Brookfield YR-1 Rheometer - Manual (Page 44)

Brookfield Engineering Labs., Inc. Page 44 Manual No. M02-215-B0412
APPENDIX A - Spindle and Model Codes
The V-72 and V-73 spindles are supplied with the YR-1. Optional spindles include V-71, V-74,
and V-75.
Each spindle has a two (2) digit code which is selected via the EZ-Yield TM software. The code
allows the YR-1 to calculate Yield Stress.
The immersion mark selected affects the stress calculations. Ensure the selected immersion
mark reflects the mark in use.
Each spindle has a Yield Multiplier Constant (YMC) for stress calculations and a Spindle Mul-
tiplier Constant (SMC) for calibration checks (see Appendix C) as shown in Table A-1. Spindle
dimensions are also listed.
Spindle
Spindle
Code
YMC SMC
Vane Length
inches cm
Vane Diameter
inches cm
V-71 71 0.5 2.62 2.708 6.878 1.354 3.439
V-72 72 2.0 11.1 1.706 4.333 .853 2.167
V-73 73 10.0 53.5 .998 2.535 .499 1.267
V-74 74 100.0 543 .463 1.176 .232 .589
V-75 75 40.0 213 .632 1.61 .316 .803
Table A-1
Note: If secondary immersion mark is selected, the YMC value is doubled.
Table A-2 lists the model codes and spring torque constants (TK) for each Rheometer model.
Model Tk
Model Code on
YR-1 Screen
RVYR-1 1 RV
HBYR-1 8 HB
5HBYR-1 40 5HB
Table A-2
The full scale Yield Stress range for any YR-1 model and spindle may be calculated using the
equation:
Full Scale Yield Stress Range (Pa) = TK x YMC x 10
where:
TK = YR-1 Torque Constant from Table A-2
YMC = Yield Multiplier Constant from Table A-1