Check sum reading?

[TiredBoy]

Hi all.

Does anyone know what the Check Sum reading on the Fisher and Payker Sleep Style 232 means? I wasn't paying much attention initially, as it was a reading that didn't say what it was, it just had a key logo next to a number. I had to look it up on the internet manual to see what the reading was. The manual states, -

*Checksum - Displays information for medical practitioner or dealer use to check compliance.

I have been having less and less problems with mask etc. About 5 or 6 nights being able to use CPAP for over 7 hours per night, with my average reading now reaching 5.9 hours per night! However, I haven't been feeling particularly refreshed, and so I was wondering if it was doing it's job?

As my mask issues were resolving, I started looking at my readings more. For the last 3 nights (I don't know what the readings before that were), this Check sum has read 11, 21, and then 46 last night. What does this mean? I'm obviously getting concerned about compliance. Any knowledge of this Checksum reading, or failing that any thoughts?

TB

[Grumpy]

Checksum

Checksums (in the IT world) are usually used to check that data hasn't been tampered with or become corrupt; so I suspect that the numbers aren't relevent to you.

As a simple example take a few numbers; say 4,7,3,8,2
and make a simple checksum by adding up all the numbers and just keeping the last digit; which is 4 in this case. Now 'corrupt' one of the numbers and you will see that this is spottable by comparing checksums.

[TiredBoy]

Thanks Grumpy

I'll try to stop worrying. I just get a bit worried about compliance as it's my livelyhood gone if I loose my licence.

TB