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User Manual MKA 500 / MKA 800 

Conforms to 

Issue 21.02.2023_01                                                                                                                                                     Page 16  

 

4.6.1 Delta temperature (Delta-T process) 

Cooking  with  the  Delta-T  process  (Delta  temperature  control)  allows  you  to  heat  the  product 
gently and evenly.  When using this process the chamber temperature  is always kept higher, by 
the  nominal  Delta  value,  than  the  actual  core  temperature  of  the  product.  This  means  the 
temperature difference between the surface and the core of the product always remains constant. 
The pre-set nominal temperature value is used as an upper limit value for temperature control.  
A  lower  nominal  Delta  value  will  prolong  the  duration  of  the  cooking  process  and  the  heating 
process is gentler, a higher nominal Delta value will speed up the cooking process. 

 

 

Hint 

Apart  from  a  nominal  temperature  value  and  a  nominal  Delta  value,  you  can  also  enter  a 
nominal core value, which will be used as core shut-down condition for the step.  

4.6.2 FC value 

 

Hint 

Bacteria have to be killed through pasteurisation (FC70) / sterilisation (FC121). How 
thoroughly the bacteria are killed depends on the temperature and the length of time this 
temperature is maintained. A mathematical formula can be applied to this process. The 
degree to which the bacteria are killed is called FC value. 

 

The process: 

 

It is the aim of 

sterilisation 

to kill

 

all the bacteria and their spores. How thoroughly the 

bacteria are killed depends on the temperature and the length of time this temperature is 
maintained. A mathematical formula can be applied to this process.  
  

(

)

(

)









=





te

Samplingra

F

Value

z

mperature

eferencete

r

T

ature

coretemper

ref

60

10

 

 

The degree to which the bacteria are killed is called F-value.  
For meat cans F-value 1 means the bacteria extermination which is achieved at a core 
temperature of 121,1°C, when maintained for one minute. How thoroughly the bacteria are 
killed also depends on the acidity of the conserved product. Acidic conserves, fruit juices, 
pickled gherkins etc have a higher killing rate and therefore a different FC value table than 
normal meat conserves with a PH value between 5 and 7.  
In order to avoid confusion, two further indicators can be added to the F-value, e.g. FC 121-
10 (z-value), this means that at a core temperature of 121,1°C and a time of one minute, the 
F-value = 1. If the temperature is increased by 10°C, the F-value increases 10-fold.  

 

Example of  FC-value 121: 

 

 

 

Example FC-value 70: 

(

)

=

10

1

.

121

10

121

C

ature

coretemper

T

FC

 

 

(

)

=

10

70

10

70

C

ature

coretemper

T

FC

 

 

 

Hint 

Depending on the setting, the nominal FC value is shown as displayed below.  

 

FC70 (pasteurisation), see example FC value 70 

 

FC121 

(

sterilisation)see example FC value121

.

 

 

FC-UD, user defined settings

 

 

 

 

Be aware 

Shut-down condition: 

When  the  pre-programmed  FC-value  has  been  reached,  the  controller  will  automatically 
switch into the next step or terminate the program, respectively. 

Summary of Contents for MKA 500

Page 1: ... as Autoclaves Version V00 13 Issue 21 02 2023_01 Measurement and Control technology Hardware development Software development Specialised electronics Food technology Process visualisation aditec gmbh Talweg 17 D 74254 Offenau Tel 49 0 7136 96122 0 Fax 49 0 7136 96122 20 www aditec net eMail info aditec net ...

Page 2: ... values 14 4 3 Nominal temperature 15 4 4 Nominal core temperature 15 4 5 Step time 15 4 6 Optional nominal values 15 4 6 1 Delta temperature Delta T process 16 4 6 2 FC value 16 4 6 3 Aggregate modules direct relay actuation 17 4 6 4 Optional control loops 17 4 6 5 Step by step control 18 4 7 Shut down condition 18 4 8 Negative core shut down Shower Cooling 18 4 9 Pre heating function 19 5 Standb...

