Xylem HandyLab 680 - Manual (Page 39)

HandyLab 680 Operation
39 ba77041e01 03/2014
4.7 pH value
4.7.1 General information
You can measure the following parameters:
 pH value [ ]
 Sensor voltage [mV]
Note
The sensor connection and the USB-B (device) interface are galvani-
cally isolated. This facilitates interference-free measurements also in
the following cases:
 Measurement in grounded test samples
 Measurement in one test sample with several sensors connected to
one HandyLab 680
Temperature
measurement
For reproducible pH measurements, it is essential to measure the tem-
perature of the test sample. IDS sensors measure the temperature with
a temperature sensor integrated in the IDS sensor.
Note
The settings for the temperature can be adjusted in the menu for calib-
ration and measurement settings (siehe section 4.7.3).
Preparatory activities Perform the following preparatory activities when you want to measure:
When operating a sensor without integrated temperature sensor you
have the following options to determine the temperature of the measu-
ring solution:
 Temperature measurement via the integrated temperature sensor of
an IDS sensor.
When the measured temperature value is taken from another IDS
sensor the [TP
↑
] status indicator is displayed in the measuring win-
dow. In the measuring window of the IDS sensor providing the mea-
sured temperature value the [TP
↓
] status indicator is displayed.
 Manual determination and input of the measured temperature value.
1 Connect the IDS pH sensor to the meter.
The pH measuring window is displayed.
2 If necessary, select the measured parameter with <M>.
3 If necessary, calibrate or check the IDS pH sensor.