User Guide - Eurotherm Ltda

nanodac RECORDER/CONTROLLER: USER GUIDE3.4.10 Steriliser display modeThis display mode appears only if the Steriliser option is fitted and if the display mode has been enabled inthe Instrument Display configuration (Section 4.1.3). Steriliser configuration parameters are to be found inSection 4.17.Cycle statusCycle number Cycle: 123 EquilibrationInput status beaconsBand HighBand Low (red)Target setpoint (orange)Current input valuesInput 1 Input 2 Input 3 Input 4120.8°C 121.6°C 122.4°C 2885mBRemainingSterilising00.05.0000.00.00Equilibration 00.03.00Total Cycle 00.03.00Note:If any input is configured ‘Off’(in Steriliser configuration), itdoes not appear in the display,and the other inputs occupythe screen width equally.Input status beacons are blackfor inputs configured ‘Off’Figure 3.4.10a Steriliser display mode (typical) (four inputs)OPERATIONA sterilising cycle cannot be initiated whilst the unit is in Configuration (Engineer) mode.A steriliser cycle is started by setting its relevant ‘Start’ input to ‘Yes’ for the duration of the cycle. The cyclewaits (status ‘Waiting’) until input 1 reaches its setpoint, at which point the cycle enters the equilibration period(status ‘Equilibration’), and remains there until all the configured inputs are valid. The cycle then entersthe sterilising period and stays in this mode until the sterilising period has expired (status ‘Passed’) or untilone of the inputs becomes invalid (status ’Failed’) for longer than its configured ‘Failure Dwell’ time.Note: The cycle stops (status ‘Failed’) if the trigger source is removed.TERMINOLOGYHolding timeEquilibration timeBandsMost operating cycles have a stage in which the load must be exposed to sterilisationconditions for a specified length of time, known as the ‘Holding time’.The holding time (above) is preceded by a period during which, although the sterilisingcondition is present in the chamber, the load has not yet attained that temperature dueto its thermal inertia. ‘Equilibration time’ is defined as the time between the attainmentof sterilisation temperature in the chamber, and the attainment of that temperature inall parts of the load.For steam and dry heat sterilisers, sterilisation conditions are specified by a sterilisationtemperature band, defined by a minimum acceptable temperature (known as the sterilisationtemperature) and a maximum allowable temperature. A sterilisation band isnormally quoted for each steriliser type.BEACONSThere are four input status beacons near the top right hand corner of the display, one for each input.During equilibration, the beacons are flashing red for inputs that have not attained the Target setpoint, andgo green when the target setpoint is reached, remaining green even if the input value rises above the BandHigh value The beacons revert to red if input falls below* the target setpoint.During sterilisation, the beacons go red for any input whose value rises above Band High or falls below* setpointfor a duration exceeding the configured ‘Failure Dwell’ period.Beacons are black for inputs that are configured as ‘Off’.* ‘rises above’ for input types ‘Falling Pressure’ or ‘Fall Air Detect’Page 40HA030554Issue 7 Nov 12