Clamp-On Tester CL220 (AC/DC 300A)

Yokogawa CL220 Clamp-On AC/DC Tester Overview

  • AC/DC tester
  • Current measurements of current ranges up to 300A
  • 24mm in diameter of measurable conductor
  • Lightweight & compact design
  • Mean value display
  • Sleep function
  • Approved for conformity to safety standards EN61010-1, EN61010-2-032 (CAT. III 300 V)


Description AC/DC Mini Clamp-on
Method of detection Mean Value
Display LCD (Digital display: 3999 counts)
DC Current Range 40/300A
DC Current Resolution 0.01A
Response Time Approx. 2 second
Range Switching Auto-range
Data hold On all range
Operating temperature and humidity 0 - 40°C, 90% RH or less (no condensation)
Influence of external magnetic field 1A or less at 400 A/m
Influence of conductor position ±(2% rdg + 5dgt) or less
Safety Standard Conforms EN61010-1, EN61010-2-031, EN61010-2-032
Circuit voltage 300 Vrms or less
Withstanding voltage 3.7 kV AC for one minute
Power Supply LR-44 x 2 (3V)
SR-44 x 2
Battery Life Approx. 11 hours (continuous)
Consumed current Approx. 9 mA
Sleep Function Automatically powered down in about 5 minutes after the last switch operation
Diameter of measurable conductor 24 mm at maximum
Dimensions Approx. 59 (W) x 147 (H) x 25 (D) mm
Weight Approx. 100 g
Accessories Batteries, carrying case (93033)
User's manual (IM CL235)


Selection Guide

AC Current Range 40/300A
AC Current Resolution 0.01A
AC Current Frequency characteristics 20~1kHz
AC Current Method of detection Mean Value
AC Voltage Measurement -
DC Voltage Measurement -
Continuity Check Measurement -
Frequency Measurement -
Temperature Measurement -
Recorder output Function -
Waveform monitor output Function -
Data hold Function O
Auto hold Function -
Peak Hold Function -
Maximum value memory Function -
Mean value display Function -
Filter Function -
Range Hold Function -
Auto ZERO Adjust Function O
Auto power-off Function Δ


Additional Specification

At 23°C±5°C, 75%RH or less
Accuracy: ±( % rdg + dgt) = ±(% readout + value of least significant digit)

Parameter Reference Accuracy
DC current 40A 1.0+4
300A(±20~±200A) 1.5+4
300A(±200~±300A) 3.0
AC current 40A 1.0+4 (50/60Hz)
2.5+4 (20~1kHz)
300A(20~200A) 1.5+4 (50/60Hz)
2.5+4 (20~1kHz)
300A(200~300A) 3.5 (50/60Hz)
4.0 (20~1kHz)
Instruction Manuals

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