tiamo error 009-141, 874 error 13-4-1-255
Technology: Titration
How do you know you have this problem?
You have received the following error:
What can I try to resolve it?
The majority of the time, gas flow error is caused by blockage.
Follow these steps to troubleshoot the gas flow error:
- Ensure all tubing connections are tight
- Ensure the gas tubing in the vessel is not crimped
- If using pressurized air or gas, ensure the following:
- Regulator is set to <4psi
- The tank is not empty
- The valve on cylinder is open
- Inspect needle holder (6.2049.040 or 6.2049.050) for damage
- Clean or replace injection needle (6.2816.070) and outlet needle (6.2816.080)
- Needles can be flushed with methanol or sonicated for faster cleaning
- Clean or replace the transfer tube
- Tube can be flushed with methanol
Here is a video to walk you through the process: HOW TO troubleshoot gas flow issues on a Metrohm 874 Karl Fischer Oven system
- Evaluate impact of molecular sieve by connecting tubing for ‘to’ and ‘from’ of the tower to bypass the molecular sieve bottles
- Disconnect ‘from’ tubing from the tower (see below)
- Disconnect ‘to’ tubing from the cap of molecular sieve bottle (see below)
- Connect this end of the ‘to’ tubing to the ‘from’ port on the tower
- If error no longer occurs with sieve bypassed, replace molecular sieve
What are some ways to prevent the problem?
- Use Metrohm KF oven vials and septum caps
- Regularly inspect and clean needles / transfer tube
- Regularly inspect, regenerate or replace molecular sieve
- The molecular sieve can be regenerated at 300 °C in the drying oven. The regeneration time is at least 24 hours. The molecular sieve is then placed in a desiccator for cooling down and afterwards stored in a glass bottle with an airtight seal.
Other ideas
‘Submit a request’ for further assistance from Metrohm Technical Support at support.metrohmusa.com should error persist after these troubleshooting measures have been taken.