Tektronix TekScope THS710A

Power-Measurement Application Examples
THS710A, THS720A, THS730A & THS720P User Manual
2–51
Setup to Trigger at 1200 RPM
S
CO
PE
CH 1 — — —
CH 2 Probe Type Current
Probe
Set to
100 mV/A
HORIZON-
TAL MENU
Trigger
Position
50%
—
TRIGG
E
R
NU
Trigger Type Pulse
ME
NU
Trigger
Source
Ch1
Polarity and
Width
Positive Set width to
250 s
Trigger When Equal To
Width
Set ±5%
Mode Normal —
CURSOR Cursor
Function
Paired Set cursor to
horizontal
center of
graticule
Set appropriate VOLTS/DIV for each channel. Set SEC/DIV so that
the sweep duration is approximately equal to the motor start-up time.
When the motor starts, the 1200 RPM point is displayed at the center
of the graticule. Use the cursor on channel 2 to measure the armature
current at this point.
Going Further
Change the trigger pulse width setting to trigger at other specific
motor RPMs to complete the test.