Model CL345, (40mA-400A),
True RMS AC Current Clamp-on Meters

Clamp-on meters capable of measuring up to 400AAC
(for conductors up to 40 mm in diameter) – ideal for current leakage detection
Yokogawa CL345 Clamp-on Meters
  • 3 3/4 digit LCD display
  • Mean value display
  • Leakage current measurement with current range from 40mA to 400A
  • Manual range switching and auto power-off functions
  • 40mm in diameter of measurable conductor
  • True RMS
  • 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


Model CL345 true RMS Clamp-on tester provides an easy-to read, 3999 count display. The CL345 is able to measure current with noise or harmonics from 40 mA to 400 AAC .  It is an inexpensive, accurate and robust dedicated leakage meter with a mid-size clamp diameter  that accepts conductors up to 44 mm diameter.
  • Literature
  • Specifications
Literature and Technical Information
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Clamp-on Meters – Portable Test Instruments

++ CL345 Clamp-on Meters| Specification sheet
Model: Yokogawa CL345 Clamp-on Meters
Display LCD (Digital display: 3999 counts)
Specific Accuracies
40mA/400mA 2.5+10 (20~1kHz)
1.0+5 (50/60Hz)
400A(0~350A) 2.5+10 (40~1kHz)
1.0+5 (50/60Hz)
400A(0~350A) 5.0 (40~1kHz)
2.0 (50/60Hz)
General specifications
Method of detection True RMS
Response Time Approx. 2 seconds
Range Switching Manual-range
Data Hold On all range
Peak Hold On all range
Influence of external magnetic field 10 mA or less in proximity to a 15 mm-diameter conductor carrying 100A
Influence of conductor position 40/400 mA range: Within 5 dgt at every part inside the jaw 400A range,
0 to 250A:Within ±0.5% rdg ±5 dgt at every part inside the jaw section
Influence of Residual Current 12 mA or less in proximity to a 10 mm- diameter conductor carrying 100A
Safety Standard Conforms EN61010-1, EN61010-2-032
Influence of Residual Current 12 mA or less in proximity to a 10 mm – diameter conductor carrying 100A
Circuit Voltage 300 Vrms or less
Withstanding Voltage 5.55kV AC for one minute
Auto power-off Approx. 10 minutes
Diameter of measurable
40 mm at maximum
Operating temperature: 0 – 40°C
Relative Humidity: 90% RH or less (no condensation)
Dimensions Approx. 81 (W) x 185 (H) x 40 (D) mm
Weight Approx. 270g
Accessories Batteries, carrying case (93030)
User’s manual (IM CL345)
Power Supply LR03 x 2
R0-3(UM-4) x 2
Battery Life Approx. 40 hours (continuous)
Consumed Current Approx. 13 mA