ITech IT8811 - 3.2.4 Constant Power Operation Mode (CW)

Function and Features
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3.2.4 Constant power operation mode (CW)
Under CW mode, the electronic load will consume a constant power, as shown
below. If input voltage rises, the input current decreases and power P (= V * I)
will maintain at setting power. As shown in Fig. 3-4.
Fig. 3-4 Voltage-Current Relation Schema under CW Mode
Under CW mode, the electronic load provides three ways to modify constant
power.
 Rotate adjusting knob to set constant power value.
 Use numeric keys to input power value and press [Enter] key to confirm set
constant power value.
 Use
moving cursor and press to adjust values at
corresponding positions.
Operation steps
1. Press [CW] key and [Shift] + [CV] to enter parameter setting screen.
Constant Power
Range=400.00W
2. Set maximum working power value and press [Enter] for confirmation.
Constant Power
Range =300.00W
3. Set maximum voltage value and press [Enter] key.
Constant Power
High=130.00V
4. Set minimum voltage value and press [Enter] key.
Constant Power
Low=0.000V
5. Complete parameter setting.
10.0000V 0.0000A
0.00W CW=1.00W
NOTE
If the above method is for editing auto test step (as mentioned below), constant
power range can also be set.
Input
voltage
Load current
V
I
Set power
V
2
V3
I2
I3
CW mode