Page 3: ... 2 4 Alarms 33 7 3 Alarm signal 33 7 4 Program runtime operating time display in operating mode 33 8 Profile settings 34 8 1 Setting date and time of day 34 8 1 1 Automatic change over between summer and normal time 35 8 2 Display settings 35 8 3 Status bar display 36 8 4 Enabling signal relay 37 8 5 Enabling a batch number 38 8 6 Data logger 39 8 6 1 Copying data onto a USB stick 40 8 7 Enabling ...

Page 4: ... page press button Press several buttons simultaneously This symbol indicates a useful hint or gives a tip Factory setting Display is flashing Be aware This symbol points out measures you should take in order to avoid potential problems Code is supported by the service program Press a button for 3 seconds or wait 3 seconds Indicates a sequence of actions that should be executed one after the other...

Page 5: ...100 temperature inputs and 2 convertable inputs for either Pt100 and current 4 20mA voltage 0 10V or thermo elements conforming to DIN EN 60584 For communication the following interface is available Mini USB interface To facilitate adaptation for different applications each control loop can be used as 2 point controller XP controller or with PID behaviour MKA 500 The standard version has 5 relay o...

Page 6: ...II and III Actual value step time program runtime remaining program time cut button IV Nominal step time cut button IV Current time of day Temp button short cut button I Core button short cut button II Humidity button cut button III Time button left cut button IV Start Stop button right Cursor button down Cursor button up Delta button Line button press up and down button simultaneously Display 1 2...

Page 7: ...program runtime remaining program time Nominal step time Current time of day Temperature button Core temperature button Time button Button for free configuration e g Delta temperature Prog button Step button Line button Start Stop button Button controlling the cursor position on the display Button for changing nominal values selecting settings Enter button Confirming settings 1 2 3 4 5 6 8 9 11 12...

Page 8: ...or entering the following nominal values humidity min max Time Short cut button for entering the following nominal value step time Delta Short cut button for entering the following nominal value Delta Start Stop Starting and stopping programs Cursor buttons Moving the cursor within the display selecting specific settings Line Confirming an entry and focussing the next item by briefly pressing both...

Page 9: ...minal values Selecting settings Enter Confirming settings Prog Selecting a program Step Selecting a program step Line Confirming an entry and focussing the next item by clicking once Leaving the screen code by pressing for at least 3 sec Shortcut buttons Shortcut buttons Shortcut buttons I IV e g Delta temperature humidity single step control aggregate modules Table 2 Button functions MKA 800 2 3 ...

Page 10: ...an alarm or the end of a program has been reached LED is lit when the controller is in operation Table 3 LED Display MKA 500 2 4 1 LED Display MKA 800 Button LED off LED on Relevance Temperature Temp LED is flashing when a nominal value is changed Core temperature Core LED is flashing when a nominal value is changed Time LED is flashing when a nominal value is changed Start Stop LED is flashing wh...

Page 11: ... relays if enabled MKA 500 MKA 800 Aggregate button is activated Aggregate button is de activated 2 6 Interval times When the relay is active the text of the nominal value is highlighted in white Aggregate button Relay name Relay status Button status inactive active Relay off Relay on K5 off Text grey K4 on Text white ...

Page 12: ...the arrow button down until you go past value 0 when a minus sign will appear in front of the numbers Entering positive values MKA 500 MKA 800 When you want to change a negative number into a positive one you can position the cursor on the sign and overwrite it with a via the arrow button up or you can enter a value higher than 0 Hint Scrolling characters MKA 500 MKA 800 Use the arrow buttons up d...

Page 13: ...nd the character is deleted Hint Scrolling through the characters MKA 500 MKA 800 Use the arrow buttons up down keep pressed to scroll a character 3 3 Buttons The button allows the user to trigger an assigned function When the button is focussed frame around the info text it can be activated by using the Line button If several buttons exist you can use the arrow buttons up or down respectively to ...

Page 14: ...y chosen item is automatically selected 4 Relevance of the nominal values The controller allows you to pre program different nominal values within a program step In the following chapter the relevance of the individual nominal values is explained Be aware Depending on the system and the application nominal values can be configured in different ways for individual processes This means that you may ...

Page 15: ...rminated The controller works with two types of core shut down Positive core shut down heating operation If the pre programmed nominal temperature value is higher than the nominal core temperature value the controller will switch to the next step as soon as the actual core temperature is higher or equal to the nominal core temperature Negative core shut down cooling operation If the pre programmed...

