HT instruments MPP300 - Manual (Page 18)

MPP300
EN - 16
CAUTION
 When SOLAR300N is set in order to use MPP300 as a remote unit, ALL
connections relevant to electrical quantities (voltages and currents) must
be carried out on unit MPP300. SOLAR300N must have no voltage nor
current connected to its inputs.
 The maximum voltage for the inputs of MPP300 is 1000VDC between
inputs VDC1, VDC2, VDC3 and 600VAC between inputs VAC1, VAC2,
VAC3. 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).
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 SOLAR300N, check and, if necessary, change the settings relevant to the
type of remote unit, to the minimum irradiation threshold, to the full scale of the AC and
DC clamps, to the parameters of the system being measured and to the value of the
integration period (see SOLAR300N user’s manual).
4. In order to guarantee the operator’s safety, disable the system being measured by
means of the switches/breakers upstream and downstream of the DC/AC converter
(inverter).
5. Connect SOLAR300N to the MPP300 unit via the USB cable and bring SOLAR-02 and
MPP300 nearer (max distance approx. 1 m). All instruments must be switched on
(see the User Manuals of SOLAR-2 and MPP300 for further details). The display of
SOLAR300N must show (for 5 seconds) the message “MPP300 connected”.
6. On SOLAR300N, access the GENERAL MENU, select the function View Measures
and press ENTER; wait for the three units to start communicating with each other. This
condition is highlighted by the contemporary presence of the following indicators:
a. Symbol steady (not flashing) on the display of SOLAR-02
b. MASTER and REMOTE LEDs flashing green on unit MPP300
7. Connect the VDC1(+) and VDC1(-) inputs of the MPP300 unit to the output terminals of
the string, paying attention to the polarity and the colours indicated in Fig. 4 or Fig. 5.
8. Repeat the operation described in the step above for other possible DC power trackers
to be monitored by using the VDC2 and VDC3 inputs according to the number of DC
inputs set (see SOLAR300N user’s manual).