Hioki AC/DC clamp sensors are best-in-class current sensors for use with power meters, Memory HiCorders and high performance oscilloscopes. The CT6841 and CT6843 are DC to 1MHz/20A and DC to 500kHz/200A sensors, ideal for capturing signals during the efficiency testing of batteries, inverters and power conditioners.
• CT6841 (20 A AC/DC)
• CT6843 (200 A AC/DC)
These products cannot be used alone. The optional 9555-10 is required in order to supply power and connect the clamp to a Memory HiCorder or other instrument. Products can be directly connected the Power Meter 3193-10, and 3390
Operating temperature range -40˚C to 85˚C
Compact, high-accuracy clamp current sensor
Ideal for use in environmental testing
| The CT6841 and CT6843 feature broad temperature characteristics and an operating temperature range of -40°C to 85°C, allowing them to be used in operational evaluations of devices and inside equipment that are subject to extreme temperature changes. The current sensors’ tough performance helps ensure you can make the measurements you need. |
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Single-handed operation, even in confined spaces
Reliable track record and high accuracy of ±0.3% rdg.
| Broad frequency characteristics |
Accurate phase characteristics
(required for AC power measurement) |
Zero-point stability made possible by flux gate technology* |
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| Frequency characteristics (Amplitude) |
Frequency characteristics (Phase) |
Long-term offset drift |
Dramatic improvements
Compared to the legacy UNIVERSAL CLAMP ON CT 9277/9278, the CT6841/CT6843 deliver dramatically improved characteristics.
| Reduced effect of the position of the conductor in the clamp |
Reduced effect of noise from nearby wires |
Minimized effect of magnetization caused by DC measurement error |
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Effect of conductor position
(55 Hz AC current input, 5 mm wire) |
Effect of nearby conductors
(Checking with 55 Hz AC current) |
Effect of magnetization
(Checking offset after current input) |
Applications
Measuring the charge and discharge efficiency of EV/HEV batteries
In some cases, it is not possible to use high-accuracy pass-through sensors to evaluate EVs and HEVs since their wiring cannot be easily disconnected. The CT6841/ CT6843’s clamp-type design simplifies high-accuracy measurement. The resin casing of the clamp is more resistant to deformation from heat than that used in legacy products, allowing you to take measurements inside engine compartments without issue. |
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Evaluating inverter and power conditioner efficiency
A current sensor’s amplitude accuracy and phase accuracy are both important considerations when you need to accurately measure AC power. Phase accuracy has a particularly large effect on power values when the power factor is low. The CT6841/CT6843 help ensure accurate power measurement by delivering high phase accuracy. |
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Evaluating fuel cells, contactless power supply circuity, and other next generation devices
Offset drift* is characterized by minute variations, but those changes can add up over time, resulting in large errors during long-term measurement. The CT6841/CT6843 are designed to minimize offset drift, allowing them to be used in long-term evaluation of fuel cells. Thanks to their broad frequency characteristics, the sensors can also measure DC ripple current. Additionally, the current sensors can be used to measure power transmission efficiency in contactless power supply circuitry thanks to their DC to 1 MHz frequency band.
*Offset drift: A phenomenon that occurs when measuring DC current with a clamp- type current sensor. The zero point gradually shifts relative to its position at the start of measurement due to variations in the temperature of the sensor’s internal circuitry. |
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