Y
values to be entered into the lineariser table must be either calculated or measured via a live input.
Refer to the “Example” later in this chapter for an example of creating a lineariser table using live inputs.
tAbL
(lineariser on or off)
Allows the lineariser to be switched on (
on
) or off (
OFF
). If it is switched off then none of the other
lineariser functions will be seen on the display and the instrument will either operate as a linear display using
the
CAL1
&
CAL2
or
USER En4
&
USER En20
scaling values or as a square root law display if the
SQrt
function is set to
on
.
tAbL StOP
(mode of operation at points outside the table range)
This function sets the mode in which the instrument will behave when a value is input which is higher
than the largest value entered in the table or lower than the smallest value entered in the table. Refer to the
graph above.
If set to
on
then the display value will remain equal to the nearest table entry value. For example if
the lowest table entry is made at 8mA and the display indicates
500
at this value then any input lower than
8mA will also cause the display to indicate
500
.
If set to
OFF
then the display value will continue to change when an input outside the table limits in
encountered. The instrument will extrapolate the reading using the slope of the previous pair of points.
SCLE tbIE
(table rounding value)
This function allows a rounding value to be set for
Y
entries. Options provided are 1, 2, 5, 10, 20, 25,
50, 100, 250, 500 or 1000 . For example if the rounding value is set to 25 then the
Y
entries will jump in steps
of 25 i.e. 0, 25, 50, 75 etc. (or 0.00, 0.25 etc. depending on decimal place setting). This rounding factor is
useful in that it allows the speeding up of entries into the table, it does not cause the final display value to jump
in steps. Use the
drnd
function if you wish to cause the final display value to also jump in these steps.
tAbL PntS
(number of table points)
Displays and sets the number of points in the lineariser table. Select the number you require and
enter that number of points. If you wish to increase or decrease the number of points then the
tAbL PntS
value can be changed at a later stage.
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LD4LNMAN-1.0-1
P2 P3
P4
P5
P1
Y1
Y2
Y3
Y4
Y5
1
1
2
2
Arrows labelled "1" show the effect of
function =
Arrows labelled "2" show the effect of
function =
tAbL StOP
on
tAbL StOP
OFF
Display
value
Input
Simple 5 point lineariser graph
