Example:
The meter is displaying 502 degrees and 696 degrees
(actual temperature)
when the calibrated temperature reference shows that 500 degrees and 700
degrees respectively should be displayed
(desired temperature)
.
First determine the new slope value using the sets of temperature points.
slope =
700 - 500
=
200
= 1.0309
696 - 502
194
Next, determine the new offset value by using either one of the temperature pairs.
offset = 700 - (696 x 1.0309)
offset = 17.5
SET-UP:
“Pro 2” ..... “SLOPE”
-
1.0309
“OFFSEt” -
-17.5
INTEGRATOR/TOTALIZER EXAMPLE
The indicator is employed to indicate average daily
(8 hour)
temperature of a
“Hot Room”
used for storing various ingredients at a large food processing plant.
Ingredients which must be kept at temperatures above 100.0°F are stored in this
room. The desired constant temperature is 110.0°F. However, frequent opening
and closing of the door causes temperature variations. The following
programming steps are performed:
BASIC SET-UP
“Pro 1”.....“rtdtyP”
-
385
“SCALE”
-
F
“dECPNt”
-
0.0
INTEGRATOR/TOTALIZER SET-UP
With an average temperature input which gives a display of 110.0° at the end
of an eight hour time period
(one shift)
, the following formula applies:
S.F.
=
D.T.
x
(
T.B.
)
*
x
D.T.D.P.
I.D.
TIME
I.D.D.P.
S.F. = Programmable Scale Factor
D.T. = Desired Totalizer value for a
fixed time duration
T.B. = Programmable Time Base
T.B. = If Program Select Number Chosen Is:
Enter in Formula
“0” for sec.
1
“1” for min.
60
“2” for hr.
3600
I.D. = Input Display Value
TIME = Actual Time period in seconds
D.T.D.P. = Desired Totalizer Value Decimal Point
Enter in Formula
0
1
0.0
10
0.00
100
0.000
1000
0.0000
10000
I.D.D.P. = Input Display Value Decimal Point
Enter in Formula
0
1
0.0
10
S.F . =
110
x
(
3600**
)
*
x
10
110
28800
10
(8 Hours x 3600)
S.F. = 1x.125
S.F. = .125
“Pro 5”.....“dECPNt”
-
0.0
“tbASE ”
-
2
“SCLFAC”
-
.125
“Lo-cut”
-
0.0
*This value is normally 1, but can be used as a course 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.).
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