380900-EN v3.1 07/13
7
TTL Frequency and Duty Cycle Measurements
1. Set the Channel 1 function switch to the
mV/TTL
position.
2. Press the SHIFT key momentarily to select the TTL
function.
3. TTL Frequency and Duty Cycle will be displayed
Diode Test
1. Insert the black lead into the negative
COM
jack and the red
test lead into the positive jack.
2.
Set the function switch to "
CAP
" position.
3. Press the SHIFT key momentarily to select the diode
function.
4. Touch the test probe tips to the diode or semiconductor
junction you wish to test. Note the meter reading.
5. Reverse the test lead polarity by reversing the red and black
leads. Note this reading.
6.
The diode or junction can be evaluated as follows:
A. If one reading displays a value and the other reading
displays "OL", the diode is good.
B. If both readings display "OL", the device is open.
C. If both readings are very small or 0, the device is shorted.
Dual Channel Voltage Measurements
Warning
: Both channels share the same ground. Voltages with different grounds cannot be
measured.
Note:
Functions may take longer to execute when in the dual channel mode.
1. Insert the black test lead into the negative
COM
jack and the red test leads into the input jacks for
Channel 1 and Channel 2.
2. Set the Channel 1 voltage function: "
VAC
",
"
VDC
", "
mVAC
", or "
mVDC
".
3. Set the Channel 2 voltage function: "
VAC
",
"
VDC
", "
mVAC
", or "
mVDC
”.
4. Connect the test leads in Parallel to the circuit to
be measured.
5.
Read the voltage measurements on the display.
V1
V2
