TENSMEG: Tension Measuring Gauge for 7-Wire Strands
The TENSMEG (tension measuring gauge) for monitoring strains in 7-wire strands, is an elongated spiral strain gauge comprised of a Teflon® coated resistive wire, extending between two hard, rubber end anchors.
The TENSMEG (tension measuring gauge) for monitoring strains in 7-wire strands, is an elongated spiral strain gauge comprised of a Teflon® coated resistive wire, extending between two hard, rubber end anchors. The TENSMEG is an accurate and cost-effective means to examine load and strain in rock and soil anchors, and also in cable bolts used for rock support. Pre-stressed and post-tensioned concrete load and strain may also be effectively measured.
Due to its construction, the resistance wire is precisely inserted into the spiral grooves of the 7-wire strand used for anchors and therefore is well protected. The gauge has an excellent linear response, accuracy, and long term stability with water resistance capability. Specifications are unaffected when the TENSMEG is surrounded by cement grout or embedded in concrete structures.
The QB120 Resistance Strain Gauge Readout, reads, displays, and logs 1/4 bridge strain gauges. It is also the intended readout for the TENSMEG.
|Full Scale Tension||Exceeds 50,000 με|
|Full Scale Compression||3000 μ, dependent on level of pre-tension applied during installation|
|Length||48 cm (18.9 in) – other lengths available upon request|
|Gauge Factor||2.0 nominal|
|Gauge Resistance||120 Ohm|
|Excitation Voltage||1 V – 10 V DC|
|Initial Creep||Less than 30 με, 48 hrs. after installation|
|Total Creep||Less than 100 με, 3 months after installation|
|Yield Limit of Resistance Wire||4,000 – 18,000 με depending on gauge length|
|Maximum Water Pressure||Tested to 2 MPa|
|Temperature Effect||Less than 1 με / °C (-10° to 75°C)|
Tension Measuring Gauges are commonly used to:
View illustrations on how Tension Measuring Gauges are used for:
|TENSMEG Strain Gauge – 48 cm long||ELTM4800LH|
|TENSMEG Electrical Isolation Coating||ELTM1040|
|TENSMEG Installation Tool Set||ELTM1000|
|TENSMEG Bonding System (10 gauges)||ELTM1020|
|Heat Shrink Tubing (1 per gauge)||ELTM1050|
|Cable (4 conductor x 22 AWG, polyurethane jacket 0.250”diameter)||EL380004|
|AQUASEAL Waterproofing Tape (1/5 gauges)||ELTM1030|
|TENSMEG Readout (QB120)||ELTM-QB120|
|flexDAQ Data Loggers|
I’m very happy with the quality of the instrumentation and technical support from RST, as always. They worked with us from the initial stages of the project to ensure that we were fully prepared and equipped to use the RSTAR network for the first time. They delivered everything within the tight project time frame to ensure that there were no delays on site, and the submersible tilt meters looked like new even after over twelve months of being submerged in Thames water!
-Richard Lipscombe, BEng (Hons), Director & Principle Consultant - RL Geotechnical Ltd