HT instruments SIRIUS89N - Manual (Page 51)

SIRIUS89N
EN - 49
6.5. EARTH: SOIL RESISTANCE AND RESISTIVITY MEASUREMENTS
Turn the
switch on EARTH
position.
The
F1 key permits to select one of the following measuring modes (which
can be shown cyclically when pressing the key):
Mode "2-W"
(the instrument measures the resistance between 2 points).
Mode "3-W" (the instrument measures the resistance using two auxiliary
earth rods).
Mode "
ρ" (the instrument measures the ground resistivity).
At the end of each test, instrument shows automatically the medium value of Earth
Resistance or Earth Resistivity calculated on the base of any measured values until that
moment.
F2 key clear medium value of Earth Resistance or Earth Resistivity and the
counter of executed Resistance measures.
CAUTION
Never disconnect the test leads from the circuit under test when the
message
"MEASURING" is displayed