Grundfos Conex DIA-2, Installation And Operating Instructions Manual

Page: 46 / 612

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11.9 Calibration
1. Press [Cal] to switch to the calibration menu.
– The LED next to [Cal] illuminates.
2. Depending on the set access rights, it may be
necessary to enter the four-digit code number using
the [Up] and [Down] buttons. Confirm using [OK].
3. Select a parameter for the calibration.
In order to avoid an overdosing, the controllers are
switched off, and the final control elements are closed.
11.9.1 Peculiarities for the calibration of chlorine
with pH compensation
11.9.2 Calibrating the pH value
Fig. 36 Calibrating the pH value
Caution
pH calibration is of prime importance,
since during the calibration of the chlorine
value, the device uses the already
calibrated measured value for pH as a
reference value.
Therefore the pH value must be calibrated
first!
Only then calibrate the chlorine value!
TM
0
3
6
718
4
506
slope / asym. pot.
cal result
cal. cycle 1-100 days
"Cal"
pH
cal. meas.
value
GRUNDFOS
DIN /
NIST
others
temperature
of buffer
solution
buffer 1/2
automatic reading of
- measuring water
temperature
- measuring signal
and automatic
calibration
cal result:
slope /
asym. pot.
on
manual
temp.