HELP.....WITH OLDER RESMED-SULLIVAN SETTINGS

I have on older cpap machine the: RESMED-SULLIVAN V LIGHTWEIGHT which i would like to use as a back-up and travel etc. i got it around 1998 and i think it was the basic machine the DME'S gave out at the time. i have a new auto machine now but to use the resmed sullivan v as a back-up i need to change (LOWER) the pressure setting as my most recent sleep study indicated a much lower pressure setting! It was set at 17.
can anyone of the GREAT people on this site tell me HOW TO DO THE PRESSURE CHANGE SETTING ? Would appreciate it very much if someone could help!

THANK YOU IN ADVANCE,
guest101

u should go where u got the new machine and get the pressure set. Setting the pressure is easy but need to be read to make sure the out put its correct.

Sleep less:

Thank you for your help! I will do what you say, i guess that's the only way as there is no (LCD) window.

Have a great day , many thanks!

Guest101