User Manual
The input of the electronic load will be 
turned off automatically if the OCP
value is lower than the actual current 
value. The default OCP setting is 30 A.
NOTE
OCP function (OCP)
Press the   key, then press the
key. The display will show 
OCP (Over Current Protection). This 
is the maximum current that will be 
allowed. Use the  and
keys and the knob to set the 
value.
ShiftShift
AA
BB
View
C
Change the displayed values
The electronic load usually displays the 
actual voltage and current values. 
Press the    key to display the 
preset voltage, current or resistance 
value and the actual power. Press the  
f  key again to return to the 
current/voltage display.
View
C
View
C
Input on/off
The load can be toggled on and off by 
pressing the key. The 
programmed setting is not affected. 
The OFF LED will be lit when the load 
is off.
On/OffOn/Off
Recall
CC
Short CV 
OFF
Shift
30A
CR
A
B
C
D
Set
V
W
A
150W DC Electronic Load
8540
CC
Short CV 
OFF
Shift
30A
CR
A
B
C
D
Set
V
W
A
150W DC Electronic Load
8540
Recall
Recall
CC
Short CV 
OFF
Shift
30A
CR
A
B
C
D
Set
V
W
A
150W DC Electronic Load
8540
REL function (rEL)
After setting OCP, press   to enter 
the REL setting. Use the knob to select 
ON or OFF. The default is OFF, which 
means the display will show your set 
value on the top display while you make 
adjustments. It will then blink for 2 
seconds before toggling the display to 
show measured voltage. If users want to 
adjust the set value using knob while see 
the measured voltage and current 
simultaneously without interruption, 
select ON. 
View
C