Page 16: ...he bacteria and their spores How thoroughly the bacteria are killed depends on the temperature and the length of time this temperature is maintained A mathematical formula can be applied to this process te Samplingra F Value z mperature eferencete r T ature coretemper ref 60 10 The degree to which the bacteria are killed is called F value For meat cans F value 1 means the bacteria extermination wh...

Page 17: ...urrent actual value and the current nominal value is shown If you have set a switch on interval and a switch off interval for an aggregate module the interval times will be shown alternately in the actual value display The status of the aggregate module button without delay is shown on the button Be aware If a nominal value is changed during operation via VisuNet the display will be updated reset ...

Page 18: ... pre programmed OFF the related switch off condition is disabled Shut down conditions are Nominal step time has elapsed and has reached 00 00 Nominal core value has been reached Negative core shut down cooling e g shower Nominal FC value has been reached Nominal humidity value has been reached Unplanned shut down if Stop button is pressed which leads to a program termination There is a temperature...

Page 19: ...ure reached Continue will be shown even if the rest time interval is still running Hint This function is pre configured by your service technician 5 Standby As soon as the controller is connected to a power source it will automatically boot up This can take up to 1 minute Be aware Please do not use pointy objects to operate the controller e g pointed fingernails biros sharpened pencils or screw dr...

Page 20: ... only access programming mode when the pre set number of programs is greater than 0 please ask your service technician If the number of programs is set to 0 only one program manual program is available you can set up this program from standby 6 1 Program set up Standby MKA 500 6 1 1 Entering a temperature 6 1 2 Entering a core temperature Changing nominal value ändern LED flashing Nominal value is...

Page 21: ...re available in your controller it depends on your specific configuration 6 2 Program set up Standby MKA 800 6 2 1 Entering a temperature 6 2 2 Entering a core temperature Nom value is flashing LED flashing Changing nom value Saving nom value LED off Nom value is flashing LED flashing Changing nom value Saving nom value LED off Changing nominal value LED flashing Nominal value is flashing 4 Saving...

Page 22: ... individual processes This means that you may find that not all the nominal values described here are available in your controller it depends on your specific configuration 6 3 Program start 6 3 1 Start from standby MKA 500 6 3 2 Start from standby MKA 800 Nom value is flashing LED flashing Changing nom value Saving nom value LED off Changing optional nom values LED flashing Nom value is flashing ...

Page 23: ... enabled the controller is now going to ask for a batch name Hint A batch number has to be entered when this feature has been enabled or the program cannot be started The batch description can consist of up to 10 characters By pressing the Line button for about 3 seconds you can terminate the starting process 6 3 5 Starting a program with starting time MKA 500 Hint While the waiting time interval ...

Page 24: ...ng mode is only possible when the pre set number of programs is higher than 0 please ask your service technician 6 4 1 Programming mode MKA 500 6 4 1 1 Program Step selection When you press function button Delta and keep it pressed the program selection function on the status bar will be activated Now you can change the program If you are in program selection mode and you press the Delta button ag...

Page 25: ... to Issue 21 02 2023_01 Page 25 6 4 1 2 Program entry Hint The program name can consist of max 8 characters 6 4 1 3 Changing nominal values within a step PRG NAME FASHES SELECT CHARACTER CURSOR POSITION CONTINUE TO ASSIGN PROCESS IN STEP ...

Page 26: ...int Only nominal values that have been enabled in the configuration can be entered changed here 6 4 1 4 Terminating programming mode Press the button for about 3 seconds and programming mode will be terminated 6 4 2 Programming mode MKA 800 6 4 2 1 Program Step selection ...

Page 27: ...6 4 2 3 Changing nominal values within a step Hint Only nominal values that have been enabled in the configuration can be entered changed here 6 4 2 4 Terminating programming mode Press the button for about 3 seconds and programming mode will be terminated SELECT CHARACTER CONTINUE TO ASSIGN PROCESS IN STEP SELECT NOM VALUES SELECT NOM VALUES ...

