The GDS Virtual Infinite Stiffness Loading System (GDSVIS) is the loading frame/compression machine that you would expect from GDS. It has feedback control and continuous displays of axial load and platen displacement, USB computer interface and, exclusive to GDS, Virtual Infinite Stiffness (VIS). Technical specification: Load ranges: 100kN (10ton), 250kN (25ton), 400kN (40ton) and 500kN (50ton). Custom ranges available on request. Load resolution: +/- 1 in 10,000. Load cell accuracy: non-linearity +/- 0.03%, hysteresis and non repeatability +/- 0.05%. Displacement range: 100mm. Displacement resolution: 0.1micrometre. Displacement accuracy: 0.05% of full range. Max displacement rate: TARGET: 3.75mm/min, RAMP: 1.20mm/mm, UP/DOWN: 6mm/min, RAMPTARGET LOAD control: 1.0mm/min. Min displacement rate: there is no minimum rate. Platen diameter: 100kN = 140mm, 250kN = 145mm, 400kN = 145mm, 500kN=145mm. Weight: approx. 800 kgf to 2000 kgf (depending on model). Nominal Size: 2.3m x 1.0m x 0.96m. Resolution of measurement and control: pressure = <0.1% full range, displacement = 0.1micrometre. Power: 92-265v, A.C. 48-440Hz, 65w maximum, single phase three wire earthed supply, 2A fuse x 2. Control panel: 16 keypad membrane touch panel with audio feedback. Functions include zero pressure, target pressure, zero volume, target volume, fill, empty, test, ramp, stop, continue, reset, enter, +, -, >, <, yes, no. User interface: 40 character, 1-line liquid crystal display.

Unit 32 Murrell Green Business Park, London Road, Hook, Hampshire, RG27 9GR, UK. Tel.:+44 (0) 1256 382450, FAX:+44 (0) 1256 382451, e-mail:sales@gdsinstruments.com