Xylem Multi 3620 IDS, Руководство по эксплуатации

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Multi 3620 IDS Turbidity measurement (VisoTurb
®
900-P)
ba77169d06 10/2021
65
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.
9.2 Calibration
9.2.1 Why calibrate?
The calibration line of the sensor is determined and stored through calibrating.
9.2.2 When to calibrate?
 When the calibration interval has expired
 At regular intervals
2. Using
<MENU/ENTER>
, activate the
Stability control
function manu-
ally.
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
manually with
<MENU/ENTER>
at any time. If the
Stabil-
ity control
function is prematurely terminated, the current
measurement data are output to the interface without the
AutoRead info.
3. Using
<MENU/ENTER>
, start a further measurement with
Stability
control
.
or
Release the frozen measured value again with
<AR>
.
The display switches to the measured value display.
The [AR][HOLD] status display disappears.
Measured param-
eter Time interval Stability in the time inter-
val
Turbidity
(FNU/NTU)
15 seconds Δ : better than
1.0% of measured value