Xylem HandyLab 600 - Manual (Page 37)

HandyLab 600 ORP
ba77064e01 03/2014 37
6 ORP
6.1 Measuring
6.1.1 Measuring the ORP
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.
IDS ORP sensors are not calibrated. However, you can check IDS
ORP sensors using a test solution.
1. Connect the ORP sensor to the meter.
The ORP measuring window is displayed.
2. If necessary, check the ORP sensor using a check solution.
3. Immerse the ORP sensor in the test sample.
U
157.0
mV
24.8 °C
01.02.2014
08:00
Info USB output
1. Freeze the measured value with .
The [HOLD] status indicator is displayed.
The HOLD function is active.