KROHNE BM 70 M - Manual (Page 41)

BM 70 M 41
Function I (Fct 3.3.1) CONVERSION
Range I (Fct. 3.3.2) 4 - 20 mA
Scaling 4 mA (Fct. 3.3.3) 0.00 m
3
, corresponds to 4 mA
Current output I
Scaling 20 mA (Fct. 3.3.4) 16.80 m 3 , corresponds to
20 mA
Function S (Fct. 3.6.1) LEVEL
Type S (Fct. 3.6.2) LOW (=if level drops below
threshold)
Threshold(Fct. 3.6.3) 5.00 m
Switching output
Hysteresis (Fct. 3.6.4) 0.10 m
Function, display (Fct. 3.2.1) CONVERSION Display
Unit, conversion (Fct. 3.2.2) m
3
(cubic meter)
8.6 Description of functions
8.6.1 Choice of units
Level/distance units
Select under Fct. 3.1.1 TANKHEIGHT
•
m
• cm
• mm
• inch
• Ft
The unit selected here is also valid for the following functions:
Block distance
Fct. 3.1.2
Antenna extension Fct. 3.1.4
Scaling 4 mA value, current output Fct. 3.3.3
Scaling 20 mA value, current output Fct. 3.3.4
Range for partial tank bottom tracing Fct. 3.5.2
Threshold (limit value), switching output Fct. 3.6.3
Hysteresis, switching output Fct. 3.6.4
Tracking speed, Fct. 3.5.4
(in m/min when Fct.3.1.1 = m, cm or mm
or in ft/min when Fct.3.1.1 = inch or ft)
The Fct. 3.2.2 (length unit for display) can be set independently of the unit selected under Fct.
3.1.1.
Conversion units
By conversion is meant the transposition of an arbitrary level value into a "conversion value"
(usually volume), so as, for example, to realise a non-linear function as a factor of the level.
Options under Fct. 3.2.3 UNIT.CONV.
• m³
• l ( = litres)
•
US Gal
• GB Gal (Gal = gallons)
•
Ft3
• bbl (petroleum barrels)