6.4.4. Meaning of measurement results
The parameter measured and calculated by meter have the following meaning:
Maximum module power (@STC) measured by the instrument
Difference % of maximum measured power from nominal power (@ STC)
Voltage on point of maximum power
Current on point of maximum power
Table 2: List of parameter measured by the meter
Where:
→ control parameter that defines the final test result
Rated power with performance loss effect
(see § 6.3)
= rated power @STC of the module as declared by the manufacturer
The meter gives the following final response:
- Tol
(-)
+
Meter
Meas
Tol
(+)
-
Meter
Relation (1) is not verified but still applies:
- Tol
(-)
Meas
Tol
(+)
Relations (1) and (2) are not verified, but still apply:
- Tol
(-)
-
Meter
Meas
Tol
(+)
+
Meter
None of the relations (1), (2) and (3) are verified
where:
Tol
(-)
= Tol
(-)
(%)*Pnom → Negative tolerance in absolute value, declared by manufacturer
Tol
(+)
= Tol
(+)
(%)*Pnom → Positive tolerance in absolute value, declared by manufacturer
Instr.
→ Absolute instrument error in power measurement (see § 10.1)
(1) → Positive test result also considering instrument error in the measurement
(2) → Positive test result, except in case of instrument error in the measurement
(3) → Negative test result except in case of instrument error in the measurement
(4) → Negative test result also considering instrument error in the measurement