GMC-I Messtechnik GmbH
5
➭
Switch the
PROFITEST PV
SUN
test instrument on.
The module’s open circuit voltage
U
0
appears at the display.
Example
Note
In the case of incorrect polarity, a warning symbol
appears to the right of the voltage display.
Example
➭
Reverse polarity at the solar module and start testing over
again.
9.3
Measuring Short-Circuit Current I
SC
per EN 62446
Warning!
Disconnect the solar module under test from the system
before performing the measurement.
➭
Connect the
PROFITEST PV
SUN
test instrument to the module
with the help of suitable solar plugs.
➭
Switch the
PROFITEST PV
SUN
test instrument on.
The module’s open circuit voltage
U
0
appears at the display.
➭
Press the
I
SC
key.
Open circuit voltage
U
0
and short-circuit current
I
SC
appear at the
display:
Example
The (+) and (–) terminals at the solar module are short circuited
during the measurement, and momentary short-circuit current is
measured. Insulation resistance is measured at the same time
(see section 9.4).
9.4
Testing Insulation Resistance per EN 62446
Warning!
Disconnect the solar module under test from the system
before performing measurement.
Attention!
!
Insulation measurement per EN 62446 is executed be-
tween short circuited (+) / (–) and (
) terminals.
➭
Connect the
PROFITEST PV
SUN
test instrument to the module
with the help of suitable solar plugs.
➭
Connect the ground terminal at the
PROFITEST PV
SUN
to the
module frame.
➭
Switch the
PROFITEST PV
SUN
test instrument on.
The module’s open circuit voltage
U
0
appears at the display.
Selecting the Test Voltage
➭
Press and hold the
RISO/250V/500V/1000V
key for at least 2
seconds.
The currently selected test voltage appears the display.
➭
Select the required insulation test voltage by briefly and re-
peatedly pressing the
R
ISO
/250V/500V/1000V
key.
The last selected value is saved after a short period of time, and is
then cleared from the display.
Example
Executing the Insulation Resistance Measurement
➭
Press the
I
SC
/
R
ISO
key and read the measured value from the
display.
The (+) and (–) terminals at the solar module are short circuited
during the measurement, and momentary short-circuit current is
measured. Insulation resistance is measured at the same time.
U
0
: 995 V
I
SC
: ---
R
ISO
: ---
U
0
: Pol
I
SC
: ---
R
ISO
: ---
!
U
0
: 985 V
I
SC
: 7.6 A
R
ISO
: > 20 M
U
0
: 870 V
I
SC
: 0.0 A
R
ISO
: ---
Uiso = 1000 V
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