Teledyne 3000ZA - Trace oxygen analyzer - Manual (Page 29)

Trace Oxygen Analyzer Installation
Teledyne Analytical Instruments 17
pressure applications (5-50 psig) use the restrictor that has a blue sticker
on the body.
•
Pressurized service: Connect the restrictor with the blue dot
to the Sample In port. The small circular orifice should face
AWAY from the back of the unit (against the direction of gas
flow).
Note: Remove the blue sticker from the restrictor before using.
•
Low pressure applications: Connect the restrictor without
the blue sticker in the same manner (less than 5 psig).
•
Vacuum Service: For applications involving pressure less
than 5-10 in Hg) connect the restrictor without the blue
sticker to the Exhaust Out port. The small circular orifice
should face TOWARD the back of the unit (against the
direction of gas flow).
CAUTION: OPERATING THE UNIT WITHOUT RESTRICTORS CAN
CAUSE DAMAGE TO THE SENSOR.
The unit is manufactured with 1/4” tube fittings and includes 6 mm
adapters for metric system installations. For a safe connection:
1. Insert the tube into the 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. using
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 inlet gas pressure should be reasonably regulated. Pressures
between 2 and 50 psig are acceptable as long as the pressure, once
established, will keep the front panel flowmeter reading in an acceptable
range (0.5 to 2.0 SLPM). For non-pressurized sample or very low
pressure, (less than 2 psig) vacuum service plumbing is recommended.
Exact figures will depend on your process.