Chaudhary Devi Lal University Tender

RESEARCH GRADE RHEOMETER SYSTEM MAIN INSTRUMENT Motor Technology:The Measurement Motor should be a Brushless Direct Current Synchronous Motor and ably supported by High Quality Sensitive Air Bearing system to give the optimum Oscillatory response for the following wide range of Frequencies in both Control Shear Stress and Control Shear Strain Operating modes Min. Torque (Rotation): 5 nNm or better Min. Torque(Oscillation): 5 nNm or better Max. Torque: 200mNm or better Radial Motor Bearing: Air Bearing Axial Motor Bearing: Air Bearing Speed Range: 0 to 300 rad/s or better Frequency Range: 10-5 to 600 rad/s or better Normal Force Range: -50 to +50 N Strain Sensor: High Resolution Optical Encoder Measurement Types: Rotational, Oscillatory & Transient Oscillatory Modes: Strain, Direct Strain Amplitude & Control Stress Gap Setting: The lift motor in the stand should provide precise gap setting and automatically compensates gap changes related to temperature and normal force. Trimming Mirror: The trimming mirror should provide 360° view of the sample with no blind spots, to avoids sample preparation errors TEMPERATURE CONTROL SYSTEM ALONG WITH PASSIVE HOOD FOR CONE/PLATE & PLATE/PLATE MEASURING GEOMETRIES Temperature Control: Air cooled Peltier Temperature Control Temperature Range: 5 to 180 Deg C or better without any external circulator cooling. Heating Rate: 35 deg C/minute or better Cooling Rate: 30 degC/minute or better MEASURING SYSTEMS Shear Viscometry /Rheology: 1. Measuring Plate (SS) Diameter 50mm -01 No. 2. Measuring Plate(SS) Diameter 25mm -01 No. 3. Measuring Cone (SS) with 60 mm Diameter & 1 Deg Angle-01 No 4. Measuring Plate (Sandblasted) with 50 mm Diameter- 01 No. 5. Double Gap Measuring Geometry for low Viscous samples- 01 with separate Peltier Temperature Control Device from 0 to 180 Deg C UTILITIES Air Compressor:100psi, 3.5cfm Oil Free System Air Dryer: Multistage with Micro filters Computer: Branded Computer having min. specification as: i5, 2.67 GHz or higher, 8 GB RAM or more, SSD with 240 GB or more RHEOLOGY SOFTWARE Architecture: Template based with built-in templates pre-programmed for all types of materials (i) Rotational with rate/control stress/combination of csr+css, (ii) Oscillatory with strain / direct strain amplitude / control stress / combination of strain+ css (iii) Transient with creep(single/multi-level)/step-strain (stress relaxation) combination with any modes above – for e.g. transient+ rotational or oscillatory +rotational (iv) Linear Amplitude Sweep, vi. Stress relaxation modulus, creep compliance (v) Frequency Sweep (vi) Strain – Stress - Temperature Sweep (vii) Controlled Stress- Controlled Strain/Rate (viii) Linear Visco-elastic limit (linearity) to verify linear viscosity region (ix) Phase angle vs. temperature (frequency) (x) Modulus vs. phase angle (xi) Elastic and Viscous modulus vs. temperature or frequency (xii) Viscosity vs. strain rate, viscosity vs. shear stress, viscosity vs. time, viscosity vs. temperature (xiii) Angular frequency vs. complex viscosity; Angular frequency vs. storage modulus, Angular frequency vs. viscous modulus, Angular frequency vs. phase angle. Super-Imposed Testing: Steady Shear Over Oscillatory Simultaneous Operation Upgradability: The Rheometer should be upgradable to Powder Rheology, Rheo-microscopy, Small Angle Light Scattering Systems (SALS), Humidity Control Chamber & Tribology. This should be clearly mentioned in the Product Catalogues to support the claim Warranty: 03 years