Failure of CLAMP EARTH TESTER FT6380, FT6380-50 and FT6380-90

Non-conformance
When measuring the resistance higher than 30Ω or more, the measurement value may fluctuates a lot by open/close action of clamp sensor and may become the out of the accuracy specifications.
Note:
The low resistance required for the earth resistance measurement does not become the out of accuracy specifications.

Subjected products
CLAMP ON EARTH TESTER FT6380-50.and FT6380-90, as well as the repaired FT6380
Subjected period and serial number
  Newly shipped from our factory between February 8, 2023 and June 17, 2025 (serial No. 230151223 to 250608811)
  Repaired products by exchanging the clamp sensor between May 17, 2023 and July 3, 2025.

Action
If the above explained failure is found, please request the free repair to our sales office or distributor.