Gas Connections - Teledyne 3000TA Operating Instructions Manual

Trace Oxygen Analyzer

3.3.1 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
;ow 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 without 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). Use the restrictor without the blue dot sticker in the same manner
for low pressure applications (less than 5 psig).
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
Figure 3-3: Rear Panel of the Model 3000TA
damage to the micro-fuel cell.
Teledyne Analytical Instruments
Installation 3
3-3