Yokogawa 30032A 1mA/60A Leakage Current Clamp-On meters


  • Yokogawa 30032A can measure leakage currents of 1 mA, which is useful for checking the insulation of low-voltage circuits and electrical components.
  • Can measure a broad range of currents from leakage currents (at a resolution of 0.001 mA) to load currents up to 60 A.
  • Typical influence (on the current value of an adjacent cable) from an external magnetic field is 0.0005%.
  • Durability of clamp: More than 50,000 opening/closing events
  • Twice the tensional strength of Yokogawa M&C’s earlier model clamps
  • The clamp lever is lengthened by 30%, enabling smooth opening/closing of the clamp even for thick cables of 40mm in diameter.
  • Approved for conformity to safety standards EN 61010-1 and EN 61010-2-032 (CAT III 300V, pollution degree2)
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SKU: Yokogawa 30032A Categories: , Tags: ,


Harmonic Filter Function (Available in the 30032A)

1. What is a Harmonic?

Harmonic refers to sinusoidal quantity having a frequency that is an integral multiple of the fundamental frequency (for example, the commercial frequency). When a harmonic is superimposed on the fundamental frequency, the waveform is distorted.
2. Why is it Necessary to Accurately Measure the Leakage Current of the Fundamental Frequency (Commercial Frequency)?

One problem when measuring the leakage current to check the isolation of electrical circuits in power distribution equipment is that the electrical isolation cannot be correctly understood due to the influence of a harmonic current. That is, the leakage current flowing from the electrical circuit to ground is very small so that, in order to check the isolation of electrical circuits by means of the leakage current, it is necessary to remove the harmonic component of the leak current and measure only the current of the fundamental frequency (commercial frequency).
3. The 30032A Employs a Harmonic Filter

Conventional leakage clamp-on testers could not sufficiently remove harmonic current components so measured leakage current values were often larger than the specified value due to the influence of a harmonic current. In this case, retesting with an insulation tester was required, resulting in increased effort and cost for the test. Under these circumstances, Yokogawa Meters & Instruments Corporation has developed the leakage clamp-on tester 30032A, which employs a high-performance harmonic filter that can accurately measure just the fundamental frequency component of the leakage current.


Yokogawa 30032A General Specifications
Method of Detection Mean Value
Diameter of Measurable conductor ±40MM at maximum
Display LCD Digital Display: 3200 Counts
Bar-graph Display: 32 Segments
“OL” over-range indication
Yokogawa-30031A-batt Low-battery symbol
Yokogawa-30031A-DH Data hold symbol
Measurement Cycle Digital Display: 2 times/Seconds
Bar-Graph Display: 12 times/second
Range Switching Auto-Range
Data Hold On All range
Ambient Temperature and Humidity 0-50°C, 85% RH or less (no condensation)
Temperature coefficient 0.05% of range/°C or less (within the ranges of 0-18°C and 25-50°C for measurement of 0-50A)
Influence of external Magnetic Field 0.0005% typical*1 (on current value of adjacent cable)
Influence of Conductor Position Within Accuracy
Circuit Voltage 300Vrms or less
Withstanding Voltage 3.7kV AC for one minute
Power Supply CR2032 (coin-shaped) 3V x1
Battery Life Approx. 90 hours (continuous use)
Auto Power-off Approx. 10 Minutes
Dimensions Approx. 70(W)x176(H)x25(D)mm
Weight Approx. 200g
AC current measurement
Filter function OFF
Accuracy: ± (% of reading + digits)
Range Resolution Accuracy Maximum
Allowable Current
3mA 0.001mA 0.010 < I ≤32.70mA:
30mA 0.01mA 32.70mA
30A 0.01A 0.05 < I ≤50.0A:1.0%+5
50.0 < I ≤60.6A:5.0%+5
60A 0.1A 60.6A
Filter function ON
3mA 0.001mA 0.010 < I ≤32.70mA:
30mA 0.01mA 32.70mA
30A 0.01A 0.05 < I ≤50.0A:1.5%+5
50.0 < I ≤60.6A:5.5%+5
60A 0.1A 60.6A
Note: Input current of 2nd-order and higher harmonics
: 150 mA rms maximum in the 3 mA/30 mA range
: 62 A rms maximum in the 30 A/60 A range
Filter specifications (3 mA and 30 mA ranges and 30 A and 60 A ranges)
Amplitude ratio at 100 Hz: -38 dB (1.26%) or less (typical: -41 dB)
Amplitude ratio at 120 Hz: -53 dB (0.22%) or less (typical: -56 dB)
Zero correction
3 mA range: Displays 0.000 mA (zero) when 0.010 mA < I
30 A range: Displays 0.00 A (zero) when 0.05 A < I



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