Xylem Lab 870 - Manual (Page 34)

Operation Lab 870
34 ba75555e04 11/2009
Note
Here you can cancel the calibration procedure with . This
corresponds to a two-point calibration. The value of the zero point
(Asy) is displayed for 10 seconds, then the value of the slope (Slo) is
displayed for 10 seconds. After this the meter switches to the
measuring mode.
The ID sensor symbol flashes while the calibration data is being stored
in the sensor. The sensor must not be disconnected while the ID sensor
symbol is flashing, as otherwise the calibration data will not be
completely transmitted. The sensor will then have no valid calibration.
Continue with three-
point calibration
Note
The sensor must not be disconnected while the ID sensor symbol is
flashing, as otherwise the calibration data will not be completely
transmitted. The sensor will then have no valid calibration.
9 Thoroughly rinse the electrode with distilled water.
10 If necessary, set the temperature of the third buffer solution
with <
▲><▼>.
11 Immerse the pH electrode in the third buffer solution.
12 Press the key.
The SC display indicator flashes.
Depending on the setting, the display shows the nominal pH
value for the recognized buffer or the electrode voltage (mV).
As soon as a stable value is recognized, the value of the zero
point (ASY) is displayed for 10 seconds, then the value of the
slope (SLO) is displayed for 10 seconds.
After this the meter switches to the measuring mode.
The ID sensor symbol flashes while the calibration data is
being stored in the sensor.
Y s a
pH
4 0
%
mV
AutoCal