Arrangement of controls and connectors of measuring cables is given in Figure 1.2.
Figure 1.2
1
…
4 –
jacks for cables connection;
5 –
LCD display;
6
–
button
switches
megohmmeter on and off;
7 – button
calls a memory
function
(writing,
reading,
deletion,
transmission of measured values to a
computer);
8 – button
starts and stops
measurements. In the menu mode, the
button is used to confirm the selected option
or to return to the main mode.
9 – button
switches between types and scopes of the displayed information
during insulation test (see item 2.3.4): value of insulation resistance, Dielectric Absorption
Ratio, Polarization Index. After the active measurement is finished, holding this button
returns to the main menu. In the menu mode, the button allows scrolling down the menu.
10 –
button
is intended for modes switching: selection of test voltage during
insulation resistance measurement, measuring of metallic bonding resistance and
classification voltage. In the menu mode, the button allows scrolling up the menu.
Appearance of shielded measuring cable is given in Figure 1.3.
Figure 1.3
Combined plug: signal wire to the
socket “-“, cable shield to the
socket “
Е
”
7