User Guide - Eurotherm Ltda

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nanodac RECORDER/CONTROLLER: USER GUIDE4.4.1 Channel MainThis section describes all possible menu items, but it should be noted that some items are context dependent(e.g. Cold Junction settings appear only for Type = ‘Thermocouple’).Channels one to four in the configuration relate to An In 1 (terminals 1I, 1+ and 1-) to An In 4 (terminals 4I,4+ and 4-) respectively - see figure 2.2.Channel.1.MainDescriptorTypePVStatusIP Adjust StateResolutionUnitsTest SignalInput LowInput HighShuntLin TypeRange LowRange HighRange UnitsScale LowScale HighOffsetCJ TypeExt CJ TempFilterSensor Break TypeFault ResponseSensor Break ValMeasured ValueInternal CJ TempChannel 1Thermocouple197.35GoodAdjusted2°CTriangle 5 Hr0102.49Type K0.00100.00°C0.00100.000.000External0.001.0 secBreak HighDrive Low1%0.235.1Figure 4.4.1a Channel main menu (expanded)Note: For the sake of completeness, the figure above shows all possible fields, even though manyare mutually exclusive. For example, ‘Test signal’ appears only when ‘Test’ is selected as Type. Itwould never appear when Type = thermocouple (as shown). Similarly, ‘Shunt’ would appear only forType = mA.Page 80HA030554Issue 7 Nov 12
nanodac RECORDER/CONTROLLER: USER GUIDE4.4.1 Channel Main (Cont.)Descriptor Allows a (20 character max.) descriptor to be entered for the channel. Some thoughtshould be given to ensure that the descriptor is meaningful because in some displayscreens it is truncated. For example, ‘Furnace 1 area 1’ and ‘Furnace 1 area 2’ mightboth appear as ‘Furnace 1 a’ and thus be indistinguishable from one another, except inbackground colour.PVRead only. Displays the current value of the channel.StatusRead only. Shows the channel status as one of: ‘Good’, ‘Channel Off’, ‘Over range’, ‘Underrange’, ‘HW error’, ‘Ranging’, ‘HW (capability) exceeded’.PV2Read only. For dual inputs only, displays the current value of the secondary input.Status2Read only. For dual inputs only, shows the secondary input status (as ‘Status’ above).IP Adjust State Appears only for channels which have been included in the ‘Adjust Input’ proceduredescribed in Section 4.1.9.IP Adjust State2 As ‘IP Adjust State’, above but for secondary channels.Resolution Allows the number of decimal places to be defined for the channel. Valid entries arezero to nine.UnitsAllows a units string of up to five characters to be entered.TypeAllows the user to select an input type for the channel. Available selections are: ‘Off’,‘Thermocouple’, ‘mV’, ‘V’, ‘mA’, ‘RTD’, ‘Digital’, ‘Test’ or ‘Ohms’. If the Dual Input optionis fitted, Dual mV, Dual mA, Dual T/C (if enabled) are also available.Note : If Dual T/C is selected then it is essential that the secondary T/C input is field calibrated usingthe Input Adjust procedure (Section 4.1.9)Test signal Appears only if ‘Test’ is selected as ‘Type’. Allows either a sinusoidal or a triangularwaveform to be selected at one of a number of cycle times between 40 seconds andfive hours.Input Low* For Type = mV, Dual mV, V, mA, Dual mA or Ohms, the lowest value of the applied signalin electrical units.Input High* As ‘Input Low’, but the highest value of the applied signal in electrical units.Shunt value For mA and Dual mA input types only, this allows the value of the shunt resistor (inOhms) to be entered. The recorder does not validate this value - it is up to the user toensure that the value entered here matches that of the shunt resistor(s) fitted. For DualmA input type, both primary and secondary inputs must have independent shunts eachof the same value.Lin typeLinear, Square root, x3/2, x5/2, User Lin.Thermocouple types (alphabetical order): B, C, D, E, G2, J, K, L, N, R, S, T, U, NiMo/NiCo, Platinel, Ni/MiMo, Pt20%Rh/Pt40%Rh.User 1 to User 4Resistance thermometer types: Cu10, Pt100, Pt100A, JPT100, Ni100, Ni120, Cu53.See Appendix A for input ranges, accuracies etc. associated with the above thermocoupleand RTD types. See Section 4.14 for details of user linearisations.Range Low* For thermocouples, RTDs, User linearisations and retransmitted signals only, the lowestvalue of the required linearisation range.Range High* For thermocouples, RTDs, User linearisations and retransmitted signals only, the highestvalue of the required linearisation range.Range Units For thermocouples only and RTDs, Select °C, °F or K.Scale Low/High Maps the process value to (Scale High - Scale Low). For example, an input of 4 to 20mAmay be scaled as 0 to 100% by setting Scale low to 0 and Scale High to 100.Scale Low2/High2 As ‘Scale Low/High but for the secondary input (PV2).OffsetAllows a fixed value to be added to or subtracted from the process variable.*Note: See Section 4.14 for details of the configuration of Range High/Low and Input High/Lowwhen ‘Type’ = User 1 to User 4.HA030554Issue 7 Nov 12Page 81
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User Guide - Eurotherm Ltda

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