Calibration - Grundfos Conex DIA-1 Montage- Und Betriebsanleitung

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.
3. Press [OK] to switch to the "measured value"
menu.
In order to avoid an overdosing, the controllers are
switched off, and the final control elements are
closed.
Peculiarities for the calibration for chlorine with
pH compensation
• Press [OK] to switch to the "calibration" menu.
Two options are available: (measured value)
"chlorine" (first line) and "pH" (second line).
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
Note
reference value.
Therefore the pH value must be calibrated
first!
Only then calibrate the chlorine value!
11.9.1 Calibrating the pH value
"Cal"
cal. meas.
pH
value
manual
temp.
cal result
cal. cycle
Fig. 36 Calibrating the pH value
GRUNDFOS
temperature
DIN /
of buffer
NIST
solution
others
slope / asym. pot.
on
1-100 days
buffer 1/2
automatic reading of
- measuring water
temperature
- measuring signal
and automatic
calibration
cal result:
slope / asym.
pot.
43