Continuous level measuring system
NB 4000
Technical information / Instruction manual
page G
Operating
conditions
Process overpressure
-0.2 ..+0.2bar (-3.0 ..+3.0psi)
Process temperature
-40°C ..+80°C (-40 ..+176°F)
Ambient temperature
-20°C .. +60°C (-4 .. +140°F)
-40°C .. +60°C (-40 .. +140°F)
CE, FM General Purpose
with internal heater
-40°C .. +60°C (-40 .. +140°F)
ATEX, FM Class II on request possible
Min. powder density
>300 g/l (18 lb/ft
3
)
>20 g/l (1.2 lb/ft
3
) with folding cover
The data is a guideline and is valid for material which has settled after filling.
During the filling the bulk density can change (e. g. for fluidised material).
Minimum time between
measuring starts
measuring height 5m (16ft )-> 3min
measuring height 10m (33ft) -> 6min
measuring height 20m (66ft) -> 12min
measuring height 30m (98ft) -> 18min
Rope/tape operating time
see page G19
Max. permitted tractive
force
ca. 800N
Relative humidity
0-100%, suitable for outdoor
Altitude
max. 2000m (6.562ft)
Technical data
Approvals
Hazardous Locations*
ATEX II 1/2 D (zone 20/21)
FM Class. II, III Div.1 Gr. E-G
General purpose *
CE
EN 61010-1
FM
General purpose
EMC
EN 61326 -A1 (industrial standard)
* Depending on selected version in price list
Colour
Housing
RAL 5010 (gentian blue)
Lid
RAL 9006 (aluminium silver)
Material
See detail specifications on page G4/G5
Measuring range
Max. 15m (50ft) or max. 30m (100ft)
Measuring speed
Sensor weight speed in average: ca. 0,2 m/s (0.6ft/sec)
Weight
With thread: ca. 9kg (20lbs)
With flange: ca. 11kg (24lbs)
Deviation of vertical
mounting
max. 2°
Nivobob
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NB 4000
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