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The Model JM861 is designed for oscilloscopes, waveform displaying instruments and other instruments able to benefit from its frequency response. The Model JM861 encompasses a special circuit and three ranges to maximize frequency response performance. Accurately measures AC current waveforms and has proportional mV output for direct readings on oscilloscopes. Three-position slide switch on the handle selects ranges. Large jaw window enables use on cables and bus bars.
| ELECTRICAL | |
| Nominal Range | 30A, 300A, 3000A |
| Measurement Range | 90A, 900A, 9000A Peak |
| Transformation Ratio | Voltage output |
| Output Signal | 10mVAC/AAC (0.3V @ 30A) 1mVAC/AAC (0.3V @ 300A) 0.1mVAC/AAC (0.3V @ 3000A) |
| Accuracy (30A Range) | |
| 1.5A | 2% of Reading ± 1mV |
| 6A | 2% of Reading ± 1mV |
| 30A | 2% of Reading ± 1mV |
| Phase Shift (30A Range) | |
| 1.5A | 20° |
| 6A | 10° |
| 30A | 5° |
| Accuracy (300A Range) | |
| 15A | 2% of Reading ± 0.5mV |
| 60A | 2% of Reading ± 0.5mV |
| 300A | 2% of Reading ± 0.5mV |
| Phase Shift (300 A Range) | |
| 15A | 3° |
| 60A | 1.5° |
| 300A | 1° |
| Accuracy (3000A Range) | |
| 150A | 2% of Reading ± 0.2mV |
| 600A | 2% of Reading ± 0.2mV |
| 3000A | 2% of Reading ± 0.2mV |
| Phase Shift (3000A Range) | |
| 150A | 3° |
| 600A | 1.5° |
| 3000A | 1° |
| Overload | – |
| Frequency Range | 10 to 50kHz; current derating above 5kHz for continuous use |
| Load Impedance | 1MΩ, 47pF |
| Working/Common Mode Voltage | 600VAC |
| Output Termination | 6.5 ft coaxial cable |
| MECHANICAL | |
| Operating Temperature | 14° to 122°F (-10° to 50°C) |
| Storage Temperature | -13° to 176°F (-25° to 80°C) |
| Jaw Opening | 3.54" (90mm) |
| Maximum Conductor Size | Cable: 2.52" Ø max (64mm); Bus bar: 1.97 x 5.31" (50 x 135mm); 2.52 x 3.94" (64 x 100mm) |
| Dimensions | 4.72 x 12.40 x 1.89" (120 x 315 x 48mm) |
| Weight | 2.65 lbs (1200g) |
| Polycarbonate Material | Handles: 10% fiberglass charged polycarbonate UL94 VO; Jaws: ABS UL V2 |
| SAFETY | |
| Electrical | EN61010-2-32 |
| Electromagnetic Compatibility | EN 50081-1 Class B; EN 50082-2 Electrostatic discharge IEC 1000-4-2; Radiated field IEC 1000-4-3; Fast transients IEC 1000-4-4; Magnetic field at 50/60Hz IEC 1000-4-4 |
| Double Insulation | Yes |
| CE Mark | Yes |
Note: Reference conditions: 23°C ± 3°K, 20 to 85% RH, 48 to 65Hz, external magnetic field <40A/m, no DC component, no external current carrying conductor, test sample centered, load impedance ≥ 1nΩ, 47pF.
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