Teledyne 3000TB-XL - Trace oxygen analyzer User Manual

Page 38

3 Installation

Model 3000TB

XL

3-12

Teledyne Analytical Instruments

3.4

Installing the Micro-Fuel Cell

The Micro-Fuel Cell is not installed in the cell block when the

instrument is shipped. It must be installed before the analyzer is placed in
service.

Once it is expended, or if the cell is exposed to air for too long, the

Micro-Fuel Cell will need to be replaced. The cell could also require replace-
ment if the instrument has been idle for too long.

When the micro-Fuel Cell needs to be installed or replaced, follow the

procedures in chapter 5, Maintenance, for removing and installing cells.

3.5

Gas Connections

Before using this instrument, it should be determined if the unit will be

used for pressurized service or vacuum service and low pressure applica-
tions. Inspect the restrictor kit that came with the unit. The kit consist of two
restrictors and a union for 1/4” diameter tubing. Notice that the two 1 3/4”
long, 1/4” diameter tubing are restrictors. It has an open end and a closed
end with a small circular orifice. The restrictor without the blue sticker is for
low pressure and vacuum service. For high pressure (5 to 50 psig) applica-
tions, use the restrictor that has a blue sticker on the body.

For pressurized service, use the restrictor with the blue dot and union

from the restrictor kit and attach it to the Sample In port. The small circular
orifice should face away from the back of the unit (against the direction of
gas flow).

For positive pressures less than 5 psig, use the restrictor without

the blue dot sticker

in the samplein line in the same manner.

For vacuum service (5-10 in Hg), use the restrictor without the blue dot

sticker and union but attach it to the Exhaust Out port. The small circular
orifice should face toward the back of the unit (against the direction of gas
flow).

Remove the blue sticker from the restrictor before using.

WARNING: Operating the unit without restrictors can cause

damage to the micro-fuel cell.

Figure 3-10 is an illustration of the Gas Connector Panel. The connec-

tors are

inch tube fittings. Optional gas connections are shown in a shaded

block.

For a safe connection:

1. Insert the tube into the tube fitting, and finger-tighten the nut until

the tubing cannot be rotated freely, by hand, in the fitting. (This
may require an additional

turn beyond finger-tight.)