Nivobob
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NB 3000
gi130109
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Continuous level measuring system
NB 3000
Technical information / Instruction manual
page G
Signal overview
Diagnostics signals
Failure
Result is a non valid measurement.
Red LED is on. Relay 3 indicates Failure.
The signal indicates critical situations. Evaluation can help to avoid losing the sensor weight inside the silo.
If Failure is indicated, the unit must be checked on site.
Failure codes description see page G39.
Maintenance
Result is an indication for the user with still valid measurement.
Red LED is blinking. Relay 4 indicates Maintenance (programmable).
The signal enables a preventive maintenance. Evaluating can help to avoid loosing the sensor weight inside
the silo.
If Maintenance is indicated, the measurement process can be continued.
Maintenance codes description see page G37.
Relay 4 - set to "Upper stop postition"
The signal allows the user to determine whether the measurement has come to its end. In this case the
sensor weight is in its upper stop position, relay contacts are closed.
Relay 4 - set to "Maintenance"
The relay indicates a necessary maintenance (see also programming on page 28 and diagnostics
"Maintenance" on page 37)
Signal output:
Electronic counting pulse
Counting pulse
(terminal 3 and 4):
The electronic counting pulse enables a high amount of pulses to receive a high resolution of the
measurement signal.
Note:
The reset pulse is done with relay 2.
LED status
LED
Status
LEDs next to display
Green is on
Power On
Red is on
Failure
Red is blinking
Maintenance
Yellow in on
Full detector input present
LEDs next to relais terminals
Yellow is on
Relay is energised
Counting pulse
programmed to:
ON
OFF
2,5cm (1/10ft) / pulse
25ms
25..70ms
1cm (1/20ft) / pulse
10ms
10..30ms
Start
Reset
Counting
Timing
