Hioki 3801-50 - Pulse Output Function

30
2.9 DUTY Ratio Measurement
The duty ratio is the ratio between the pulse width and the
pulse cycle. This instrument displays this ratio in terms of
100 (%).
Plus slope duty ratio (D+): D+ = tw
+
/T × 100 (%)
Minus slope duty ratio (D-): D- = tw
−
/T × 100 (%)
2.9 DUTY Ratio Measurement
T
t
Plus slope pulse width
Minus slope pulse width
Pulse cycle (=tw
+
+ tw
-
)
0 V
tw
-
tw
+
The bar graph conforms with voltage measurement or
current measurement.
1.
Set the function switch.
❖ See Section 2.2 Voltage Measureme
nt
(page 19)
❖ See Section 2.3 Current Measureme
nt
(page 21)
❖ See Section 2.8.2 Frequency Counter Me
a-
surement (page 29)
2. Use the SHIFT key to select eith
er
DC, AC, or AC+DC.
Otherwise, select the Hz count
er
(one cycle).
3. Use the Hz key to select the DUT
Y
ratio.
4. Connect the test leads to the test te
r-
minals.
5. Read the value displayed in th
e
main display.
To switch the pulse slope polarity ,
hold down the SHIFT key.
Duty ratio cannot be measured if the Hz
counter (100 cycles) is selected.
SHIFT
AC DC
AC+DC
Hz
<Example>
When measuring AC voltag
e
(% lights)