Release 06/2019 13
Spectroquant
®
NOVA 60A - Operating Manual
Zero adjustment
Zero adjustment is necessary
• after changing the lamp
• after the error message, PhotoCheck (AQA1)
occurs
• on initial commissioning
• if the photometer was mechanically stressed,
e. g. percussion, transport
• if the ambient temperature changed by more
than 5 °C since the last zero adjustment
• at least every six months.
When performing the zero adjustment with a
round cell observe the following points:
• Only use a clean, scratch-free round cell with
distilled water. A prepared zero cell is provid-
ed with your photometer.
In addition, a prepared zero cell is contained
in the scope of delivery of the PhotoCheck
(article 114693).
• If the round cell is visibly contaminated, or at
least every 24 months, clean and refill it
(minimum filling level 20 mm). Then check
the cell for scratches.
When performing the zero adjustment with a
rectangular cell observe the following points:
• With rectangular cells, the adjustment must
be made using the same cell type (manufac-
turer) as for the measurement. This is impor-
tant because glass of different manufacturers
has different absorption behavior. When
changing the cell type always repeat the zero
adjustment with the new type.
• Clean the rectangular cell before performing
the zero adjustment and fill it with distilled
water (minimum filling level 20 mm).
• For measurement, always insert rectangular
cells in the cell shaft with the same orienta-
tion as during the zero adjustment (e. g. cell
labeling always on the left side).
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