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.
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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.
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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’.
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- 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.
Additional Support
For additional training on any of these topics, explore our available Metrohm Titration Training courses or learn more about our Metrohm Custom Training options.