User Guide - Eurotherm Ltda

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nanodac RECORDER/CONTROLLER: USER GUIDE4.1.9 Input adjustNotes1. Input adjust cannot be applied to input channels with input type of ‘Digital’, ‘Test’ or ‘Off’.2. Input adjustments can be carried out only by users logged in as ‘Engineer’ (see Section 3.3.8).3. The instrument must be powered for a sufficient time (e.g. 30 minutes) for it to reach thermal equilibriumbefore an input adjust is performed.This facility allows the user to compensate for tolerance errors etc. The technique used is to select thosechannels to which adjust is to be applied, then for each channel to:a apply a known low level signal (at or close to the low input range value) to the relevant input. When therecorder reading is steady, press ‘Apply’.b. apply a known high level signal (at, or close to, the high input range value) to the relevant input. Whenthe recorder reading is steady, press ‘Apply’.Figure 4.1.9a shows a typical display when ‘Input adjust’ is selected from the Instrument menu, and Applyadjust has been selected. As can be seen, channel 3 has previously been adjusted.Instrument.Input AdjustChannel 1Channel 2Channel 3Channel 4Apply AdjustRemove AdjustUnadjustedUnadjustedAdjustedUnadjustedNoNoFigure 4.1.9a Input adjust top level displayChannel 1 to 4Apply AdjustRemove AdjustAbortShows the adjust status of each channelSelecting ‘Yes’ initiates the adjustment procedure described below.Selecting ‘Yes’ initiates the adjustment removal procedure described below.Allows the user to abandon input adjustment at any point in the procedure.ADJUSTMENT PROCEDURE1. As shown in figure 4.1.9b, highlight the ‘Apply Adjust’ field, and operate the scroll key to enter editmode. Use the up or down arrow key to select ‘Yes’. Use the scroll button to change Channel 1 ‘cross’to a ‘tick’ (check mark). Similarly select any other channels which require adjustment.Instrument.Input AdjustInstrument.Input AdjustChannel 1UnadjustedChannel 1Channel 2UnadjustedChannel 2Channel 3AdjustedChannel 3Channel 4UnadjustedChannel 4Apply AdjustYesStart IP AdjustNoRemove AdjustNoAbortNoFigure 4.1.9b Channel adjustment procedure (1)Page 68HA030554Issue 7 Nov 12
nanodac RECORDER/CONTROLLER: USER GUIDE4.1.9 Input Adjust (Cont.)ADJUSTMENT PROCEDURE (Cont.)2. Highlight the ‘Start IP ‘Adjust’ field and use the scroll and up/down arrow to select ‘Yes’. Use the scrollkey again to enter the low value adjust page.3. Apply the known low value and wait for the value to stabilise. Enter the ‘Low Target Value’ (the valuethat the recorder is to read for the applied input). When all is steady, use the scroll and up/down arrowto set the ‘Confirm Low’ field to ‘Yes’, then operate the scroll button again.Instrument.Input AdjustInstrument.Input AdjustChannel 1Low Target Value0.00Channel 2Confirm LowYesChannel 3Channel 1 Value0.21Channel 4AbortNoStart IP AdjustYesAbortNoFigure 4.1.9c Channel adjustment procedure (2)4. The display changes to the high value adjust page.5. Apply the known high value and wait for the value to stabilise. Enter the High Target Value (the valuethat the recorder is to read for the applied input). When all is steady, set ‘Confirm High’ to ‘Yes’.Instrument.Input AdjustInstrument.Input AdjustHigh Target Value10.00Channel 1AdjustedConfirm HighYesChannel 2UnadjustedChannel 1 Value9.79Channel 3AdjustedAbortNoChannel 4UnadjustedApply AdjustYesRemove AdjustNoFigure 4.1.9d Channel adjustment procedure (3)REMOVAL PROCEDURE1. Set ‘Remove Adjust’ to ‘Yes’ and operate the scroll button.2. Use the scroll and up/down arrow buttons to change the required channel icons from crosses to ticks.3. Select Remove IP Adjust to ‘Yes’ and operate the scroll key. The adjustment is removed from allselected channels without further confirmation.Instrument.Input AdjustInstrument.Input AdjustChannel 1AdjustedChannel 1Channel 2UnadjustedChannel 2Channel 3UnadjustedChannel 3Channel 4UnadjustedChannel 4Apply AdjustYesRemove IP AdjustYesRemove AdjustNoAbortNoFigure 4.1.9e Channel adjustment removalHA030554Issue 7 Nov 12Page 69
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User Guide - Eurotherm Ltda

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