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:
What can I try to resolve it?
The way to find the source of the error is to check your Configuration > Titrants/Solutions:
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IMPORTANT – On line 10, we have a solution named “Silver Nitrate”.
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‘Type’ in 4th column: IDU
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This means solution is on Intelligent Dosing Unit, i.e. a dosing unit with data chip. This could also say IEU which stands for Intelligent Exchange Unit.
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‘Dosing device’ in 5th column: 907_2/D2
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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 this error is a discrepancy between how your titrator is configured (physical connection of dosing device) and how the method is programmed.
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Click Method tab
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Click File > Open – select the method you’re trying to run showing error
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Double click on the command causing this error
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In this example, the command name is ‘DET U’ per the error message on page 1
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IMPORTANT – Under ‘Dosing device’ section, Dosing device 1 is programmed for Solution ‘Silver Nitrate’. We know from Configuration > Titrants/Solutions, Silver Nitrate is on dosing device 2 (907_2/D2).
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Update the method – changing dosing device designation from 1 to 2
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Click OK, then File > Save to save changes made to method
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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 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 faulty data chip.
To overcome, we have two options:
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‘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 your method to run with Solution: ‘not defined’
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Click Method tab
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Click File > Open – select the method you’re trying to run showing error
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Double click on the command causing this error
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In this example, the command name is ‘DET U’ per the error message on page 1
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Confirm physical connection of dosing device to rear of titrator (i.e. MSB port number connection)
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Ensure ‘Dosing device’ number programmed in method matches connection to MSB port number on rear of titrator
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Use drop down menu under ‘Solution’ to select ‘not defined’
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Click OK, then File > Save to save changes made to method
Other Ideas
To remove defective data chip:
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The dosing unit chip resides on the top facing portion of the dosing unit
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Remove dosing unit housing from cylinder/distributor (press button above “Vent” and rotate counterclockwise)
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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.