B&K Precision 393 - Manual - Manual (Page 14)

14
2.3 DC and AC Current Measurements
Turn the rotary switch to the corresponding symbol for the
measurement you would like to perform.
Current measurements can be made in low current or high
current mode. In low current measurement mode, you can
measure up to 400 mA. Connect to the low current mA terminal
and select one of the two ranges. In high current measurement
mode, you can measure up to 20 A by selecting one of the two
ranges and connecting to the 20 A input terminal.
DC Current ranges: 600 uA (low), 6000 uA (low), 60 mA (low),
400 mA (low), and 20 A (high).
CAUTION:
Always connect the test leads to the instrument
inputs first before connecting the DUT to avoid
potential shock hazard.
Low Current Measurements (< 400 mA)
Follow these steps to make measurements < 400 mA.
1. Connect the negative (-) side with the black test lead to
the COM input.
2. Connect the positive (+) side with the red test lead to
the mA input.
3. Probe with the test leads to the DUT and take the
measured reading on display.
Figure 3 - Connection for Low AC or DC Current Measurement
20 A uAmA COM V.Ω
AC or DC Current
+ -
A