User Guide - Eurotherm Ltda

nanodac RECORDER/CONTROLLER: USER GUIDE4.4.2 Channel Trend configurationThis area allows the configuration of channel colour and span.Channel.1.ColourWheatgermChannel.1.TrendColourSpan LowSpan HighWheatgerm0.00200.00Figure 4.4.2a Channel Trend menuFigure 4.4.2b Colour selectionColourSpan Low/HighAllows a colour to be specified for the channel. The Scroll key is used to enter the colourswatch page. The up and down arrows are used to scroll through the available colours,with each colour being enlarged for as long as it is ‘selected’. Once the requiredcolour, is reached, the scroll key is used again to return to the Trend Configuration.Span low and high values.Note: Trend colours and alarm settings for secondary inputs are configured in the maths channelsto which they are wired.SPAN EXAMPLEIn an input range of 0 to 600 degrees C, the temperature range between 500 and 600 degrees is of mostinterest. In such a case, Span Low is set to 500 and Span High to 600 so that the recorder trends only therequired part of the temperature range, effectively magnifying the area of interest.Note: Trending is restricted to the PV range (Span High - Span Low), but the instrument can displayvalues outside this range.CHANNEL CONFIGURATION EXAMPLEA type J thermocouple is used to measure a temperature range of 100 to 200 degrees Celsius. This thermocoupleoutput is transmitted to the recorder by a 4 to 20mA transmitter, for display as a value between 0and 100%.In Channel.Main, set the following for the relevant channel:Type= mAUnits = %Input Low = 4.00Input high = 20.00Shunt = 250 OhmsLin Type = Type JRange Low = 100.00Range High = 200.00Range Units = °CScale Low = 0Scale High = 100Other items may be left at their defaults.Page 84HA030554Issue 7 Nov 12