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43-TV-25-35 GLO Iss.4 Dec 06 UK
A5E01001767-04
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Figure 4.2 Effects of Damping and Rolling Average example
Input signal
(Pen 67)
Note: the Damping (Pen 10) has been offset for this
example to be able to see the damping effect clearly
• Linearisation Tables (Ohms, Volts and Amps only) - Select a table from the drop down
See "Linearisation Tables" on page 59.
list if required.
• Use Pen Scale - Toggle On and Off, this is enabled by default. Analogue # defaults to
the corresponding Pen #, eg. A1 will default to Pen 1. If you change A1 to display
another pen scale eg.Pen 3, you must go into Pen 3 and change the maths to A1. This
will ensure that Pen Scale 3 will display A1 input. With this enabled the Engineering
zero and span is the same as the pen scale. Disable this and the Engineering zero and
span will not reflect the pen scale. When disabled, see Eng. Span % Eng Zero.
This is not available when using Linearisation Tables.
• Units - (Ohms, Volts and Amps only). This is the Units of Measurement for each input.
Select and enter a value. Max 13 characters. For Thermocouple and Resistance Ther-
"Localisation" on page 91
mometer units, see
• Label - Select and enter a identification label for the input. Select and enter a label. Max
15 characters.
• SQRT Extract - (Ohms, Volts and Amps only). Toggle On and Off. The Square root
extraction in the analogue input is used to linearise certain sensors that have a non lin-
ear output - for example in the calculation of flow. So when you check the Square root
extraction in the Analogue input section it carries out the following calculation. It ratios
the analogue input range that you set, to 0 to 1. So any sensor input is represented by
a number from 0 to 1. We then take the square root. We then re ratio the result back to
the user set range.
• Sensor Comp - Sensor Compensation may be required to improve accuracy on a sub
range. This is an adjustment to the value of the signal input on each channel, based on
the Engineering units settings. See
Rolling Average of input signal
(Pen 11)
Damping on input signal
(Pen 10)
"Sensor Compensation" on page 261
.
53
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