Pges
Operation
2 - 3
ba43121e03
01/2011
2.1
Measuring
The Pges analyzer module operates discontinuously. A measuring
procedure is a sequence of several steps. The respective start time of
a measuring procedure depends on the settings in the menus,
Measuring interval
and
Interval program
.
Note
The type of measuring and the intervals are specified in the Measuring
interval menu. See section 2.9 P
ARAMETER
, V
IEW
/
CHANGE
INTERVAL
PROGRAM
on page 2-25.
Program sequence
(measurement without
blank sample)
The following table describes the measuring procedure in a simplified
form. Depending on the instrument state during the start, additional
steps such as rinsing and emptying can take place before the first step,
(display,
rinse sample)
.
Step
Instrument status/action
Display indication during
the first cycle*
1
– The digestion reactor is
filled with sample (without
reagent).
Rinse sample
2
– The sample is pumped on
from the digestion reactor
to the photometer (without
reagent).
– The heating of the
digestion reactor is turned
on (preheating).
Rinse sample
3
– The digestion reactor is
filled with sample, reagent
A and reagent B.
Rinse sample
4
– The valves on the
digestion reactor are
closed (beginning of the
digestion period).
– The digestion reactor is
heated to digestion
temperature (120 °C or
150 °C, see section 2.10)
and the instrument waits
for the preselected
digestion duration to
expire.
Digestion, Treactor = ... °C
