User Guide - Eurotherm Ltda

nanodac RECORDER/CONTROLLER: USER GUIDEDisableif a value of 9,999,999,999,999 is entered into the instrument screen as the Rollover value,it is read back on the instrument panel as 9,999,999,827,968. The inaccuracycaused by the compression amounts to 0.02 parts per million, considerably smallerthan the inaccuracy associated with the input channel which is being used to generatethe input to the totaliser.Allows the user temporarily to suspend totalising action. The totaliser is toggled betweenbeing enabled (cross symbol) and disabled (tick symbol) by means of the scrollkey. The output retains the pre-disabled value until the totaliser is re-enabled, when itresumes from that value, or until the value is changed using the Preset parameter mentionedabove. In the latter event, it will still be necessary to enable the totalisation bysetting the Disable parameter to the cross symbo again.Table 1: PeriodSec Divider Sec Divider Min Divider Hour Divider0.125 1 1 8 1 480 1 28800.25 2 2 16 2 960 2 57600.5 4 5 40 5 2400 6 1728010 80 10 480 12 3456020 160 20 960 24 6912030 240 30 1440The selections in Bold Italic font are those which set the calculation into common timeunits, Second, Minute, Hour and Day(24Hours), and are probably going to be the mostcommonly selected. The other selections may be useful for more unusual applications.Note 1:The formula linking Input1 and PV is:PV Increment each 0.125Sec = Input1/(8*Period(Sec) * UnitsScaler).There is no reason why the Period and UnitsScaler parameters have to be used only inthe way described above, one reflecting the units used by the input channel and theother linked directly to the output units required. There may be application where theymay be used in other ways. Use Table 1 showing the divisor associated with a particularselection for Period in combination with a custom value as the UnitsScaler to generatea custom overall divisor.Page 94HA030554Issue 7 Nov 12