Seko PH - Dosing Operation Examples; Troubleshooting; Troubleshooting Common Issues

0000136965
Rev. 1.1
8
3.5__Dosing and adjustment examples
Dosing Operation/Pause (ON
-
OFF)
The instrument permits automatic control and modification of
the chemical measurement through Set Point 1, adjusting
dosing by m
eans of On
-
Off Relay 1.
The dosing example on the side can be set using the following
parameters:

Set Point 1 = 7.20 pH

Type of Dosing = Alkaline

Hysteresis = 0.40
The instrument will begin dosing for values below 7.20 and
will stop dosing when above 7.60.
If Acid is set for Type of Dosing, dosing will be the exact opposite: dosing will
begin above 7.20 and will stop below 6.80 pH. The instrument permits two independent dosings by setting Set
Point 2 associated with Relay 2.
Dosing with delays
The instr
ument permits dosing start and end delays. The dosing
example on the side can be set using the following parameters:

Delay Start (D
-
1) = 5 minutes

Delay End (D
-
2) = 5 minutes
This function is available for all of the previously described
settings: ON
-
OFF,
Timed, Prop.
Note: The variables shown above are independently available for
Set Point 1 and Set Point 2.
4
TROUBLESHOOTING

The device does not come on…
o
Make sure that the power cables are correctly connected
o
Check whether the power supply is pre
sent

The display does not light up…
o
Regulate the display contrast

The chemical measurement function does not work…
o
Check the probe connection
o
Calibrate as instructed in the manual
o
Replace the probe

The mA output does not change…
o
Check the cable connection
o
Use the “Manual Control” function in the main menu to check whether the output produces the
desired effect.
o
Check the electrical characteristics of the remote device (maximum load: 500 ohm).

The relays do not work…
o
Check whether the instrument is correctly
powered
o
Check the settings in the main menu
Note:
If the anomaly persists, please contact the supplier.