Pegasus III, Priority diagnostic screen

[walshbig]

I am using pegasus III with Chromatof 2.00 (pegasus driver 2.11). Recently results are not as accurate as before and I need to do a litle adjustment to gain and offset. There is no local Leco office in my country. Leco person was kind enough to gave me the key sequence for priority diagnostic screen when he paid us a visit after the confference and he told me all neccessary points not to make any harm. This was a few years ago. I almost never used it except twice a few years ago and now I lost it and don't remember it. Anyone remembers what was it?
Any description of it may help me to remember.

[walshbig]

I am also interested in this. We are using the same instrument.

[steverb]

Some one told me pegasus III has no longer priority diagnostic screen since it does channel board gain and offset adjustmants automatically and no need for manual adjustment and no need for priority diagnostic screen. Even so I would like to be able to enter this screen if it exist in pegasus III.

[Don_Hilton]

Most or at least many of the features that people wanted to access in the priority diagnostics screens have been moved to screens easily available to the user in the more recient upgrades of ChromaTOF. (The screen needed for diganosis and automatic major adjustment of the automatic gain and offset adjustments on the chanel card require special access - but when you need this screen, you probably need to be talking with LECO about what to do with this very expensive card anyhow. LECO has the capability of accessing your instrument if the instrument can use a modem or internet connection, in which case, LECO can do the diagnostics and make the adjustments.)

If you need to make a "little" adjustment in gain and offset, this is what the "Acquisition Adjust" optimization step does, and this should be run as a normal part of the optimization sequence. I run the full optimization every day or two. Others may run this as infrequently as once a week.

[steverb]

Our pegasus III manual says R137 potentiometer on the channel board is for offset adjustment and R136 potentiometer is for gain adjustment and these should be adjusted for the profile of mass 69 to be gaussian but in our pegasus III there is no potentiometer on the chennel board. I am surprised why equipment is shipped with a non updated manual. So the only way of adjusting offset and gain is via "priority diagnostic screen". I tried to do this adjustments from the software QC pane but after 10 minutes data collection stoped and software said "Gain adjustment timed out". For a new instrument for the first time power up (like our case) it looks coars adjustments should be done via "priority diagnostic screen" and for the fine adsjustment operator should check "acquisition system adjustment - see section B". Am I right?

I don't think I can get any signal out of the channel board Unless coars adjustment of gain and offset to be done correctly and this needs access to priority diagnostic screen. In my place Internet usage only is limitted to a particular rooms and rooms are monitored for the computer users not to access filtered sites. So I have no choice except to try contacting Leco via email which I have done already and I am hoping for a positive response from them.