GREEN TEST-FTV 100
English
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♦
Tcel, which is the cell temperature of a PV module, can be measured using a thermoresistive
sensor directly connected to the instrument or using the remoted FTV 100 module.
♦
Tamb is the ambient temperature, which can be measured using a sensor connected directly
to the instrument or using a remoted FTV 100 module (the probe is generally placed in the
shade).
In the measurement of P
DC
, if an operating temperature
≥≥≥≥
40°C is measured on the backs of the modules, a
temperature correction of the site itself is allowed.
In this case, the relation Pcc > 0.85 x Pnom x I/Istc becomes:
P
DC
> (1 – Ptpv – 0.08) x Pnom x I/Istc
where Ptpv corresponds to the thermal losses of the photovoltaic generator.
Several practices exist. It is possible to select two types of mathematical relation to calculate the correction
factor.
The temperature of the photovoltaic cells being known, this parameter is calculated using the relation:
Ptpv = (Tcel – 25) x
γγγγ
Or, from the ambient temperature, by:
Ptpv = [Tamb - 25 + (NOCT – 20) x I/0,8] x
γγγγ
8.2.3 SELECT A SITE
This function is used to select the data of a photovoltaic site stored in memory. This configuration is used to
perform the measurements and as reference for a possible printed report.
This menu includes the following commands:
♦
NEXT SYSTEM
Press ENTER to go to the next recorded site
♦
PREVIOUS SYSTEM
Press ENTER to go to the previous recorded site
♦
ERASE SITE
Press ENTER to erase the selected site from memory
♦
ERASE ALL SITES
Press ENTER to erase all sites stored in memory
8.2.4 MODIFY A SITE
This function lets you modify the data of a site entered previously.
To make modifications, place the cursor on the line concerned and press ENTER, enter the new value, and
press ENTER again to confirm the modification.
Press ESC to confirm the modifications and update the data in memory.
8.3 MEASUREMENT MENU
8.3.1 MEASUREMENT ACQUISITION
Each of the 20 sites can acquire up to 12 measurement reports (certifications).
Press ENTER to select the measurements to be acquired.
♦
ENVIRONMENT AND DC
Press ENTER to select the ENVIRONMENT and DC measurements of the photovoltaic generator (a red
asterisk “*” appears on the element selected).
To confirm the storage of the selected measurements, place the cursor on CONFIRM MEASUREMENT and
press ENTER.
