Troubleshooting Guide – Coming Soon!

Check back here for our very own troubleshooting guide. It will walk you through all the steps we take with your instrument to diagnose or repair your SC series devices! Coming Soon!

Additional Information

Troubleshooting pH issues on the SC-300 or SC-200

Replacement SO2 Electrode Purchasing Guide

pH: how to measure it, what it is, and how to use it

Managing pH and TA

Reagent Tests

The KHP test: Verifying TA Titrant Accuracy

The Ascorbic Acid test: Verifying SO2 Reagents Accuracy

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4 thoughts on “Troubleshooting

  1. I absolutely LOVE my Vinmetrica SC-200 & SC-300 meters! Accurate, reliable information every time!

    But now, they need a little maintenance love from me!

    I would like to purchase 4 of the bottles with the cap & rubber gasket used for storing the probes in the buffering solution when not in use. One has a little split in the plastic side wall. It is not leaking, but 2 others are showing “stress lines” also. I want a 4th for a spare.

    I do not have a part number, so I appeal to you for assistance.

    1. Roger,
      Thank you for your inquiry. We are glad to hear that you love your Vinmetrica units. We always recommend doing some basic maintenance on them every year. The replacement storage solution vials can be found here: . They do not come with fresh solution so you may want to get some of that too. We recommend replacing the solution at least once a year or if your solution gets cloudy or has debris in it.
      Let me know if you need any additional help.

  2. I have sc300 that is giving wacky readings. I seem to remember there were two test to do that would tell me if a problem, but cant find them. I remember one was to ground the probe. Thanks

    1. Tracy,
      Thanks for contacting us. One of the tests is to ground out the instrument. You are correct. To test the functioning of the instrument:

      1. Be sure the battery is good per the manual’s instructions.

      2. Remove the electrode to expose the BNC connector at the back of the instrument. Turn on the instrument and select SO2 mode. Short out the terminals on the connector, using a paper clip or similar metal piece to touch the center pin of the connector to its outer metal sheath. The device should indicate “STOP” with its red LED and buzzer or beeper. If this does not happen there may be a problem with the instrument; contact us for more information. Make sure you are making a good connection here.

      3. Connect the electrode and put it in about 20 mL of distilled water; add about 1 ml (half a bulb squeeze) of each of the acid solution and the reactant and swirl in the usual way keeping constant motion. The instrument may or may not indicate STOP as above. If it does not, add a drop of the SO2 Titrant solution. This should make the STOP condition occur. [If it doesn’t you may have an electrode problem read in the next section below how to fix this.] Now add one drop of a concentrated sulfite solution (1-10% is fine) and verify that the STOP signal ends and the PROCEED light illuminates. If this happens, your electrode is probably OK as well.

      4. Finally, you can check your SO2 reagents with the Ascorbic Acid Test, this is found on the trouble shooting page.

      Let us know how it goes.

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