Appendix | BDS 3960 | |
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A-5 Application notes
Pressure and flow recommendations:
3960 series analyzers require reasonably regulated sample pressures. While the 3960 analyzers are not sensitive to variations of incoming pressure (provided they are properly vented to atmospheric pressure), the pressure must be maintained so as to provide a useable flow rate through the analyzer. Any line attached to sample vent should be 1/4" or larger in diameter.
Flow rate recommendations:
A usable flow rate for a 3960 series analyzer is one which can be measured on the flowmeter. This is basically 0.5 - 1.0 SLPM. The optimum flow rate is 1 SLPM (mid scale). Note: response time is dependent on flow rate, a low flow rate will result in slow response to O2 changes in the sample stream. The span flow rate should be the approximately same as the sample flow rate.
Cell pressure concerns:
The sensors used in 3960 series analyzers are optimized to function at atmospheric pressure.
Bypass:
To improve the system response, a bypass can be added to increase the sample flow rate to the analyzer by a factor of ten. A by- pass provides a sample flow path around the analyzer of 2 - 18 SCFH. typically.
Conversons: |
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1 PSI | = | 2.04 INCHES OF MERCURY (in. Hg.) |
1 SCFH | = | 0.476 SLPM |
Note: The MSDS on this material is available upon request through the Teledyne Environmental, Health and Safety Coordinator. Contact at (626)
Teledyne Analytical Instruments | 70 |