500 A AC/DC Wideband and High-Precision Current
Probe for Power Efficiency Testing

Hioki AC/DC clamp sensors are best-in-class current sensors
for use with power meters, Memory HiCorders and high performance
oscilloscopes. The CT6845 is a high-precision 500 A AC/DC current
probe that features a wide operating temperature range and large
jaw diameter, making them ideal for evaluating the operational
integrity of devices that are subject to extreme temperature ranges.

Model No. (Order Code)

CT6484500 A AC/DC, PL23 terminal
CT6484-05500 A AC/DC, ME15W terminal

Note: These products cannot be used alone.
The optional SENSOR UNIT is required in order
to supply power and connect the clamp to a
Memory HiCorder or other instrument.
Products can be directly connected to the
compatible Power Meters and Power Analyzers.

Key Features

• Ideal for use in environmental testing with broad -40˚C to 85˚C temperature range
• High precision with a clamp-type design, ±0.3% amplitude accuracy, ±0.1° phase accuracy
• Wide-bandwidth from DC to 200 kHz
• Single-handed operation and robust locking mechanism
• Reduced effects from magnetic fields, conductor position, and noise from nearby wires
• For EV/HEV battery charge and discharge efficiency testing and inverter and power conditioner conversion efficiency evaluations

A comment from the Good Design Award 2016

“The ergonomic design of these products appropriately reflects conditions in the field as well as worker needs through features such as one-handed operation and a grip that can be easily opened and closed in any orientation. In addition, they exhibit a high level of overall finish, including through the effective use of visual cues, for example use of yellow and gray to prompt the user to interact with the instrument in a way that avoids its inherent hazards.”

Germany iF Design Award
High-accuracy current sensors ideal for use with oscilloscopes and power meters

Compared to current sensors that use Hall elements, flux gate type current sensors are not prone to measurement error caused by variations in the external temperature. In addition, they can measure extremely low input (current values) and current waveforms with phase that lags by 90° with a high degree of precision. The CT6840 Series AC/DC Current Probes are ideal for measuring power waveforms with a digital oscilloscope and power meters.

Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Rated current500 A AC/DC
Max. allowable input720 A peak (requires derating)
Frequency characteristicsDC to 200 kHz
Phase: DC to 200 kHz
Amplitude and phase accuracyDC ±0.3 % rdg. ±0.02 % f.s. (Phase: Not defined)
DC < f ≤ 100 Hz ±0.3 % rdg. ±0.01 % f.s. (Phase: ±0.1°)
Defined to 200 kHz
Output voltage4 mV/A
(voltage output with the Sensor Unit use with a device having a 1 MΩ input resistance or higher)
Core diameterφ 20 mm (0.79 in)
Operating temperature, humidity-40 °C to +85 °C (-40 °F to 185 °F), 80% RH or less (with no condensation)
Power supply±11 V to ±15 V DC (Power suppled via the Sensor Unit, which supports 100 to 240 V AC)
Power consumption7 VA max. (at 500 A/55 Hz, ±12 V power requirement)
Dimensions and mass153 mm (6.02 in)W × 67 mm (2.64 in)H × 25 mm (0.98 in)D, 400 g (14.1 oz), cord length: 3 m (9.84 ft)
AccessoriesInstruction manual ×1, Mark bands ×6, Carrying Case×1

Compatible models...CT6844 (-05)

Compatible modelsCT6844CT6844-05
Power Analyzer PW6001, PW3390△ (Requires CT9900)OK
Power Analyzer 3390OK△ (Requires CT9901)
Power HiTester 3193 seriesOK△ (Requires CT9901)
Current Unit 8971△ (Requires the 9318)△ (Requires the 9318, CT9901)
F/V Unit 8940△ (Requires the 9318, 9705)△ (Requires the 9318, 9705, CT9901)
Catalog: AC/DC CURRENT PROBE CT6844-05, CT6845-05, CT6846-05Download PDF  [2MB]English
Catalog: SENSOR UNIT CT9555, CT9556, CT9557Download PDF  [1MB]English

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