8060A
Instruction Manual
2-16
2-16. AC/DC Current (A)
Selection of the ac or dc current (A) function is described is Figure 2-10. The
8060A offers five ac (true rms ac-coupled) and five dc current ranges: 200
µ
A, 2 mA, 20 mA, 200 mA, 2000 mA. Each range is protected by a
2A/250V fuse in series with a 3A/600V fuse.
When a meter is placed in series with a circuit to measure current, you may
have to consider an error caused by the voltage drop across the meter (in this
case, across the protective fuses and current shunts). This voltage drop is
called the burden voltage. The maximum full-scale burden voltages for the
8060A are 0.3V for the four lowest ranges and 0.9V for the highest range.
These voltage drops can affect the accuracy of a current measurement if the
current source is unregulated and the resistance of the shunt and fuses
represents a significant part (1/1000 or more) of the source resistance. If
burden voltage does present a problem, you can calculated the error by using
the formula in Figure 2-11. You can minimize this error by selecting the
highest current range that provides the necessary resolution.
2000mA
2000nS
A
A
COMMON
V Ω S
V
Ω
S
200mA
200
200k
200µA
DC
AC
Hz
200mV
200Ω
20mA
20
20k
2mA
2
2k
1000 DC
750 AC
MΩ
Hz
dB
REL
1000V DC
750V AC
MAX
2A MAX
500V MAX
!
!
Low (-)
Current (A)
High (+)
1. Select a range.
2. Set AC/DC switch out
for DC, in for AC.
3. Push both switches at the same
time to select current function.
4. Ensure all other switches are out.
5. Connect the test leads as shown.
6. Heed the input overload limits (Table 2-2)
and connect the test leads to the circuit being
measured.
7. Read the measured value on the display.
dx11f.eps
Figure 2-10. Current Operation
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