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Meter Operation 

Press the READ button to read the probe 
and  update  the  screen  values.    The  data 
point  can  be  cleared  from  memory  with 
the DELETE/CLR AVG button  (below). 

READ 

When  the  DELETE/CLR  AVG  but-
ton  is  pressed  and  immediately  re-
leased,  the  last  data  point  will  be  re-
moved  from  the  running  average. 
Pressing  and  holding  this  button  will 
reset the running average. 

Delete 

Clr Avg

 

The  ON  switch  turns  the  meter  on  and 
off.  When the meter is turned on, it will 
display  the  battery  status  for  3  seconds.
The  screen  will  then  display  the  most 
recently 

used 

MODE 

screen 

(Volumetric or Relative water content or 

measurement  period).    The  data  screens  for  the  Water 

Content Modes are explained on pages 8 and 10. The Peri-
od mode is used for doing soil-specific calibrations and is 
explained on page 14. 

ON 

Battery at 85%

Firmware V5.0 

Stndrd VWC%=27.1 
PL=M N008 A=26.5 

Sample meter power-up 
and data screens  

Period = 0950 uS 
N015  

Pressing  the  MODE  button  allows  the 
user  to  determine  the  type  of  measure-
ment  that  will  be  taken  or  select  the 
length of rods connected to the probe.   

MODE 

Содержание TDR 100

Страница 1: ...TDR 100 Soil Moisture Meter PRODUCT MANUAL...

Страница 2: ...Mode 6 Relative Water Content Mode 8 Identifying the Correct Com Port 9 Connecting to a PC Changing Batteries 10 Main Toolbar 11 Meter Settings 12 Meter Calibration 14 Specifications 15 Appendix 1 Soi...

Страница 3: ...omain reflec tometry is a proven technology for quickly and accurately determining volumetric water content VWC in soil The Field Scout probe allows the user to easily and rapid ly take many measureme...

Страница 4: ...ter is turned on it will display the battery status for 3 seconds The screen will then display the most recently used MODE screen Volumetric or Relative water content or measurement period The data sc...

Страница 5: ...water con tent VWC or RWC readings the rod length setting must be correct In the VWC modes the currently selected rod length appears in the lower left corner of the LCD screen The options are Turf 1...

Страница 6: ...y TDR is an average over the length of the waveguide Electronics in the TDR 300 generate and sense the return of a high energy signal that travels down and back through the soil along the waveguide co...

Страница 7: ...he chances the rods will be bent or broken Likewise it is best to avoid areas with rocks or other material that can cause the rods to deflect or bend Stndrd VWC 25 5 PL L N 06 A 23 4 The TDR meter can...

Страница 8: ...negative RWC or an RWC greater than 100 If the volumetric water contents for field capacity and permanent wilting point are the wet and dry set points respec tively the RWC value will be equivalent t...

Страница 9: ...tested and click the Port Test button Click the Test Port Now button If the message Connection OK is displayed another device such as a modem is probably connected to that port If the message No Conn...

Страница 10: ...to the meter s serial port The meter s con figuration can be modified by clicking on the Meter Set tings button see Meter Settings p 12 The Com Port Meter Type and Clear Meter Settings buttons are ex...

Страница 11: ...ntify ing the Correct Com Port p 14 for instructions on how to determine which port to select Meter Type Select the TDR option from the list of available Field Scout meters Meter Settings Click this b...

Страница 12: ...are also entered here The fields are described below Meter Name The name given the meter will be the title on the first line of the downloaded text file Units When operating the meter in Relative Wat...

Страница 13: ...m of the screen select which VWC calibration Standard or High Clay should be used for each RWC mode Each of these modes can be given a descriptive name of 5 characters These names can be used to ident...

Страница 14: ...meters can be used interchangeably The calibration procedure is as follows 1 Use the MODE button to put meter in Calibration mode see p 5 Hit the READ button 2 Hold the meter so the rods are in the a...

Страница 15: ...ay 16 character 2 line LCD Weight 1 5 lbs 0 68 kg Probe Head Dimensions 3 1 x 3 x 1 7 8cm x 7 5cm x 2 5cm Rod Dimensions Length 1 5 3 8cm 3 7 6cm 4 7 12cm or 7 9 20cm Diameter 0 2 0 5cm Spacing 1 3 3...

Страница 16: ...gradually wetting a known volume soil with the addition of known increments of water In most cases however the calibra tion will be done with gravimetric sampling This proce dure is briefly described...

Страница 17: ...he gravimetric water content and soil bulk density VWC GWC b w Where GWC is the gravimetric water content and b is the bulk density GWC 100 Mwet Mdry Mdry b Mdry Vtot The final step is to plot the cal...

Страница 18: ...s can be taken in three standard environ ments air distilled water and playground sand saturated with distilled water It is important that any troubleshooting be done with distilled wa ter Readings ta...

Страница 19: ...etting VWC values near 0 for all measurements even in very wet soil Most likely a circuit component in the display is damaged and must be repaired Contact Spectrum Technologies or your dis tributor to...

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