Page 28: ...ast pre programmed step has finished Hint The number programs and steps can be pre programmed by the service technician to suit your requirements Service program number of steps 6 6 Copying deleting and inserting programs steps Be aware Access to programming mode is only possible when the pre set number of programs is greater than 0 please ask your service technician Program box MKA 500 Program bo...

Page 29: ...00 Copying a step The program to be copied is shown in box Select the program number you want to copy box Select the step number you want to copy box Confirm your entry by pressing Enter box or cancel by pressing Cancel box Deleting a step Deleting a previously selected step Confirm your entry by pressing Enter box or cancel by pressing Cancel box 3 Sec 1 2 3 3 2 1 Step no is flashing 2 1 1 2 3 Se...

Page 30: ...in operation this means a program is running The LED in the Start Stop button is lit On the status bar the states of the relays are shown1 7 1 Nominal values A service technician can make nominal values available by changing the configuration of the controller The relevance of these nominal values can vary this is why your service technician should explain them to you 1 Depends on whether the sett...

Page 31: ...regate relais and digital inputs display On the status bar all relays and their status are shown All digital inputs if configured are shown on the status bar together with their respective operating status Digital inputs D1 D2 D3 D4 have been configured Digital inputs D2 and D4 have been configured 7 1 2 Aggregate modules If aggregate modules have been enabled you can influence them Types of modul...

Page 32: ...sion from version V00 06 onwards On the status bar the progress of the program is shown as a progression bar The total program runtime or remaining program runtime total time of all program steps respectively is displayed graphically Display in percent Display of the remaining program runtime as a time value or as a percentage of the total program runtime 7 2 2 Remaining program runtime The remain...

Page 33: ...ensor break program is terminated Core sensor break program is terminated only when nominal value is pre programmed 7 4 Program runtime operating time display in operating mode Press the Time button for about 3 seconds to display the program runtime and or the remaining program runtime while a program is in operation Current step time Runtime of a program Program runtime Duration of the current pr...

Page 34: ... The settings under this code do not change the controller settings MKA 500 or Password entry 0000 MKA 800 or Password entry 0000 8 1 Setting date and time of day Setting the current date and time MKA 500 MKA 800 3 Sec Profiles Menu item from list 3 Sec Menu item from list 3 Sec Profiles Menu item from list 3 Sec Menu item from list 3 Sec Profiles Date Time 3 Sec Profiles Date Time Figure 12 Profi...

Page 35: ...e when there is a tick in the Check box Daylight Time Summer time starts on the last Sunday in March at 2 00 o clock and ends on the last Sunday in October at 3 00 o clock This means that the clock moves forward by one hour at 2 00 a m on the last Sunday in March and moves back by one hour at 3 00 a m on the last Sunday in October Summer time Normal time Hint The time change can only happen in sta...

Page 36: ...ring operation to skip between values on the status bar see item 7 2 Status bar page 32 V Relay activated Current status on the status bar above V1 switched on V2 to V5 switched off Hint The virtual relays can be labelled named and individually configured by your service technician 3 Sec Profiles Status bar 3 Sec Profiles Status bar Showing nominal values standby operation Current time of day Code...

Page 37: ... setting Signal enable Yes Time from 00 00 to 00 00 means Signal can always be switched on Signal programmable before the start of a program Prg sig start No If an alarm is triggered signal relay is actuated you can acknowledge it by pressing the button MKA 500 MKA 800 for If there no is current alarm event you can activate or de activate the alarm during operation by pressing the button MKA 500 M...

Page 38: ...ng a batch number Enabling batch number entry before every program start MKA 500 MKA 800 Factory setting Batch number entry is disabled Hint A batch number can have a maximum of 10 characters You can enter a mixture of letters and numbers 3 Sec Profiles BatchNo 3 Sec Profiles BatchNo Current time of day Enabling batch number Code number 3 sec ...

Page 39: ...cally logged onto a µSD card when VisuNet is not active Interval display the time intervals at which you want the data to be logged Factory setting Auto automatic logging of data Interval 000 min Hint At a pre set interval time of 0 min the data is logged at 30 second intervals If the data logger is activated Active Yes there may be a slight delay of up to 3 seconds at the start of a program Hint ...

