Pool Sensor testing

Pool chlorinators are very fragile sensing devices and often need looking after. To assist, it is essential to have an ORP or pH simulator which can be used to check the circuitry of the ppol chlorinator. With a simulator, simply dial up the pH value - say 4.00pH, check the chlorinator reads 4.00pH (with a tolerance of +/-0.1pH) and then flick the 100MR resistor and check the reading is the same after 30seconds or so. If the machine is reading OK, the problem is either in the sensor or the pool.

We usually test the pH values at 4.00pH, 7.00pH and 10.00pH. The same applies for for ORP with reading of 0mV, 400mV and 700mV.

Note that pH sensors are much more sensitive than ORP sensor. A pH sensor gives out 53mV per pH, while an ORP sensor ranges from 0 to 700mV.