This help note describes how to correct ‘solution missing’ error in Tiamo software.
Technology: Titration
How do you know you have this problem?
Due to one of two possibilities, you have encountered the following error:
How can I resolve it?
To find the source of the error, check Configuration > Titrants/Solutions.
- IMPORTANT – On line 10, we see a solution named “Silver Nitrate”.
- The 4th column (Type) in the table displays 'IDU'.
- 'IDU' means the Silver Nitrate solution is attached to an Intelligent Dosing Unit, i.e. a dosing unit with data chip. This column may also read 'IEU' which stands for Intelligent Exchange Unit.
- The 5th column (Dosing Device) displays '907_2/D2'. This means the dosing unit is currently connected to device 907_2 on MSB port 2.
- If your solution is being actively recognized and read, i.e. there is an entry in the ‘Dosing Device’ column in Titrants/Solutions, continue with Scenario 1.
- If your solution is NOT being actively recognized and read, i.e. there is NOT an entry in the ‘Dosing Device’ column in Titrants/Solutions, continue with Scenario 2.
Scenario 1
The cause of the error is a discrepancy between how the titrator is configured (physical connection of dosing device) and how the method is programmed.
- Click Method tab.
- Click File > Open – select the method attempting to run that is showing an error.
-
Double click on the command causing this error.
- In this example, the command name is ‘DET U’ per the error message shown on Figure 1.
- IMPORTANT – Under ‘Dosing Device’ section, dosing device 1 is programmed for solution ‘Silver Nitrate’. We know this by navigating to Configuration > Titrants/Solutions. Silver Nitrate is on dosing device 2 (907_2/D2).
- Update the method – changing dosing device designation from 1 to 2.
- Click OK, then File > Save to save changes made to the method.
- Alternatively, you can change the physical connection of the dosing device to the titrator – moving dosing device cable from MSB port 2 to MSB port 1.
- Note: Exit Tiamo software before disconnecting dosing devices from the titrator.
Scenario 2
The cause of this error is the dosing unit or exchange unit is not properly communicating with the titrator, likely due to a faulty data chip. To overcome this error state, we have two options.
- Submit a request for further assistance from Metrohm Technical Support at support.metrohmusa.com – requesting assistance with procuring a new data chip.
-
Program the method to run with Solution: ‘not defined’.
- Click Method tab.
- Click File > Open – select the method attempting to run showing the error.
- Double click on the command causing this error. In this example, the command name is ‘DET U’ per the error message shown in Figure 1.
- Confirm physical connection of dosing device to rear of titrator, i.e. MSB port number connection.
- Ensure ‘Dosing Device’ number programmed in method matches the physical connection to MSB port number on rear of titrator.
- Use drop-down menu under Solution to select ‘not defined’.
-
- Click OK, then File > Save to save changes made to the method.
Other Ideas
Remove the defective data chip.
- The dosing unit chip resides on the top facing portion of the dosing unit.
- Remove dosing unit housing from cylinder/distributor (press button above “Vent” and rotate counterclockwise).
- Using your finger, push up on underside of data chip from the inside of the housing.
Submit a request for further assistance from Metrohm Technical Support at support.metrohmusa.com.