Aqualabo Acteon 5000 Stacsense Calibration Procedure For Codeq Bodeq Toceq Parameters User Guide

• The sensor will automatically calculate the coefficient needed
  to set the Green zero.

The user manual also mentions that the SAC254 parameter can be
correlated with other parameters such as TOC or COD to provide
equivalence data. To establish this correlation, it is recommended
to measure SAC254 on samples of polluted water over a few days. The
user manual provides an example of correlating SAC254 with COD
using multiple samples.

Example for COD adjustment:

To access the calibration menu for adjusting the offset and
slope of each parameter, follow the path provided in the user
manual specific to the ACTEON 5000 model.

Note: This calibration guide is valid until June 2023. For more
information or support, contact AQUALABO at:

Address: 90 Rue du Professeur Paul Milliez, 94500 CHAMPIGNY SUR
MARNE

Tel: +33 (0)1.55.09.10.10

Fax: +33 (0)1.55.09.10.39

Email: [email protected]

Website: www.aqualabo.fr

Calibration guide STACSENSE
ACTEON 5000- STACSENSE
ACTEON 5000-STACSENSE : Calibration procedure for CODeq, BODeq, TOCeq parameters

1. Reference Optical Signal 1.1. Generalities:
This is a measurement in clear, pollution-free water, without bubbles or particles in suspension, at stabilized temperature.
1.2. Detailed Calibration of SAC254 with ACTEON5000:

Clear water: SAC254 Calibration (UV and GR Transmittance calibration)

Modbus

Step Name

Calibrated Parameter Description

Sensor conditions

1

Coeff 1 SAC254 (Param. 1)

2

Coeff 3 SAC254 (Param.1)

UV User Clear Water Tx Comp Slope Clear water

GR User Clear Water Tx Comp

Slope

Clear water

Reference Input Value 0
0

Step 1: Zero adjustment of the UV light source (UV absorbance at 0, UV transmittance at 1) Place the sensor under the following conditions: clear water stabilized at temperature T, degassed. The coefficient required to adjust the UV zero of the sensor is calculated automatically by the sensor.
Step 2: Zero adjustment of the green light source (Green absorbance at 0, Green transmittance at 1) The coefficient needed to set the sensor’s Green zero is calculated automatically by the sensor.

Calibration guide STACSENSE MAJ June 2023

AQUALABO 90 Rue du Professeur Paul Milliez 94500 CHAMPIGNY SUR MARNE Tel.: +33 (0)1.55.09.10.10- Fax : +33 (0)1.55.09.10.39 [email protected] – www.aqualabo.fr

Calibration guide STACSENSE
ACTEON 5000- STACSENSE

Measure is stable

STEP 1 : In distilled water

STEP 2 : In distilled water Back to main screen

Measure is stable

Calibration guide STACSENSE MAJ June 2023

AQUALABO 90 Rue du Professeur Paul Milliez 94500 CHAMPIGNY SUR MARNE Tel.: +33 (0)1.55.09.10.10- Fax : +33 (0)1.55.09.10.39 [email protected] – www.aqualabo.fr

Calibration guide STACSENSE
ACTEON 5000- STACSENSE

2. Equivalence COD, BOD or TOC:
SAC254 is a parameter for organic substances dissolved in water that absorb UV radiation. It provides information on water contamination. Despite the similarities, the parameters can not always be inter-converted. However, a correlation can be established between the SAC254 parameter and another parameter such as TOC or COD. The STACSENSE sensor then provides equivalence data.
To obtain the correlation, it is recommended to measure the SAC for a few days on samples of polluted water. The conditions for obtaining useful data for efficient conversion represent daily monitoring with periods of low and high loads, as in the case of urban effluent. During these peak periods, you must:
· Read the SAC254 value delivered by the STACSENSE sensor (in Abs/m). (noted SAC254 STACSENSE), · Take a representative fluid sample from the sensor location, · Stabilize and store successive samples at 4°C until the time of analysis, · Perform laboratory analyses of the COD parameter to be correlated; (noted laboratory COD in mg/L), · Record the results in an excel file (SAC254 from STACSENSE, COD concentration from laboratory) · Place the points obtained in a graph (vertical axis SAC254 STACSENSE, horizontal axis COD laboratory) · Draw the linear regression line and display the corresponding equation & and the coefficient of determination (R2)
Example for COD adjustment:

Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Sample 6 Sample 7 Sample 8 Sample 9 Sample 10 Sample 11 Sample 12 Sample 13 Sample 14

SAC254 STACSENSE (Abs/m)
0 1,75 2,35 2,72 2,68 9,52 10,95 16,42 22,73 21,92 22,05 25,4 26,22 30,79

COD labo (mg/l)
0 2 2,8 3 3,2 10,5 12 19,7 25 26,3 26,7 27,3 28 35,4

Calibration guide STACSENSE MAJ June 2023

AQUALABO 90 Rue du Professeur Paul Milliez 94500 CHAMPIGNY SUR MARNE Tel.: +33 (0)1.55.09.10.10- Fax : +33 (0)1.55.09.10.39 [email protected] – www.aqualabo.fr

Calibration guide STACSENSE
ACTEON 5000- STACSENSE
The linear regression line proposes a new relationship between the UV absorption at 254 nm (CAS254) and the CODeq -> CODeq = 1.1279 * CAS254 + 0.0991. Since the coefficient of determination R2 is close to 1 (R2= 0.9937), this relationship is considered reliable. The new slope is therefore equal to 1.1279 and the new offset to + 0.0991. You have to replace the slope value 1.81 by 1.1279 and Offset value 0 by 0.0991 COD, BOD or TOC equivalences are calculated directly in the sensor according to a first-degree law. This pair of coefficients (offset and slope) is specific to each parameter.
ACTEON 5000 calibration menu. Example for CODeq parameter
In order to access the menu to adjust the Offset and the slope of each parameter from the SAC254 please follow the following path example for the slope):

Calibration guide STACSENSE MAJ June 2023

AQUALABO 90 Rue du Professeur Paul Milliez 94500 CHAMPIGNY SUR MARNE Tel.: +33 (0)1.55.09.10.10- Fax : +33 (0)1.55.09.10.39 [email protected] – www.aqualabo.fr

Calibration guide STACSENSE
ACTEON 5000- STACSENSE

Enter an operator name and validate with the icon
On the screen corresponding to the calibration management a new
icon at the bottom left appears

Enter the OFFSET value 0.0991 in our example -> 0.09

Enter the SLOPE value 1.1279 in our example -> 1.13

Back to main screen
The message “Communication pending” indicates that the calibration process is in progress.
Calibration guide STACSENSE MAJ June 2023

AQUALABO 90 Rue du Professeur Paul Milliez 94500 CHAMPIGNY SUR MARNE Tel.: +33 (0)1.55.09.10.10- Fax : +33 (0)1.55.09.10.39 [email protected] – www.aqualabo.fr

References

• Aqualabo - World leader in water monitoring and analysis
• Aqualabo - World leader in water monitoring and analysis