3 Using the PVA-600
3-9
Operating Under High-Temperature Conditions
The most demanding thermal conditions for the measurement unit are:
Hot day
No wind
No shade
High open circuit voltage
I-V sweeps taken in rapid sequence
If you expect these conditions, plan ahead to minimize temperature rise in the I-V
Measurement Unit. Shade the measurement unit from direct sunlight, elevate it above hot
surfaces, and allow more time between I-V sweeps.
Over-Voltage Protection
If greater than 600 V dc is applied to the I-V Measurement Unit, the PVA-600 detects the
over-voltage condition and switches into disabled mode automatically and an I-V
measurement does not take place.
Over-Current Protection
If greater than 20 A dc is applied to the I-V Measurement Unit, the PVA-600 detects the
over-current condition and switches into disabled mode automatically and an I-V
measurement does not take place.
The I-V Measurement Unit also has limited protection against the fast, high-current
transients that can be produced by high-efficiency PV modules.
CAUTION
Do not measure high-efficiency PV modules (or strings) in parallel.
