News - General T&M

Clamp Sensors offer High-Precision Measurement over a broad Temperature Range

20 June 2014 - Hioki E.E. Corporation launched the AC/DC Current Probe CT6841 (20 A AC/DC rated current) and the AC/DC Current Probe CT6843 (200 A AC/DC rated current) for high precision testing applications particularly in the electric vehicle and hybrid vehicle markets.

During development of electric and hybrid vehicles, the need to evaluate motor efficiency requires engineers to measure current flowing in wiring inside the engine compartment at a high level of precision. However, since wiring cannot be removed easily when measuring current in actual vehicles, pass-through current sensors cannot be used. Further complicating the task are high temperatures and a lack of space in the compartment, which houses both the engine and a complex network of wiring. These conditions demand compact, high-precision current sensors that can make measurements in a broad range of temperatures. Hioki's newly launched CT6841 and CT6843 AC/DC Current Probes meet this measurement need.

Compared to Models 9277 and 9278, both the CT6841 and CT6843 can measure current across a broad frequency band at a high degree of precision. Furthermore, they both feature an operating temperature range of -40°C to 85°C, allowing their use in a broader range of temperatures than legacy models with a 0°C to 40°C range. This capability allows the instruments to be used to measure current inside hot engine compartments. Additionally, the new sensors are less susceptible to the effects of noise from nearby wiring than legacy models, allowing more accurate measurement.

Additionally, the CT6841 and CT6843 are less susceptible to the effects of noise from nearby wiring than previous models, allowing more accurate measurement.

The confined spaces of automobile engine compartments are filled with engine components and complex wiring networks. The CT6841 and CT6843 feature more compact sensor heads and grips, making it easy to measure current in such limited spaces. Also, whereas legacy models incorporated a sensor head with squared-off edges, the CT6841 and CT6843 have rounded edges so that the sensor head can be more easily applied to wiring in confined spaces.

www.hioki.com/

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