wtw pH/ION 7320, Руководство по эксплуатации, Страница: 46 / 104

Ion concentration pH/ION 7320
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 as soon as the measured value is outside the stability range
 when the automatic Stability control is switched off.
You can activate or switch off the automatic Stability control function (see
section 9.3.1 S
YSTEM
, page 75).
Criteria The AutoRead criteria affect the reproducibility of the measured values. The
following criteria can be adjusted:
 high : highest reproducibility
 medium : medium reproducibility
 low : lowest reproducibility
1. Freeze the measured value with <AR> .
The [HOLD] status indicator is displayed.
The HOLD function is active.
You can terminate the Stability control function and the HOLD func-
tion with <AR> or <M> at any time.
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. Using <ENTER> , start a further measurement with stability control.
or
Release the frozen measured value again with
<AR> or <M> .
The [AR] status display disappears. The display switches back to the
previous indication.
Increasing reproducibility also causes the response time to
increase until a measured value is evaluated as stable.