Tips for measuring capacitance
39
38
•
In capacitance, the Meter is always
a u t o r a n g i n g .
•
In 40 nF r ange, the readings ar e
probably unstable due to envir on-
mentally induced electrical noise and
floating capacity of the tes t leads .
Therefore, directly connect the object
to be measured to the input terminals.
Current (
,
,
) Measurements
Current is the flow of electrons through a conductor. To measure current, you must
open the circuit under test, then place the meter in series with the circuit.
The available current ranges are :
400.0 µA, 4000 µA, 40.00 mA, 400.0 mA, 4.000 A, and 10.00 A
The meter defaults at
d c
.Press
S E L E C T
button momentarily to select
a c .
To measure dc or ac current,
1 . Turn off power to the circuit and discharge all high-voltage capacitors.
2 . Insert the black lead into the
C O M
terminal and the red lead into an input
terminal appropriate for the measurement range as the following table.
To avoid blowing the meter’s 440 mA fuse, use the mAµA terminal only if you are sure the
current is less than 400 mA.
3 . Open the current path to be tested. Touch the red probe to the more positive
side of the break and touch the black probe to the more negative side of the
break. (Reversing the leads will produce a negative reading, but will not damage
the meter.)
Warning
Never attempt an in-circuit current measurement where the
open-circuit potential to earth is greater than 1000V. You may
damage the meter or be injured if the fuse blows during such
a measurement.
Caution
Check the meter fuses before measuring current. Use the
proper terminals , functi on, and range for c urrent
measurements. Never place the probes in parallel with any
circuit or component when the test leads are plugged into the
current terminals.
Range
Ranges
Input
mAµA
mAµA
10A
400.0 µA, 4000 µA
40.00 mA, 400.0 mA
4.000 A, 10.00 A
