Hanna Instruments HI 903 - Manual (Page 36)

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SETUP
Karl Fischer Electrode
The Karl Fischer electrode consists of two parallel, platinum pins sealed into a 10mm diameter
glass body. Two steel pins connect the platinum elements to a standard BNC connector,
which allows for easy attachment to the HI 903.
Attach to the beaker top as follows:
• Carefully insert the electrode through a 10-mm fitting (E) and 10-mm o-ring (F).
• Insert electrode through proper port in beaker top (see Figure 7).
• While orienting electrode with pins aligned to the center of the beaker, fasten the
10-mm fitting (E) to the beaker top. The electrode above stirbar should be as far
down into the beaker as possible.
• Attach the electrode connector to the BNC connector on the back of the instrument.
Solvent Handling System
The HI903 ships with white plugs (G) in the solvent ports. To attach solvent bottle tubing or
waste bottle tubing, follow the steps below:
• Loosen the 5-mm fitting (H) on the solvent and/or waste port.
• Remove the desired plug/plugs (G).
• Insert the blue PTFE tubing from the solvent and/or waste bottle assemblies through
the 5-mm fittings (H) and 5-mm o-rings (I) until about 1 cm of tubing is visible
inside the beaker.
• Tighten the 5-mm fittings (H) until snug. This will cause the red silicone o-rings (I)
to seal around the tubes.
Sample Port Plug
The HI903 ships with the sample port plug assembled and installed. To reassemble, follow
the steps below:
• Insert a red rubber septum (J) into the septum holder (K).
• Fasten with a 10-mm fitting (E).
• Place the sample port plug o-ring (L) in the slit of the septum holder (K).
• Insert the assembled sample port plug into the dedicated port of the beaker top.
Desiccant Cartridge
• Insert the stem of a desiccant cartridge (M) with a plain cap (N) through a 10-mm
fitting (E) and 10-mm o-ring (F).
• Insert in the proper port of the beaker top.
• Fasten to the top with the 10-mm fitting.