Brookfield YR-1 Rheometer Manual do Utilizador descarregar pdf (Página 44)

Brookeld 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

software. The code

allows the YR-1 to calculate Yield Stress.

The immersion mark selected affects the stress calculations. Ensure the selected immersion

mark reects 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

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

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 63 64

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Brookfield YR-1 Rheometer Manual do Utilizador Página 44