Siemens SITRANS LUT400 Operating Instructions Manual page 234

Q= flow
K= constant factor
H= head
Use the exponent specified by the PMD manufacturer, if available, or relevant Open Channel
Monitoring reference material.
Maximum Head (2.15.3.3.)
The maximum level value associated with the PMD and works in conjunction with Maximum
Flow at 20 mA (2.15.3.4.) (Page 232) at 20 mA for Ratiometric calculations. (Defined in Units
(2.1.1.) (Page 168))
Values
This represents the highest head level supported by the Primary Measuring Device (PMD)
and works in conjunction with Maximum Flow at 20 mA (2.15.3.4.) (Page 232) at 20 mA to
define the highest point in the exponential curve. Use it when the PMD requires a maximum
head and flow reference point. Maximum Head must be set for all Absolute and Ratiometic
PMDs.
Maximum Flow at 20 mA (2.15.3.4.)
Note
• The display of the measured value is limited to 7 Characters. Setting a Maximum Flow
value larger than 7 characters will not display correctly.
• If measured value is larger than 7 characters, #### will be displayed. A larger unit
(Flowrate Units (2.15.3.7.) (Page 233)) should be used, or number of decimal points
(Flowrate Decimal (2.15.3.6.) (Page 233)) should be reduced.
The maximum flowrate associated with Maximum Head (2.15.3.3.) (Page 232) shown in
Flowrate Units (2.15.3.7.) (Page 233).
Values
This represents the flow at the highest head level supported by the Primary Measuring
Device (PMD) and works in conjunction with Maximum Head (2.15.3.3.) (Page 232) to define
the highest point in the exponential curve. Use it when the PMD requires a maximum head
and flow reference point. Maximum Flow must be set for all Absolute and Ratiometic PMDs.
232
Range: 0.000 to 60.000
Default: 60.000
Range: 0 to 9999999
Default: 100
Operating Instructions, 07/2019, A5E33329501-AC
SITRANS LUT400