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Related Manuals for Yara N-Tester
Summary of Contents for Yara N-Tester
- Page 1 N-Tester Instruction manual...
- Page 2 The application rates that are recommended using this device are non-binding and do not form a contractual relationship between the receiver and Yara. Warranty or liability for correctness of the fertilizer recommendation is exempted in individual cases as the location and the cultivation conditions may be substantially different.
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Page 3: Table Of Contents
System functions ............... 17 Setting the language ..........17 Maintenance and servicing ........18 Calibration ............. 18 Resetting the N-Tester to factory defaults ..... 20 Updating the N-Tester software ......21 Replacing the batteries .......... 22 Cleaning ..............22 Transport and storage ........... 22 Disposal .............. -
Page 4: Information For Correct Use
Information for correct use Please read this instruction manual carefully before using the N-Tester. Incorrect use of the N-Tester can lead to excessive or insufficient fertilizing which may result in unnecessary costs. Correct use The chlorophyll concentration in leaves is measured as the mean of 30 individual measurements. -
Page 5: Application Errors
▪ do not perform all measurements on a small area of the field ▪ do not use the N-Tester on areas with sulphur deficiency ▪ do not use with visible drought stress (leaves rolled together) ▪... -
Page 6: Description
Description Mode of function The chlorophyll concentration in leaves is measured using the N-Tester. The mean of 30 individual measurements is displayed after successful application. The youngest fully developed leaf is illuminated in two wavelength ranges using light that is absorbed in different intensities by the chlorophyll. -
Page 7: Technical Specifications
(EN 60529): The device may be used when it is raining but must never be cleaned under running water. Operating conditions The N-Tester is suitable for the following operating conditions: ▪ 0 to +50 °C ▪ Relative humidity < 85% at up to 35°C without condensation Issue: 03.2013 (EN) -
Page 8: Overview Of The Device
Overview of the device Measuring head Finger rest Power switch ESC: Cancel / return to the previous display Enter button: Confirm selection USB connection cap Hand strap Battery chamber cover Strap eyelet Issue: 03.2013 (EN) - Page 9 10. DOWN: Moves the cursor / line marking down or to the right 11. UP: Moves the cursor / line marking up or to the left 12. Calibration disc 13. LCD panel: Displays data and other information. 14. Sliding depth stop: In order to allow the leaf to be measured with the same distance to the leaf edge each time.
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Page 10: Operation And Application
▪ Sulphur deficiency: S deficiency such as N deficiency leads to the leaves being brighter. Therefore a sufficient S supply has to be ensured when using the N-Tester. Other nutrients do not have any significant influence. Issue: 03.2013 (EN) -
Page 11: Carry Out Measurements
N- Tester readings. Therefore avoid measuring plants that suffer from visible drought stress (e.g. leaves rolled together). The following factors do not have an effect on the N-Tester reading: ▪ Time of the day when measuring ▪... -
Page 12: Internal Calibration
– Note: If foreign language text appears, please see page 177 to find out how to change the language. The following is shown in the display: N-Tester ▪ © 2013: year of the validity of the software ©2013 ▪ AP 2. 02: Version of the software AP 2.02... -
Page 13: Field
▪ Intensive solar radiation can influence the result. Hold the N-Tester so that it is covered by the shadow of your body. – A total of 30 leaves must be measured before the N- Take samples recommendation is displayed. - Page 14 The sample slot (2 x 3 mm) must be covered completely. Both markings correspond to the center line of the measurement area. If necessary, the depth stop can be moved a little to adapt to the width of the leaf. –...
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Page 15: N-Tester Reading
If you delete the entire series, you will return to the start of Delete? last sample the measurement and all readings taken so far will be entire series dismissed. continue N-Tester reading The average N-Tester reading from 30 measurements is N-Tester displayed. Issue: 03.2013 (EN) -
Page 16: History
Start a new series of measurements Start a new series of measurements using – To start a new measurement in a new field select New New measurem. New selection selection using and press Same field Back Now you are back in the menu Field. –... -
Page 17: System Functions
System functions Setting the language – From within the Action menu select Settings using Action Measurement and press History Settings – Select Language. Settings Device test – Press Language To return to the main program without selection: – Press Language Select your preferred language by pressing English Press... -
Page 18: Maintenance And Servicing
Maintenance and servicing Calibration If you have not used the N-Tester for longer periods (several weeks), the calibration should be checked using the calibration disc supplied. – Take out the calibration disc to the front. A special calibration disc belongs to every device. The serial number of the device (1) and the serial number of the calibration disc (2) must correspond with each other. - Page 19 (4). Note: Calib. value: If the value measured does not lie within the specified 63,4 tolerance range, a reliable fertilizing recommendation is not possible. In such cases, please contact YARA directly (see the reverse of this manual). Issue: 03.2013 (EN)
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Page 20: Resetting The N-Tester To Factory Defaults
Resetting the N-Tester to factory defaults To reset the N-Tester to factory defaults switch the device off, hold down together and power the device on again. Now all settings have been reset to factory defaults. – CLEAR PSA/PPA Device settings You must switch the device off to do a new –... -
Page 21: Updating The N-Tester Software
Updating the N-Tester software The N-Tester software can be updated. (The year of validity is indicated below the Yara logo on the startup screen.) You require a PC with internet access for updating. – First switch on the N-Tester. –... -
Page 22: Replacing The Batteries
Transport and storage – When transporting the N-Tester, avoid knocking and scratching the display. Keep the N-Tester in the supplied belt bag or in the transport box. – Take out the batteries when the device is not used for longer periods. -
Page 23: Disposal
Storage conditions: -20 to 55 °C, < 85% relative air humidity up to 35 °C without condensation, no direct solar radiation Disposal The device and batteries may not be disposed of in normal domestic rubbish. Note the separate enclosed packing for the disposal of the device and batteries. -
Page 24: Troubleshooting
Device info was sent to serial port. If the fault is not specified here or you are unable to remedy the fault, please contact YARA directly (see the reverse of this manual). Issue: 03.2013 (EN) - Page 25 Notes Issue: 03.2013 (EN)
- Page 26 Notes Issue: 03.2013 (EN)
- Page 27 Notes Issue: 03.2013 (EN)
- Page 28 Contact YARA GmbH & Co. KG Hanninghof 35 48249 Dülmen Germany Tel. 02594 / 798-0 Fax 02594 / 798455...