:: Product Information

AIM Automatic Infiltration Meter

ICT

Infiltrometer Specifications


20cm Model8cm Model
SpecificationsUS Patent No. 4884436US Patent No. 4884436
Diameter Disk20cm8cm
Inside Diameter Water Reservoir5.1cm2.54cm
Inside Diameter Bubbling Tower2.54cm2.54cm
Length Water Reservoir81cm81cm
Bubbling Pressure Membrane30cm H2O30cm H2O
Carrying Case Dimensions (optional)28cm x 36cm x 107cm28cm x 36cm x107cm
Pressure Transducer1 psi (67cm H2O)1 psi (67cm H2O)

Instrument Logging

Analogue Channels5 differential
Resolution0.00001V—24-Bit
Accuracy0.001V
Minimum Logging Interval1 second
Delayed StartSuspend Logging, Customised Intervals
Sampling Frequency10Hz
CommunicationsUSB, Wireless Radio Frequency 2.4 GHz
Data StorageMicroSD Card, SD, SDHC & SDXC Compatible (FAT32 format)
Software CompatibilityWindows 7, 8, 8.1 & 10. Mac OS X.
Data CompatibilityFAT32 compatible for direct exchange of SD card with any Windows PC
Data File FormatComma Separated Values (CSV) for compatibility with all software programs
Memory CapacityUp to 16GB, 4GB MicroSD card included.
Temperature Range-40°C to +80°C
R/H Range0-100%
UpgradeableUser Upgradeable firmware using USB boot strap loader function

POWER

Internal Battery Specifications

960mAh Lithium Polymer, 4.20 Volts fully charged
External Power Requirements
Bus Power8-30 Volts DC, non-polarised, current draw is 190mA maximum at 17 volts per logger
USB Power5 Volts DC
Internal Charge Rate
Bus Power60mA – 200mA Variable internal charge rate, maximum charge rate of 200mA active when the external voltage rises above 16 Volts DC
USB Power100mA fixed charge rate
Internal Power Management
Fully Charged Battery4.20 Volts
Low Power Mode3.60 Volts – Instrument ceases to take measurements
Discharged Battery2.90 Volts – Instrument automatically switches off at and below this voltage when no external power connected.
Battery Life varies

Example A: With a recommended solar panel and/or recommended power source connected, operation can be continuous.Example B: Power consumption is dependent on number and type of sensors connected, frequency of measurement and measurement duration

How It Works – Example field installation

aim-dia-01

  • A Tension Infiltrometer is installed in the field and made ready for measurements as per the recommended methodology.

  • A differential pressure transducer (CL030) is installed near the bottom of the Infiltrometer and is inserted in the tubing between the top of the water tower and the bottom of the water tower. The use of a differential transducer in this way helps to eliminate the effects of bubble noise in the measurements. Figure 1 is an example of an automated Infiltrometer field setup logging two devices at the same time.

  • The pressure transducer is connected to the AIM Automatic Infiltration Meter. The transducer will output a value relative to pressure difference between the air pressure at the top of the water tower and the water pressure at the bottom of the water tower. The pressure value recorded by the transducer is linearly related to a metric value displayed on the Infiltrometer. The AIM converts the pressure value recorded by the CL030 to a metric value.

  • The researcher assigns a logging interval in the AIM. For sandy soils logging intervals can be measured in seconds. For clay soils logging intervals can be measured in minutes.

  • Figure 2 is an example output data for the CL030 pressure transducer versus time from a Tension Infiltrometer.

  • Figure 3 is the data from Figure 2 converted to cumulative infiltration and presented as a function of the square root of time. Output files can record millivolt data, cumulative infiltration data, or both.

aim-fig2-fig3-01

More Details

  • The AIM1 is a fully self-contained unit requiring power input from a solar panel (field applications) or 24V power supply (glasshouse applications).

  • All data is stored within the unit on a removable MicroSD card.

  • Communication with the AIM1 is made either by USB or wireless connection.

  • In conjunction with an ICT web-based controller, the AIM1 and/or individual sensors can be controlled remotely. Real-time, live measurements can be made remotely from any location with internet access.

  • The AIM1 is compatible with the ICT Combined Instrument Software. The software is GUI based and extremely user-friendly. This software allows complete control of the AIM1 such as real-time measurements, data logging settings, diagnostics and sensor configuration.

  • The AIM1 has a 2 wire, non-polarised bus for power supply. There is no chance of incorrect wiring of positive and negative voltage because the AIM1 is non-polarised.

  • The AIM1 has an internal lithium polymer battery that is kept charged by an external power supply (solar panel or mains DC power supply).

  • The AIM1 is IP-65 rated and has been demonstrated to operate in extreme environmental conditions. Units are being used in diverse environments from hot Australian deserts, tropical Amazon rainforests, temperate German forests, Indian agricultural fields and North American Arctic cold.

AIM Instrument

  • Automatic conversion of pressure transducer measurements to cumulative infiltration

  • Up to 4 x pressure transducers per AIM

Logging:

  • Stand-alone logging

  • 4GB MicroSD Removable Storage Card (capacity: 10+ years data storage)

  • Wireless connectivity and data transfer

  • Simple conversion and scripting

  • Flexible sensor calibration, look-up tables, and user scripts

  • 24-Bit resolution

  • IP65 rated water proof enclosure

  • Free Windows utility configuration software

  • Optional wireless logging

Power management:

  • Field: direct connected solar panel

  • Lab: mains DC power supply

  • Internal Lithium-Polymer battery

  • Internal Lithium-Polymer battery charger and power management

  • Optical isolation lightning protection


related products

Inquiry online

Dianjiang Group Limited
Add: Room 1510,15/F,New Commerce Centre, No.19 On Sum Street, Shatin, N.T., Hong Kong.
Tel: (852) 3690 1588   Fax: (852) 3690 1586
Email: Dianjiang_HK@yahoo.com.hk   Hongkong@Dianjiangtech.com
© Dianjiang Group Limited All Rights Reserved.