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3700 SERIES USER MANUAL
3700 Series Programmable DC Electronic Load
VERSION 2.0 2006.03
7
(2) If the keyboard is locked
Step1. Press “ I-set ” button,
Step2. Enter the password by using the number keyboard,
Step3. Press OK button (if the password is wrong, please go to step2 for reentering),
Step4. Rotate the Rotary to change the value，the operation is the same as item (1)
Step5. Press “ I-set ” button to confirm the current value.
2.2.2 Constant Power Mode
In constant power mode, the load’s current will increase automatically if the input voltage is decreased or vice
versa, so that the electronic load will sink a constant power in accordance with the set value. The power value can be
set with the keyboard and/or rotary knob. Please see the following operation procedure:
Constant power setting procedure:
Procedure Operation details LCD display
Step 1 Press “P-set” Input Password
Step 2
Enter the password (if the keyboard isn’t locked, please go to
step4)
Input Password
****
Step 3
Press the “OK ” button, the original set value will be displayed
on the LCD. (It will return to step 2 if your password is wrong)
Set Power = 20.0W
New=
Step 4
Enter the new power value with the number keypad or rotate
the dial to adjust the value
Set Power = 20.0W
New= 30.0
Step 5
Press “P-set” button for confirmation Set Power = 30.0W
New= 30.0
Step 6
Press ESC to go back to the main menu
You can exit the power set operation at any point by pressing the ESC key
2.2.3 Constant Resistance Mode
In constant resistance mode, the electronic load will sink a current linearly proportional to the input voltage in
accordance with the set value. The resistance value can be set with the keyboard and/or rotary knob. Please see the
following operation procedure:
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