Gas Connection

  These instructions are for connecting inert gases only. Follow the safety procedures used by your laboratory for connecting hazardous gases.
  Review Gas Requirements  prior to installing gas.

  1. Attach an appropriate regulator to the gas cylinder or gas line, then tighten with a wrench. Leave the gas bottle shutoff valve closed until instructed otherwise.
  2. Attach the gas inlet line to the regulator, reducer fitting, or regulator expansion.
  It is important to use the inlet tubing supplied with the analyzer. Gas lines made of materials other than copper or stainless steel can cause operational problems as well as inaccurate data.
If Regulator has... Then...
1/4 in. outlet Attach the reducer fitting to the outlet of the regulator shutoff / isolation valve.
Tighten the nut finger tight, then 1-1/4 turns with a wrench.
Continue with the steps given for the 1/8 in. outlet.
1/8 in. outlet Insert the gas tubing into the fitting.
Enure the tubing is seated fully inside the fitting.
Tighten the nut finger tight.
While holding the fitting body steady, tighten the nut with a wrench 3/4 turn.
  Do not overtighten the fittings. Doing so can collapse the brass fitting and cause a leak.
  1. Purge the regulator and inlet tubing to prevent contamination of the analysis gas.
  1. Turn the regular shutoff valve clockwise to close.
  2. Turn the pressure regulator control knob counter-clockwise to open.
  3. Slowly turn the gas cylinder shutoff valve counter-clockwise to open, then quickly close it.
  4. Observe the high pressure gauge.

If the pressure decreases, tighten the nut connecting the regulator to the gas cylinder. If the pressure is stable, proceed to the next step.

  Ensure the gas supply equipment is adequately vented before performing the next step.
  1. Turn the pressure regulator control knob clockwise until the low pressure gauge indicates 19.500 psig (134.445 kPag).
  2. Turn the regulator shutoff valve counter-clockwise to open.
  3. Turn the gas cylinder shutoff valve counter-clockwise to open. Flow gas for 10 to 30 seconds, then close the valve.
  4. Turn the gas regulator shutoff valve clockwise to close
  5. Attach the other end of the copper tubing to the gas inlet on the rear panel of the pycnometer. Remove the inlet plug that shipped with the pycnometer.

  1. Turn the nut on the tubing clockwise until it is finger tight. Then use a 7/16 in.(1 mm) wrench to tighten the nut an additional 1/4 turn.
  1. Open the gas cylinder and regulator shutoff valves.
  2. Turn the regulator control knob until the low pressure gauge indicates 21.5 psig (148 kPag). For a high pressure sample chamber configuration, set regulator pressure 20 psi above cycle and fill pressure.
 
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