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Hioki CM4373 - User Manual

Hioki CM4373
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EN
AC/DC CLAMP METER
Instruction Manual
June 2016 Revised edition 2
CM4371A961-02 16-06H
CM4371
CM4372
CM4373
CM4374
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Table of Contents

Questions and Answers

  • B
    Barbara DelgadoAug 8, 2025
    What to do if Hioki Measuring Instruments indicate abnormal current value?
    • L
      lewisgloriaAug 8, 2025
      If your Hioki Measuring Instruments are showing an abnormal current value, consider these potential causes and solutions: * If the measured current is too small for the instrument’s range, try wrapping the wire around the clamp sensor multiple times. * Ensure the tips of the clamp sensor’s jaws are closed. * If the clamp sensor is damaged, send the instrument in for repair.
  • C
    Chad CollinsAug 17, 2025
    Why Hioki CM4373 Measuring Instruments show abnormal current measurement?
    • S
      sjohnsonAug 18, 2025
      An abnormal current measurement on your Hioki Measuring Instruments could be due to several reasons: * The measured current value might be too small for the instrument’s measurement range. * The clamp sensor’s jaws might be open. * The clamp sensor could be damaged. In this case, send the instrument for repair.
  • A
    April GeorgeAug 27, 2025
    How to fix abnormal current readings on Hioki CM4373?
    • L
      lesliehillAug 27, 2025
      To resolve abnormal current readings on Hioki Measuring Instruments: * If the measured current is too small, wrap the wire around the clamp sensor multiple times. * Make sure that the tips of the clamp sensor’s jaws are fully closed. * If you suspect the clamp sensor is damaged, the instrument may need to be sent in for repair.

Summary

Safety Notes

DANGER

Warns about potential injury or death due to mishandling and the need to understand instructions.

Protective Gear Warning

Advises using insulated protective wear like gloves and boots and a safety helmet for electrical work.

Usage Notes

Exceeding Measurement Ranges Danger

Warns against exceeding measurement ranges, which can damage the instrument or cause injury.

Wet Conditions Warning

Warns against getting the instrument wet or using it with wet hands to avoid electric shock.

Insert;Replace Batteries

Inspection Before Measurement

Pre-measurement Checks

Current Measurement

Manual Hold; Auto Hold

Switching Ranges

Filter Function

MAX;MIN;AVG;PEAK Measurement

Measuring MAX;MIN;AVG;PEAK Values

Simultaneous DC Current;Voltage Peak Values

Rush Current (INRUSH) Measurement

Measuring Rush Current

Other Measurement Functions

Bluetooth Communications (CM4372, CM4374)

Installing GENNECT Cross App

Pairing App with Clamp Meter

Details the steps for pairing the GENNECT Cross app with the clamp meter.

Repairs, Inspections, and Cleaning

Troubleshooting Instrument Issues

Lists common symptoms and their verification or solution steps for troubleshooting.

Understanding Error Displays

Lists common error codes displayed by the instrument and their corresponding solutions.

Specifications

Accuracy Specifications and Measurement

Details guaranteed accuracy periods, temperature/humidity effects, and measurement methods.

Accuracy Table

AC Current Accuracy Details

Lists accuracy for AC current measurements across different ranges and frequency conditions.

DC Voltage Accuracy Details

Hioki CM4373 Specifications

General IconGeneral
ModelCM4373
CategoryClamp Meter
True RMSYes
BluetoothYes
ContinuityYes
DiodeYes
DisplayLCD
Safety StandardsCAT IV 600 V, CAT III 1000 V
TypeDigital
AC Voltage1000 V
DC Voltage1000 V
Resistance60.00 MΩ
Operating Temperature-25 °C to 65 °C
Power Supply2 x AA batteries

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