Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Field Scout CM 1000
Summary of Contents for Field Scout CM 1000
- Page 1 ® CM 1000 NDVI Meter PRODUCT MANUAL Item # 2953...
-
Page 2: Table Of Contents
Contents General Overview Initial Startup Connecting to a GPS Keypad Operation Normal Reading Mode Connecting to a Computer Field Scout Software Data Files Identifying the Correct Com Port Light Management Field of View Specifications ERROR messages Frequently Asked Questions Service and Support... -
Page 3: General Overview
General Overview The FIELDSCOUT® CM1000 NDVI (Normalized Difference Vegetation Index) Meter senses light at wavelengths of 660 nm and 840 nm to estimate plant health. The ambient and reflected light at each wavelength is measured. Chlorophyll absorbs 660 nm light and, as a result, the reflection of that wavelength from the leaf is reduced compared to the reflected 840 nm light. -
Page 4: Initial Startup
Initial Startup Allow the temperature of the CM1000 NDVI meter to equilibrate with the plant environment prior to sampling. For example, storing the meter overnight in a freezing tool shed and then immediately taking readings upon entry into a warm greenhouse will result in invalid data. When the CM1000 NDVI meter is first turned on, battery strength (Battery at __% ) will appear on the LCD. -
Page 5: Connecting To A Gps
Connecting to a GPS Unit The optional data logger function must be enabled using the Field Scout software in order to record a GPS signal (see Meter Settings p. 13). The GPS unit must be plugged into the CM1000 NDVI meter and working when the meter is first turned on. - Page 6 Cable Connections A GPS/DGPS cable (item # 2950CV5) is required to con- nect the CM 1000 NDVI meter to a GPS unit. This cable has a 9-pin male connection and a stereo pin that connects to the meter’s data port. You will also need a cable that allows the GPS unit to connect to a 9-pin male serial port.
-
Page 7: Keypad Operation
Keypad Operation The ON/OFF button turns the meter on and off. When the meter is turned on, ON/OFF it will display the battery status for 3 seconds. The screen will then display the amount of memory available and the status of the GPS connection. The meter then goes into normal reading mode. - Page 8 As NDVI measurements are taken, up to Data 99 readings are stored in the meter’s Recall short-term memory. These will be the readings taken since meter was turned on or the Delete/Clear Avg button was pressed This is separate from the internal data logger. The readings in short-term memory can be reviewed by hitting the Data Recall button.
-
Page 9: Normal Reading Mode
The contents of the LCD are explained below. NDVI The CM 1000 NDVI reading is reported on a scale of –1 to 1. The NDVI value is a measure of the relative greenness of the leaf. - Page 10 The response of the ambient light sensor is displayed as a brightness index value (BRT) from 0 - 9. A BRT value of one or greater indicates that there are at least 250 to 300 µmol·m ·s of PAR (photosynthetically active radiation) light available.
- Page 11 Valid NDVI readings can be taken beyond the maximum N value of 250. But N will not continue to increment unless the entire current data series is cleared, resetting N to zero. The data logger must be enabled in order to download data to a PC (See Meter Settings, p.
-
Page 12: Connecting To A Computer
Connecting to a Computer The data port on the underside of the CM 1000 NDVI me- ter can be accessed by removing the plastic screw. It is through this port that the meter is connected to either a PC or to a GPS unit. -
Page 13: Field Scout Software
Meter Type The Field Scout software supports all of Spectrum Technologies’ portable data logging meters. Be sure to select the CM 1000 NDVI Meter from the Select Meter Type screen Com Port The black software cable connects the meter to the computer data port. - Page 14 enabled by checking the first box in the Logger Settings section. If the second box in this section is checked, the logger will store GPS data only if it has been differentially corrected. If the differential correction is not found, only the chlorophyll reading will be stored in the data file.
-
Page 15: Data Files
Data Files Sample data showing results of data collected with and without GPS activated. Note: GPS signal not found when recording data in lines 10 through 15. The data is stored in comma-delimited text files. These files can be opened with text-editing software (e.g. Micro- soft Word) or spreadsheet software (e.g. -
Page 16: Identifying The Correct Com Port
Identifying the Correct Com Port T h e c o m p u t e r Communications Port to which cable connected identified by using a paper clip. 1. Disconnect the serial cable from the meter. 2. To bring up the Port Selection screen, click on the Com Port Button, select the com port to be tested and click the Port Test button. -
Page 17: Light Management
Light Management Natural sunlight is the best source of light for measuring plant reflectance because both wavelengths are present in approximately equal quantities and the quantity of light remains relatively constant. With artificial light sources, the user must be aware that different light sources emit light having different qualities. - Page 18 Like the ambient light sensors, the target leaf should always be held perpendicular to the sun’s rays to maximize light reflectance into the meter’s lens from the leaf surface. All samples must be taken against the same background. It is preferable to hold the leaf with one’s hand, not having anything immediately behind the leaf.
-
Page 20: Specifications
Specifications Individual plant leaves Measurement turf grass canopy Sample Reflectance of 660 nm and 840 nm Measurement light System Natural sun light Light Require- Artificial light: 60 Hz AC tungsten or ments halogen powered by DC current Contact Spectrum for use with 50 Hz AC (Europe) Conical field-of-view between 28.4 Measurement... -
Page 21: Error Messages
Error Messages This error occurs when any of the EXCESSIVE four light sensors are saturated LIGHT due to the ambient or reflected light being too bright. This error occurs when the MEMORY FULL optional data logger capacity has been reached. Download the data and clear the memory. -
Page 22: Frequently Asked Questions
Frequently Asked Questions Why doesn’t my CM1000 NDVI meter detect my GPS signal? The GPS receiver must be turned on and receiving satellite signals prior to turning on the CM1000 NDVI meter. The data output from the GPS must be specifically set for NMEA text. -
Page 23: Service And Support
Warranty This product is warranted to be free from defects in material or workmanship for one year from the date of purchase. During the warranty period Spectrum will, at its option, either repair or replace products that prove to be defective. This warranty does not cover damage due to improper installation or use, lightning, negligence, accident, or unauthorized modifications, or to inci- dental or consequential damages beyond the Spectrum prod-... - Page 24 DECLARATION OF CONFORMITY Spectrum Technologies, Inc. 3600 Thayer Court Aurora, IL 60504 USA Model Numbers: 2953 Description: CM1000 NDVI meter Type: Electrical Equipment for Measurement, Control, and Laboratory Use The undersigned hereby declares, on behalf of Spectrum Technologies, Inc. of Plainfield, Illinois, USA, that the above referenced product, to which this declaration relates, is in conformity with the provisions of: Directive:...
Need help?
Do you have a question about the CM 1000 and is the answer not in the manual?
Questions and answers