| Testing ORP probes with Iodine
Something I picked up on from ENC.
Pick up a std 2 ounce bottle of Tincture of Iodine (USP Grade) and dilute it with 473 mL of RO/DI water. After thoroughly mixed, place enough in a small container to check the probe. It should read between +440 and +455 mV. If it does not you have a probe issue, either dirty or it needs to be replaced.
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