oder ber info d...

Page 2: ...2015 IWATSU ELECTRIC CO LTD All rights reserved...

Page 3: ...il Current Probe 9 1 2 Features 10 1 3 Usage Example 11 Chapter 2 Names and Functions 12 2 1 Main Unit 12 2 2 Names and Functions of Main Unit 13 2 3 Rogowski Coil Sensor 14 Chapter 3 Measurement Prin...

Page 4: ...Memo...

Page 5: ...observe a warning may result in death or serious injury CAUTION Incorrect operation or failure to observe a caution may result in bodily injury or damage to the instrument Notices Some of the contents...

Page 6: ...heat due to induction heating Even if the absolute maximum di dt is within the range the coil itself is metal so induction heating causes the coil itself to generate heat which may cause smoke fire o...

Page 7: ...ng when handling the Coil Sensor Sensor cable BNC cable or AC adaptor option of this instrument If not an electric shock fire or failure may occur Do not use any of the cables or AC adaptor if damaged...

Page 8: ...power plug of a device or the AC adaptor to which this instrument is connected from the outlet Then detach this instrument from the target to be measured and do not use it Lightning may be a cause of...

Page 9: ...or less at 25 C or less Storage temperature 10 C to 60 C no dew condensation Storage humidity below the moisture amount of 80 RH Do not place this instrument in a location with excessive humidity or d...

Page 10: ...versely placed battery will result in battery explosion or leakage This may cause a fire injury failure or contamination of the surrounding environment Do not throw used batteries in the fire Batterie...

Page 11: ...nt Probe 1 Accessories See the accessories table below Accessories table Option AC adaptor UNIFIVE CO LTD Model No UNI312 0716 I P AC 100 240V 50 60Hz 0 4A Note The AC adaptor option can be purchased...

Page 12: ...ment to IWATSU or our sales distributors When sending an instrument to be repaired clearly write the instrument name serial number in the label on the rear of this instrument description of the failur...

Page 13: ...orce is proportional to a differential value of the current The output electromotive force of the Rogowski Coil is the differential waveform of the current To detect the current waveform the waveform...

Page 14: ...rty around the coil This instrument has the following specifications for details refer to Section 5 1 Specifications Frequency bandwidth fL to 30 MHz 3 dB fL Low Frequency cutoff Peak current 30 A to...

Page 15: ...a sensitivity mV A set for each main unit The converted voltage is output from the output terminal of the main unit Inputting the output voltage to an oscilloscope and other monitoring devices allows...

Page 16: ...Chapter 2 Names and Functions of Parts 12 Chapter 2 Names and Functions 2 1 Main Unit...

Page 17: ...sensor cable refer to Section 2 3 integral with the main unit is connected to this part Section 2 1 Output part BNC output connector Outputs the voltage current waveform of the main unit Section 2 1 C...

Page 18: ...on the measurement environment It does not affect the specifications of the instrument Joint box The sensor cable is secured to one end so that the Rogowski Coil forms a closed loop There is a joint h...

Page 19: ...urrent current waveform in conductors to be measured It consists of the Rogowski Coil Sensor and the main unit integrator Sections 3 1 and 3 2 in this chapter describe measurement principles and funct...

Page 20: ...ield changes with time because alternating current flows in the conductor to be measured In the Rogowski Coil magnetic flux changes along the loop When it changes an electromotive force is generated a...

Page 21: ...ut voltage of the main unit current waveform is observed by an oscilloscope and other monitoring devices through the BNC cable As expressed by the following Equation 3 3 the voltage component Vout obs...

Page 22: ...not place them in the wrong orientation c Close the lid of the battery case For the AC adaptor option a Connect the AC adaptor cable to the connector on the top of the main unit refer to in the appear...

Page 23: ...apply power to the target to be measured before the attachment 3 Place the target to be measured through the Rogowski Coil Sensor a As illustrated in Figure 4 1 release free end of Rogowski Coil from...

Page 24: ...ng the switch to the O side 5 Adjust the ZERO point of the output observed by monitoring devices a Have the included accessory Adjustment Screwdriver ready b As shown in the figure below there is a ho...

Page 25: ...e pressure The required rotation torque is less than 20 mN m If using a screwdriver other than the accessories or applying excessive pressure to ZERO ADJ of the main unit while you don t align the inc...

Page 26: ...onal and a complete ring compound because there is a connecting part in the Rogowski Coil For reference Figure 4 3 shows the position of the connection part of the Rogowski Coil The connection part of...

Page 27: ...erate heat due to induction heating Applicating this is IH s electromagnetic cooker Since the Rogowski coil has a coiled structure in which a copper wire is wound around a core material the coil itsel...

Page 28: ...eneration of corona discharge in an environment where high voltage is applied to the sensor for a long time Depending on the frequency of the applied voltage and installation conditions of the sensor...

Page 29: ...Add an error of 250 ppm C when the temperature is 10 C or less or 70 C or more Output Maximum voltage range 6 V load 100 k Output becomes 2V and sensitivity becomes about the half for 50 load Connect...

Page 30: ...rument is about 18 hours when alkaline batteries are used The LOW BATTERY LED lamp lights up when batteries are consumed About 30 minutes after the illumination this instrument will be automatically s...

Page 31: ...Chapter 5 Specifications 27 5 2 Appearance 1 Main Unit Unit mm...

Page 32: ...Chapter 5 Specifications 28 2 Rogowski Coil Sensor Unit mm...

Page 33: ...rseas Sales Sect Sales Dept No 2 Address 7 41 Kugayama 1 Chome Suginami ku Tokyo 168 8501 Japan Phone 81 3 5370 5483 Facsimile 81 3 5370 5492 URL http www iti iwatsu co jp index_e html E mail info tme...

Page 34: ...SS 281A H 282A H 283A H 284A H 285A H SS 286A H 287A H 288A H 289A H Sie haben Fragen oder w nschen eine Beratung Angebotsanfrage unter 49 7121 51 50 50 oder ber info datatec eu Distributed by...

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