ProMinent DULCOTROL DWCa, Assembly And Operating Instructions Manual, Page: 76 / 140

Defining buffer detection
There are 2 buffer detection options with 2-point
calibration.
[Presetting]: select 2 buffers from the 4 possible
buffer sets. During calibration, adhere to the
selected order e.g. Buffer value 1: pH 7 and Buffer
value 2: pH 4:
–
ProMinent ® (pH 4; 7; 9; 10). (default setting)
–
NBS/DIN 19266 (pH 1; 4; 7, ; 9).
–
DIN 19267 (pH 1;4; 7; 9; 13).
– Merck + Riedel ® (pH 2; 4; 7; 9; 12).
The buffer sets differ in their pH values and tem‐
perature dependencies set in the controller. The
pH values at the different temperatures are also
printed on the buffer containers.
[Manual]: enter the buffer value with the associated
temperature into the controller.
–
The pH values of the buffer solution, at temper‐
atures other than 25°C, are printed in a table
on the label of the buffer bottle.
Select the available buffer.
CAL pH
Buffer manufacturer
Calibration process
A1512
Manual
Buffer detection
2 point
Manual
Buffer value 1
Buffer value 2
Buffer temperature
ProMinent
pH 7
pH 4
Buffer temperature 25.0 °C
Fig. 36: Example: Display in [CAL-Setup]]
Used buffer
Dispose of the used buffer solution. For more infor‐
mation: refer to the material safety data sheet for
the buffer solution.
Valid calibration values
Valid calibration:
–
Zero point -60mV…+60 mV
– Slope 55 mV/pH…62 mV/pH
Two test containers with a buffer solution are required for calibra‐
tion. The pH values of the buffer solutions must be at least 2 pH
values apart. Thoroughly rinse the sensor with water when
changing the buffer solution.
Continuous display ➨ .
Calibrating the controller diaLog DACb
76