Hioki Universal Clamp on CT 9277, 9278

High Precision DC to 100 kHz/20A and 200A AC/DC Current Sensor with ±0.5% Accuracy

Hioki AC/DC clamp sensors are best-in-class devices for use with power meters, Memory HiCorders and high performance oscilloscopes. The 9277 and 9278 are DC to 100 kHz/20A and 200A sensors, ideal for monitoring waveforms of switching power supplies, inverters, power conditioners, etc.

Models 9277 and 9278 cannot be used alone. The 9555-10 Sensor Unit must be used when connecting the probe with a Hioki Memory HiCorder. Models 9277 and 9278 can be connected directly to Models 3193, 3193-10, 3194 and 3390 power measuring devices.

Wide DC to 100 kHz frequency bandwidth
• Minimal zero drift for stable, long-term measurements
• For power lines and secondary side of inverters
• 50A (9277) and 350A (9278) of continuous input
• Use together with the SENSOR UNIT 9555-10 for high precision waveform monitoring and recording
• Also pair with AC/DC clamp on power meters

Basic specifications (Accuracy guaranteed for 1 year)

  9277 9277
Rated current 20 A AC/DC 200 A AC/DC
Continuous allowable input 50 A rms 350 A rms
Amplitude accuracy ±0.5 % rdg. ±0.05 % f.s. (DC and 45 to 66 Hz, 30 min or more warming-up after degaussing)
Phase accuracy ±0.2° (45 to 66 Hz, 30 min or more warming-up after degaussing)
Frequency characteristics (Amplitude/Phase, deviation from accuracy) DC to 1 kHz: ±1.0 % (±0.5°)
1 k to 50 kHz: ±2.5 % (±2.5°)
50 k to 100 kHz: ±5.0 % (±5.0°)
Output rate (Via the 9555-10) 2 V/Rated current
(voltage output with the Sensor Unit 9555-10, use with a device having a 1 MΩ input resistance or higher)
Max. rated voltage to earth 600 V CAT II, 300 V CAT III
Core diameter φ 20 mm (0.79 in)
Supply consumption 3.6 W (with rated input) 7.2 W (with rated input)
Power supply ±12 V to ±15 V (Power suppled via the 9555-10, 9555-10 requirement with 100 to 240 V AC)
Dimensions and mass 176 mm (6.93 in) W × 69 mm (2.72 in) H × 27 mm (1.06 in) D, 470 g (16.6 oz), cord length: 3 m(9.84 ft)
Accessories Carrying case 9375 ×1, Instruction manual ×1, Mark-band ×6
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