BNC 1201 - 6 1/2 Digit Digital Multimeter - Manual (Page 105)

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Figure 4-35
4.4.10 Firmware Revision
1201 has three microprocessors for various internal systems. You can
query the multimeter to determine which revision of firmware is installed
for each microprocessor.
How to check the firmware revision
Press MENU and then use ◁ and ▷ to locate “SYSTEM” submenu. Press
ENTER to select it. Again use ◁ and ▷ to locate “REVISION” option.
Press ENTER to select it. The multimeter gives three numbers in
xx-xx-xx format on the display. The first number is the firmware revision
number for the measurement microprocessor; the second number is for
I/O processor and the third number is for the front-panel processor. The
locations of the buttons are shown with red rectangle frames in Figure
4-36.
Figure 4-36