Introduction
Refilling the mercury reservoir is a routine maintenance procedure that helps ensure reliable electrode performance and consistent voltammetric measurements on the 746 VA Trace Analyzer with an MME Pro. This article walks through safely refilling the mercury reservoir and properly sealing the electrode to prepare it for continued operation.
Before beginning, ensure you have all required tools and accessories available, including mercury, a syringe with needle, the MME key, collection tray, electrode stand, and a Mercury Catcher for collecting any spilled mercury. Follow the video in sequence to safely complete the refill procedure before returning the electrode to service.
Video
Procedure
- The following tasks must be carried out over the plastic tray! In addition to the MME pro, the following are required for refilling mercury: collection tray, electrode stand, mercury, syringe with needle, the MME key, and the "Mercury Catcher" for collecting any spilled mercury droplets.
- Remove the electrode from the measuring stand. First, ensure that the electrode is switched off, then unscrew the nitrogen connections and remove the electrode cable.
- Slowly pour mercury into the electrode. It should be filled to the "max. fill" mark (max. 6 mL) at most.
- Using the key, tighten the screw cap until it stops. The opening of the mercury reservoir will then be securely closed.
- Small amounts of spilled mercury can be collected using the mercury catcher (part number 6.2406.000).
Additional Support
If you encounter any issues or need additional help, please submit a support ticket through Metrohm Technical Support.
For more detailed training on any of these topics, explore our Metrohm Custom Training options.