pH value
Multi 3630 IDS
30
ba77170e03
10/2017
Criteria for a stable
measured value
The
Stability control
function checks whether the measured values are stable
within the monitored time interval.
The minimum duration until a measured value is assessed as stable is the mon-
itored time interval. The actual duration is mostly longer.
5.1.2 Measuring the temperature
For reproducible pH measurements, it is essential to measure the temperature
of the test sample.
Most IDS sensors measure the temperature with a temperature sensor inte-
grated in the IDS sensor.
2
Using
<ENTER>
, activate the
Stability control
function manually.
The [AR] status indicator appears while the measured value is
assessed as not stable. A progress bar is displayed and the display of
the measured parameter flashes.
The [HOLD][AR] status indicator appears as soon as a stable mea-
sured value is recognized. The progress bar disappears and the dis-
play of the measured parameter stops flashing.
The current measurement data is output to the interface. Measurement
data meeting the stability control criterion is marked by AR.
You can prematurely terminate the
Stability control
function manu-
ally with
<ENTER>
at any time. If the
Stability control
function is
prematurely terminated, the current measurement data are output
to the interface without the AutoRead info.
3
Release the frozen measured value again with
<AR>
or
<M>
.
The [AR] status display disappears. The display switches back to the
previous indication.
Measured
parameter
Time interval
Stability in the time inter-
val
pH value
15 seconds
∆
: better than 0.01 pH
Temperature
15 seconds
∆
: better than 0.5 °C
When operating a sensor without integrated temperature sensor, e.g. via an
IDS-pH adapter, there are the following ways to measure the temperature of
the test sample:
