Function
and Features
Copyright ©ITECH Electronic Co., Ltd.
31
specification ranges and dynamic range of equations of
oeff
o
d
o
C
I
R
V
=
,
oeff
d
o
o
C
R
V
I
=
and
d
o
o
oeff
R
V
I
C
=
. For example, select range to Vo-L and
complete setting of Vo and Io. When Io/Vo equals to 1, the set value of Coeff is
affected by both Coeff specification rang and Rd range. Actual set value ranges
from 0.08 to 1. The user cannot set any value between 0.01 and 0.08.
3.16 Measurement rise time For voltage
The IT8912E electronic load is provided with special voltage rise/drop time
measurement function. This function gives a simple analog of voltage rise/drop
speed of oscilloscope test power.
Operation methods:
1. Set initial voltage and final voltage
a) Press
[Shift]
+9 keys to enter configuration menu. Press Right key.
Select
“Measure” and press
[Enter]
key.
b) Press
to select
“TimeV1”. Press
[Enter]
key. Press numeric
keys to set initial voltage value and press
[Enter]
key.
c) Press
to select
“TimeV2”. Press
[Enter]
key. Press numeric
keys to set final voltage value and press
[Enter]
key.
d) Press
[ESC]
to exit setting.
2. Start timer function
a) Press
[Shift]
+8
keys to enter system menu. Press Right key till “Displ”
flicks and press
[Enter]
key.
b) Press
key to select “On”. Start timer function and press
[Enter]
key.
c) Press
[ESC]
to exit setting.
3. VFD second line will display time 0.0000S between power value and set
value.
OFF CC
0.0001V 0.0002A
0.00W 0.0000S CC=0.000A
4. Measurement of rise time
5. Connect DC power to be tested to the input terminal of the electronic load.
The power is set with a value that is higher than the set final voltage value.
Keep power output in OFF status.
6. Set a constant current value on the load and open the load input.
7. Open power output.
8. The electronic load timer starts timing. After ending, time will keep stable,
which is rise time of voltage.
9. Close the power output. The electronic load VFD will display voltage drop
time.
3.17 VON function
When testing some power products with slow voltage rise speed, if the
electronic load input is opened before power, the power may latch protection. In
this way, the user may set VON value. The electronic load only latches when
power voltage is higher than this value.