Page 40: ...a USB stick Be aware The USB interface of additional board ZSU is only meant to be used to read out retrieve data logger files Please DO NOT connect any USB periphery devices key board mouse printer at this interface All common USB mass storage devices in FAT16 and FAT32 format are supported NTFS formatted USB mass storage devices and external hard disks are not supported If a USB Error while copy...

Page 41: ...SB flash drive 8 7 Enabling VisuNet program Hint This function will be configured by your service technician 8 8 Version number display MKA 500 MKA 800 This code setting allows you to see the software version of the controller You need the version number in case you have to contact the manufacturer Button MKA500 MKA800 will be flashing Press the button and further functions will be shown Hint QR C...

Page 42: ...figuration e g service programme or by changing a code setting UP Update Configuration was saved during the update of the controller CO Code Code 9993 was executed basic configuration loaded BS Basic Settings Basic configuration loaded during the boot process FS Factory Settings Total deletion carried out in the boot process 3 Sec Profiles Sensorinfo 3 Sec Profiles Sensorinfo Sensor information Se...

Page 43: ...en saver comes on can be pre set Entry range from 00 10 to 99 59 minutes seconds Checking on the screen saver 9 Power failure If a running program was interrupted by a power failure or because the appliance was switched off the controller will automatically resume the interrupted program as soon as power is restored Be aware Your service technician can pre program how the controller should react i...

Page 44: ...ed Press the Stop button Page 23 Linking programs Controller cannot be started Disruption of the power supply Take the controller off the power supply for at least a minute Now switch the controller on again and try to operate it Short circuit temp sensor Temperature sensor defect Running program is terminated Replace the sensor or assign a different sensor to the measured variable under Code 4400...

Page 45: ...m VisuNet The visualisation program aditec VisuNet allows you to connect the controllers to a superordinate surveillance system This enables you to monitor and log temperature and humidity profiles of processes ensuring comprehensive quality control of the treated products in your plant in compliance with ISO 9000 Hint Please ask aditec for the information on the VisuNet program 11 1 Connection ca...

Page 46: ...pany aditec 12 Technical data 12 1 MKA 500 See data sheet Programmable controller MKA 500 for cooking universal baking boiler systems and autoclaves http www aditec net MKA500_data sheet_en pdf 12 2 MKA 800 See data sheet Programmable controller MKA 800 for cooking universal baking boiler systems and autoclaves http www aditec net MKA800_data sheet_en pdf 13 Dimensions connection diagrams 13 1 Dim...

Page 47: ...User Manual MKA 500 MKA 800 Conforms to Issue 21 02 2023_01 Page 47 13 2 Dimensions connection diagrams MKA 800 ...

Page 48: ...d Additional board Additional board Ethernet RS485 USB host ZSC Additional board MKA 500 800 from SW V00 11 and from HW 09 21 The following CAN modules are supported 1x MEA24 1x MR6 1x MD12 ZA2 ZAV21 Additional board Additional board 2 analogue outputs 2 analogue output 4 20mA 0 10V 1 vacuum sensor universally programmable Figure 17 MKA500 Recess right Einschub für Zusatzplatinen ZA2 ZAV21 ZSC Ein...

Page 49: ...Letters 13 List boxes 14 List of errors 45 M Messages 32 N negative values 12 Nominal core temperature 15 45 nominal temperature 15 16 18 45 Numbers 13 O Operating mode 30 Operating time display 33 Optional control loops 31 P Power failur 44 Profile settings 34 Program runtime 33 Program start 22 Q QR Code 41 R RS485 46 S Safety instructions 51 Scrolling characters 12 Short circuit 45 Shut down co...

Page 50: ...purpose it was designed for and within the limits of its technical data We recommend that any down streamed inductors relays contactors signal transmitters valves etc with RC elements should be checked for interference These are available on the retail market e g Siemens 3 RT1916 Klöckner Moeller etc 3 Analogue in and outputs Do not apply separate source voltage to the in and outputs 4 20mA 0 10V ...

Page 51: ...nor foreign objects can get into the appliance through the openings in the housing If objects or liquids have contaminated the inside of the appliance it has to be disconnected immediately and sent in to the manufacturer 13 Servicing after damage The appliance may only be serviced by a qualified specialist The user should only do the servicing tasks he is meant to do according to the user manual F...

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