
Model 35 Viscometer Instruction Manual
208878
Revision N, February 2013
3
Table of Contents
1
Introduction ............................................................................................................... 5
1.1 Background ...................................................................................................... 5
1.2 Document Conventions .................................................................................... 6
2
Safety ....................................................................................................................... 7
2.1 Safe Electrical Operation .................................................................................. 7
2.2 Standard B1 Bob .............................................................................................. 8
2.3 Heated Sample Cup ......................................................................................... 8
3
Features and Specifications ...................................................................................... 9
4
Installation .............................................................................................................. 13
5
Operation ................................................................................................................ 14
5.1 Operating the Model 35A and 35SA ............................................................... 15
5.2 Operating the Model 35A/SR-12 and 35SA/SR-12.......................................... 15
5.3 Measuring Gel Strength .................................................................................. 17
5.4 Changing the Rotors, Bobs, and Torsion Springs ........................................... 18
6
Instrument Calibration Check .................................................................................. 23
6.1 Dead Weight Calibration ................................................................................. 24
6.2 Fluid Calibration Check ................................................................................... 26
6.3 Torsion Spring Calibration .............................................................................. 27
7
Test Analysis .......................................................................................................... 28
7.1 Newtonian Viscosity Calculation ..................................................................... 28
7.2 Plastic Viscosity and Yield Point Calculation ................................................... 29
7.3 Spring Constant Calculation ........................................................................... 30
7.4 Additional Viscosity Calculations ..................................................................... 31
7.5 Measuring Ranges .......................................................................................... 33
8
Troubleshooting and Maintenance .......................................................................... 36
8.1 Troubleshooting .............................................................................................. 36
8.2 Maintenance ................................................................................................... 37
9
Accessories ............................................................................................................ 38
10 Parts List................................................................................................................. 39
11 Warranty and Returns ............................................................................................. 44
11.1 Warranty ......................................................................................................... 44
11.2 Returns ........................................................................................................... 44