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Instrument > Varian GC 3900
Varian GC 3900
Delivered on 6/11/02, Installed on 6/12, 13/02 Top
CG: Model 3900, S/N: 748 Autosampler: CP-8410, S/N: 20761 Computer:
Dell Optiplex 150/Win 98 Top
Missing parts: Power cord for GC, cross cord (Ethernet cable
and hub) Noted on installation sheet and ordered by CL. Top
Sales: John Raffa (800)926-3000, ext. 3046 Service: Cliff Leavitt,
ext. 4098 Top
Special Attention This section is important since the software
offers limited validity check and safety guards. Wrong setups will
be accepted and the instrument harmed without warning.
Column flowrate. Set at 2 to 3ml/min for capillary columns.
How to set up splitless injection: time, status and split
ratio: initial, on, 10; 0.01, off, off; 0.75, on, 100. Shut
off split all together will leave junk on the injector port.
Detector makeup gas: Helium 25ml/min; Hydrogen 30; Air 300;
time constant should always be FAST.
Data Acquisition: Detector Bunch Rate should be 1point.
Gas Supply to GC at the regulator exit: Hydrogen: 40psi, Air:
60psi, Helium; 80psi
Leave detector on and hot when the GC is shutdown, makeup
gases should be turned off. Turning detector on and off frequently
can reduce the lifetime of the seal.
Oven should not be totally turned off when not in use. Leave
it at 50oC. Otherwise, fans get crazy. Top
Standard sample for performance: Varian Test Samples for
FID. P/N 82-005048-07 1-ml ampules tetradecane, pentadecane, hexadecane
at 30ng/ul each in isooctane inject splitless. Look for the three
Regular maintenance work:
Bake column once a while depending on frequency of use. Say
once a week. The more frequent, the cleaner the column.
injector septum lifetime: about 50 injections.
injector liner changed as needed. Top
Streaming video demo is available soon for software instructions.
Copy of service sheets Top