Measure the earth!

Self-contained and leakproof, the C.A 6421 is an easy-to-use lightweight site instrument, designed for use in the field. Earth resistance is measured on a large, very rugged galvanometer using traditional rod methods.

* earth resistance: 0.5Ωat 1,000 Ω (log scale) )
* 3 fault presence indicators to validate the measurement
* measurement frequency: 128Hz
* connection of rods to colour-coded terminals 

* removable captive connection strip between S and H for 2-wire resistance measurements
* protection by HRC fuse
* power supply: 8 x 1.5V batteries for average charge life of 1,800 measurements of 15 secs
  each (continuous control of battery charge)
* measurements in compliance with IEC 61557, VDE 0413 and BS 7671
* electrical safety: IEC 1010 + IEC 61557
* dimensions: 238 x 136 x 150mm; weight: 1.3kg