multi EA 5100
Chlorine analysis with the Cl module 5100
65
Automatic end point routine
As soon as the indicator value is outside the operating range of the titration cell, the sys-
tem automatically triggers an end point routine. This routine may also be triggered be-
tween two measurements of a multiple determination. The End point routine status is
displayed in the Status analyzer window during this routine.
Indicator value is higher than the operating range:
¡
Silver ions are automatically produced. The electrolyte is set to the optimum operat-
ing range of 3000 Counts.
Indicator value is lower than the operating range:
¡
The software prompts the user to add the following solution to the measuring cell:
100 µl hydrochloric acid (HCl, 10 mg/l HCl)
¡
If the indicator value rises above the operating range again, silver ions will be pro-
duced automatically. The electrolyte is set to the optimum operating range.
When working with a MMS, the addition of chloride ions to the measuring cells can be
performed automatically if the indicator value goes below the operating range while an
analysis sequence is in progress. For this, the user must have prepared a suitable organic
chlorine solution and placed it in the intended position (110) on the sample rack.
After the end point routine, the measuring cell requires approx 15 min to achieve a sta-
ble cell potential. During this time, a negative drift can occur with indicator values below
3000 Counts.
Manual end point routine
For indicator values within the operating range, the end point routine can be started
manually via the System |End point routine menu item.
After the end point routine, the current indicator value is displayed in the Status ana-
lyzer window. If the current indicator value is within the operating range and the drift is
stable, the system is ready for measurements
8.3.2
Operating the analysis system
}
Place the measuring cell with electrodes and electrolyte solution in the detection
module and connect it to electricity.
}
Switch on the basic module and the detection module.
ü
The devices boot up. The status LED on the front of the basic module light up in
green after approx. 30 s.
ü
The LED on the front of the detection module flashes during the run-in period.
Depending on the detector, the run-in period can take up to 30 min. After this,
the LED will light up continuously. Starting a measurement is only then possible.
}
Open the gas supply and set the required gas pressure.
}
Switch on the PC.
}
Start the control and analysis software and login with your username and password.
}
Initialize the analysis system by clicking on [Initialize analyzer].
ü
The initialization and automatic detection of all connected components will be
carried out.
}
Ready the samples.
}
Activate a pre-existing method via the Method |Method - activate menu item.
}
Alternatively: Create a new method in the Method |Method - new menu. Select the
measurement parameter in the method. Release and activate the method.
}
Select Start |Start - Analysis in the menu.
}
Select an analysis group or create a new one and confirm via [OK].
}
Create an analysis sequence.
