TOTALIZER SET-UP (Cont’d)
D.T.D.P. = Desired Totalizer Decimal Point Enter in Formula
01
0.0 10
0.00 100
0.000 1000
0.0000 10000
I.D.D.P. = Input Display Decimal Point
Enter in Formula
01
0.0 10
0.00 100
0.000 1000
0.0000 10000
S. F
1KW
1.000KW
3600
**
3600
1
1000
*
=´
æ
è
ç
ç
ö
ø
÷
÷
´
S. F.
1
1000
=
S.F. = .001
“Pro 5”..... “dECPNt” - 0
“tbASE” - 2
“SCLFAC” - 0.001
“Lo-cut” - 0.000
The totalizer will totalize up to 999,999 Kilowatt hours.
Alternatively, the totalizer can be scaled to indicate in terms of dollars and
cents of consumed power. If the rate of electricity is 7 cents/kWH then the
following set-ups are made:
S. F
.07 / KW
1.000KW
3600
**
3600
100
1
*
=´
æ
è
ç
ç
ö
ø
÷
÷
´
000
SF .007=
“Pro 5”..... “dECPNt” - 0.00
“tbASE” - 2
“SCLFAC” - 0.007
“Lo-cut” - 0.000
The totalizer will totalize up to 9999.99 dollars in .01 dollar resolution.
*This value is normally 1, but can be used as a coarse scale factor of 60 or 3600.
**Since the time period is in Hrs., the selected T.B. is 3600 (Program Select
Value = 2) which equals per hour (3600 sec.)
LINEARIZER
The linearizer feature is a series of programmable scaling points that are used
to construct linear segments to linearize the input signal. The most common
application would be to interface with square law devices (commonly, flow
transducers). Correction for non-linearity is accomplished by continuing with
scaling points beyond “DSP 2” and “INP 2” in “Pro 1” or “Pro 2”, with “DSP
3”, and “INP 3”, “DSP 4”, and “INP 4”, etc. The unit automatically calculates
the linear segments between the programmed coordinates. This process of
entering linear segments is also known as “curve fitting”. A maximum of nine
segments are available and using nine segments for a square law device would
reduce linearity errors to approximately .35%. No restriction is placed on the
ordering of the scaling points as long as the input signal scaling points are all
increasing or all decreasing. To have one or more points “back-track”, the
input/output (signal/display) relationship would not be a function and would be
undefined in that area. Additionally, consideration should be given to the
location and length of each segment to fully minimize the segment conformity
error over the desired range. A typical curve is shown below using five segments
(six scaling points). Usually it is desirable to use as many segments as possible to
reduce the amount of linearity error.
-25-
LINEARIZING FUNCTION
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