ENGLISH
29
CURVE OF THE OXIDE/REDOX REDUCTION POTENTIAL (ORP)
Redox measurements depend on the stability of the pH level.
To obtain the mV value for programming, the operator must find the exact point that intersects the axis of the required ppm value, the
curve of the measured pH = the mV settings (axis on the left):
INSTRUMENT TROUBLESHOOTING
WARNING: ignoring the safety information may endanger your life or cause severe injuries!
ATTENTION: in the presence of gas or in premises saturated with gas, ensure you disconnect the device’s power supply for metering the
Chlorine gas; also ensure the power supply of other equipment making up the system is secured.
Before working on the unit, disconnect it from the mains
MALFUNCTION
POSSIBLE CAUSE
SOLUTION
1. Display OFF
No power supply
a. Check the electrical connections
b. Check whether the mains match the power supply shown on the
label.
Burnt smell
Check the board and replace it following authorisation by ETATRON
D.S.
2. The measurement on the display
remains steady
(there are no changes)
pH or RX levels are NOT
stable
Check again using a portable instrument or portable kit, especially
the pH for chlorine values.
The signal from the sensor
does not change
Repeat sensor calibration and if the problem persists, change the
electrode.
3. The measurement on the display
Electrical disruption from the
Check the local mains. Check the earthing system connections
