87
V5.1
‐
March
2010
M
EASURING
DC
C
URRENT
To measure a DC current lower than 400 mA, do the following:
1. Insert the black lead into the
COM
banana jack input and the red lead into the
mA
banana jack input
2. Use
the
A
key and the
SET
key as needed to select the DCA mode (the
DCA
symbol will appear at the top of the screen
3. Ensure that the displayed unit of measure on the main reading screen is
mA.
Use the
F4
soft-key to select
mA
if necessary.
4. Connect the red and black leads to the measured points on the circuit under test;
the DC current value will be displayed on the screen.
Refer to the example diagram in Figure 8.
Figure 8: 400mA DC Current Measurement
To measure a DC current larger than 400 mA, perform the following:
1. Press
the
A
key and the
DCA
symbol should
appear at the top of the screen.
Use the
SET
key to select
DCA
if necessary.
2. Press
the
F5
soft-key to select the 10A measurement mode, the unit of measure
on the main reading screen should be
A.
3. Connect the red and black test leads to the measured points on the circuit under
test; The
DC
current value will be displayed on the screen.
4. Press
the
F4
soft-key to
return to the
mA
measurement mode
Refer to the example in Figure 9.
Summary of Contents for HOS-MS420
Page 11: ...10 V5 1 March 2010 FRONT PANEL AND KEYPAD OVERVIEW Figure 3 ...
Page 32: ...31 V5 1 March 2010 Figure 20 AC Coupling ...
Page 72: ...71 V5 1 March 2010 Fig 42 Rectangle window Fig 43 Blackman window Fig 44 Hanning window ...
Page 79: ...78 V5 1 March 2010 ...
Page 85: ...84 V5 1 March 2010 Figure 4 Continuity Test ...
Page 89: ...88 V5 1 March 2010 ...
Page 91: ...90 V5 1 March 2010 Figure 10 400mA AC Current Measurement ...
Page 95: ...94 V5 1 March 2010 ...