Solmetric PVA-600, Руководство пользователя

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4 Using the PVA-600 Software
4-5
Name Description
Use wireless irradiance sensor
: irradiance is transmitted
wirelessly when using the PVA Sensor Kit.
Cal Factor
: enter calibration factor of the sensor.
Enter solar irradiance manually : irradiance is entered
manually from an external sensor. This method is
suitable when irradiance is relatively stable.
Irradiance (POA)
: enter irradiance manually in this
text box.
NOTE – All irradiance measurements must be made in
the plane of the array (POA). This means the
irradiance sensor is mounted parallel to the PV
modules. Horizontal plane measurements are not
supported.
Determine irradiance from IV curve : PVA-600 extracts
irradiance mathematically from measured I-V data.
This method is used when the main objective is to
demonstrate consistency among PV strings and to
observe subtle deviations from predicted I-V curve
shape. An external sensor is not required because the
array itself is the sensor. Assumes functional PV
module(s).
Use wireless temperature sensor : temperature is
transmitted wirelessly when using the PVA Sensor
Kit.
Offset
: enter the temperature offset to be added to
the module backside temperature to
determine cell temperature.
NOTE – The offset will vary typically from 0º C to 8 º C
during a day depending on mounting and wind
conditions. The default value of 3º C is only a
typical number.
Enter module temperature manually : temperature is
entered manually from an external sensor. This
method is suitable when temperature is relatively
stable. Temperature readings should be taken close to
the middle of a panel. Temperatures toward the
outside of a panel tend to be cooler.
PV Temperature : enter temperature manually in
this text box.
Determine temperature from I-V curve
: PVA-600 extracts
temperature mathematically from measured I-V data.
This method is used when the main objective is to
demonstrate consistency among PV strings and
observe subtle deviations from predicted I-V curve
shape. An external sensor is not required because the
array itself is the sensor. Assumes functional PV
module(s).