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Summary of Contents for Novasina LabTouch-aw
- Page 1 aw-Messgerät / aw measuring instrument / Appareil de mesure aw Operating Instructions Leading the market thanks to INNOVATIVE solutions and sensor technology...
- Page 2 © Novasina AG, printed at 2013 in Switzerland Technische Änderungen vorbehalten Technical data subject to modifi cation Sous réserve de modifi cations techniques...
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Page 3: Table Of Contents
Change Acoustic Signals Reset to Default Values Update of the System Intensity of the Backlight Touch Screen Calibration Upgrade the LabTouch-aw Communication Interface 10. Maintenance 0.1. Cleaning of the instrument 10.2. Cleaning of the aw-measurement cell „CM-2“ 10.3. Cleaning of the Infrared „IR“ sensor 10.4. -
Page 4: Introduction
(water activity) measuring. To get the most out of all the possibilities of your Novasina LabTouch-aw and to ensure safe and reliable operation, please read these operating instructions carefully before setting the unit into operation. -
Page 5: General Product Description
General Product Description System Overview The LabTouch-aw system has been specifi cally developed for determining the water activity in a test sample like food, cosmetics or pharmaceuticals. Water activity is defi ned as the current volume and availability of “free” water in a sample and should not be directly compared with the water content (g water/ g sample). -
Page 6: System Architecture
System Architecture The LabTouch-aw consists of modular assemblies in combination with the unique resistive-electrolytic Novasina measurement technology, which is part of the aw-sensor. The aw-measurement signal is electronically processed tog- ether with the IR (infrared)sample temperature measurement and an additional temperature monitoring in the instrument's body. - Page 7 The connections (external chambers, RS232 etc.) are located on the back-side of the instrument Chamber 1 cable Power cable to 90...260V AC power supply LabClick-aw no. 1 Chamber 2 cable LabClick-aw no. 2 LabTouch-aw ADVANCED (Master) A maximum of two additional chambers (LabClick-aw) can be connected to the LabTouch-aw advanced...
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Page 8: Scope Of Delivery
This is done by various fi lter systems which are provided by Novasina. To select an appropri- ate fi lter system, consult the Novasina protection fi lter systems data sheet or contact your local Novasina distribution partner. -
Page 9: License Types
Upon receipt, please double- check if everything is present according to the scope of delivery and immediately notify your Novasina sales partner if anything is missing or broken. Do not put damaged or incomplete measuring instruments into operation. -
Page 10: Putting Into Operation
LabTouch-aw Note: The LabTouch-aw is very effi cient and requires only little electrical power. The power supply fi ts with the latest norms (fulfi lls „energy star level IV“) so the instrument can be switched-on permanently and kept ready for measurements at any time. - Page 11 The LabTouch-aw can be equipped with two additional chambers called LabClick- aw . To connect a chamber, make sure that you have a LabTouch-aw advanced version. If this is not the case, upgrade the instrument fi rst (see chapter 9.6).
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Page 12: Screens And Functions
Screens and Functions This chapter describes the main screens which appear on the display of the LabTouch-aw as well as the function of the symbols. Measurement Screen The measurement screen is displayed after the instrument has started up or if a measurement has been started. - Page 13 4.1.1 Information bar The information bar is located in the footer of the measurement screen and provides helpful information as operating conditions to the user. The various information are displayed alternately. Text or Symbol Description Remarks Date / Time Current date and time Please touch display to access the Please touch display to access the menu!
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Page 14: Main Menu Screen
4.1.3 Symbols Instead of the current measurement information in yellow colour, some symbols might be displayed. Please double-check, which chamber is affected before you try to solve the problem so that you do not stop an on-going measurement in another chamber accidentally. Those symbols have the following meaning: Symbol Description... - Page 15 Functions of the icons on the main menu screen once the icons are pressed: Symbol Description Remarks Start a measurement and switch automati- If a measurement is on-going or fi nished and the "Start" icon is pressed again, the cally to the measurement screen instrument will ask if you really want to start a new one as the current data will no longer be displayed...
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Page 16: Navigation In Sub-Menus
Navigation in Sub-Menus Navigation through the sub-menus is simple and only 4 different icons are available to do it: Symbol Description Remarks Close a sub-menu and return to the menu above Close all sub-menus and return to the measurement screen This icon is only displayed, if there are menu Move one menu point upwards points upwards the visible area... -
Page 17: Menu "System Settings
Menu point Description Remark Factory default setting The following information will be displayed: CHAMBER (number) Instrument: Measurement chamber tag Serial number: Serial number of the measurement chamber Firmware: Firmware version SENSOR Info Version: Sensor version Serial number: Serial number of the sensor Firmware: Info about the cability of the file system Last calibration:... -
Page 18: Temperature Control
Most of the samples are signifi cantly infl uenced by temperature. For this reason, the instrument is equipped with a simple temperature-controlled measurement chamber. As opposed to the LabMaster-aw, the LabTouch-aw does not offer a cooling function which just allows measurement temperatures at least +2°C but max. -
Page 19: How To Perform Measurements
How to Perform Measurements Information about starting a measurement can be found in this chapter. First Measurement Prepare the sample by cutting it into small pieces and fi ll the sample cup till the visible fi rst rim. This is approximately 2/3 of the sample cup. As the water activity is a relative measurement, the amount of sample is negligible, means, it does not matter how much sample is placed in the sample cup, the result will be the same. -
Page 20: Stability System
Even as different, more or less successful approaches are present in the market, Novasina has its own, unique equilibrium detecting system which is the most accurate and reliable one, proven by hundreds of satisfi... - Page 21 To make your decision easier, you can fi nd some recommended settings in the table below Please feel free to contact the responsible Novasina distributor in your area or Novasina AG in Switzerland (www.novasina.com or info@novasina.ch) if you need assistance in selecting an appropriate stability time for your sample.
