SmartBox
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16 / 20 part no. 28 100 57 f
OPERATION
The product requires no operation while it is running.
TROUBLESHOOTING
Measured value too small (I < 3.7 mA probe defective)
Measured value too great for zero point calibration (probe must not be
immersed)
Measured value not plausible. Check menu item “9.Offset probe”
Set height is more than the height of the tank. (incorrect entry menu step 10)
The current measured value is too low as a reference point. The probe must
be submerged. The set height (menu step 10) is too high (the measured
value is too low) Check menu item "9. Offset probe". Otherwise, probe fault.
The current measured value is too low in relation to the set tank height or to
the tank volume. The probe must be submerged.
Measured value (probe current) is too high - check electrical connection and
measuring range of the probe, switch power supply off and on again. Check
menu settings steps 1 to 5. If necessary, Check menu step "9.Offset probe".
Probe current = 0 mA - no signal current. The probe cable is poled wrongly
or interrupted; check cable extension, reconnect if necessary.
Calibration error. Disconnect the display device from the power supply, wait
5 s and then reconnect. Otherwise, probe fault.
The liquid level in the tank is actually too low for an exact
measurement. You can still press [Enter] to confirm and continue.
Checking the probe signal:
Can be checked through menu item “22.Test current”:
At 0 cm fill level approx. 3.7 - 4.3 mA
For 1 m water column approx. 9 - 11 mA (standard probe with measuring range 250 mbar)
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