Amprobe 38SW-A, Руководство пользователя

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5
Measuring DC Current See Figure -4-
1. Set the Function Switch to a current function, µA , mA , or 10A .
2. If AC or AC+DC is displayed, press the yellow button to turn on DC .
3. If the µA function is selected and RANGE is displayed, press the RANGE button
to enable autoranging.
4. Connect the Test Leads: Red to mA or 10A , Black to COM .
5. Turn off power to the circuit being measured.
6. Open the test circuit ( X ) to establish measurement points.
7. Connect the Test Probes in series with the load (to the measurement points).
8. Turn on power to the circuit being measured.
9. Read the display, and, if necessary, correct any overload (
o
or
- o
) conditions.
Measuring AC or AC+DC Current (True rms) Figure -3- & -5-
See Additional Features to find out the advantages of true rms.
1. Set the Function Switch to a current function and range, µA , mA , or 10A .
2. If DC is displayed, press the yellow button to turn on AC or AC+DC .
3. If the µA or mA function is selected and RANGE is displayed, press the RANGE
button to enable autoranging.
4. Connect the Test Leads: Red to mA or 10A , Black to COM
5. Turn off power to the circuit being measured.
6. Open the test circuit (
X
) to establish measurement points.
7. Connect the Test Probes in series with the load (to the measurement points).
8. Turn on power to the circuit being measured.
9. Read the display, and, if necessary, correct any overload ( o ) conditions.
Measuring Resistance See Figure -6-
1. Set the Function Switch to
Ω
.
2. If
R
is displayed, press the yellow button to display
Ω
.
3. If RANGE is displayed, press the RANGE button to enable autoranging.
4. Connect the Test Leads: Red to
E
, Black to COM
5. Turn off power to the circuit being measured. Never measure resistance across
a voltage source or on a powered circuit.
6. Discharge any capacitors that may influence the reading.
7. Connect the Test Probes across the resistance.
8. Read the display. If
o
appears on the highest range, the resistance is too large
to be measured.