<HTML>

<HEAD>

  <style type="text/css">
    p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 16.0px 'Lucida Grande'; color: #0225c7}
    p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px 'Lucida Grande'; min-height: 17.0px}
    p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px 'Lucida Grande'}
    span.s1 {font: 14.0px 'Lucida Grande'; color: #000000}
    span.s2 {font: 10.0px 'Lucida Grande'}
    span.s3 {text-decoration: underline}
  </style>
</head>
<body>

  <table width = 700>
  <TR><TD>
  

<p class="p1"><b>Gas exchange notes</b><span class="s1"><span class="Apple-converted-space"> </span></span></p>
<p class="p2"><br></p>
<p class="p3">•<span class="Apple-converted-space">  </span>For VO<span class="s2">2</span> Modes 3 and 5 and Mask Modes 1 and 3, and for CO<span class="s2">2</span> Mode 2 and Mask Mode 1, the positions of the flow meter and gas analyzer can be 'flipped' with no effect.<span class="Apple-converted-space">  </span>In other words, the either the gas analyzer or the flow meter can be last in the 'chain'. <span class="Apple-converted-space"> </span></p>
<p class="p2"><br></p>
<p class="p3">•<span class="Apple-converted-space">  </span>The plumbing arrangement shown for O<span class="s2">2</span> Mask Modes 4 and 5, CO<span class="s2">2</span> Mode 4 (measuring flow rate on undried gas) is <span class="s3">not</span> recommended except at low temperatures or if you are sure relative humidity in the gas stream is low.</p>
<p class="p2"><br></p>
<p class="p3">•<span class="Apple-converted-space">  </span>For similar reasons, the plumbing arrangement shown for CO<span class="s2">2</span> Mask Mode 3 (measuring CO<span class="s2">2</span> concentration in undried gas) is <span class="s3">not</span> recommended.</p>
</body>
</html>