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OFFSET AND SLOPE DISPLAY TEMPERATURE (Cont’d)
SET-UP:
“Pro 2” ..... “SLOPE” - 1.0638
“OFFSEt” - -5.3
This feature allows the operator to manipulate the displayed temperature
reading. The operator may utilize this feature for example, when switching
thermistor probes, to compensate for differences in thermistor probe
accuracy from one manufacturer to another or to offset the input reading to
match a “Reference” temperature.
The displayed temperature can be offset either positive or negative to the
actual measured temperature. Programming a positivenumber for the offset
value increases the display value. Programming a negative number for the
offset value decreases the display value. For example, if the displayed
temperature is 10° less than the measured temperature, programming a +10
for the offset value will increase the displayed value by 10 throughout the
entire range. If the displayed temperature is 10° higher than the measured
temperature,programminga-10fortheoffsetvaluewilldecreasethedisplay
value by 10 throughout the entire range.
INTEGRATOR/TOTALIZER EXAMPLE
Theindicatorisemployedtoindicateaveragedaily(8hour)temperatureof
a “HotRoom”used forstoring variousingredientsat alarge foodprocessing
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 thedoor causestemperature variations.The
following programming steps are performed:
BASIC SET-UP
“Pro 1”.....“tYPE” - 400
“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 8 hour time period (one shift), the following formula applies:
S.F. =
D.T.
x (
T.B.
)
R
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
01
0.0 10
0.00 100
0.000 1000
0.0000 10000
I.D.D.P. = Input Display Value Decimal Point
Enter in Formula
01
0.0 10
R Thisvalue is normally 1, but can be used as a course scale factor of 60 or
3600.
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