3600 Analyzer for O
2
Measurement—Operator’s Manual 7
3600O2.OM.E9903
You should be able now to view the gold cathode, or “working electrode”, in the
center; a guard ring electrode surrounds the cathode, separated by a fine groove.
The anode, or “counter electrode”, is underneath the membrane support. You will
get a better look at all these components during your first sensor service. Before
making a measurement, check the sensor head to see that:
• The membrane holding ring is firmly in place,
• The membrane surface is smooth and wrinkle-free,
• The electrolyte beneath the membrane is free of bubbles,
• The electrodes appear clear, clean, and bright.
Check sensor placement—The oxygen sensor can be placed:
• In a flow chamber (for on-line sampling, that is, samples drawn off line by
6-mm or ¼-inch tubing);
• In a sensor socket or ProAcc insertion/extraction valve for measurements
made directly in a sampling pipe; or
• Directly into “loose” liquid or gas-phase samples.
Check to see that the sensor installation recommendations in the Installation
Guidelines, section 2.2, are followed before proceeding with measurements.
To Next Page
Loading...