Hioki 3270 Instruction Manual
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Hioki 3270 Instruction Manual

Hioki 3270 Instruction Manual

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INSTRUCTION MANUAL
For...は専用機種。複数の場合は「/」で区切る。
不要の場合はとる。
形名を入力。 複数の場合は「/」で区切る。
3270
品名を入力。
CURRENT MONITOR

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  • Page 1 INSTRUCTION MANUAL For...は専用機種。複数の場合は「/」で区切る。 不要の場合はとる。 形名を入力。 複数の場合は「/」で区切る。 3270 品名を入力。 CURRENT MONITOR...

  • Page 3: Table Of Contents

    Contents Introduction Notes on Safety Inspection Precautions Chapter 1 3270 Current Monitor 1.1 Product Overview 1.2 Identification of Indicators 1.3 Product Specifications 1.4 Measurement Procedure 1.4.1 Preparation 1.4.2 Measurement 1.4.2.1 When Using the 9273 1.4.2.2 When Using the 9274 1.4.2.3 When Using the 9275 1.4.2.4 When Using the 9276...
  • Page 4 Chapter 4 9275 Clamp-On AC Sensor 4.1 Product Specifications Chapter 5 9276 Clamp-On AC/DC Sensor 5.1 Product Specifications...

  • Page 5: Introduction

    Introduction Thank you for purchasing this Hioki 3270 Current Monitor. In order to use this product effectively and to ensure that it enjoys a long operational life, read this Instruction Manual carefully and then retain it for future reference. Notes on Safety...
  • Page 6 Safety Symbols This Instruction Manual provides information and warnings essential for operating this equipment in a safe manner and for maintaining it in safe operating condition. Before using this equipment, be sure to carefully read the following safety notes. This symbol is affixed to locations on the equipment where the operator should consult corresponding topics in this manual (which are also marked with the symbol) before using relevant functions of the...

  • Page 7: Inspection

    In particular, check the accessories, panel switches, and connectors. If the unit is damaged, or fails to operate according to the specifications, contact your dealer or Hioki representative. Precautions In order to ensure safe operation and to obtain maximum performance from the unit, observe the cautions listed below.
  • Page 8 • When the power for the 3270 is on, keep the core section of the sensor closed, except when clamping them onto the conductor to be measured. (The facing surface of the core section can be scratched while it is open.)

  • Page 9: Chapter 1 3270 Current Monitor

    9273, 9274, 9275, and 9276 clamp-on sensors. When used in conjunction with any of the four sensors and connected to a recorder, oscilloscope, etc., this unit can be used to easily record and monitor current waveforms. Chapter 1 3270 Current Monitor...

  • Page 10: Identification Of Indicators

    9273, 9274, 9275, 9276 Compatible sensors ♦ Output voltage 1 V/range (front: Johnson terminals; rear: BNC terminal) ♦ Measurement ranges 0.1/0.2/0.5/1/2/5/10 A (when using the 9273 or 9274) 1/2/5/10/20/50/100 A (when using the 9275 or 9276) Chapter 1 3270 Current Monitor...
  • Page 11 1500 V AC for one minute (between power supply and case, and between power supply and output terminal) ♦ Insulation resistance 500 V DC, 100 MΩ or more (between power supply and case, and between power supply and output terminal) Chapter 1 3270 Current Monitor...
  • Page 12 (F1.0 A/250 V, 20 mm X 5 mm dia., in the fuse holder), 9177 Output cord At range f.s. input Coupling : DC Coupling : AC Frequency (Hz) Figure 1 Frequency Band (example of characteristics) Chapter 1 3270 Current Monitor...

  • Page 13: Measurement Procedure

    (4) Connect the output terminal on the unit and the input terminal of the measuring equipment, such as a recorder. (When using an oscilloscope, make the connections so that the GND terminal for the probe is connected to the L output terminal.) Chapter 1 3270 Current Monitor...

  • Page 14: Measurement

    • Be sure to press only one range switch; avoid having none of the LEDs that indicate the range lit, or having two or more lit at the same time. Chapter 1 3270 Current Monitor...

