Table of Contents
Advertisement
ANALOG OUTPUT
Warning: Intrinsically safe models require special actions with respect to the following
section. Refer to Appendix B for descriptions of these actions.
The SapphIRe analyzer is equipped with a 0 to 1 V dc analog output jack (see See
Analyzer Output Connections, Figure 3-8). This output is linear with concentration and
is assigned to a gas in a single gas application. In a multi-gas application, the analog
output must be assigned to the gas. The output is linear with the High Range Limit
(HRL) (see See Gas High Range Limit). For example, if the HRL is set to 50 ppm and
the analyzer is displaying 25 ppm, the analog output is 0.5 V dc. If the HRL is set to 100
ppm and the analyzer is displaying 25 ppm, the analog output is 0.25 V dc.
INSTRUMENT ORIENTATION
The SapphIRe analyzer can be used in primarily two positions: (1) vertical with the
handle facing up and (2) horizontal with the display facing up. Either position is
acceptable for analysis. However, because of gravitational forces on the motor
mechanism, which drives the wavelength system, the most stable position is horizontal.
Furthermore, there can be differences in the displayed data when the analyzer is zeroed in
the horizontal position and used for analysis in the vertical position or vice versa.
When performing any (spot checking or long term) analysis, Thermo Fisher Scientific
recommends that the unit be placed in the horizontal position. Certain applications can
cause problems when in the vertical position. For example, if measuring very high
concentration samples of dense gases, it is possible that sample may settle to one end of
the cell. High concentration anesthetic gas analysis can cause this phenomenon. To
solve the problem, place the analyzer in the horizontal position.
4-17
Chapter 4 Operation
Advertisement
Table of Contents
