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REPLACEMENT AND CLEANING OF PHOTOMETRIC COMPONENTS
ETC00303(1) BINOS E e (2.0) 02/2007
Rosemount Analytical
17.5 Physical Zeroing
Adjustment of the physical zero - level will only be required if a light source, a filter cell, or an
analysis cell have been replaced or repositionned.
Be sure to observe the safety measures !
Needed for the adjustment is a 3 mm hexagon wrench SW 3.
Switch on the analyzer (cf. Section 6.).
Admit zero gas to the instrument.
Slightly loosen the light source mounting screws (shown in Fig. 17-2 as Item 1) for
corresponding channel.
Set the raw signal [(press "Status" (F2) "RawMeas." (F2)] precisely to ± 100.000 counts
by turning the corresponding light source.
Tighten the light source mounting screws (shown in Fig. 17-2 as Item 1) for
corresponding channel.
If the turning of the light source is not sufficient, the zero point can be adjusted by sliding the
zero point diaphragm at the lower side of the detectors adapter (Fig. 17-4).
When the physical zeroing has been correctly set, perform an electrical zeroing (see software
manual).
PHYSICAL ZEROING