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IM CL255 

iii

O (None, Other) 

  Other circuits that are not directly connected to MEAINS.
Measurement category II (CAT.II)
  Local  level,  appliance,  portable  equipment  etc.,  with  smaller  transient 

over-voltages than CAT.III.

Measurement category III (CAT.III):
  Distribution  level,  fixed  installation,  with  smaller  transient  over-voltages 

than CAT.IV.

 

CAUTION

●   Always  make  sure  to  insert  each  plug  of  the  test  leads  fully  into  the 

ap-propriate terminal on the instrument.

●  Make sure to remove the test leads from the instrument before making 

current measurement.

●  Be sure to set the Function Selector switch to the "OFF" position after 

use.  When  the  instrument  will  not  be  in  use  for  a  long  period  of  time, 
Place it in storage after removing the battery.

●  Use a damp cloth and detergent for cleaning the instrument. Do not use 

abrasives or solvents.

NOTE

●  Radiation immunity affects the accuracy of CL255 testers under the con-

ditions specified in EN 61000-4-3.

●  If  equipment  generating  strong  electromagnetic  interference  is  located 

nearly, the testers may malfunction.

Summary of Contents for CL255

Page 1: ...IM CL255 2018 6 12 KYOU IM CL255 User s Manual CL255 Clamp on Tester...

Page 2: ...Voltage Measurement 7 2 6 Resistance Measurement 8 2 7 Continuity Check 400 range fixed 8 2 8 Frequency Measurement 9 2 9 Peak Measurement 10 2 10 Average Measurement 11 3 Other Functions 12 3 1 Sleep...

Page 3: ...anual in order to avoid the risk of personal injury or death and or damage to the instrument Double Insulation This symbol indicates double insulation AC Voltage Current This symbol indicates AC volta...

Page 4: ...d to the circuit under test Do not install substitute parts or make any modification to the instrument Return the instrument to Yokogawa Meters Instruments or your distributor for repair or re calibra...

Page 5: ...iate terminal on the instrument Make sure to remove the test leads from the instrument before making current measurement Be sure to set the Function Selector switch to the OFF position after use When...

Page 6: ...n 4 Data Hold Button Freezes the display reading is shown on the display when Data Hold is enabled Note When the plug is inserted into the output terminal Data Hold Switch operates as range selection...

Page 7: ...the selected function and measuring mode 8 Terminal Cover Slides over Hi and Lo Terminals to prevent access to them when OUTPUT terminal is in use 9 OUTPUT Terminal For AC or DC current range only Pro...

Page 8: ...slipping off the hand during use 13 Test Leads Model 98072 Connected to Lo and Hi terminals for voltage or resistance measurement 14 Barrier It is a part providing protection against electrical shock...

Page 9: ...r equipment under test Do not make current measurement with the test leads connected to the Hi and Lo terminals Keep your fingers and hands behind the barrier during measurement 1 Set the Function Sel...

Page 10: ...o a position other than DCA cancels the zero adjustment 2 3 AC Current Measurement WARNING Never use the instrument on a circuit above 750VAC This may cause electrical shock hazard and damage to the i...

Page 11: ...ING Never use the instrument on a circuit above 1000VDC This may cause electrical shock hazard and damage to the instrument or the circuit under test Keep your fingers and hands behind the barrier dur...

Page 12: ...shown on the upper left corner of the display 2 Slide the terminal cover to the left to disclose the Hi and Lo terminals Plug the red test lead into Hi terminal and the black test lead into the Lo ter...

Page 13: ...leads to the circuit under test and take the reading on the display 2 7 Continuity Check 400 range fixed The continuity check mode is enabled by pressing the button on resistance range and is indicate...

Page 14: ...ns that measurement cannot be made Because range is fixed at 400V for AC voltage and at 400A for AC current WARNING Never use the instrument on a high voltage circuit above 750VAC This may cause elect...

Page 15: ...plugged into the instru ment 1 The PEAK mode is available on DCA ACA DCV and DCA ranges Set the Function Selector switch to the A A V or V position Note Only on DCA range press the button for about o...

Page 16: ...tion Selector switch to the A A V or V position 2 Press the button once to enter from the normal mode to the Average mode should be indicated on the display 3 Follow instructions for ACV DCV ACA or DC...

Page 17: ...disabled in the PEAK measurement mode 3 2 Data Hold Function This is a function used to freeze the measured value on the display Press the Data Hold button to freeze the reading The reading will be he...

Page 18: ...Switch Data Hold Switch OFF 400A range Data Hold Switch ON 2000A range NOTE After measurement be sure to return Data Hold switch to OFF position 1 Attach the output plug cable sold separately 98076 o...

Page 19: ...e of the OUTPUT terminal use an Alkaline battery which will extend continuous recording time up to about 24 hours 3 5 Optional Accessories Clamp Adapter Model 99025 For AC current measurement only The...

Page 20: ...If the battery voltage becomes too low for the instrument to operate normally is shown on the display Then replace the battery Note that when the battery is completely exhausted the display blanks wi...

Page 21: ...ranging Accuracy 5 0 to 399 9A 1 5 rdg 3dgt 50 60Hz 3 0 rdg 4dgt 30 to 1kHz 150 to 1700A 1701 to 2000A 3 5 rdg 3dgt 50 60Hz Conversion method AC coupled true rms responding calibrated to the rms Auto...

Page 22: ...nce Measuring Range Auto ranging Accuracy 0 to 399 9 1 5 rdg 2dgt 150 to 3999 Auto ranging Lo 0 to 399 9 Shifts to Hi at 400 0 Hi 150 to 3999 Shifts to Lo at 149 At 4000 or above OL is shown Continuit...

Page 23: ...clamp meter is re sponding to the average value The calibration is done with a conversion factor of 1 111 for sine wave which is found by dividing the effective value by the average value These instr...

Page 24: ...n Approx 15mA max Sleep function Automatically powered down in Approx 30 minutes after the last switch operation power consumption Approx 200 A Withstanding Voltage 6300V AC 50 60Hz for 5sec between e...

Page 25: ...fails to operate correctly and needs repair contact the vendor from whom you purchased the instrument or the nearest Yokogawa Meters Instruments sales office Turn off the POWER switch once then turn...

Page 26: ...IM CL255 21 This manual is valid only in China GB T 26572 GB T 26572...

Page 27: ......

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