HT PV-ISOTEST User Manual page 27

6. Use the arrow keys  or  and select the position "Lim.".
The display shows the screen to the side.
7. Use the arrow keys (,) to set the minimum limit
threshold for insulation measurement, which can be
selected between 0.05 M and 0.10M.
8. Connect the instrument to the PV string to be tested as shown in Fig. 8.
that any surge arresters connected to the string cables must be disconnected and that
it is advisable to measure upstream of any blocking diodes
Fig. 8: Instrument connection for insulation measurement in GFL mode
Upon pressing the GO/STOP key, different error messages can be displayed
by the instrument (see § 6.2.3) and, therefore, the test cannot be started.
Check and eliminate, if possible, the problem causing the error message
before going on with the test.
9. Press and hold the GO/STOP key for 2s in order to
start the test (insulation measurement in DUAL mode). In
case no error conditions occur, the instrument displays
the message "Measuring..." as shown in the screen to
the side.
CAUTION
EN - 26
PV-ISOTEST
GFL 15/10 – 18:04
R p - - -
V P N V P E
0 V 0 V

10 1500V 0.10M
NMOD Vtest. Lim.
Remember
GFL 15/10 – 18:04
R p - - -
V P N V P E
0 V 0 V
Measuring...
10 1500V 0.10M
NMOD Vtest. Lim.
M 
V N E
0 V
M 
V N E
0 V