B&K Precision 8500-8526 - Manual - Manual (Page 73)

Enter again. Now the password is cleared. Press Esc to exit the menu
To unlock the other DC load models, use the following unlock keys:
Model number Unlock key code
8500 8512
8502 8512
8510 8513
8512 8513
8514 8514
8518 8518
8520 8516
8522 8516
8524 8518
8526 8518
Frequency Asked Questions
Q: I cannot communicate with the instrument with my PC.
A: Check that the baudrate, address, and parity settings are configured correctly. The baudrate
and address settings inside the instrument menu (Accessible under Config menu; see Menus
section for details) must match the configurations of your computer's software interface, such
as the PV8500 software. If you are using the IT-E132 TTL to USB adapter cable, be sure to
check from “Device Manager” in Windows to verify the COM port to which the adapter is
assigned to.
Q: My load is rated for 30 A, but I cannot seem to adjust the current beyond 15 A.
A: The 8500 series has a user configurable input limit protection that can be set from the front
panel. To verify and edit these settings, press Shift + 0 to access the menu, then use the arrow
keys or rotary knob to select SYSTEM SET menu. Press Enter, and there will be menu options
for MAX CURRENT SET, MAX VOLTAGE SET, and MAX POWER SET. Respectively, these
parameters set the maximum input current, voltage, and power limit to the load. They must be
set higher than the value that you want to set in your application. Verify and change MAX
CURRENT SET, and you should be able to set to a higher current value. Be sure to press Enter
after you change the values so that the changes get saved. Also, note that MAX POWER SET
takes priority in limiting the input. For example, suppose you are using 8500, rated for 120V,
30A, 300W, and your MAX POWER SET = 100 W. You want to run CC mode and sink 5 A from a
source that has 50 V. Even if your MAX CURRENT SET = 30 A and MAX VOLTAGE SET = 120 V,
the load will limit your maximum settable current to 2 A. This is because the configuration for
maximum power limit is set to 100 W. For a 50 V source, 2 A of current will have reached the
100 W limit.
8500 DC Load Series Version: 030614 Page 73 of 77