Brookfield DV-III Ultra Rheometer Instrukcja Użytkownika Strona 5
- Strona / 133
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Oceniono. / 5. Na podstawie oceny klientów
Brookeld Engineering Laboratories, Inc. Page 5 Manual No. M/98-211-B0104
Brookeld Engineering Laboratories, Inc. Page 5 Manual No. M98-211-E0912
The Brookeld DV-III Ultra Programmable Rheometer measures uid parameters of Shear Stress
and Viscosity at given Shear Rates. Viscosity is a measure of a uid’s resistance to ow. You will
nd a detailed description of the mathematics of viscosity in the Brookeld publication “More
Solutions to Sticky Problems”, a copy of which was included with your DV-III Ultra.
The principle of operation of the DV-III Ultra is to drive a spindle (which is immersed in the test
uid) through a calibrated spring. The viscous drag of the uid against the spindle is measured
by the spring deection. Spring deection is measured with a rotary transducer. The viscosity
measurement range of the DV-III Ultra (in centipoise or cP) is determined by the rotational speed
of the spindle, the size and shape of the spindle, the container the spindle is rotating in, and the full
scale torque of the calibrated spring.
The DV-III Ultra can also measure yield stress (in Pascals or Pa). See Section I.3 for more information
on yield stress.
I.1 Torque Measurement
There are four basic spring torque models offered by Brookeld:
Spring Torque
Model dyne•cm mN•m
LVDV-III Ultra 673.7 0.0673
RVDV-III Ultra 7,187.0 0.7187
HADV-III Ultra 14,374.0 1.4374
HBDV-III Ultra 57,496.0 5.7496
The higher the torque calibration, the higher the viscosity measurement range. The viscosity
measurement range for each spring torque model may be found in Appendix B.
I.2 Viscosity Units of Measurement
All units of measurement are displayed according to either the CGS system or the SI
system.
1. Viscosity appears in units of centipoise (shown as “cP”) or milliPascal-seconds (shown
as mPa•s).
2. Shear Stress appears in units of dynes/square centimeter (“D/cm
2
”) or Newtons/square
meter (“N/m
2
”).
3. Shear Rate appears in units of reciprocal seconds (“1/SEC”).
4. Torque appears in units of dyne-centimeters or Newton-meters (shown as percent “%”
in both cases).
The equivalent units of measurement in the SI system are calculated using the following
conversions:
SI CGS
Viscosity: 1 mPa•s = 1 cP
Shear Stress: 1 Newton/m
2
= 10 dyne/cm
2
Torque: 1 N•m = 10
7
dyne•cm
References to viscosity throughout this manual are done in CGS units.
I. INTRODUCTION
- BROOKFIELD DV-III ULTRA 1
- Table of Contents 3
- I. INTRODUCTION 5
- Maximum Torque Value 6
- Component Part Number 7
- Ball Bearing Option: 10
- Electrical Certication: 10
- CLAMP ASSEMBLY 12
- DV-III Ultra 12
- HEAD UNIT 12
- TENSION SCREW 12
- Connector 14
- RS-232 Serial 14
- Printer/Computer 14
- STRIP CHART RECORDER 16
- II. GETTING STARTED 18
- “REMOVE SPINDLE, LEVEL 18
- KEY.” Press a key 18
- TORQUE LESS THAN 0% 21
- SELECT SPDL key. The DV-III 21
- MOTOR ON/OFF/ESCAPE key 21
- one minute. 150 seconds 32
- USE SET:_ 33
- STEP TIME = 00:05 33
- USING PREPROGRAMMED SPEEDS 37
- OPTION/TAB key 38
- LOCKOUT OPTIONS 38
- PROG RUN key is pressed 40
- PROG RUN 40
- ENTER key. Assume that the 41
- ENTER key, our display will 41
- PROGRAMMED SPEED STOP 41
- PROGRAMMED SPEED HOLD 42
- SINGLE SPEED 49
- DVIII SPEED/TIME PAIRS 50
- B.E.V.I.S. PROGRAMS 50
- STANDARD CASSON PRINTOUT 51
- 1. Casson (Standard) 52
- 3. Bingham Plastic 52
- 4. Power Law 53
- 5. IPC Paste Analysis 53
- Figure IV-44: Test Screen 55
- Figure IV-45: Run/Data Screen 55
- Figure IV-46: Setup Screen 56
- Figure IV-47: Analysis Screen 56
- Figure IV-48 57
- = shear stress 58
- Figure IV-65 79
- V. OPTIONS 89
- ENTER key 89
- V.4 Set Temperature 91
- V.6 Timed Data Collection 93
- Do Not hit the 96
- CONE with the CUP! 96
- A.3 SETTING THE GAP 97
- Universal Spindle Ranges 99
- Rheometer at 45 RPM 100
- Spindle Speed = 45 RPM 100
- RHEOLOGICAL PROPERTIES 105
- Table D-1 (continued) 108
- (S x T) 112
- +/-) 0.1°C 114
- °C, are shown in Table E-1 114
- Table E-1 115
- °C, 93.3°C, 149°C 115
- Table E-2 115
- + 500) cP = (+/-) 622.57 cP 119
- Figure F-1 121
- DV-III Ultra Stand Assembly 122
- Item Part # Description Qty 122
- 4 hex digits. Calculate the 125
- Zero offset = tval/100 125
- VISCOSITY TEST REPORT 133
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