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SMFT-1000
Users Manual
20
PV String
Open circuit voltage measurement and circuit current test (short circuit test or operational).
Open circuit voltage measurement (V
OC
)
Open circuit voltage (V
OC
) measurement to IEC 62446-1 Clause 6.4. This test checks that
module strings are correctly wired and that the expected number of modules are connected in
series within the string. For strings connected in series, the measured voltage should be a sum
of the voltages of individual solar panels in the string. This test can also be also used to verify
open voltage of the individual panel.
Circuit current test - short circuit test (I
SC
)
The PV string circuit current test to IEC 62446-1 Clause 6.5.2 is a short-current measurement
test to verify the correct operational characteristics of the system and that no major faults are
within the PV array wiring. These tests are not to be taken as a measure of module / array
performance. Compare the results of the short-current measurement with solar panel
specifications. The PV Analyzer does all calculations automatically if solar panel specifications
are linked and Irradiance/Temperature measurements are transferred from the Irradiance
Meter.
Operational test method
Alternative test method for I
SC
(see IEC 62446-1 Clause 6.5.3).
To t es t:
1. Download the panel specifications.
2. Select PV model.
3. Enter the number of modules for each string.
4. Install Irradiance Meter at the solar panel to test.
5. Turn the rotary switch to V
OC
/I
SC
.
6. Connect the red test lead to positive connector of string and the blue test lead to negative
connector of string.
Tip: Push
to see connection diagram.
7. Follow the on-screen prompts.
The PV Analyzer determines the results for open circuit voltage measurement and short
circuit test as PASS or FAIL based on the chosen PV model panel data and number of
modules.
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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