Servomex NanoTrace DF-760E, Instruction Manual

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Sample Gas Preparation and Delivery DF-760E 123
NOTE
The temperature can be displayed at any time by accessing the
Diagnostics Menu for either the Moisture or Oxygen sensors. This
temperature value is updated at intervals of 15 to 45 seconds.
8.4.7 Protecting the Analyzer from Process Upsets
The analyzer should be protected from extended exposure to high concentrations of oxygen
or hostile gases. Automatically controlled solenoid valves should be installed to switch the
analyzer over to an N
2
purge when the process reaches some identifiable condition.
Gas line maintenance operations must also be examined for their effect on the analyzer.
For example, in many pipeline process or normal gas applications the plumbing system is
cleaned with either a liquid solvent or detergent solution. Since either causes damage to
the sensor, switch the analyzer over to a N
2
bypass purge, or shut off sample flow and
power to the analyzer prior to initiating the potentially hazardous process.