Honeywell EXCEL 5000 User Manual

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Honeywell EXCEL 5000 User Manual Manual pdf 76 page image

ALPHABETIC REFERENCE EXCEL CARE CONTROL ICONS74-5577–33 (US) 78EN2B-0184 GE51 R0518 (Europe)FLOW CALCULATIONFunction Output a flow rate calculated from a flow sensor or transmitter (air, gas, water flow,etc).I/O Dialog BoxInput The input, In, comes from a flow sensor (air, gas, water, etc). The input can be directreading (that is, in actual engineering units [PSI, INW, etc]) or generic (0-100 PCT).For inputs that read in actual engineering units, P2 and P3 must be equal (OK toleave default values). For generic inputs, set P2 equal to the actual sensor range(that is, the value in engineering units that produces 100 percent at the input).The input can be linear or nonlinear. If nonlinear, FLOW linearizes it by taking thesquare root. The square root function parameters are optimized to produce accurateresults for input values between 0.003 and 5000.0. For linear sensors, the squareroot can be disabled.Output Calculated flow rate (CFM, GPM, etc).You can set a parameter value (internal parameters dialog box) so that the output isset to zero if the flow calculations fall below this value. You can use this feature toproduce a zero output when the associated system is off.Internal ParametersP1=1 to enable square root, 0 to disable.