Nivobob
®
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NB 3000
gi130109
41
Continuous level measuring system
NB 3000
Technical information / Instruction manual
page G
Notes for use in Hazardous Locations
Maximum Surface Temperature
The temperature marking on the name plate
refers to the instruction manual.
On the following table the relevant temperature ratings are shown.
The maximum surface temperature and the temperature class refer to the warmest area outside on the unit which can occur in failure case
(according to EX definition).
Static discharge of the material surface
It must be ensured that no static discharge can occur when the grounded metal sensor weight or rope /tape touches the surface of
the bulk material. If this can not be ensured, the safe use of the unit is NOT guaranteed. The responsibility for this rests with the user.
In case of inclarity an assessment from a notified body is necessary.
From the manufacturer side a version with a plastic sensor weight and additional plastic rope insulation part is available on request.
This keeps a 500mm (19.7") distance from the material surface to the grounded rope/tape.
Max.
ambient
temperature
Max.
process
temperature
Max.
surface
temperature
60°C (140°F)
80°C (176°F)
130°C (266°F)
40°C (104°F)
90°C (194°F)
130°C (266°F)
100°C (212°F)
130°C (266°F)
110°C (230°F)
130°C (266°F)
120°C (248°F)
130°C (266°F)
130°C (266°F)
130°C (266°F)
135°C (275°F)
135°C (275°F)
140°C (284°F)
140°C (284°F)
150°C (302°F)
150°C (302°F)
Ambient
Process
Max.
ambient
temperature
Max.
process
temperature
Max.
surface
temperature
60°C (140°F)
80°C (176°F)
130°C (266°F)
130°C (266°F)
130°C (266°F)
135°C (275°F)
135°C (275°F)
140°C (284°F)
140°C (284°F)
150°C (302°F)
150°C (302°F)
160°C (320°F)
160°C (320°F)
165°C (329°F)
165°C (329°F)
170°C (338°F)
170°C (338°F)
180°C (356°F)
180°C (356°F)
190°C (374°F)
190°C (374°F)
200°C (392°F)
200°C (392°F)
210°C (410°F)
210°C (410°F)
215°C (419°F)
215°C (419°F)
220°C (428°F)
220°C (428°F)
230°C (446°F) 230°C (446°F)
240°C (464°F)
240°C (464°F)
250°C (482°F)
250°C (482°F)
Ambient
Process
Version for
process temperature
max. 80°C (176°F) /
max. 150°C (302°F)
Version for
process temperature
max. 250°C (482°F)