6-25
Matec Applied Sciences
56 Hudson St., Northborough, MA 01532 Ph: (508) 393-0155 Fax: (508) 393-5476
www.matec.com
e-mail: [email protected]
4.
Unscrew the three screws holding the cartridge in place. Gently remove the cartridge from
the instrument.
5.
Using your thumb, straighten SS tube 7 somewhat.
6.
Disconnect the fitting from the cartridge at location 6 (bottom cartridge inlet) shown in figure
6.20.
7.
Pull the SS tube 7 away from the cartridge to expose the small, brown, glass capillary tube.
8.
Score the capillary with a ceramic disc, then break off a 1/8” piece of capillary.
9.
Replace the tubing in reverse order that it was disconnected.
Replace the cartridge using the screws provided. Re-connect the four fittings. Do not over-tighten
the fittings. Tighten ¼ turn past finger-tight.
10.
Run known samples or standards to see if the cartridge is working properly.
6.6.2 Replacing the Fractionation Cartridge
If the snipping procedure described in the above section does not solve your problem, the
fractionation cartridge on the CHDF 2000 will need to be replaced. Once a new cartridge is
purchased from Matec, it is a relatively simple procedure to install it. The cartridge is located
behind the front door of the instrument, in the center, top position. Changing the cartridge is
performed in the following steps.
1.
Stop the pump on the CHDF 2000.
2.
Open the front door of the instrument. The cartridge is located in the center top position, and
it should look like this (Figure 6.20):
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