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E-Saximeter (E-SAX)
USA
Counts hammer blows, and equivalent blows per minute
Results are downloaded from the E-SAX to your computer
Optional accessories allow for impact velocity measurements to compute kinetic energy and depth measurements
Provides a drive log of blow count as a function of depth
Pre-programmed and user programmable hammers
Entirely wireless

E-Sax is a 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.

Depth Measurement Reel
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.
A depth measurement reel with wireless transmission capabilities eliminates the need for manual depth increment input, automating the entire creation of the driving log.

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 Magnetoresitive RAM

Functional and Other:

  • Maximum blow detection rate: 68 bpm for open end diesel hammers; 300 bpm for all others
  • Operates in English or SI units
  • Full one year warranty
  • Technical manual included

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):
FunctionalityNormally openNormally openNormally closed (for special applications)
Size (diameter x length)18mm x 50mm30mm x 50mm30mm x 30mm
Weight:114 g205 g182 g
Switching Frequency:200 Hz650 Hz200 Hz
Sensing range10 mm10 mm15 mm
Repeatability.01 mm.01 mm.01 mm

Installation: mounts on hammer

Transmitters:
 for Optional Energy Switches:for Optional Depth Measurement Unit:
Installation:mounts on hammermounts on depth sensor
Size:90mm X 125mm X 32mm64mm X 98mm X 34mm
Weight:.54kg.46kg
Data transmission:via a standard radio protocol
Frequency Range:2.402 ~ 2.480 GHz
Max range:100m
Electronic:Low power 16 bit processor with 12 bit analog to digital converter and 12 bit digital to analog
converter
Power:Built-in rechargeable battery w/8 hour min
duration
supplied by +12V to +24V crane battery
Temperature range:0 to 40°C operating; -10 to 65°C storage