100/180 MM GRAPHICS RECORDER: USER GUIDE
HA261742
Issue 16 Nov 04
User Guide
Page 66
4.3.3 CHANNEL/ALARM CONFIGURATION (Cont.)
SPANNED
This box, when selected, allows span low and high values to be entered. For example, in an input range of 0 to 600
deg C, it may be that the temperature range between 500 and 600 degrees is of most interest. In such a case, setting
span low to 500 and span high to 600 will cause the recorder to display only that part of the input range, and this will
fill the zone width which is selected next, effectively magnifying the area of interest.
If A/B switching is enabled, a second set of span low and span high values can be entered. 'A' values are used during
normal operation. 'B' values are switched to by job action, as described in
.
ZONE
This allows the portion of the chart which the channel occupies to be defined in terms of percent, where the left edge
of the chart is 0% and the right hand edge is 100%. For example, setting a low value of 50 and a high value of 100
causes the channel trace to be confined to the right hand half of the chart.
If A/B switching is enabled, a second set of zone low and zone high values can be entered. 'A' values are used during
normal operation. 'B' values are switched to by job action, as described in
.
PV FORMAT
This allows the PV value, alarm setpoints, hysteresis values etc. to be displayed as normal numeric values (Numeric)
or in 'Scientific' format (Scientific). When 'Scientific' is selected, values are displayed and entered as a decimal
number between 1 and 10† (the mantissa), followed by a multiplier (the exponent). E.G. to enter a value of
1244.5678, the value entered would be 1.2445678E3, where 3 represents the number of places that the decimal point
must be shifted to the left in order to convert the value to a number between 1 and 10†. To enter a value of
0.0004196, the entry would be 4.196E-4.
† Notes
1.
Strictly this is a number less than 10, as 10 would be 1.0E1.
2.
There must be at least one number after the decimal point.
MAXIMUM DECIMAL DIGITS
This defines the number of decimal places in the process value. Settable between zero and nine. Leading and trailing
zeros are not displayed. Values too long for the available displaying width are truncated as described in
.
COLOUR
Allows the trace colour to be selected from a colour chart. Each of the 56 available colours is displayed with a
number, and it is this number which is entered. The background colour to the selection box changes to the selected
colour.
If A/B switching is enabled, a second colour selection can be entered. Colour 'A' is used during normal operation.
Colour 'B' is switched to by job action, as described in
