HT instruments MACROTEST G3 - Manual (Page 66)

MACROTESTG3 - COMBIG3
EN - 65
6.7.2. Earth measurement with optional clamp T2100
This measurement allows evaluating the partial resistances of the single earth rods of
complex ring networks without disconnecting them and performs the calculation of the
corresponden parallel resistance. Please refer to the user manual of clamp T2100 for
specific details. The following measurement methods are available:

Measurement of rod resistance with direct connection of clamp T2100 to the instrument.
 Measurement of rod resistance by means of clamp T2100 used independently and
subsequent connection of the clamp to the instrument for data transfer.
CAUTION
The measurement carried out by clamp T2100 can be used to evaluate single
rods resistance values within an earth installation without disconnecting the
rods, assuming they do not affect each other (see Fig. 30).
Fig. 30: Resistance measurement of single rods with clamp T2100