VWR MD 8000 L, Руководство по эксплуатации

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pH value MD 8000 L
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ba77218e01 11/2018
6 pH value
6.1 Measuring
6.1.1 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 11.6.3 A
UTOMATIC
S
TABILITY
CONTROL
, page 70) in the System menu.
1. Connect the IDP pH sensor to the meter.
The pH measuring window is displayed.
2. If necessary, select the measured parameter with
<MODE>
.
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 IDP pH sensor.
5. Immerse the IDP pH sensor in the test sample.
25.0
7.007
pH
°C
01.11.2018
08:00
i
USB output
1. Freeze the measured value with
<HOLD>
.
The [HOLD] status indicator is displayed.
The HOLD function is active.