After start-up (i.e. after three beeps in succession), the PyraMed issues a short beep and tests the ppm of the water. For a new batch of distilled water, this should indicate one or two flashes on the blue LED. A higher number of flashes at this stage means that there are some impurities in the water. If for any reason the ppm is greater than 20, the PyraMed will issue a warning beep, and will stop.
Assuming that the PyraMed electronics is OK with the distilled water, the production process begins. Every four minutes the unit issues a short beep indicating a measurement has taken place, and the result will be shown as flashes on the blue LED.
Once the unit is showing more than 5 ppm, the rods can be wiped clean, the unit placed back in the water and the production process continues.
When the ppm has reached 12 ppm, the production cycle stops, the electrode voltage is automatically switched off, and the unit beeps every 10 seconds (also the white LED comes on briefly underneath the unit). The unit will continue to beep every 10 seconds to remind you it has finished. You can then turn off the unit.
Sometimes if there has been a build-up of silver oxide on the surface of the water, it is useful to clean the rods again, and turn the unit back on, and let it run. Since there is silver content at this stage, this will show as flashes on the blue LED. This is a good indication of the ppm. The unit will now reach 12 ppm in short measure (say from a reading of 10 ppm), and will beep every 10 seconds as before to indicate it has finished.