HT instruments GEO416 - Manual (Page 8)

GEO416 - GEO416GS
EN - 7
4.3. EARTH 3W – 3 WIRE EARTH RESISTANCE MEASUREMENT
The measurement is carried out in compliance with 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 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. 3: Three-wire earth resistance 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 3W option
3. A screen similar to the one beside
appears where the input interfering
voltage value of the instrument is
displayed
Input interfering voltage
value
4. Connect the blue, red, green and black cables to the corresponding instrument’s input
terminals H, S, ES, E then adding crocodiles if necessary