Checking For Leaks - Thermo Scientific TRACE 1600 Hardware Manual

Checking for Leaks

Thermo Scientific
Note The standard outfit kit for the Instant Connect Helium Saver Injector Module is
equipped with SilFlow ferrules having internal diameters of 0.50, 0.40, and 0.35 mm.
If you are using a 0.32 mm id column, use the 0.50 mm i.d. ferrules supplied.
If you are using a 0.25 mm id column or smaller, use the 0.35 mm id ferrule if the column
will pass through it.
This will allow easy finger tightening of the ferrule using the hand tool without undue
torque. In other words, use the smallest ferrule that will fit your columns.
The ideal situation is when the column passes through the hole with slight pressure.
The replacement Thermo part numbers are as follows:
• 0.50 mm ferrule 10ea. 29063467 (for 0.32 columns)
• 0.40 mm ferrule 10ea. 29063466 (for 0.25 columns and smaller on the high end of
the o.d. tolerance)
• 0.35 mm ferrule 10ea. 29063465 (for 0.25 columns and smaller on the low end of
the o.d. tolerance).
Tip When installing the column, nut and ferrule, lift up slightly on the ceramic insulator
surrounding the base of the injector insert as shown in figure.
This will expose the end of the insert and make it easier to locate the column in the central
hole.
After the final trimming and installation of the column, make sure to pull the insulator
back to its lowest position.
A hand held helium leak detector may be used to check for helium leaks around the inlet and
column connection. With the helium conservation enabled, approximately 4 mL/min of
helium will enter the injection port.
For maximum sensitivity of the leak detector, set the split flow to Off during leak check.
This results only in column and septum purge flows.
9
Adding Modules
Adding a Helium Saver Injector Module
TRACE 1600/1610 Hardware Manual 491