C200 SOFTWARE
Instruction Manual C200 Part2 A1.doc
optek Danulat GmbH • D-45356 Essen • Germany
page 40
4.1.6 Grab Calibration (pH Only)
Sensor A: Buffer Method (pH probes only)
Select Grab calibration method.
Adjust Value
ph and Adjust are shown alternately on the upper display line. The displayed pH
value is the reading sampled by the analyzer as this frame is selected and is
held until the display is advanced to the next frame. Use the and keys to adjust
the displayed value (in 0.01pH increments) to match the pH value of the
measured grab sample.
Notes.
• If the displayed value is adjusted by more than ±3pH, WARNING - OFFSET is
shown on the lower display line. If the measured grab sample value is correct
and the analyzer reading has not been overadjusted, clean the electrode, check
the sensor connections and try again.
• If the displayed value is adjusted by ±5pH, OUT OF RANGE is shown on the
lower display line, indicating that maximum adjustment has been reached.
Further adjustment is not possible.
Slope Value
% slope value.
The value generated during the last valid two-point calibration, between the
programmed minimum % slope value (see Set Min Slope – Section 5.1.3) and
105%, is displayed.
pH check value.
The value generated during the last valid two-point calibration, adjusted by the
value applied in Adjust Value (above), is displayed.
Note. The pH check value is reset to the previous, valid check value if a single-
or two-point calibration is carried out after a grab calibration.
Sensor B (dual input analyzers only) calibration is identical to
Sensor A calibration.
Probe Type for Sensor B (dual input analyzers only) set to Redox or
ORP and Enable Cals. set to No (Section 5.1.3) – return to top of
page.
Alter Sec. Code not set to zero (Section 5.1.8) – see Section 5.1.1
Alter Sec. Code set to zero (Section 5.1.8) – see Section 5.1.2.
A: Adjust Value
9.18
pH
25.0
Deg.C
Sensor Cal. A
A: Slope & Check
100.0
%
7.00
pH
A: Buffer Method
-----
Grab
SECURITY CODE
CONFIG. DISPLAY
Sensor Cal. B
SENSOR CAL.
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