1000 A AC/DC High-Precision Current Probe for Power Efficiency Testing
AC/DC CURRENT PROBE CT6846

Description
Hioki AC/DC clamp sensors are best-in-class current sensors for use with power meters, Memory HiCorders and high performance oscilloscopes. The CT6846 is a high-precision 1000 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.
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.”
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
• 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
Model No. (Order Code)
CT6846 | 1000 A AC/DC, PL23 terminal |
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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.




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 current | 1000 A AC/DC |
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Max. allowable input | 1700 A peak (requires derating) |
Frequency characteristics | DC to 20 kHz Phase: DC to 20 kHz |
Amplitude and phase accuracy | DC ±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 20 kHz |
Output voltage | 2 mV/A (voltage output with the Sensor Uni use with a device having a 1 MΩ input resistance or higher) |
Core diameter | φ 50 mm (1.97 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 consumption | 7 VA max. (at 1000 A/55 Hz, ±12 V power requirement) |
Dimensions and mass | 238 mm (9.37 in)W × 116 mm (4.57 in)H × 35 mm (1.38 in)D, 990 g (34.9 oz), cord length: 3 m (9.84 ft) |
Accessories | Instruction manual ×1, Mark bands ×6, Carrying Case×1 |
Compatible models...CT6846 (-05)
Compatible models | CT6846 | CT6846-05 |
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Power Analyzer PW6001, PW3390 | △ (Requires CT9900, CT ratio 2) | OK |
Power Analyzer 3390 | OK (CT ratio 2) | △ (Requires CT9901, CT ratio 2) |
Power HiTester 3193 series | OK (CT ratio 2) | △ (Requires CT9901, CT ratio 2) |
Current Unit 8971 | △ (Requires the 9318, CT ratio 2) | △ (Requires the 9318, CT9901, CT ratio 2) |
F/V Unit 8940 | △ (Requires the 9318, 9705, CT ratio 2) | △ (Requires the 9318, 9705, CT9901, CT ratio 2) |
Catalogs
AC/DC CURRENT PROBE CT6844, CT6845, CT6846 
SENSOR UNIT CT9555, CT9556, CT9557 
Catalog: HIGH ACCURACY / WIDEBAND CURRENT SENSOR Series CT686x, CT687x, CT684x
Technical Notes
High-precision, Wideband, High Stable Current Sensing Technology 
AC/DC Current Probe CT6844/CT6845/CT6846
Declaration of Conformity
AC/DC CURRENT PROBE CT6845,CT6845-05,CT6846,CT6846-05 [100KB] 
User Guides
Electrical Measurements of Lithium-Ion Batteries
Evaluation of Input and Output Characteristics of Power Conditioners 
Comprehensive Evaluation of Inverter Motors 
Testing System Interconnection Protection Function of Power Conditioners 
Synchronized Input and Output Measurement of Three-Phase Inverters 
Evaluate the Efficiency of a DC-DC Converter 
There are no drivers, firmware or software available for this product.