Teledyne 3220 - Multi-channel oxygen monitor system - Manual (Page 32)

3 Installation Model 3220
Teledyne Analytical Instruments 18
There should not be any obstruction in the area immediately around
the probe assembly as the Micro-fuel Cell depends strictly on diffusion
to sample the atmosphere. Flow-thru adapters may be used when
positive pressure sample gas is being analyzed. While the cell is flow
insensitive, TAI recommends using flow rates within the range of 0.1 to
10 liters per minute (LPM). Flow rates must be controlled externally.
The probe assemblies should be installed in such a manner as to allow
personnel access to the cell assembly for cell replacement.
Figure 3-1: Oxygen Probe Assembly
3.5 Micro-Fuel Cell
A Micro-fuel Cell is furnished for each remote probe assembly. The
cell, as supplied, is packaged in a controlled atmosphere. The following
installation procedure should be followed for each probe assembly.
1. Remove the cell from its package taking care not to puncture or
tear the thin membrane covering the perforated gold sensing
surface.
2. Remove the shorting clip.
3. Unscrew the probe cap and remove it from the probe body.
4. Place the cell with the contact end facing up in the exposed probe
cavity and replace the cap.