English (GB)
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9.4.6 Level indicators
For illustrations and description of the tank level indicators,
please see section 5.3 Tank levels.
Status of level indicators
The display indicates the status of the level indicators.
Reaction tank
"main menu > function tests >level indicators > reaction tank"
While the production process is running, the levels K1 to K4 must
be marked in succession.
Internal batch tank
"main menu > function tests >level indicators > int. batch tank"
If the internal batch tank is empty, the filling level K5 is marked.
If the batch tank is filled, the level is between K5 and K6, and no
filling level is marked. If the tank is overfull, the filling level K6 is
marked (alarm).
External batch tank
"main menu > function tests >level indicators > ext. batch tank"
Suction lances
HCl suction lance
"main menu > function tests >level indicators > suction lances >
HCl"
NaClO
2
suction lance
"main menu > function tests > level indicators > suction lances >
NaClO2"
Level status
To test the level indicator, move the suction lance up and down
and observe the marks at the display.
9.5 Calibration faults
9.5.1 Slope or asymmetry error
If the slope or asymmetry is outside the norm, the following error
messages are displayed: "slope error" or "error asym. pot.".
This is caused by an old electrode or an old buffer solution.
1. Press [Esc] to terminate calibration.
2. Check the expiry date.
3. Replace the electrode or replace the buffer solution.
4. Repeat the calibration.
9.5.2 Unstable measuring signal
If the electrode does not send a stable measuring signal to the
control unit within 120 seconds, the following error message is
displayed: "calibration time exceeded".
This is caused by an old electrode.
1. Press [Esc] to terminate the calibration.
2. Replace the electrode.
3. Repeat the calibration.
Display Status of level indicators
"X" Level at switch
"-" Level above or below switch
"?" Invalid level indicator
reaction tank
K4:.................................... -
K3:................................... x
K2:................................... -
K1:.................................... -
int. batch tank
K6:................................... -
K5:................................... -
ext. batch tank
K13:.................................. -
K12:.................................. x
K11:.................................. x
Display Status of level indicators
"X" Level above switch
"-" Level below switch
"?" Invalid level indicator
Warning
Before starting work, put on protective clothing:
gloves, face mask, protective apron.
Risk of burns from drips when removing the suction
lance from the chemical container.
Do not allow drips to fall on the skin, clothing, shoes
or ground.
Rinse away any drips on the container or in the
collecting tray with water immediately.
Risk of explosion when mixing NaClO
2
, and HCl.
Risk of poisoning from ClO
2
gas.
HCl
K7:.................................... x
K8:.................................... -
NaClO2
K9:................................... x
K10:................................. -
K7 / K8 K9 / K10 Level status
"x" "-" Full
"-" "-" Low-level
"-" "X" Empty
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