MRC VIS-Series User manual

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] m[email protected]
MRC.VER.02-11.10
INSTRUCTION MANUAL FOR
VIS-Series
Digital Viscometer

V,6 type digital viscometer is the most universal viscosity measurement instrument in the
world. It is a great favorite of customers for the high cost-performance. It offers state-of-the-art
functions and performances among the similar style of instruments. It is a digital viscosity
measurement instrument features in a high micro-step driving of stepping motor with 16 bit
micro-processor as the nuclear as well as a digital liquid crystal display with blue
light-background. The features also include stable and accurate rotary speed, distinct keys,
programmable design, easy operation. It will give a warning when the torque is out of 10% to 90%
of the measuring range. The RTD temperature probe can monitor and measure viscosity and
temperature to nearest 0.1oC in real-time. The temperature range of measurement is -20oC to
120oC. Viscosity, shear rate, shear stress, rotary speed, temperature, percent torque, serial number
of the spindle and the maximum viscosity can be measured at current rotary speed of selected
spindle are displayed directly on the screen. Data can be printed via a RS232 interface with the
printing interval set by users according to their own demand. The bidirectional RS232 interface
allows communication with computer, programming and data acquisition. Through the optional
V,6 programmable offline downloading software, customized measurement programs can be
downloaded to the instrument for automated and individual operating. The optional rheological
characteristic software enable the functions such as computer automated operation, data
acquisition and analysis, data storage, historical data comparison. Patch technology is employed in
both main control panel and micro-step driver, and the state-of-art micro-processor is incorporated
in the circuit design with sound and compact structure. The full range and linearity of each grade
are all calibrated through a PC interface, and the measuring capability and functions of this
instrument have achieved the state-of-art performance.
V,6 series viscometers are designed to measure viscosity resistance and kinetic viscosity of
fluids. They are widely used in viscosity measurement of various liquids, such as greases, paints,
foods, coatings, paperpulps, cosmetics, chemicals, capsules, adhesives and medicines.

1. Major Technical Specifications
Type VIS-1 VIS-2
Measuring
Range (mPa·s) 1-2,000,000 (2 million mPa·s) 0.5-6,000,000 (6 million mPa·s)
Rotary speed
(RPM)
0.3 RPM-100 RPM (Continuously
Variable)
0.1 RPM-200 RPM
(Continuously Variable)
Spindle No. No.1, 2, 3, and 4 spindles are provided (No. 0 spindle is optional)
Precision ± 2.0%
Reproducibility 0.5%
Power Supply Power Supply Adapter ( input 220 V 50 ± 1 Hz, output 15v 1.2A)
2. Structure and Principle
As shown in the figure, the rotation of the spindle and the pointer is driven by the high
micro-stepping motor through the hairspring and shaft. If there is not resistance on spindle caused
by the fluid, the pointer of the hairspring sensor will be in a same position as the pointer of the
stepping motor sensor. In contrast, if there is resistance on spindle caused by the fluid, the torque
will be caused by the hairspring to resist the viscose drag until an equilibrium is reached. At that
time, the output signals are sent to the 16 bit micro-processor via the photoelectric sensor for data
processing. The viscosity of the fluid in mPa.s will be displayed on the light-background LCD.
3. Instrument Configuration
(1)Digital Viscometer: 1 (2)Stand: 1 (3)Spindle protecting frame: 1
(4)Power Supply Adapter: 1 (5)Spindle (No.1, 2, 3 and 4, one for each) (6)Wrench: 1 (7)Base: 1
Optional:
(1)No. 0 spindle (for the determination of ultra low viscosity ) (2)RTD Temperature Probe
(3)VIS data acquisition and programmable control analysis custom software (4)Dedicated Printer
(5) Dedicated device for measurement in small quantity (6)Remote control
4. Installation (refer to assembly diagram and follow the procedure
16 bit micro-processor LCD display
Steppingmotor
Sensor pointer of the motor
Hairspring sensor pointer
Tested fluid
spindle

below)
(1) Take the base, stand, main body, spindle bracket, and protecting frame out of the packing case.
(2) Place the stand into the hole of the base with both the open of the base and the gear rack on the
stand facing the operator. Tighten the nut M12 with a wrench.
(3) Turn the rotary knob on the stand to inspect the up-down clamp for mobility and self-locking.
If the clamp is found too loose or tightened, adjust the screw M4 on the rear of the stand using a
screwdriver to allow the clamp to move up and down. It is preferred to tighten the screw to a
sufficiently degree to prevent the viscometer from falling automatically after being installed.
(4) Install the viscometer on the stand and tighten it with the holding screw. Loose the screw on
the yellow cap below the instrument and remove the cap. Reserve the cap for future use. The
yellow cap is designed to protect the coupling screw and must be in place when the instrument is
left unused for a long-term or is transported.
(5) Adjust the two leveling screws on the base until the bubble level on top of the viscometer is
centered within the circle.
(6) If a RTD temperature probe is available, please connect it to the interface. If a printer is
available, please connect it to the RS232 interface.
(7) Be sure that the power switch of the viscometer is at "OFF" position. Turn the power on.
5. Function of Keys
(reset) Restart the application
and stop the motor (print) Select print function
(speed) Select motor speed (measure)
(run)
Start measuring/running
program
(spindle) spindle selection, the
maximum viscosity can
be measured at current
rotary speed using
selected spindle may be
learn
TAB


