Fluke 12B/18, Инструкция

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English
Page
10
Automatic Selection
18
M
µ
F
(12B only)
If a dc or ac voltage greater than about 4.5V is present across the inputs
when you are attempting to measure continuity or resistance, the meter
switches to dc or ac voltage mode.
W
Warning
Repetitive transients on a dc bus will cause
k
CHEK
to
select ac volts, even though a hazardous dc voltage may
be present. To avoid a misleading display and possible
electric shock, manually select the proper volts function
for measurements on these circuits.
When dc or ac voltage is automatically selected, the meter has low input
impedance (
≅
2 k
Ω
). This low impedance, which places a moderate load
on the circuit under test, is appropriate only for measuring power supply
voltages under load. Do not use Automatic Selection to measure voltage
in circuits that could be damaged by a 2 k
Ω
load.
AUTOMATIC
SELECTION
+
COM
or
Z Lo
If AC detected
If DC detected
Meter puts 2 k
Ω
load on circuit.
RANGE
RANGE
Locked-Mode Functions
Disables Automatic
Selection and locks
meter in selected mode.
RANGE
RANGE
0.000 00.00 000.0 0000
2 sec
or
or
Reenables
Automatic
Selection
VDC
VAC
:
:
LOW IMPEDANCE
600V
CAT III
ag07i.eps
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