MI 3109 EurotestPV Lite
Measurements
50
Displayed results for I / V curve test:
Uoc .......... measured / STC open circuit voltage of the panel
Isc............ measured / STC short circuit current of the panel
Umpp ....... measured / STC voltage at maximal power point
Impp ........ measured / STC current at maximal power point
Pmpp ....... measured / STC maximal output power of the panel
Notes
:
Before starting the PV measurements settings of PV module type and PV test
parameters should be checked.
For calculation of STC results correct PV module type, PV test parameters, Irr
and Tcell values must be measured or be entered manually before the test. The
Irr. and T results in ENV. menu are considered. Refer to Appendix E for further
information.
The Irr. and T measurements should be carried out immediately before the I / V
curve test. Environmental conditions must be stable during the tests.
For best results PV remote unit A 1378 should be used.
5.8 Automatic measurement procedure according to IEC/ EN 62446
(Auto)
The Auto function is intended to perform a complete test of PV panel, string, array:
insulation resistance between positive output and earth
insulation resistance between negative output and earth
calculated insulation resistance between shorted both outputs and earth
open circuit voltage (measured and STC)
short circuit current (measured and STC)
The test is carried out in one set of automatic tests, guided by the instrument.
The Auto function test results are divided into two screens. See chapter 4.2 Function
selection for instructions on key functionality.
Figure 5.42: Automatic measurement starting screens
Test parameters for automatic measurement
Uiso
Test voltage
[50 V, 100 V, 250 V, 500 V, 1000 V]
Limit
Minimum insulation resistance
[OFF, 0.01 M
÷ 200 M
]
Time
Test duration
[OFF, 5 s ÷ 60 s ]
