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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.
A 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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