  • Page 15: When Using The 9273

    Core section Sensor connector Figure 2 9273 Identification of Indicators (1) Select both ranges of the 3270 and the measuring equipment according to the input current value. (Refer to Table 1 in Section 1.4.3.3.) (2) Set the coupling switch to AC.
  • Page 16 (However, a small amount of fluctuation will remain.) • Accurate measurements are not possible when measuring overlapping DC components of several amperes or more. • The zero adjustment dial does not function. Chapter 1 3270 Current Monitor...

  • Page 17: When Using The 9274

    Core section Sensor connector Figure 3 9274 Identification of Indicators (1) Select both ranges of the 3270 and the measuring equipment according to the input current value. (Refer to Table 1 in Section 1.4.3.3.) (2) Set the coupling switch to DC.
  • Page 18 AC, then components below the respective cutoff frequencies will be attenuated. • Immediately after powering on, there may in some cases be a large offset drift caused by self-generated heat from this unit and the sensor. Chapter 1 3270 Current Monitor...
  • Page 19 1. Press the demagnetizing switch of the 3270. 2. Open and close the sensor head clamps two or three times. 3. Turn the zero adjustment dial of the 3270 to zero the output voltage. Chapter 1 3270 Current Monitor...

  • Page 20: When Using The 9275

    Core section Sensor connector Figure 4 9275 Identification of Indicators (1) Select both ranges of the 3270 and the measuring equipment according to the input current value. (Refer to Table 2 in Section 1.4.3.3.) (2) Set the coupling switch to AC.
  • Page 21 • If the demagnetizing switch is pressed during measurement, the output changes for approximately 1 second, but afterwards the measured value is not affected. (The demagnetizing function is not used when an AC sensor is connected.) Chapter 1 3270 Current Monitor...

  • Page 22: When Using The 9276

    Core section Sensor connector Figure 5 9276 Identification of Indicators (1) Select both ranges of the 3270 and the measuring equipment according to the input current value. (Refer to Table 2 in Section 1.4.3.3.) (2) Set the coupling switch to DC.
  • Page 23 If you change the range, be sure to perform the zero adjustment again. • Perform the zero adjustment when there is no input and after performing demagnetizing. (The coupling setting must also be set to DC coupling.) Chapter 1 3270 Current Monitor...

  • Page 24: Explanation Of Each Function

    Front: Johnson terminals (connect a shielded cord) Rear: BNC terminal The output resistance is approximately 50 Ω. . In order to prevent malfunctions, do not short the output CAUTION terminal or input voltage to them. Chapter 1 3270 Current Monitor...

  • Page 25: Measurement Ranges

    (such as a recorder) being used. (Refer to Tables 1 and 2.) Be sure to press only one range switch; avoid having CAUTION none of the LEDs that indicate the range lit, or having two or more lit at the same time. Chapter 1 3270 Current Monitor...
  • Page 26 0.2 A 0.4 A 1 A range 0.01 A 0.02 A 0.05 A 0.1 A 0.2 A 0.5 A *The values indicate the current value per DIV of the measuring equipment, such as a recorder. Chapter 1 3270 Current Monitor...

  • Page 27: Demagnetizing (Demag)

    (Perform zero adjustment while there is no input.) Zero adjustment is performed in order to compensate for the offset voltage values of the unit and the sensors and for the drift of those values caused by the temperature. Chapter 1 3270 Current Monitor...

  • Page 28: Coupling (Coupling)

    Pressing the coupling switch sets the coupling to AC. (The LED lights.) 1.4.3.7 Filter (FILTER) Use the filter to eliminate noise and other high-frequency components. (The cutoff frequency is approximately 100 kHz.) Pressing the filter switch turns the filter on. (The LED lights.) Chapter 1 3270 Current Monitor...

  • Page 29: Overload Indicator (Overload)

    100 V, 120 V : F1.0 A/250 V 20 mm X 5 mm dia. 220 V, 240 V : F0.5 A/250 V 20 mm X 5 mm dia. Chapter 1 3270 Current Monitor...
  • Page 30 1. Unplug the power cord. 2. Remove the fuse holder, check the fuse and then replace. Power cord Spare fuse Fuse holder Figure 6 Fuse Replacement Chapter 1 3270 Current Monitor...

