Injector Duty Monitor

[steve ravet]

Bruce Plecan wrote:

> 
> Which reminds me when I try to look at anything, I get a drop down box, and
> asked what viewer,  what do I select?.    The options are like excel, cs,
> cdphoto,
> etc..
> Thanks
> Bruce

Depends on the file type.  For most of the files on the FTP site, you
just select "save to disk" or something like that and tell it where to
save it.  Netscape asks you that when it sees a file type that it
doesn't know how to display (like .zip, .exe, others).  If you download
and install winzip (like from www.shareware.com) it'll "register" the
.zip extension, so the next time you click on a .zip file netscape will
know to run winzip for it.  Same with .pdf if you install acrobat
reader, etc.

As far as reading duty cycle, couldn't you make up a circuit with an
opamp buffer, and a resistor/capacitor to filter the signal, then read
the voltage with a digital voltmeter?  0v=0%, 12v=100%?

Or, just go buy a cheap analog voltmeter with a needle.  It's reading
will vary from 0-12 depending on duty cycle.

--steve

> 
> Hi
> 
> I have some time ago posted a file to the ftp site in the incoming
> directory.The name of the file is pwmeter.zip
> 
> It  measures the on time of the injector in milliseconds to 0.1 ms
> resolution if I remember correctly.Resolution could be increased.
> 
> If somebody is willing to give me some idea or specification or an
> example of what needs to be measured, I could change the code to do
> this.
> Is this referenced to rpm or is it just the on versus off time
> of the injector.
> 
> Regards
> Georg
> Georg Lerm
> Chief Technician
> Clinical Engineering
> Red Cross Hospital
> Cape Town
> South Africa
> Tel. +27 21 658-5120
> Fax. +27 21 658-5120