Trace Oxygen Analyzer
Installation
Teledyne
Analytical
Instruments
31
For positive pressures less than 5 psig use the low-pressure
restrictor
without
the blue dot in the
Sample-in
line.
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.
The unit is manufactured with 1/4
inch tube fittings, and 6 mm
adapters are supplied for metric system installations. 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 1/8 turn beyond
finger-tight.)
2.
Hold the fitting body steady with a backup wrench, and with
another wrench rotate the nut another 1-1/4 turns.
SAMPLE IN:
In the standard model, gas connections are made at the
SAMPLE IN
and
EXHAUST OUT
connections. Calibration gases must be tee'd into
the Sample inlet with appropriate valves.
The gas pressure in should be reasonably regulated. Pressures
between 3 and 40 psig are acceptable as long as the pressure, once
established, will keep the front panel flowmeter reading in an acceptable
range (0.1 to 2.4 SLPM). For non-pressurized sample or very low
pressure, (2 psig or less) vacuum service plumbing is recommended.
Exact figures will depend on your process.
If greater flow is required for improved response time, install a
bypass in the sampling system upstream of the analyzer input.
Note: If the unit is for vacuum service, the above numbers apply
instead to the vacuum at the EXHAUST OUT connector,
described below, with minus signs before the pressure
readings.