HT instruments MACROTEST G3 - Manual (Page 74)

MACROTESTG3 - COMBIG3
EN - 73
5. Touch the icon to zero the value in the “%” field and
use the virtual keyboard to set the value of V% in the
range 1% to 99%.
Confirm the selection and go back to the previous
screen
6. Go to step no. 9 in case the value of Z1 (Offset) has been set manually. In case of the
value of Z1 (Offset) has NOT been manually set connect the instrument to the initial
point of the main line being tested (typically downstream to a protection device)
according to Fig. 32 or Fig. 33 in order to carry out the first Z1 (Offset) impedance
measurement. In this case the instrument will measure the impedance upstream of the
initial point of the main line being tested taking it as start reference. The following screen
(referred to L-L measurement) appears on the display
7. Touch the icon “
” to start the first Z1 (Offset)
impedance measurement. The symbol “ ” appears on
the display during measurement. At the end of
measurement the following screen appears on the
display
8. The value of Z1 (Offset) impedance is shown on the
display and is automatically included on the lower right
icon, together with the “
” symbol to indicate the
instantaneous saving of the value
9. Connect the instrument to the final point of the main
line being tested according to Fig. 32 or Fig. 33 in order
to measure the Z2 impedance at the end of line. The
screen to the side is displayed. Note the previously
measured Z1 (Offset) value displayed