Grundfos DID Montage- Und Betriebsanleitung Seite 19

Performing "Offset" calibration
The "Offset" calibration is an in-situ calibration. The sensor must
not be removed from the flow cell.
1. Select "Offset" in the "Mode: " entry field with the [Up] and
[Down] buttons. Confirm with [OK].
Before taking a sample for calibration, flush the
sampling point 3-4 times with approximately 10 ml
each time.
2. Take a sample of approx. 10 ml.
3. While taking the sample, select "Sample 1 : " with the [Up]
and [Down] buttons. Confirm with [OK].
– The raw value of the sample is measured and stored in the
sensor.
4. Analyse the sample with a reference method and enter the
result into the "Lab 1:
" field with the [Up] and [Down]
buttons.
5. Select "Perform Calibration" with the [Up] and [Down].
Confirm with [OK].
– The calibration process starts.
The calibration result is shown in "Value:
The calibration coefficient is shown in "Offset", and stored in the
sensor.
Performing "Linear" calibration
1. Select "Linear" in the "Mode: " entry field. Confirm with [OK].
2. Take the sensor out of the flow cell or the tank.
3. Immerse the sensor into a beaker with the first reference
solution for "Sample 1 : ".
4. Let the sensor adapt to the solution until the displayed value
is stable, before measuring the raw value.
5. Read the value on the label of the first reference solution.
Select the value in the "Lab 1:
[Down] buttons. Confirm with [OK].
– Use a temperature-compensated value.
– The entire measuring range that can be expected at the
location should be covered between "Sample 1 : " and
"Sample 2 : ".
6. Select "Sample 1 : " with the [Up] and [Down] buttons.
Confirm with [OK].
– The measured raw value is shown and stored in the sensor.
7. Carefully rinse the sensor with distilled water three times
before measuring the second value.
8. Immerse the sensor into a beaker with the second reference
solution for "Sample 2 : ".
9. Let the sensor adapt to the solution until the displayed value
is stable, before measuring the raw value.
10. Read the value on the label of the second reference solution.
Select the value in the "Lab 2:
[Down] buttons. Confirm with [OK].
– Use a temperature-compensated value.
11. Select "Sample 2 : " with the [Up] and [Down] buttons.
Confirm with [OK].
– The measured raw value is shown and stored in the sensor.
12. Select "Perform Calibration" with the [Up] and [Down] buttons.
Confirm with [OK].
– The calibration process starts.
The calibration result is shown in "Value:
The calibration coefficients are shown in "Offset" and "Slope",
and stored in the sensor.
".
" field with the [Up] and
" field with the [Up] and
".
"Span" calibration
P1 Calibrate expert...
Type:
►
Mode:
Perform Calibration
Value:
Private:
P1 Calibrate expert...
Value:
►
Private:
Lab 1:
Sample 1 :
Slope
Type:
Calibration type: "Local" (default) or "Global" (for
factory calibration)
Mode:
Calibration mode: "Offset", "Linear", "Span"
Value:
The value measured in the current sensor
calibration
Private:
Internal sensor value which is only relevant for
service.
If a pH::lyser or redo::lyser is connected, this value
is the quality factor of the sensor. 0 means bad
quality and 1 means perfect quality.
If another sensor connected, this value is the
currently measured raw value of the sensor.
Lab 1:
The value received from the analysis of the sample
with a reference method can be entered.
Sample 1 :
The raw value of the sample measured by the
sensor is displayed. The raw value can have a
different unit.
Slope
The calibration coefficient
Performing "Span" calibration
The "Span" calibration is an in-situ calibration. The sensor must
not be removed from the flow cell.
1. Select "Span" in the "Mode: " entry field with the [Up] and
[Down] buttons. Confirm with [OK].
Before taking a sample for calibration, flush the
sampling point 3-4 times with approximately 10 ml
each time.
2. Take a sample of approx. 10 ml.
3. While taking the sample, select "Sample 1 : " with the [Up]
and [Down] buttons. Confirm with [OK].
– The raw value of the sample is measured and stored in the
sensor.
4. Analyse the sample with a reference method and enter the
result into the "Lab 1:
" field with the [Up] and [Down]
buttons.
5. Select "Perform Calibration" with the [Up] and [Down] buttons.
Confirm with [OK].
– The calibration process starts.
The calibration result is shown in "Value:
The calibration coefficient is shown in "Slope", and stored in the
sensor.
Local
Span
0.50
3.0
0.50
3.00
0.50
3.00
6.00
".
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