Siemens ULTRAMAT 23, Manual, Page: 114 / 244

Functions
8.2 Calibration
ULTRAMAT 23
114
Manual, 3/2016, A5E37100388-003
The analyzer then compares the setpoint and actual value
(measured value) of the calibration. If the deviation between
the values is within the tolerance, the adjacent message 'o.k.'
is output.
If the actual value deviates by more than approx. 20% from the
setpoint determined in the factory, the message 'not o.k.' ap-
pears instead (no calibration possible).
By pressing the <ESC> key you can exit the calibration procedure.
8.2.3 Calibration: Electrochemical oxygen measuring range
In this menu you can call the following functions for the elec-
trochemical oxygen sensor in order to:
• Enter the installation date of the electrochemical O
2
sensor
•
Recalibrate the zero point of the electrochemical O
2
sensor
• Recalibrate the measuring range of the electrochemical O
2
sensor
8.2.3.1 Calibration: O2 measuring range: Sensor inst. date
You must enter the date every time a new sensor is installed.
The entered date is checked for plausibility. A calibration
(AUTOCAL) with ambient air is subsequently carried out.
A check is also carried out during this procedure that the probe
voltage is greater than 9 mV. If this is not the case, a fault
message "Probe voltage too low" is output.