User Guide - Eurotherm Ltda

nanodac RECORDER/CONTROLLER: USER GUIDE3.4.10 Steriliser Display Mode (Cont.)DISPLAYED INFORMATIONCycleA five-digit counter to indicate the total number of cycles started.StatusWait start: The initial state at power up. This status remains until the first cycle is initiatedWaiting: Waiting for input 1 to reach its target setpoint. The cycle then enters Equilibration.Equilibration: Currently in the equilibration period, during which the cycle waits untilall inputs have reached sterilisation conditions.Sterilising: Currently in the decontamination phasePassed: The cycle has completed successfullyFailed: The cycle has failed either through one or more inputs becoming invalid, or becausethe ‘Start’ signal was removed.Test cycle: A test cycle is in progressRemaining The sterilising time remaining for the current cycle. Display field is replaced by ‘TargetTime’ (below) when the cycle is not running.Target time The intended sterilisation time. This can be configured by operating the scroll buttontwice (once to highlight the field, and again to enter edit mode), and then using the upand/or down arrows to edit the time. Use the Scroll button again to quit edit mode, andthe page key to ‘unhighlight’ the field.Replaced by ‘Remaining’ (above) when the cycle is running.Equilibration The equilibration time period for the current cycleSterilising The time for which the load has currently been at sterilisation conditionsTotal Cycle The elapsed time since the initiation of the current cycle. This time increments from thetime the cycle is triggered until the time the trigger is removed.Input values Temperature are required in °C; pressure inputs in mBar. If necessary, maths channelsand user values can be used to convert from other units (see ‘Note’ overleaf).STERILISING CYCLE DIAGRAMFigure 3.4.10b, below, shows a steriliser cycle in diagrammatic form.Wait StartWaitingEquilibrationSterilisationOverheatBand High(Note 3)Target setpointCycle startEquilibration starts wheninput 1 reaches setpointSterilisation starts whenslowest input reaches setpointBand Low(Note 3)Figure 3.4.10b Steriliser cycleNotes:1. For temperature inputs in most applications, the Setpoint value is the same as the Band Low valueFor the sake of clarity, this is not as shown in the figure above.2. For the sake of clarity all four inputs in the figure above are shown with the same Band High, BandLow and Setpoint value. This would not be unusual for temperature units, but the pressure inputwould normally have a different set of values from temperature inputs.3. Band High and Band Low are effective only during Sterilisation phase.HA030554Issue 7 Nov 12Page 41