Teledyne 6400EH - Sulfur Dioxide Analyzer - Manual (Page 29)

UV Fluorescence SO2 Analyzer FAQ
Teledyne Analytical Instruments 17
Frequently Asked Questions
Q: How long does the sample pump last?
A: The sample pump should last about one year and the pump
diaphragms should to be replaced annually or when
necessary.
To determine if the diaphragm on a 6400EH needs replacing check
the
VAC test function (instead of the PRES function as described in the
6400E Manual). If the
VAC value is > 10 in-Hg-A, the diaphragm should
be replaced.