Measuring Dc Current - Fluke 187 User Manual

Model 187 & 189
Users Manual

Measuring DC Current

To measure dc current, set up the meter as shown in
Figure 3-12.
You can view separate dc and ac amps signal
components.
Press once to display ac current in the primary
display and dc current in the secondary display
(ac over dc).
Press a second time to reverse the displays (dc
over ac).
In either of these states, the following pushbutton
functions are not available:
Display hold ( ).
AutoHOLD (
MIN MAX ( )
FAST MN MX (
Hz ( )
Relative ( )
LOGGING and SAVE (Model 189)
3-20
)
)
Press a third time to display the ac + dc rms value
in the primary display. (FAST MN MX is unavailable in
this state.)
Press a fourth time to return to the normal dc
display.