28
ENGLISH
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
changes all the time (measurement
fluctuations)
Electrical disruption from the
local mains
Check the local mains. Check the earthing system connections
Micro-electrical disturbances
in the measured fluid
Check instrument calibration, if the instrument measures correctly
eliminate the electrical disturbances and refer to point A
4.
The sensor calibration procedure
cannot be completed
Old or contaminated buffer
solution kit
Change buffer solution and use a portable kit
Faulty sensor
Adhere to the recommendations below
IMPORTANT TESTS:
in cases 2, 3, 4 above, always test operation of the unit with the following steps:
A.
Take down the unit from the system and install it in another room or laboratory without connections to other devices, but directly to the local
mains.
B.
Recreate in a container with fresh water the chemical-physical conditions of the system in terms of pH.
C.
Program the unit and calibrate the electrode
a.
If the results show correct unit operation, this means the issues lie within the system.
b.
If the problem persists, replace the sensor with a new one; if the problem continues, the unit is faulty, contact the Manufacturer or
authorised Dealer.
5.
The setpoint relay does not close the
contact
Incorrect setpoint
Correct the setpoint
Incorrect setpoint mode
Change the setpoint operating mode, direct or reverse, on the
functions menu
REMEMBER
: unit with universal voltage 100-250 VAC (±10%) or 9-24VDC. If the real voltage is constantly at the limit (minimum or
maximum), or when the peaks are far above the mentioned range, the unit input is electrically protected against voltage fluct uations;
outside the range mentioned above, the instrument does not work and the electric circuit must be replaced.
It is recommended
to use voltage protections, check the earthing system and, when other equipment is connected in parallel, use a
transducer. Furthermore, ETATRON D.S.
recommends
installing a UPS (genset) to assure continuity, thus ensuring no data are lost. A
system that is set up without following the proper electrical design rules, without an earthing system, with frequent ON/OFF operations,
might directly undermine the duration of the electric circuit.
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