Sanden SN3500, Installation Manual, Page: 76 / 150

Appendix A: Post-Installation Procedures
82005-IM-K Sandel SN3500 Installation Manual Page 7-26
To calibrate minimum brightness, set aircraft to NVIS OFF and do the following from
BRT maintenance page. Please note: The maintenance page always displays at 100%
brightness. You need to exit MAINT by pressing and holding the left knob to see the
resulting brightness adjustment.
1. Select “Min Brt V Norm” with up/down arrow keys
2. Set the aircraft external brightness bus at the desired night-brightness voltage. This
voltage will be displayed on-screen.
3. Press “SET” softkey. This will set Vzero (see graph below) at the current bus voltage
minus 2.00 volts
4. Exit MAINT by pressing and holding the left knob and check the brightness balance
with the rest of the cockpit. If you need further adjustment, re-enter BRT maintenance
page by pressing and holding the left knob and trim the “Min Brt V Norm” setting using
“+/- softkeys. A lower voltage setting number will INCREASE the brightness.
Repeat steps 1,2,3,4 with external NVIS selected
NOTE: From this point on the pilot will be able to trim the minimum brightness, if
desired, using the ‘M’ button to enter the pilot’s menu.