OFFSET AND SLOPE DISPLAY TEMPERATURE (Cont’d)
SET-UP:
“Pro 2” ..... “SLOPE” | - | 1.0638 |
“OFFSEt” | - |
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 positive number 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, programming a
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 100.0F 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 | - | 400 |
“Pro 1”.....“tYPE” | ||
“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:
D.T. |
| T.B. |
| D.T.D.P. | ||
S.F. = I.D. | x ( |
| ) |
| x | I.D.D.P. |
TIME |
| |||||
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 |
This value is normally 1, but can be used as a course scale factor of 60 or 3600.