Xylem pH/ION 3400i ION SELECTIVE ELECTRODE ANALYZER - Manual (Page 29)

pH/ 3400i Operation
29
4.3.3 ConCal
Two-point calibration For this procedure, use two buffer solutions:
z pH 7.0 ± 0.5
z any other buffer solution
Note
Skip the steps 2 and 8 if you use a pH electrode with a temperature
sensor.
Note
At this point, the ConCal calibration can be broken off with . This
corresponds to a single-point calibration. When doing so, the instru-
ment uses the Nernst slope (-59,16 mV/pH at 25 °C) and the fixed
asymmetry of the electrode.
1 Press the key repeatedly until the ASY display and the
ConCal function display appears. The sensor symbol displays
the evaluation of the last calibration (or no sensor symbol in the
delivery state or after the measurement parameter has been
reset).
2 If required, enter the temperature of the first buffer solution with
<
▲> <▼> while keeping the key depressed.
3 Immerse the pH electrode in the first buffer solution (pH 7.0 ±
0.5 in two-point calibration).
4 Press the key.
The measured pH value appears on the display.
5 Set the measured value to the nominal pH value of the buffer
solution (at the current temperature) with <
▲> <▼>.
6 When the measured value is stable, press the
key. The value of the asymmetry appears.
7 Press the key. SLO appears.
AutoCal DIN
AutoCal TEC
6
mV/pH
mol/L
8
Auto Store
RCL
LoBat
CalError
ARng AR
Time Baud
Day.Month No.
Ident Year
1
U
%
°F
S
TempError
mg/L
% ppm
ISE
8 4 2
Y AS
°C TP
pH
ConCal