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Setting Up
Connecting the Gas Lines
The OX-TRAN Model 2/28 has two gas inlets, one for connecting the Test Gas (oxygen) supply and the
other for connecting the Carrier Gas (nitrogen/hydrogen) supply. These compression fittings are intended
for use with 1/8" copper tubing. Refer to Figure 2-3 and Figure 2-4 for the location of these fittings and an
example of plumbing system diagram.
The optional Starter Kit (054-111) contains 50 feet (14 meters) of tubing in addition to extra compression
nuts, ferrules and grease.
Connecting the Carrier Gas Supply
Follow these steps to connect the Carrier Gas supply lines:
1.
Remove the brass plug from the Carrier Gas fitting on the instrument back panel. Save the
plug it will be needed later.
2.
Cut a piece of tubing approximately 3 inches in length (33 cm).
3.
Cut a piece of tubing approximately 10 inches in length (33 cm).
4.
Apply a thin coating of Apiezon grease to four compression ferrules.
5.
Connect the Carrier Gas fitting on the instrument back panel to the Brass Filter (051-791)
using the 3-inch length of tubing and two nuts and ferrules. The arrow on the Filter must
point towards the tube connected to the instrument back panel.
6.
Connect the input on the Filter to the output fitting on a regulator tee using the 10-inch
length of tubing and two nuts and ferrules.
7.
Cut a piece of tubing to connect the regulator tee to the Carrier Gas cylinder regulator.
8.
Apply a thin coating of Apiezon grease to two compression ferrules.
9.
Connect the Carrier Gas regulator tee to the Carrier Gas (Nitrogen) supply regulator using
two nuts and ferrules.
10.
If there are additional instruments to be connected, repeat steps 2 - 6 and 11 - 13 for each
instrument.
11.
Cut a piece of tubing to connect the regulator tee on the previous instrument to the regulator
tee on the next instrument.
12.
Apply a thin coating of Apiezon grease to two compression ferrules.
13.
Connect the previous Carrier Gas regulator tee to the next Carrier Gas regulator tee using
two nuts and ferrules.
14.
Using the plug removed in step one, cap the open port on the last regulator tee assembly.
Caution:
Before proceeding verify that the Carrier Gas and Test Gas inlets on each instrument are
connected to the appropriate gas supply. If the Carrier Gas inlet is connected to the oxygen
supply, the oxygen sensor will be damaged and replacement will be required.
2-6
OX-TRAN Model 2/28 Operator's Manual
Revision J
MOCON, Inc.
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