GW Instek GDM-8245 - Manual (Page 9)

DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
14
5. MEASUREMENT TUTORIAL
5-1. Voltage measurements (DCV, ACV, DCmV, ACmV)
1).Press the button to select desired function.
2).Press [▲]or[▼]to the desired range (if you have no idea about the
value of input, we suggest you always start at the highest range).
Press [AUTO/MAN] button for manual or auto-ranging selection.
3).Connect the test lead to the V and COM input terminals of the
instrument.
4).Connect the test lead to the measuring points and read the displayed
value.
NOTE: After measuring high voltage to 1000V dc, errors may
occur when the 100μV is measured. Allow up to one minute
prior to making low-level measurements
5-2. Current measurements (DCA, DC 20A, ACA, AC 20A)
1).Press the button to select function.
2).Press [▲]or[▼]to the desired range.(if you have no idea about the
value of input. we suggest you always start at the highest
range).Press [AUTO/MAN] button to change manual or auto-
ranging.
3).Connect the test lead to the 2A or 20A and COM input terminals of
the instrument.
4).Connect the test lead to the measuring points and read the displayed
value.
DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
15
5-3. Resistance, capacitance, continuity beeper measurements
1).Press the button to select function.
2).Press [▲]or[▼]to the desired range. Press [AUTO/MAN] button to
change manual or auto-ranging.
3).Connect the test lead to the Ω, and COM input terminals of
the instrument.
4).Connect the test lead to the measuring points and read the displayed
value.
5-4. Diode test measurements
1).Press the button to select function.
2).Connect the test lead to the and COM input terminals of the
instrument.
3).Connect the test lead to the semiconductor junction (diode or
transistor) as shown in Figure 5-1,and read the displayed value.
z Figure 5-1
Connect to Connect to
“ ” “COM”
terminal. terminal
5-5. dBm measurements
This function converts a voltage measurement into dBm. The function
can be selected only when a voltage function (volts ac, volts dc, or
volts ac+dc) is selected. Press [dBm] button, the secondary display
shows the dBm value that reposed on the voltage value showed in the
primary display.