Performing Orp Calibration - Grundfos Oxiperm Pro OCD-162 Instrucciones De Instalación Y Programación

7. Select one of the three buffer types with [Up] or [Down].
Buffer type Buffer values
GRUNDFOS 4.01, 7.00, 9.18
DIN/NIST 4.01, 6.86, 9.18
The lower and upper buffer values can be
others freely adjusted (difference of at least 1 pH)
within the set pH measuring range.
8. GRUNDFOS > [OK].
buffer temp.
25 °C
9. Set the measured temperature of the buffer solution with [Up]
or [Down], confirm with [OK].
10. Shut off the water supply of the measuring cell.
11. Unscrew the pH electrode from the measuring cell. Use the
bucket to catch any water that flows out.
12. Immerse the pH electrode in the glass jar containing the first
buffer solution (for example 4.01 pH).
buffer value
4.01 pH
7.00 pH
9.18 pH
13. Select the buffer value of the buffer solution in which the
electrode is immersed (for example 4.01 pH). The voltage
[mV] at the electrode in the first buffer solution (for example
4.01 pH) is measured, and assigned to the pH value.
14. Remove the pH electrode from the buffer solution, and rinse
with water.
15. Immerse the pH electrode in the glass jar containing the
second buffer solution (for example 7.00 pH).
buffer value
4.01 pH
7.00 pH
9.18 pH
16. Select the buffer value of the buffer solution in which the
electrode is immersed (for example 7.00 pH). The voltage
[mV] at the electrode in the second buffer solution (for
example 7.00 pH) is measured, and assigned to the pH value.
The slope is the straight line between both measured values.
The unit is mV/pH.
The slope can be presented graphically:
mV
-0.6 mV
Fig. 20 Performing the two-point pH calibration
50
17. CAL result > [OK]. The result is displayed as the slope of the
CAL result
slope:
-57.88 mV/pH
asym.
-0.6 mV
18. Remove the pH electrode from the buffer solution, and rinse
19. Screw the pH electrode back into the measuring cell.
20. Open the water supply of the measuring cell.
21. Dispose of the buffer solution. Do not pour it back into the
22. Pour the contents of the bucket down the drain. pH calibration
For alternative method, see the operating and installation
instructions for the respective measuring cell.
Enabling and disabling the pH calibration interval
1. calibration > pH > CAL cycle > [OK].
2. Select "Off" to disable the interval or select "On" to enable it.
3. If the interval is enabled, enter it in days (1-100).

9.13.3 Performing ORP calibration

The electrode sends the voltage [mV] that corresponds to the
ORP value to the controller. It indicates the voltage of all ions in
the water (summation parameter).
1. Prepare a glass jar with ORP buffer solution with a known mV
2. Prepare an empty 10-liter plastic bucket.
3. Press [Cal].
calibration
chlorine dioxide
ORP
4. ORP > [OK].
ORP
CAL meas. value
CAL result
CAL cycle
5. "measured value" > [OK].
CAL meas. value
225 mV
6. Turn off the water supply of the measuring cell.
7. Unscrew the ORP electrode from the measuring cell.
8. Immerse the ORP electrode in the glass jar containing the
7
pH
9. In the display, set the mV value of the ORP buffer solution,
straight line, and the asymmetry (the asymmetry is the
deviation from the zero point at pH 7). In this example, one pH
unit corresponds to -57.88 mV.
with water.
bottle.
is completed.
value.
Use the bucket to catch any water that flows out.
ORP buffer solution.
confirm with [OK]. The mV value of the ORP buffer solution is
measured.