Fluke ScopeMeter 123B, Руководство пользователя

Страница: 174 / 192

123B/124B/125B
Users Manual
Autoset Options
On delivery or after a reset, the Autoset function captures
waveforms
≥
15 Hz and sets the input coupling to DC.
Note
Setting the Auto Set adjust to 1 Hz slows down
the Auto Set response. The display shows
LF-AUTO.
To configure Auto Set for capturing slow waveforms down
to 1 Hz:
1. Push

to open the Menu.
2. Use
YZ
to highlight USER OPTIONS .
3. Push

to open the USER OPTIONS menu.
4. Use
YZ
to highlight Autoset Settings .
5. Push

to open the USER > AUTOSET menu.
6. Use
YZ
to highlight Search For Signals >1 Hz .
7. Push

to accept the change and exit the menu.
To configure Autoset to maintain the actual input coupling
(AC or DC), continue from step 5 above:
6. Use
YZ
to highlight Couplings Unchanged .
7. Push

to accept the change and exit the menu.
Grounding Guidelines
XW
Warning
To prevent possible electrical shock, fire, or
personal injury, use only one COM (common)
connection
˜
or ensure that all connections
to COM
˜
are at the same potential.
Incorrect grounding can cause problems. Use these
guidelines for proper grounding:
•
Use the short ground leads when measuring DC or
AC signals on input A and input B. See Figure 8, item
4 on page 17.
•
Use the unshielded black ground lead to COM
(common) for Ohm (
Ω
), Continuity, Diode, and
Capacitance measurements. See Figure 7, item 1 on
page 16.
•
Use of the unshielded ground lead is also possible for
single or dual input measurements for waveforms with
a frequency up to 1 MHz. This may add some hum or
noise to the waveform display due to the unshielded
ground lead.
68