Operating instructions, Caution – HT instruments PVCHECK User Manual
Page 25
PVCHECK
EN - 23
6. OPERATING INSTRUCTIONS
6.1.
MEASURING EFFICIENCY PV PLANTS BY USING REMOTE UNIT SOLAR-02
For the sake of simplicity, further in this section, the word “string” will be used, although
often the term “photovoltaic field” would be more correct. From the point of view of the
instrument, the management of a single string or of more parallel strings (PV field) is
identical. The instrument PVCHECK (Master) allows measuring the efficiency of PV
installations in combination with the optional remote unit SOLAR-02, which the irradiance
and temperature probes are connected to. This remote unit is capable of communicating
with the Master unit (to manage data synchronization and download) via a radiofrequency
(RF) connection, which is active up to a maximum distance of 1m between the units.
CAUTION
The maximum voltage between inputs P and N is 1000VDC. Do not
measure voltages exceeding the limits given in this manual. Exceeding
these limits could result in electrical shocks to the user and damage to the
instrument.
In order to guarantee the operator’s safety, while making the connections,
disable the system being measured by means of the switches/breakers
upstream and downstream of the DC/AC converter (inverter).
Fig. 4: Connection of instrument for efficiency measurement on a PV installation
1. Check and, if necessary, set the sensitivity of the reference cell on SOLAR-02
consistently with the type of PV modules which will be measured (please refer to the
user manual of SOLAR-02).
2. We recommend making a preliminary evaluation of the value of irradiation on the
surface of the PV modules being tested by means of unit SOLAR-02 (operating
independently) and the reference cell.
3. Switch on PVCHECK, check and, if necessary, change the instrument settings relevant
to the type of remote unit, to the minimum irradiation threshold, to the full scale of the
DC clamp, to the integration period and to the parameters of the system being
measured (see § 5.1.4, § 5.1.5, § 0, § 5.2.1 and § 5.2.2).