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Page 22: Logging Functions
Logging Functions This chapter describes the logging functionalities of the LabTouch-aw Automatic Logging of the Last 10 Measurements The last 10 measurements are logged automatically. This feature is very use- ful if the measurement value has not been written down before opening the chamber since opening leads to a display refresh. - Page 23 7.2.1 Handling of the SD-Card Both, SD and SD-HC cards can be used but they need to be FAT-formatted. Please note the following, important notices: • SD-cards must only be removed while the measurement screen is displayed. Please take care that the symbol (SD-card is accessed by the system) is not displayed in the information bar.
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Page 24: Sensor Calibration
NovalogMC Sensor Calibration The electrolytic sensor can be verifi ed at any time by using the Novasina SAL-T standards which are included in the delivery or which have been bought through the local Novasina distributor. These reusable standards generate defi ned and reproducible humidity, respectively aw-values. -
Page 25: How To Handle Sal-T Standards Correctly
How to Handle SAL-T Standards Correctly The Novasina SAL-T standards are not labeled with a due date. The shelf-life itself depends on the handling and storage conditions. Experiences in the fi eld have proven that those standards can be good for 3-5 years if handled correctly. -
Page 26: Calibration And Verifi Cation
Calibration and Verifi cation To ensure the integrity of the LabTouch-aw, please set-up a defi ned standard verifi cation interval. Best case is if it is done before each measurement batch or every morning. A one point verifi cation is fairly enough. Please make sure that verifi... -
Page 27: Deleting Calibration Points
Go to "Chamber settings" -> "Sensor calibration..." -> "Info calibration points" and select the requested calibration point. The following information is dis- played. Important: Please provide this information as well if you ask Novasina to support a calibration problem. •... -
Page 28: Sensor Protection
The sensor can be protected against unauthorized changes (calibration etc.). Important: If the sensor password got lost (forgotten etc), the sensor has to be returned to Novasina in Switzerland as special equipment is required to unlock it. Please be careful while protecting a sensor! 8.7.1 Set a Sensor Password •... -
Page 29: Automatic Notifi Cation For Filter Exchange
-> "Reset fi lter warning" and the counter will be reseted. Additional Functions This chapter describes all the additional functions as system settings which can be found in the menu structure of the LabTouch-aw. Change Acoustic Signals • Go to "System settings" -> "Acoustic signals..." and select one of the options to adjust the acoustic signal: •... -
Page 30: Update Of The System
(i.e. loss of power etc.).. • Please use only fi les which are distributed by your offi cial Novasina repre- sentative. The use of other fi les can irreversibly damage the instrument and cause loss of warranty. -
Page 31: Upgrade The Labtouch-Aw
(i.e. exchange of main board). Communication Interface Note: This function requires the "advanced" version of LabTouch-aw. If you have a basic version, please contact your local Novasina distributor to purchase a license update. -
Page 32: Cleaning Of The Infrared „Ir" Sensor
Such chemical protection fi lters have to be replaced periodically due to the fact that they get saturated. Filters can increase the measurement time and they incativate the IR-temperature measurement. Novasina provides the following protection fi lters for the LabTouch-aw : • eVC-21 fi lter : Chemical fi... -
Page 33: Replacing A Cm-2 Sensor Unit
Such fi lters must be replaced immediately. Replacing a CM-2 Sensor Unit 10.6. Note: The LabTouch-aw contains sensitive electronic assemblies. Please protect these items from electrostatic discharge (esd) by discharging yourself at a grounded, conductive surface (e.g. radiator) before you open the housing of the instrument. -
Page 34: Important Notes About The Sensor
Humidity sensors are subject to certain ageing phenomena, which manifest themselves in deviations from the original value. Due to this reason, every sensor undergoes a 3 month ageing proces at Novasina so that the drift can be reduced to the lowest level possible. Nevertheless, slight deviations by time are inevitable but they can be compensated by recalibration. -
Page 35: Error Codes, First Level Support
Please observe the following rules in order to avoid measuring errors or even destruction of the sensor : • Do not let fall either the sensing element nor the LabTouch-aw and strictly avoid shock vibrations • Do not perform a measurement if the white pre-fi lter is not mounted. - Page 36 Message / Problem Cause / Reason Measure(s) (explanation see next page) Error message during system See chapter 9.3 update A protocol print-out by pressing the print button Insert a SD-card or connect the instru- has been performed but no media (SD-Card or ment to a PC with direct connection to a computer with NovalogMC) is running Nova-...
- Page 37 The measures should be performed according the sequence as listed in the row "Measure(s)" Send a picture of the displayed message and fi rmware version to your local Novasina representative Turning the instrument off and then on again. If an ordinary turn-off is not possible, please disconnect the power connector from the instrument for at least 5 seconds.
- Page 39 Notizen/Notes/Notes...
- Page 40 Novasina – Swiss Quality, Flexibility and Competence Since its establishment almost 50 years ago, the Novasina company has specialised in the accu- rate measuring of air and material humidity. The basis of this was the world’s fi rst, self-developed electronic measuring sensor for measuring humidity. This technology is based on the resistive electrolytic measurement principle.
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