Fluke 77/BN - Current Measurement

Refer to the warning on page 4:
CURRENT MEASUREMENT
CAUTION
De-energize the circuit before con-
nection the test leads in series with
the load.
Refer to the Figure 7 on page 19 for the
correct sequence for measuring cur-
rent. Before energizing the circuit, make
sure connections are secure and that
the function switch is in the ampere
position A œ~ or A=. De-energize the
circuit before removing the test leads
from the circuit and reconnecting the
break in the circuit (step 2).
Be sure to reinsert the test leads in the
voltage terminals and return the func-
tion switch to voltage position V~ or
V= before making subsequent volt-
age measurements.
Select the acorde function A ~or A=.
For measurements up to 320 mA, con-
nect the test leads to the 300 mA and
COM terminals, or alternatively, to the
300 mA and 104A terminals (not illus-
trated).
The 300 mA and 10A terminals are
limited to 630 mA and 15A repectively
by a protective fuse and a protective
resistor. If the fuse blows, the meter
will display approximately zero. A fuse
test is shown under “OPERATOR
MAINTENANCE ”
For measurements up to 10A, use the
10A and COM terminals. The 10A and
COM terminals may also be used for
measurements between 10A and 20A
for up to 30 seconds. Exceeding 30
seconds or 20A may damage your
meter.