Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
4-18
P124 Channel 2 Scaling Factor
This is for scaling the D802 value into required units (P200). If PV value is the
liquid level, set P124 to the level measurement represented by the 20mA
output from transmitter.
P127 Channel 2 Low Cut-off
Use for forcing D800 to zero while D851 is less than P127
P20x Displayed Measurement Units
P200 for PV (D800), P201 for SV (D801) and P202 for TV (D802)
P210 Optional damping of MCU PV where
D800 = [D800before + ((D800now - D800before)/(1+10 * P210))], at 10 Hz.
For an explanation of P125 and P126, see P115 and P116 in “Profile
Calculations for Contents and Flow Applications“ on page 4-24.
D800 is the PV (Process Variable) value of the 3490 Series Control Unit
D801, D802, D840 and D842 are intermediate results. (They are useful for
trouble-shooting - see “Service and Health Checks“ on page 5-1.)
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