Xylem HandyLab 600 - Manual (Page 22)

pH value HandyLab 600
22 ba77064e01 03/2014
5 pH value
5.1 Measuring
5.1.1 Measuring the pH value
NOTE
When connecting a grounded PC/printer, measurements cannot be
performed in grounded media as the values would be incorrect. The USB
interface is not galvanically isolated.
Stability control
(AutoRead)
& HOLD function
The stability control function (AutoRead) continually checks the stability of the
measurement signal. The stability has a considerable impact on the reproduc-
ibility of measured values.
The measured parameter flashes on the display

as soon as the measured value is outside the stability range
 when the automatic Stability control is switched off.
You can start the Stability control manually at any time, irrespective of the set-
ting for automatic Stability control (see section 7.3.3 A
UTOMATIC S TABILITY CON -
TROL
, page 46) in the System menu.
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. Adjust the temperature of the solutions and measure the current tem-
perature if the measurement is made without a temperature sensor.
4. If necessary, calibrate or check the IDS pH sensor.
5. Immerse the IDS pH sensor in the test sample.
25.0
7.007
pH
°C
0 14
01.02.2014
08:00
Info USB output
1. Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
The HOLD function is active.