Eurotherm 6100, User Manual

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100/180MM DISTRIBUTED GRAPHIC RECORDER: USER GUIDE
HA029324
Issue 11 Oct 14 Page 109
4.3.11 FUNCTION (Cont.)
MEAN KINETIC TEMPERATURE (Cont.)
CONFIGURABLE ITEMS
Figure 4.3.11g shows the confi gurable items for the MKT function.
Function
MKT
Mean Kinetic Temperature of
Number of samples
Sample interval
604800
Heat of Activation
83.144
Units
Units
Math 2
52
Maths Number 1) Math 1
Value
0.0000 Units
kJ/mole
s
Apply Discard
Figure 4.3.11g MKT function parameters
Mean Kinetic Temperature of
Select the source from which MKT is to be derived. This may be an input channel,
scaled in Kelvins, or it can be a maths channel used to convert a different temperature
scale into Kelvins (see ‘Note’ on previous page).
Number of Samples Enter the number of samples over which the MKT is to be measured.
Sample interval
Enter the time period, in seconds, between samples. At each sample interval, the
maximum and minimum temperatures reached by the input source, since the last sam-
ple, are entered into the equation.
Heat of Activation The default value is an average value based on many common organic reactions. Al-
lows the user to enter an alternative value, if known.
EXAMPLE 1: To Produce a 4-weekly value of MKT, taking samples every day.
Number of samples = 28
Sample interval = No. of seconds in a day = 24 x 60 x 60 = 86,400
EXAMPLE 2: To produce an annual value of MKT, taking samples every week.
Number of sample = 52
Sample interval = No. of seconds in a week = 7 x 24 x 60 x 60 = 604,800
Notes
1 This function produces a ‘rolling’ result. I.E. when the fi nal (Nth) sample has been taken, the
next sample (N + 1)th replaces Sample 1, the (N + 2th) sample replaces Sample 2, and so on.
2 During the fi rst sample, the current minimum and maximum values of temperature are entered
into the equation at the recorder iteration rate (i.e. 8Hz).
3. The number of readings over which the value can be taken is limited by the amount of free RAM
instantaneously available, and is thus dependent on the overall confi guration of the recorder.
An instrument alarm is generated if there is insuffi cient free RAM available - see
section 3.1.3
for details.