Clemente, Thanks, that did the trick!! It was a bit tricky getting it adjusted so that the bellows wouldn't over compress but we worked it out. Guess I have to get back to running samples now. Best Wishes, Margaret At 04:43 PM 11/25/96 +0100, you wrote: >Dear Margaret, > >We have SITRA mass specs, but I believe that the bellows are identical. >If so, you have to adjust the two little flags attached to a rod by the >bellows. All you need is a small allen key and a little bit of paticenence. > >Actually, to adjust the maximum to 4500 is not important; the computer >will not care about the number. The important thing, however, is that the >motor does nort force the bellows too much when opening them, or they could >be damaged. We recently repalaced the sample bellows and had exactly that >problem. Adjusting the flags should prevent it happening. > >Cheers, > >Clemente > > ------------------------------------------------- Margaret Lansing U.S. Dept. of Commerce National Oceanic & Atmospheric Administration Great Lakes Environmental Research Laboratory 2205 Commonwealth Blvd. Ann Arbor, MI 48105 313-741-2289