Solar Installation PV100
5.4 Solar Panel Auto Measurement
Always ensure that the circuit under test is electrically isolated from the
mains supply.
Due to the high impedance of the voltage measuring circuit and the
possibility of a leakage from the panel internals to the outer casing a
voltage may be measured on the red 4mm test terminal prior to starting a
test.
Table 1
Viso
250v
500v
1000v
Note: During the Insulation test a short circuit is connected across the solar panel
by the PV100. The Insulation test is then applied between the Red 4mm test
lead and the two panel terminals.
Note: If the DC voltage polarity is incorrect or the voltage is <5V or >1000V the
Auto Test will be inhibited.
1.
Connect the PV100 to the PV module as shown,
using the supplied test lead adaptors.
2.
The red test probe must be connected to any
exposed metal parts in order to measure the
insulation resistance to the DC conductors.
3.
The black test probe is only required if an earth
continuity test is to be performed.
4.
The PV 100 will automatically detect any DC
voltage connected to the PV test socket inputs 8
and 9 and display the measured voltage.
5.
If the polarity of the incoming voltage is reversed
the polarity indicator will flash, a cross is shown
next to the voltage icon and the auto test
sequence is inhibited until the polarity is corrected.
6.
If the voltage is >30v then the shock hazard icon
will flash.
7.
Use the Viso button to select either the 250V, 500V
or 1000V Insulation test voltage.
8.
Press the Auto button and the Solar PV100 will
automatically perform the following tests:
9.
The measurement results will remain on the LCD
for 20 seconds or until a key is pressed.
10.
A tick or cross will be displayed next to the
insulation
whether the result is above or below the threshold
values shown in Table 1.
Pass / Fail Limit
0.5 M ohms
1.0 M ohms
1.0 M ohms
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Operating Instructions
Open Circuit Voltage
Short Circuit Current
Insulation Resistance
resistance
measurement
indicating