Continuous level measuring system
NB 4000
Technical information / Instruction manual
page G
Timer
Automatic start of measurement with timer function.
The timing interval between two measurements can be adjusted between 0.1h (6 minutes) and 99.9
hours. Position „off“ causes no automatic measurement start.
The timer will be reset after finishing a measurement or after connecting the terminals 24 and 26
(measurement interruption).
If the timer is set, a measurement will start immediately after power on.
For automatic measurement at a predetermined time of day, an external start unit connected to
terminals 24/25/27 is necessary.
To avoid needless wear and tear, the unit should not be started more often than necessary.
Manual motor control
The motor moves the sensor weight upwards while the "ARROW UP" button is beeing pushed.
The motor moves the sensor weight downwards while the "ARROW DOWN" button is beeing
pushed.
Note: If the sensor weight is in the upper stop position or touching the bulk material surface or after
the max. move distance, the motor is automatically stopped.
CAUTION:
Avoid the sensor weight reaching the outlet position of the silo.
Current output check
Enables to check, if the current output is working proper. The current output is forced to 10mA. This
can be evaluated by an external connected multimeter.
Cycles
Indicates how many measurement cycles have been performed up to now.
Cycles reset
Can be done after a rope/tape change, if the service interval message F16 was not yet present. It
sets the internal counter to zero to have the full amount of measurement cycles until the next service
interval message will appear.
Note: After a F16 message is reset with the "START" + "RESET" button, the rope/tape counter is
automatically set to zero.
Run time
Indicates, how long the motor has been runnning up to now (in hours).
Run time reset
Can be done after a motor change, if the service interval message F17 was not yet present. It sets
the internal counter to zero to have the full amount of motor run time until the next service interval
message will appear.
Note: After a F17 message is reset with the "START" + "RESET" button, the motor counter is
automatically set to zero.
Inverted "Air Distance"
Motor value
Internal value only to be used in case of replacement of the motor (see instruction manual of motor
replacement).
Programming
A
ir d
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e A
100%
Enables to set the 100% reference of the 4-20mA output to a level
which is over the level of the sensor weight.
To do this the value must be set to "Yes".
The "Air distance A", which is adjusted in the Quickset Menue (see
page G14), is now over the level of the sensor weight.
The display in the Quickset menue indicates this with a minus as
follows: Air distance: - 1.5m .
Note: In this case the output will never reach 100%.
Nivobob
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NB 4000
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