Optek CONTROL 200, Instruction Manual

Page: 60 / 135

C200 S
OFTWARE
Instruction Manual C200 Part2 A1.doc optek Danulat GmbH • D-45356 Essen • Germany page 38
4.1.5 Manual, Single- and Two-Point Calibration (pH Only)
Sensor A: Buffer Method (pH probes only)
Select the type of manual calibration required:
Man 1-Pt
– Manual, single-point calibration
Man 2-Pt – Manual, two-point calibration
Set Buffer Temperature
Deg.C (or Deg.F) and Adjust are shown alternately on the center display line. Use the UP
and DOWN keys to adjust the displayed temperature value to the required buffer
temperature (–20 to150°C or –4 to 302°F).
Note. If A: Buffer Method is set to Man 2-Pt, the temperature selected is used for both
buffers.
Calibrate Buffer (Single-Point Calibration) or Calibrate Buffer 1(Two-Point
Calibration)
Immerse Sensor A in the buffer solution.
pH and Adjust are shown alternately on the upper display line. Use the
UP and DOWN
keys to set the displayed pH value to the temperature-corrected pH value of the chosen
solution (see the datasheet provided with the solution).
Press the
DOWNSCROLL key to initiate calibration.
Note. To abort calibration, press the DOWNSCROLL key again at any time before
calibration is complete – see below.
Measured pH value from the last successful calibration.
Measured sensor output in millivolts.
When the measured sensor output stabilizes, press the
UP key to accept the calibration.
Cal. Accepted is shown for 2 seconds to confirm that the calibration has been accepted,
the display then advances automatically to the next frame.
The display then changes for 2 seconds to show the temperature-corrected buffer value in
the upper display line, then advances automatically to the next frame.
Two-point calibration selected – continued on next page.
Single-point calibration selected – continued on next page.
Abort Calibration
Select Yes or No.
Yes selected – return to the main menu.
No selected – calibration continues.
4.01
175
mV
A: Immerse Buf.2
A: Calibration
A: Abort Cal.
-----
Yes
A: SENSOR CAL.
A: Immerse Buf.2
A: Immerse Buf.1
4.00
pH
Deg.C
25.0
A: Buffer Method
Man
-----
1-Pt
A: Cal. Buffer 1
4.01
pH
A:Set Buf. Temp.
Deg.C
20.0
pH
Press button
when stable
A: Cal. Accepted
4.01
pH