Endress+Hauser Proline Cubemass 300, Description Of Device Parameters

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Description of device parameters Proline Cubemass 300 Modbus RS485
92 Hauser
Ref. temperature 
Navigation  Expert → Sensor → Calculated value → Corr. vol.flow. → Ref. temperature (1816)
Prerequisite The Calc ref density option is selected in the Corr. vol.flow. parameter (→  90).
Description Use this function to enter a reference temperature for calculating the reference density.
User entry –273.15 to 99 999 °C
Factory setting Country-specific:
• +20 °C
• +68 °F
Additional information Dependency
The unit is taken from the Temperature unit parameter (→  67)
Reference density calculation
ρ
n
ρ α β (1 + +
⋅ ∆
t
⋅ ⋅ ∆
t )
2
=
A0023403
• ρ
N
: reference density
• ρ: fluid density currently measured
• t: fluid temperature currently measured
• t
N
: reference temperature at which the reference density is calculated (e.g. 20 °C)
• ∆t: t - t
N
• α: linear expansion coefficient of the fluid, unit = [1/K]; K = Kelvin
• β: square expansion coefficient of the fluid, unit = [1/K 2 ]
Linear exp coeff 
Navigation  Expert → Sensor → Calculated value → Corr. vol.flow. → Linear exp coeff (1817)
Prerequisite The Calc ref density option is selected in the Corr. vol.flow. parameter (→  90)
parameter.
Description Use this function to enter a linear, fluid-specific expansion coefficient for calculating the
reference density.
User entry Signed floating-point number
Factory setting 0.0 1/K