Solmetric PVA-600, Руководство пользователя

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4 Using the PVA-600 Software
4-23
Figure 29. Controls for measuring irradiance and/or temperature automatically
using wireless sensors
2. If you want the PVA-600 to extract the temperature mathematically from the
measured I-V data, select
Determine temperature from I-V curve
. This feature
determines the effective cell temperature.
3. If you are using external sensors to monitor temperature, select
Enter module
temperature manually
and enter the temperature in the
PV Temperature
text
box. The value you enter is an estimated cell temperature. Be sure to adjust your
measured value by an appropriate offset to refer it to the PV cells themselves.
4. If you are using the PVA Sensor Kit to transmit the temperature wirelessly, select
Use wireless temperature sensor . The Offset number is a temperature offset
added to the module backside temperature to get an approximation of the PV cell
temperature.
5. If you want the PVA-600 to extract the irradiance mathematically from the measured
I-V data, select
Determine irradiance from I-V curve .
6. If you are using a manual sensor to measure irradiance, select Enter solar
irradiance manually and enter the irradiance in the Irradiance (POA) text box.
7. If you are using the PVA Sensor Kit to transmit the irradiance wirelessly, select Use
wireless irradiance sensor
. In the
Cal Factor
box, enter the calibration factors
from the sensor label.
Enter Array Slope and Azimuth
If you are using the Sandia Performance Model and a wireless or manual irradiance
sensor, perform the following steps.
1. Click on the Array Plane button to access the screen used to enter the slope and
azimuth of the specific array as shown in Figure 30.