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EPC Products Civil Engineering Testing Instruments Geotechnical Testing Pile Testing Monitoring of Bored Pile Construction Pile Driving Analyzer (PDA) E-Saximeter (E-SAX)
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E-Saximeter (E-SAX)

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Handheld instrument registering relevant pile driving parameters, calculating diesel hammer stroke or hammer blows per minute (BPM), for an accurate pile driving log.
  • Counts hammer blows, and equivalent blows per minute for all hammer types; calculates stroke height for diesel hammers
  • Provides a drive log of blow count as a function of depth
  • Results are downloaded from the E-SAX to your computer
  • Optional accessories allow for impact velocity measurements to compute kinetic energy and depth measurements

The E-Saximeter registers all relevant pile driving parameters. It calculates the hammer operating rate in blows per minute and helps the piling inspector create a pile driving log. For single acting, open-end diesel hammers the E-Sax also displays the hammer potential energy and ram stroke. This measurement is important since excessive stroke can cause pile damage.
 
The E-Sax is a handheld instrument. In its basic configuration, the pile inspector observes the driving process and pushes a button for every depth increment as driving progresses. Several accessories further enhance the functionality of this time-tested sound recognition device including:
  • Proximity switches installed on the driving hammer and a wireless transmission system (transmitter attached to the driving hammer and E-Sax internal transceiver) enable the E-Saximeter to compute the hammer kinetic energy. Kinetic energy may be input to the GRLWEAP pile driving simulation software to fine-tune the driving criteria.
  • depth measurement reel with wireless transmission capabilities eliminates the need for manual depth increment input, automating the entire creation of the driving log.
 

Technical Specification
Main Unit

  • Size: 100mm X 190mm X 50mm
  • Weight: 0.54kg
  • Temperature range: 10 to 40°C operating -10 to 65°C storage
  • Power: Built-in rechargeable battery with 16-hour minimum duration
  • Display: LCD, 4 lines X 16 characters, viewing area 62mm X 26mm
  • Keypad: Large Key (1.27mm2), non-tactile

Electronic

  • 32-bit CICS Micro CPU up to 50MHz
  • 10-bit 2 channel analog to digital converter; 8-bit 2 channel digital to analog converter
  • Internal microphone 70 to 115 dB
  • Standard Type A USB drive for data transfer
  • 8 MB internal Magnetoresistive RAM

Functional and Other

  • Maximum blow detection rate: 68 bpm for open end diesel hammers; 300 bpm for all others
  • Operating units: English or SI
  • Full one-year warranty
  • Technical manual provided in PDF form on a USB drive

Optional Depth Measurement Unit

  • Installation: mounts on crane, cable attaches to hammer
  • Size: 305mm X910mm X 910mm
  • Weight: 73kg
  • Resolution: 0.6mm
  • Max range: 49m

Optional Energy Switches (pair of proximity switches, available in 3 types)

  • Installation: mounts on hammer
  • Size (diameter x length)18mm x 50mm30mm x 50mm30mm x 30mm
Functionality Normally Open Normally Open Normally closed (for special applications)
Weight 114 g 205 g 182 g
Switching Frequency 200 Hz 650 Hz 200 Hz
Sensing Range 10 mm 10 mm 15 mm
Repeatability .01 mm .01 mm .01 mm


Transmitters

For Optional Energy SwitchesFor Optional Depth Measurement UnitInstallationmounts on hammermounts on depth sensor

Size 90mm X 125mm X 32mm 64mm X 98mm X 34mm
Weight .54kg .46kg
Data Transmission via a standard radio protocol via a standard radio protocol
Frequency Range 2.402 ~ 2.480 GHz 2.402 ~ 2.480 GHz
Max Range 100m 100m
Electronic Low power 16-bit processor with 12-bit analog to digital converter and 12-bit digital analog converter Low power 16-bit processor with 12-bit analog to digital converter and 12-bit digital analog converter
Power Built-in rechargeable battery w/ 8-hour min. duration Suplied by +12V to +24V crane battery
Temperature Range 0 to 40°C operating; -10 to 65°C storage 0 to 40°C operating; -10 to 65°C storage
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