38
Alternative method using the calibration lute
Instead of unscrewing the electrode from the measuring cell, the
electrode can be left in the measuring cell, and the "calibration
lute" below the electrode at the measuring cell can be used.
1. Unscrew the calibration lute, fill with buffer solution 1, screw
back in and calibrate.
2. Unscrew the calibration lute again, rinse with water, fill with
buffer solution 2, screw back in and calibrate.
3. Unscrew the calibration lute again, rinse with water and screw
back in.
Enabling/disabling the display of the pH calibration interval
1. CALIBRATION > pH > CAL. CYCLE > [OK].
2. (Interval) OFF > [OK] or
3. (Interval) ON > [OK].
5.13.3 Performing redox calibration
The electrode sends the voltage (in mV), that corresponds to the
redox value, to the control system. It indicates the voltage of all
ions in the water (summation parameter).
1. Prepare a glass jar with the redox buffer solution with a
known mV value.
2. Press [Cal].
3. REDOX > [OK].
4. MEASURED VALUE > [OK].
5. Turn off the measuring cell water supply and have a bucket to
hand.
6. Unscrew the redox electrode from the measuring cell. Use the
bucket to catch any water that runs out. See the end of the
section
Alternative method using the calibration lute
7. Immerse the redox electrode in the glass jar containing the
redox buffer solution.
8. In the display, set the mV value of the redox buffer solution >
[OK].
The mV value of the redox buffer solution is measured.
9. CAL. RESULT > [OK].
The REDOX OFFSET value is displayed as the result (for
example –2 mV). This is the deviation between the entered mV
value and the measured mV value of the buffer solution.
The control system corrects the measured value of the redox
value in the water of the main line by the offset value.
10. Remove the redox electrode from the buffer solution, and
rinse with water.
11. Screw the redox electrode back into the measuring cell.
12. Turn on the measuring cell water supply.
13. Dispose of the buffer solution. Do not pour it back into the
bottle.
14. Pour the contents of the bucket down the drain.
Redox calibration has been completed.
Alternative method using the calibration lute
Instead of unscrewing the electrode from the measuring cell, the
electrode can be left in the measuring cell, and the "calibration
lute" that is below the electrode at the measuring cell can be
used.
1. Unscrew the calibration lute, fill with buffer solution, screw
back in and calibrate.
2. Unscrew the calibration lute again, rinse with water, and
screw back in.
Enabling/disabling the display of the redox calibration
interval
1. CALIBRATION > REDOX > CAL. CYCLE > [OK].
2. (Interval) OFF > [OK] or
3. (Interval) ON > [OK].
5.13.4 Responding to calibration errors
1. If, for example, 4.0 pH is selected in the display, but the
electrode is immersed in a 7.00 buffer solution, the following
error message is displayed: BUFFER ERROR.
– Press [Esc] to abort calibration, and repeat the process
correctly.
2. If the slope or asymmetry is outside the norm, the following
error message is displayed: SLOPE ERROR, ERROR
ASYM. POT.
(This is caused by
using an old electrode or buffer solution.
Check
the expiry date.)
– Press [Esc] to abort calibration, replace the electrode, and
repeat calibration.
3. If the electrode does not send a stable measuring signal to
the control system within 120 seconds, the following error
message is displayed: CALIBRATION TIME EXCEEDED.
(This is caused by
using an old electrode.)
– Press [Esc] to abort calibration, replace the electrode, and
repeat calibration.
CALIBRATION
CHLORINE DIOXIDE
REDOX
REDOX
CAL. MEAS. VALUE
CAL. RESULT
CAL. CYCLE
CAL. MEAS. VALUE
225 mV
CAL
Please wait
CAL. RESULT
REDOX OFFSET
-2 mV
Summary of Contents for Oxiperm Pro OCD-162-10
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