Helios Large Display Dual Analog Input Rate/Totalizer Instruction Manual
PD2-6262
54
Programmable Exponent Linearization (
Prog E
)
The programmable exponent function is used to calculate open-channel flow measured with a level
transmitter in weirs and flumes. The flow rate is proportional to the head height. Scale the meter so that
the low input signal (e.g. 4 mA) is equal to zero flow and the high input signal (e.g. 20 mA) is equal to the
maximum flow. This method works well for all weirs and flumes that have a simple exponent in the flow
calculation formula. For weirs and flumes with complex exponents it is necessary to use a strapping table
and the 32-point linearization of the meter.
Multi-Point Linearization (
Linear
)
Meters are set up at the factory for linear function with 2-point linearization. Up to 32 linearization points
can be selected for each channel under the linear function. The multi-point linearization can be used to
linearize the display for non-linear signals such as those from level transmitters used to measure volume
in odd-shaped tanks or to convert level to flow using weirs and flumes with complex exponent.
Note: After Scale is displayed continue pressing the Enter button until the meter completes the scaling of the input
and display values.
Math Function (
math
)
The
Math
menu is used to select the math function that will determine the channel C value. These math
functions are a combination of input channels A and B, and will display when channel C is selected in the
Display
menu. The following math functions are available.]
Sunm
Sum
Channel C = (A+B+P)*F
Dif
Difference
Channel C = (A-B+P)*F
difabs
Absolute difference
Channel C = ((Absolute value of (A-B))+P)*F
Avg
Average
Channel C = (((A+B)/2)+P)*F
nmulti
Multiplication
Channel C = ((A*B)+P)*F
Divide
Divide
Channel C = ((A/B)+P)*F
Hi-ab
Max of A or B
C = ((High value of channel A or B)+P)*F
Lo-ab
Min of A or B
C = ((Low value of channel A or B)+P)*F
Drauw
Draw
Channel C = ((A/B)-1)*F
uwAvg
Weighted avg.
Channel C = ((B-A)*F)+A
ratio
Ratio
Channel C = (A/B)*F
Concen
Concentration
Channel C = (A/(A+B))*F
Sunm t
Sum total
C = (tA+tB+P)*F
Sunmgt
Sum grand total
C = (GtA+GtB+P)*F
Dif t
Difference of total
C = (tA-tB+P)*F
Dif gt
Diff. of grand total
C = (GtA-GtB+P)*F
Tratio
Total ratio
C = (tA/tB)*F
T pct
Total percent
C = (tA/(tA+tB))*100
