HT F3000U, Руководство пользователя

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NEPTUNE
EN - 18
5. Press keys  / or  /ZERO to select the value among the options: 0.10M

,
0.230M

, 0.50M

, 1.00M

, 100M

, no . Option
“
no
”
indicates that no threshold was
set (see Fig. 16).
Fig. 16: Setting the limit threshold for insulation measurement
6. Press key GO/HOLD to confirm and quit the setting section. The buzzer gives a short
continuous sound.
7. Insert the red lead into input terminal V

/+ and the black lead into input terminal
COM/

and possible alligator clips, and connect the instrument to the system to be
tested (see Fig. 15).
8. Press key GO/HOLD to activate the test. The following screen may appear on the
display to signal the presence of a voltage >10V found on the input terminals,
preventing the test to be carried out.
Fig. 17: Presence of voltage on the input terminals
9. In case no anomalous conditions are found, the instrument performs the test until key
GO/HOLD is pressed and held. Otherwise, the test has a duration of approx. 3s if the
key is immediately released, symbol flashes on the display and the buzzer gives out
an intermittent sound. At the end of the test, the following screens appear on the
display.
Fig. 18: Results of insulation measurement in AUTO mode
10. In the screen in Fig. 18
–
left side, the value of insulation resistance is present (symbol
“
>999
”
indicates the out-of-range condition) with positive result
“
OK
”
(value higher than
the set threshold). In the screen in Fig. 18
–
right side, the value of insulation resistance
is present with negative result
“
NOT OK
”
(value lower than the set threshold).
11. Press keys  / or  /ZERO to display the real applied voltage.