  • Page 31: Chapter 2 9273 Clamp-On Ac Sensor

    Chapter 2 9273 Clamp-On AC Sensor 2.1 Product Specifications (Accuracy is guaranteed at 23° C ± 3°C after the power has been on for 30 minutes) ♦ Rated current 20 A AC ♦ Output voltage 2 V AC/20 A AC 50 Ω...
  • Page 32 ± 12 V ± 1 V ♦ Supply voltage ♦ Operating temperature 0 to 40°C , 80 % RH or less (no condensation) and humidity ♦ Storage temperature 10 to 50°C , 80 % RH or less and humidity (no condensation) ♦...
  • Page 33 Frequency (Hz) Figure 7 9273 Input Impedance Frequency (Hz) Figure 8 9273 Maximum Input Range Amplitude Amplitude (dB, 0dB=1 V) Phase Frequency (Hz) Figure 9 9273 Frequency Band (example of characteristics) Chapter 2 9273 Clamp-On AC Sensor...
  • Page 34 Chapter 2 9273 Clamp-On AC Sensor...

  • Page 35: Chapter 3 9274 Clamp-On Ac/Dc Sensor

    Chapter 3 9274 Clamp-On AC/DC Sensor 3.1 Product Specifications (Accuracy is guaranteed at 23 ° C ± 3 °C after the power has been on for 30 minutes) ♦ 20 A (AC+DC) Rated current ♦ Output voltage 2 V /20 A (AC+DC) 50 Ω...
  • Page 36 ♦ Power consumption 1.5 VA max. (with rated input) ± 12 V ± 1 V ♦ Supply voltage Operating temperature 0 to 40 ° C, 80 % RH or less ♦ and humidity (no condensation) 10 to 50 ° C, 80 % RH or less ♦...
  • Page 37 Frequency (Hz) Figure 10 9274 Input Impedance Frequency (Hz) Figure 11 9274 Maximum Input Range Amplitude Amplitude (dB, 0dB=1 V) Phase Frequency (Hz) Figure 12 9274 Frequency Band (example of characteristics) Chapter 3 9274 Clamp-On AC/DC Sensor...
  • Page 38 Chapter 3 9274 Clamp-On AC/DC Sensor...
  • Page 39 Chapter 4 9275 Clamp-On AC Sensor 4.1 Product Specifications (Accuracy is guaranteed at 23° C ± 3°C after the power has been on for 30 minutes) ♦ Rated current 150 A AC ♦ Output voltage 1.5 V AC/150 A AC 50 Ω...
  • Page 40 ♦ Power consumption 2 VA max. (with rated input) ± 12 V ± 1 V ♦ Supply voltage ♦ Operating temperature 0 to 40°C , 80 % RH or less and humidity (no condensation) ♦ Storage temperature -10 to 50°C , 80 % RH or less and humidity (no condensation) ♦...
  • Page 41 Frequency (Hz) Figure 13 9275 Input Impedance Frequency (Hz) Figure 14 9275 Maximum Input Range Phase Amplitude Frequency (Hz) Figure 15 9275 Frequency Band (Example of Characteristics) Chapter 4 9275 Clamp-On AC Sensor...
  • Page 42 Chapter 4 9275 Clamp-On AC Sensor...
  • Page 43 Chapter 5 9276 Clamp-On AC/DC Sensor 5.1 Product Specifications (Accuracy is guaranteed at 23° C ± 3°C after the power has been on for 30 minutes) ♦ 150 A (AC+DC) Rated current ♦ Output voltage 1.5 V /150 A (AC+DC) 50 Ω...
  • Page 44 ♦ Noise 1 mV rms or less (with a voltmeter for up to 20 MHz) ♦ 2 VA max. (with rated input) Power consumption ± 12 V ± 1 V ♦ Supply voltage ♦ Operating temperature 0 to 40°C , 80 % RH or less and humidity (no condensation) ♦...
  • Page 45 Frequency (Hz) Figure 16 9276 Input Impedance Frequency (Hz) Figure 17 9276 Maximum Input Range Phase Amplitude Frequency (Hz) Figure 18 9276 Frequency Band (example of characteristics) Chapter 5 9276 Clamp-On AC/DC Sensor...
  • Page 46 Chapter 5 9276 Clamp-On AC/DC Sensor...

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