100/180 mm PAPERLESS GRAPHIC RECORDER: USER GUIDE
HA028910
Issue 13 Sep 16
User Guide
Page 110
4.3.11 FUNCTION (Cont.)
Copy
Copies the value of a selected point to the maths channel being confi gured. Allows
extra alarms to be set up for the copied point.
Polynomial
Provides a polynomial curve fi t for the specifi ed point, using up to 8 orders,
Fvalue
This function calculates ‘equivalent time at sterilizing temperature’ for temperatures
above and below the sterilizing temperature. FO (dry) and FH (steam) sterilizing
calculations can be carried out, by entering the correct constant. The value can be
held, using a ‘Disable’ job or set to zero (prior to the next run) using a ‘reset’ job. See
section 4.7
for a description of jobs. The function value is retained during power off.
Switch
Allows two channels (‘A’ and ‘B’) to be selected as alternative sources for the selected
maths channel to copy. The maths channel copies source ‘A’, unless a ‘Switch to B’
job is active on the maths channel. See section 4.7 for Job descriptions.
Linear Mass Flow
This function calculates mass fl ow from linear-type transducer outputs.
Root Mass Flow
This function calculates mass fl ow from square root-type transducer outputs.
Rolling Average
This takes the average value of a single channel over a specifi ed number of readings
taken at a specifi ed interval. The function value is retained during power off.
MKT
Mean Kinetic Temperature. A single calculation to simulate non-isothermal effects of
variations in storage temperature.
10 to the power
Output = 10 raised to the power of the selected input value.
Group Latched Minimum
Outputs the minimum value reached by any of the points in a selected source group
since last reset. The function ignores points that are not producing valid PV. A dis-
able job stops the function reading its input. A reset job sets the function to the
current minimum value within the group. Note that for proper operation, the maths
function must be in a group which is not the source group. If this is not the case, it
will always see itself as the lowest valued point in the group, and Reset operations
will have no useful effect.
Group Latched Maximum
As for Group Latched Minimum, above, but outputs the maximum value of the
source group.
Sample and Hold This function is initiated by a trigger job. At trigger time, the selected point value
is sampled, and its value at trigger time is output continuously by this function. On
reset, the PV becomes ‘No data’.
Square Root
Outputs the square root of the value of the selected point.
High Select
Allows two points to be selected as inputs. The output of the function is the value of
that input point which currently has the higher value.
Low Select
Allows two points to be selected as inputs. The output of the function is the value of
that input point which currently has the lower value.
Saturated Steam Mass Flow
Calculates mass fl ow in kg/s for saturated steam, using either the steam temperature
(Celsius) or pressure (MPa) as appropriate to the process.
Saturated Steam Heat Flow
Calculates the energy fl ow in kJ/s for saturated steam, using either the steam tem-
perature (Celsius) or pressure (MPa) as appropriate to the process.
Saturated Steam Heat Consumed
Calculates the heat consumed in kJ/s for saturated steam, using the inlet steam tem-
perature (Celsius) or pressure (MPa) (as appropriate to the process), and the return
(condensate) temperature.
Group MKT
Calculates Mean Kinetic Temperature of a specifi ed group of channels
