HT instruments GEO416 - Manual (Page 13)

GEO416 - GEO416GS
EN - 12
4.5.  - GROUND RESISTIVITY MEASUREMENT
The ground resistivity value is an essential parameter to calculate the resistance value of
the earth rods to be used for the earth installation’s construction. The measurement is
effected according to standards IEC 781, VDE 0413, IEC/EN61557-5.
CAUTION
 The instrument can be used for voltage and current measurements on
installations with over voltage category equal to CAT III 240V to earth and
maximum voltage of 415V between inputs. Do not connect the instrument
to installations whose voltages exceed the limits indicated in this manual.
Exceeding such limits may cause electric shock to the user and damage
the instrument
 Always connect the cables to the instrument and to the alligator clips when
the latter are not connected to the plant under test
 Always respect the Hand-held area of probe (see § 4.2)
 If the length of the supplied cables isn’t suitable for the plant under test (see
§ 11), You can create your own extensions following indications in § 11.2.1
Fig. 6: Ground resistivity measurement
1. Turn on the instrument pressing the ON/OFF key
2.
Pressing right/left arrow keys ,  select MOD, then pressing up/down arrow
keys ,  select
 option