3.Making Measurements
16
Measuring Temperature
(1)
Rotate the rotary switch to
.
(2)
Connect the
red
connection
of the K-type thermocouple to the
terminal
(
on B41T(+) ) and the
black connection
to the
terminal.
(3)
Probe the test points and read the display. Press
to change the temperature
units between
or
.
Measuring DC or AC Current
Warning: Never attempt an in-circuit current measurement where the
open-circuit potential to earth is greater than 250 V. Doing so will
cause damage to the multimeter and possible electric shock or
personal injury.
Caution:
To avoid possible damage to the multimeter or to the equipment under
test, check the multimeter’s fuse before measuring current. Use the
proper terminals, function, and range for your measurement. Never place
the test leads in parallel with any circuit or component when the leads are
plugged into the current terminals.
Current ranges are 600.0
µ
A, 6000
µ
A, 60.00 mA, 600.0 mA, 6.000 A, and 20.00 A.
(1)
Turn off the power of the measured circuit. Discharge all high- voltage capacitors.
(2)
Connect the black test lead to the
terminal. For currents below 600 mA,
connect the red test lead to the
terminal (
on B41T(+) ); for currents
within 600 mA – 20 A, connect the red test lead to the
terminal.
(3)
Rotate the rotary switch to the appropriate position according to the measurement
range,
,
,
or
.
(4)
Disconnect the circuit path to be tested. Connect the black test lead to one side of
the circuit (with a lower voltage); connect the red test lead to the other side (with a
higher voltage). Reversing the leads will produce a negative reading, but will not
damage the multimeter.
(5)
Select DC or AC measurement mode. Default is DC measurement mode,
will
be displayed. Press
to switch into AC measurement mode,
will be
displayed.
(6)
Turn on the power of the measured circuit, and read the display. Press
to
enable and cycle through the manual ranges. If "
OL
" is displayed, it indicates the
