SPT Analyzer

  • Determines energy transferred by SPT Hammers using force and velocity measurements
  • Offers simplified reporting and analysis options to speed testing results
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The SPT Analyzer measures the energy transferred into an instrumented SPT rod during a Standard Penetration Test (SPT). This permits the adjustment of the measured N-value to the normalized N60 for standard 60% energy transfer into the rods in accordance with ASTM D4633. Compensating for widely variable efficiencies from different SPT rigs and hammer types improves the reliability of soil strength estimates used in geotechnical designs.

This instrument includes a subassembly of an SPT rod that is instrumented with two strain gage bridges and two piezoresistive accelerometers. These sensors obtain the force and velocity signals necessary for the calculation of transferred energy and transfer them to the SPT Analyzer.

The latest model of SPT Analyzer has a touch screen visible in all lighting conditions and responsive to gestures like pinch and zoom. Data analysis and reporting have been substantially updated for ease of use and faster output.

The SPT Analyzer is compliant with EN ISO 22476-3:2005. ASTM D1586 recommends normalizing results from any SPT test using energy measurements. When these tests are performed to determine the liquefaction potential of sands, D6066 not only recommends but mandates the normalization. ASTM D4633 states that the only acceptable method of determining energy for normalization of N values is by force and velocity measurements.

SPT Analyzer Specifications

October 2015
PDF Format

Physical:

Size: 320 X 250 X 68 mm (12.6 x 9.8 x 2.7 inches)

Weight: 5 Kg (11 lbs)

Temperature range: 0 to 40°C (32 to 104° F) operating; -20 to 65°C (-4 to 149° F) storage

Display: 26.4cm (10.4”), sunlight readable, resolution 1024 X 768

Built in capacitive touch screen

Video Outputs: HDMI, VGA

Power: 4-hour continuous data collection battery pack, 12 VDC car battery, or 100-240 VAC. Extra battery pack supplied.

Charging time: 6-hour maximum

Electronic:

Microsoft Windows® 10 Operating System

128 GB SSD internal drive

Ethernet port

4 USB ports

Analog signal conditioning filtering (frequency response) 5 KHZ (-3 dB)

16-bit A/D converter with sampling frequency of 10.24 MHz

4 channels with effective digitizing frequency of up to 100 KHz resulting in user selectable total sample time 82 to 205 milliseconds

Basic unit accuracy 2%

Functional:

Built in calibration test function

4 channels of traditional (cabled) data acquisition, universal (strain or acceleration on any channel)

Compatible with traditional (cabled) Smart Sensors

Automatic balancing of signals and signal conditioning

Digital (software) integration of acceleration

Signal conditioning for force and acceleration have similar frequency response

Internal calibration check of strain and acceleration

Signal amplification capability

Other:

Operates in English, SI, or Metric units

Optional external USB keyboard, mouse, and WiFi (802.11b,g,n) available

Includes both soft side carry-on luggage case and hard transit case

Equipped for remote technical support using SiteLink®

Optional TeamViewer desktop sharing software license for use with SiteLink®

Furnished with license for PDA Software Suite (PDA-S, PDIPLOT2 and PDI Curves)

Full one year warranty

Technical manual provided in PDF form on a USB drive

The SPT Analyzer includes a full warranty and technical support. PDI offers expert training in the use of the SPT Analyzer

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