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pH calibration default settings
Parameter
Buffer set selection
Buffer 1 pH-value
Buffer 2 pH-value
Buffer 3 pH-value
Compensation
12 Calibrating a pH measuring chain
The calibration default settings enable the calibration routines to be accessed in
the particular calibration menu.
Calibration routines that are not enabled are not visible in the calibration menu.
Additional calibration default settings are explained in the following table.
j
Possible settings
Buffer set 1 to 3
factory-preset:
•
Buffer set 1:
Reference buffer solutions for
calibrating pH measuring in-
struments acc. to DIN 19266
•
Buffer set 2: Technical buffer
solutions, preferably for cali-
brating and adjusting technical
pH measuring instruments
acc. to DIN 19267
-2 to +16 pH
-2 to +16 pH
-2 to +16 pH
Fixed compensation temperature
Temperature input
Interface
Explanation
Buffer set tables contain pH values for
selected buffer solutions as a function of
temperature. These tables can be pre-
pared/edited using commercially avail-
able standard solutions (DIN 19266,
NIST; otherwise, technical buffer solu-
tions etc.) or on the basis of customer-
specific information. With their aid,
buffer solutions can be recognized auto-
matically when calibrating. The pH val-
ue data for the buffer solutions used
must be contained in the buffer set table
selected.
When a buffer set is selected, this acti-
vates automatic buffer recognition and
the entry fields for the settings "pH buf-
fer 1 to 3" are hidden.
You need the JUMO PC setup program
to edit buffer set tables.
manual entry of the pH-values of the
buffer solutions being used for the cali-
bration
Depending on the selected Calibration
routine, the corresponding entry fields
for "pH buffer 1 to 3" are displayed.
The pH-values of the buffer solutions
used must be at least 2 pH apart.
Fixed compensation temperature:
Compensation with a fixed temperature
value that is entered in the configuration
item "Compensation temperature".
Temperature input: The integrated
temperature probe of the pH sensor
supplies the compensation tempera-
ture.
Interface: The AQUIS touch S trans-
mits the compensation temperature to
the sensor electronics via the interface.
The source of the compensation tem-
perature is set in the configuration point
"Compensation temperature".
57
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