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Flat Jacks

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General description
General description
Introduction
The in-situ stress, deformability and resistance feature of masonry can be determined by the flat jack method . The test is performed by making a cut to a uniform depth into the mortar courses and inserting the flat jack or couple of jacks, which are pressurized to the desired level.

Test modes:
For stress determination a single flat jack has to be used.
For deformability and resistance determination two flat jacks have to be used.

The flat jacks have to be pressurized and the strain measured using the Analogue or Digital mode as follows:

Analogue measurement
The following accessories have to be used:
  • 58-D0568/A  Hydraulic pump with gauge. See accessories.
  • 58-D0567/RS  Connecting hose (to connect the two jacks). See accessories.
  • 58-C230/30D Mechanical strain gauge. See accessories.
Digital measurement
The following accessories have to be used:
  • 58-D0568 Hydraulic pump, less gauge. See accessories.
  • 58-P0050  Pressure transducer. See accessories
  • 58-D0567/RS  Connecting hose (to connect the two jacks). See accessories.
  • 58-D0585  Electronic extensometer (one to three). See accessories.
  • 82-P9008: DATALOG 8, 8 channels stand alone multipurpose data logger (see accessories)
Note. In order to fill conveniently the testing cut, use the sets of steel sheets of the same flat jack dimensions. See accessories.

Weights:
  • 58-D0567/C2, 58-C0567/C20 …..kg. approx.
  • 58-D0567/E2, 58-D0567/E20  …..kg. approx.
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Ordering info

58-D0567/C2 
Rectangular flat jack 400x200x4,5 mm, 50 bar max. working pressure.

58-D0567/C20 
Rectangular flat jack 400x200x4,5 mm, less valves. 50 bar max. working pressure.

58-D0567/E2  
Semioval flat jack 350x260x4,5 mm, 50 bar max. working pressure.

58-D0567/E20  
Semioval flat jack 350x260x4,5 mm, less valves. 50 bar max. working pressure.

Accessories

Steel sheets to fill the testing cut
58-D0567/C11
Set of five rectangular steel sheets 400x200 mm

58-D0567/E11
Set of five semioval steel sheets 350x260 mm

Hydraulic hose
58-D0567/RS 
Connecting hose to connect two jacks. 2m length

For load application
58-D0568/A 
Hydraulic hand pump with pressure gauge 0-100 bar scale. Complete with integral reservoir and 3 m of flexible hose. Weight approx.: 8 kg.

58-D0568 
Hydraulic hand pump, without gauge, complete with integral reservoir and 3 m of flexible hose.


For strain and load measurement
58-C0230/30D 
Mechanical strain gauge for the measurement of length variation. Measuring base 300 mm x 5 mm range. Digital gauge, 0.001 mm resolution, output for PC connection output for PC (special cable required, see accessories).
For more info please refer to link to other product below. 

58-D0585 
Tubolar electronic extensometer. It consists of a tubular telescopic frame fit with an electronic displacement sensor. It has to be fit to the wall by normal anchor bolts.
  • Measuring range: 10 mm
  • Span: 300 mm
  • Linearity: 0.3%
  • Weight approx.: 0.2 kg

82-P0050
Pressure transducer, 0-50 bar

82-P0349/ELT
Connection cable for connection transducer to datalogger

58-D0568/4 
Connecting coupling for pressure transducer

82-P9008: DATALOG 8, 8 channels stand alone multipurpose data logger.
  • Adjustable 5.7" touch screen colour graphic display                                       
  • 8 independent input analogue channels         
  • Numerical and graphical display of readings   
  • Compatible with load cells, pressure transducers, strain gauges, LDT / LVDT / potentiometric displacement transducers       
  • Programmable VEXC via firmware from 1 to 10 V for each couple of channels (up to 4)         
  • Effective resolution: 131,000 points
  • Requires power supply. Battery packs for in situ application are available as accessories. For more info please refer to link to other product below. 
  • 110-230V / 50-60Hz / 1 Ph
82-P9008/ELT
Set of four cables for connecting load cells, pressure transducers, strain gauges, LDT / LVDT / potentiometric type displacement transducers to  DATALOG 8 (82-P9008)
Note: cables P9008/ELT are necessary in addition to 82-P0349/ELT

82-P9008/SOF
DATACOMM 2 data acquisition software and LAN cable for PC connection of DATALOG 8 (82-P9008).      
  • Up to 8 datalogger (total 64 channels) can be connected to a single PC creating a modular network (LAN hub is required)                 
  • Free user setting of channel groups (nr. and  type of channels)                             
  • Numerical and graphical display of the readings
  • Fully customizable multi-diagrams function including multi-channels plotted against the same axes and / or one channel plotted in relation to another                           
  • Data export ASCII format                    
  • Possibility to save and recall different calibration files allowing quick transducers swapping     


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