AmmoLyt
®
700 IQ
Calibration and measuring
4 - 11
ba75353e05
03/2006
4.1.7
Calibration procedure,
2 point stand. (3)
The
2 point stand. (3)
two-point calibration is carried out with two stan-
dard solutions of different concentrations. The procedure includes two
conditioning processes. Each conditioning process takes 15 min and is
important so the temperatures of standard solution and electrode can
adjust to each other and a stable concentration can be reached at the
electrode membrane. During the conditioning process the remaining
time is displayed on the screen. The process cannot be shortened. By
pressing
e
or
m
you cancel the entire calibration and the old calibra-
tion data is still used. The time required for the entire calibration is
approx. 40 min.
Note
Determine the potassium content of the sample (see section 4.2.2).
Activate the
Potassium compens.
function and adjust the potassium
content (see section 3.4).
The potassium content of the sample does not effect calibration but the
measurement following.
If you carry out a
1 point ref. (2)
calibration directly after the
2 point
stand. (3)
calibration it is sufficient to determine and adjust the potas-
sium content during the
1 point ref. (2)
calibration (matrix alignment)
(see section 4.1.6).
Citation form of ref. conc.
NH4(0.1..129.0mg/l)
NH4(1..1290mg/l)
NH4N(0.1..100.0mg/l)
NH4N(1..1000mg/l)
If necessary select the citation
form with
d
.
Confirm with
g
.
Input reference concentration
Value determined
Confirm with
g
.
Value of ref. concentration
x mg/l NH4-N
If necessary set the reference
concentration determined with
d
.
Confirm with
g
.
Calibration successful
Conc. (NH4-N)
x mg/l
Slope
y mV*
Drift voltage
z mV
End of 1 POINT REF. (2) cal.
The values for
Conc. (NH4-N)
,
Slope
and
Drift voltage
are dis-
played. The slope is taken over
from the last calibration that
determined the slope.
The calibration is complete. Con-
firm with
g
.
The display returns to the measu-
red value display.
Содержание AmmoLyt 700 IQ
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