CL320 Series, (0-20mA-200A)
Clamp-on Leakage Testers

Leakage clamp-on meters capable of measuring up to 200AAC
(for conductors up to 24 mm in diameter)
Yokogawa CL320 Clamp-on Meters
  • Leakage current measurement with current range from 20mA to 200A
  • Light weight and compact design
  • Manual range switching and auto power-off functions
  • 24mm in diameter of measurable conductor
  • Mean value display
  • Auto power-off
  • Manual range switching
  • Approved for conformity to safety standards EN61010-1, EN61010-2-032(CAT. III 300 V)

* All Clamp-on Meters include Test Leads (where applicable) and a carrying case

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  • Preventative maintenance
  • Testing for current leakage on branch circuits
  • Measuring current draw of motors and motor control circuits
  • Measuring Loads


Yokogawa offers an inexpensive dedicated Clamp-on meter that allows you to measure from 20mAAC to 200AAC with a wide frequency response range. The CL320 is ideal for non-evasive electrical safety testing, measuring leakage current tests without powering down or disconnecting equipment – saving you time, without compromising on quality or safety.

The unique jaw design eliminates the influence of adjacent conductors or magnetic fields. This allows you to perform accurate and reliable tests in today’s crowded electrical environments. The tough and high-quality jaw design of the Fluke 360 leakage tester guarantees high stability for long-term repeatability and durability.

  • Literature
  • Specifications
Literature and Technical Information
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Clamp-on Meters – Portable Test Instruments

++ CL320 Clamp-on Meters| Specification sheet
Model: Yokogawa CL320 Clamp-on Meters
Display LCD (Digital display: 1999 counts)
Current Range 20/200mA,200A
Current Resolution 0.01mA
Ac Frequency Characteristics 40~400Hz
Specific Accuracies
Accuracy (20mA/200mA): 2.0+4 (50/60Hz)
Accuracy 200A (0~100A): 5.0+6 (40~400Hz)
Accuracy 200A (100.1~200A): 5.0+4 (50/60Hz)
Accuracy (20mA/200mA): 3.0+5 (50/60Hz)
200A(0~100A) 3.0+5 (50/60Hz)
200A(100.1~200A) 5.0+5 (50/60Hz)
General specifications
Method of detection Mean value
Response Time Approx. 2 seconds
Range Switching Manual-range
Data Hold On all range
Influence of external magnetic field 10 mA or less in proximity to a 14.4 mm-dia conductor carrying 100A
Influence of conductor position Within 5 dgt for 0 to 50A, or 2% for 50 to 200A (10 mm-dia conductor at inside the jaw)
Influence of Residual Current 10 mA or less in proximity to a 10 mm-dia conductor carrying 50A
Safety Standard Conforms EN61010-1, EN61010-2-032
Circuit Voltage 300Vrms or less
Withstanding Voltage 3.7kV AC for one minute
Auto power-off Approx. 10 minutes
Diameter of measurable
24mm at maximum
Operating Temp.: 0 – 40°C
Relative Humidity: 85% (non condensing)
Dimensions Approx. 60 (W) x 149 (H) x 26 (D) mm
Weight Approx. 120 g
Accessories Batteries, carrying case (93033)
User’s manual (IM CL320)
Power Supply LR-44 x2(3V) or SR-44 x2
Battery Life Approx. 100 hours (continuous)
Consumed Current Approx. 9 mA