Thermo Electron 3940 Series, Operating And Maintenance Manual

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1. Press the Up and Down Arrows at the same time and hold them for
about three seconds. The words “inpt” (input) and “set” will appear in
the top and bottom displays. (Figure 4-4) If numbers in the bottom
display begin to scroll up or down, the keys have not been pressed
simultaneously. Try again.
2. Press the Up Arrow until “gLbL” (global) appears in the upper display.
The word “set” will remain in the lower display (Figure 4-5).
3. Press the Mode key to scroll through the menus until the lower
displays show “Loc” (Figure 4-6). Press the Down arrow key until the
“2” becomes “0” (zero) as shown in Figure 4-7.
4-4 Model 3940 Series Thermo Electron Corporation
Section 4
Service
Remove Software Lockout
Figure 4-5. Global and Set Appear
Figure 4-4. Input and Set Appear
Figure 4-7. Change 2 to 0
Figure 4-6. 2 and Lock Appear