Solmetric PVA-600, Руководство пользователя

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3 Using the PVA-600
3-8
Sweep Disabled
PV current is stopped automatically at the end of each I-V measurement. However, to
ensure no current is flowing, press the red button on the front of the I-V Measurement
Unit to disable the measurement sequence. Pressing the red button again restarts the
measurement sequence.
WARNING If the LED on the PVA-600 is illuminated (either solid on or flashing), do not
connect or disconnect the PV leads.
Over-Temperature Protection
Built-in safeguards prevent the I-V Measurement Unit from operating at potentially
damaging internal temperatures.
Thermal Shutdown
All battery powered measurement instruments have upper temperature limits. The
operating temperature range of the I-V Measurement Unit is limited by the battery that
powers the unit. When the internal temperature approaches the battery's high-temperature
specification, the measurement unit automatically shuts down (disables itself) and the
Disabled message is displayed below the Measure Now button. In thermal shutdown,
PV power is no longer dissipated in the measurement unit. This removes one of the major
internal heat sources. To recover from thermal shutdown, wait for the measurement unit
to cool. Placing it in the shade or a cool place will speed the recovery.
NOTE The operating temperature rise inside the I-V Measurement Unit is primarily determined
by several factors: outside air temperature, direct sunlight, temperature of the surface on
which it is placed, and PV power dissipated in the instrument with each I-V measurement
sweep. The PV power depends on the details of the PV module or array being tested, as
well as the rate at which measurements are being taken by the user. Given these
application-related factors, it is possible that thermal shutdown will occur at an ambient
temperature at or lower than the specified maximum operating temperature.