ToGa meters Fault Finding
1. Display, No display; check battery and battery connections, if you have
an active display got to 2.
2. Display reads 1, this means the connection between the probe and the body
of the instrument is faulty, check probe connections, plug and wiring. If you
observe a reading other than 1 go to 3.
3. Display reads a figure close to 100, or within a few percentage of 100%.
Adjust instrument to 100% and put probe into water to a depth of 200mm and leave for 30
minutes. Take a note of the reading, and then increase the depth of the probe to
1200 mm and leave for 1 hour. If the reading increase by 10% or close to 10% on
increasing the depth of the probe from 200mm to 1200mm then it means that there is a hole
in the membrane and that the membrane needs to be changed. If the reading does not
increase go to 4.
4. Remove the probe from the water and allow to dry for 24 hours, and the set
reading to 100%. Cup you hands around the probe and breath heavily onto the probe.
The reading displayed on the instrument should jump by about 2% to around 102% and then
fall back to 100%. If this happens the probe is functioning okay.
5. If none of the points 1 to 4 above allows you to trace the problem,
please contact Dryden Aqua.
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