Xylem VARIO WATERPROOF PH METER - Manual (Page 20)

Operation VARIO pH
20 ba75373e04 07/2006
4.3.2 Measuring the pH value
4.3.3 Measuring the temperature
For reproducible pH measurements, it is essential to measure the
temperature of the measuring solution.
You have the following possibilities of measuring the temperature:
z Automatic measurement of the temperature by a temperature sensor
integrated in the sensor module or electrode. All short pH electrodes
contain a temperature sensor.
z
An NTC30 external temperature probe (accessory) measures the
temperature automatically (see section 3.4.2). This method is possible
with electrodes without an integrated temperature sensor. When
measuring with a short pH electrode no external temperature probe may
be connected.
z Measuring and entering the temperature manually.
1 Make sure the measuring system has a valid calibration (see section
4.4).
2 Immerse the electrode in the test sample.
The display shows the main measured value (pH or mV) and
temperature value. When operating an electrode without temperature
sensor on the adapter, the manually entered temperature value is
displayed (see section 4.3.3).
The unit of the measured value display flashes (AutoRead) as long
as the measured value is not stable.
3 If necessary, switch the display between pH and mV with < "_ >
[<Measured value>].
4 Wait for a stable measured value.
As soon as the measured value is stable, the unit of the measured
parameter (pH or mV) no longer flashes.
mV
pH
8
8
LoBat Day.Month min:s Ident Lap h:min
CLR
RESET
LAP
ESC
CAL
MEM
C
7 0 0
0 2 5
d
0 0
d
pH
8
8
LoBat Day.Month min:s Ident Lap h:min
CLR
RESET
LAP
ESC
CAL
MEM
C
0
0 2 5
mV
< "_ >