User Manual

Medium density and specific medium heat capacity are constants:
Considerations
 Density (water): 1000 kg/m³ is mapped to constant x (integer).
 Heat capacity (water): 4.2 kJ/ (kg*K) is mapped to constant u (floating point).
Output is calculated based on the following formula for the RMS705B calculator:
Output = Input C * x * u * (input A – input B).
Formula definition
Enter the following in the "Formula" operating line: C*x*u*(A-B)
Constants Enter 1000 in operating line "Constant x".
Enter 4.2 in operating line "Constant u".
Input identifiers Configure the input identifiers as follows:
 Type "C" input on "Input A".
 Type "C" input on "Input B".
 Type "Universal 000.0" input on "Input C".
 Accuracy and resolution of floating point constants is one decimal place, i.e.
4.16 must be entered as 4.2. If greater accuracy is required, enter the constant
increased by factor 10, 100, 1000, and divide the formula by this factor later on.
Notes
 Internal connections (internal analog a) from the calculator output to other
function blocks are passed on as integers within value range -50…9999.
Other possible applications for the calculator are:
 Total solar power
 Volumetric flow
 Energy consumption
 etc.
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Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies Data acquisition 01.04.2010