Knick Stratos Pro A401B PH, User Manual

Page: 55 / 196

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Support of Pfaudler Sensors
or pH sensors with a zero point other than pH 7 and/or deviating slope,
e.g. pH sensors with a zero point at pH 4.6
This requires an additional function (TAN). The option is enabled in the
SERVICE / OPT: PFAUDLER menu (see page 148).
For Pfaudler standard pH sensors, you can specify a nominal zero point and a
nominal slope.
In addition, you can enter a pHiso value.
The additional entries appear in the CONFIGURATION / SENSOR menu:
SNS: NOM ZERO (default: 07.00 pH)
SNS: NOM SLOPE (default: 59.2 mV)
SNS: PH_ISO (default: 07.00 pH)
Prior to measurement, you must enter the values for nominal zero and slope and
the isothermal intersection point pHiso as provided by the manufacturer and
perform a calibration using suitable buffer solutions.
When you use a Memosens Pfaudler sensor, the data will be read from the sensor or
will be set to standard values. Here, you do not have to make entries. The respective
menu items will be suppressed.
The nominal ZERO/SLOPE values are required for the proper functioning of the
sensor monitoring and calibration functions (Sensoface, Calimatic), they do not
replace an adjustment (calibration)!
Typical values
Probe Pfaudler
enamel probes
(Pfaudler
specifications)
Probes with
absolute pH
measurement
and Ag/AgCl
reference system
Probes with
absolute pH
measurement
and Ag/A (silver
acetate) reference
system
Differential pH
probe
Nom. slope 55 mV/pH 55 mV/pH 55 mV/pH 55 mV/pH
Nom. zero pH 8.65 pH 8.65 pH 1.35 pH 7 ... 12
pHiso pH 1.35 pH 1.35 pH 1.35 pH 3.00
Please note:
Please refer to the operating instructions of the respective sensor for more
information on functioning, installation, calibration and configuration.
Configuration