Digit place shifting key Increase value
(select)
(display)
Switch displays of
viscosity, torque,
shearing rate, shearing
stress
Decrease value
6. Introduction of Screen Displays
The type of the instrument will be displayed on the screen once the instrument is turned on or the
reset key is pressed.
WELCOME TO USE
VIS-2+PRO
VIS-2+PRO represents the instrument type. After about 3 seconds, the following screen
appears:
20.0 ℃60.0 RPM
45.7% 6000.0cP
20.0℃indicates the temperature of the RTD temperature probe (℃). SP 4 stands for No. 4
spindle, SP 0 stands for No. 0 spindle, SP 1 stands for No. 1 spindle，… and so on. 60.0 RPM

indicates the current rotary speed of the motor in RPMs. 6000.0 cP indicates the maximum
viscosity that can be measured at current rotary speed using the selected spindle (in cPs).
Press the measure key, 3214.5 cP displayed on the screen is the viscosity measured under current
rotary speed using the selected spindle. Press select/display key, SR 3.15 displayed indicates the
shear rate in 1/second；SS 19.8 indicates the shearing stress in dynec/cm2. 45.7 % indicates the
percent scale, also known as torque. Normal values of percent scales are those fall in the range
between 10％-90％. Failure to fall into such range will trigger a warning of the viscometer to
remind user to change rotary speed and spindle.
7. Procedure
(1) Install the viscometer according to "4. installation".
(2) Attach the spindle protecting frame on the viscometer (turn rightward to attach the frame,
leftward to dismount it).
(3) Screw the selected spindle into the coupling screw (turn rightward to attach the spindle,
leftward to dismount it).
(4) Turn the power on, the stepping motor will come into operation.
(5) Input the code no. of the selected spindle: Pressing the spindle key once results in
corresponding change of the code no. displayed on the screen. The spindle no. will rotate in the
sequence of 1→2→3→4→0→. When the selected spindle no. is displayed on the screen, the input
is completed.
(6) Select the rotary speed: press the rotary speed key, the screen will display " 060.0 RPM current
rotary speed" with flashing on the character "6", then the tens digit of the rotary speed can be set
through pressing the increase value key or decrease value key; Then the flashing digit can be
shifted to ones place and the first decimal place and the values can be set in the same way as tens
place. After the rotary speed has been set, press the rotary speed key to confirm.
(7) Rotate the up-down knob of the stand to lower the viscometer slowly and immerse the spindle
immerse in the tested fluid gradually, until the mark on the spindle is flush with the fluid level.
Adjust the position until it is level.
(8)Press the measure key to start the stepping motor. The viscosity value and percentage scale at
the current spindle, rotation speed can be determined simultaneously after an appropriate period.
(9)If the replacement of spindle is necessary during measurement, the reset key can be pressed to
stop the motor and leave the viscometer power uninterrupted. After the spindle is replaced, the
measurement can be resumed by repeating above paragraphs 6 to 8.
(10) Printing:
a: Printing interval setting function can be selected by pressing the print key prior to viscosity
measurement: Press print key, then "S:00:05" will appear on the upper right of the screen. The
printing time setting can be changed by the shift key and +/- key. Press the print key to confirm
after the printing time has been set; S:00:05 means printing once every 5 seconds; 00:10 means
printing once every 10 seconds;…05:00 means printing once every 5 minutes, and the like；
b: Connect the printer and press the measure key to begin viscosity measurement. Printing can be
started or stopped by pressing the printing key. Press the printing key once, "on" will be printed,
indicating the printing has been started according to the set interval; press the printing key again,
"off" will be printed, indicating the printing is ended.
8. Over range

Display of over range will appear on the screen when the current rotary speed and current
spindle measuring range are exceeded, while a warning beep will be emitted. When the torque
exceeds 100%，the readings of percentage, viscosity, shear rate, shearing stress will all be EEEE.
9. Measurement of sample with unknown viscosity
(1)General principles of measurement: select small spindle (No. 3 and 4) and low rotary speed for
high viscosity samples and large spindle (No. 1 and 2) and high rotary speed for high viscosity
samples. For each measured percentage scale (torque ), normal values are those fall in the range
between 10％-90％, and the viscosity value measured within this range is valid.
(2) Estimate the approximate viscosity range of tested samples first, then select a small spindle
and a low rotary speed for high viscosity samples, and select a large spindle and a rapid rotary
speed for low viscosity samples. The selection of a spindle usually precede that of an appropriate
rotary speed. For example, when the spindle SP is No. 1 and the rotary speed is 60 RPM, the full
range of 100mPa.s will be displayed on the screen immediately; when the rotary speed is adjusted
to 6 RPM, the full range will be 1000mPa.s.
(3) If the viscosity of the tested sample can not be estimated, it shall be set to higher viscosity. Try
spindles from small to large and rotary speeds from low to high. Then, the rationality of the
spindle and the rotary speed selection will be determined according to the percent scale (torque)
for each measurement. The percent scale must be within the normal range of 10％-90％, and a
failure to fall into such range will trigger a warning of the viscometer to remind user to change
rotary speed and spindle. Be sure that the spindle No. “SP” has been modified according to the
selected spindle after the spindle is replaced.
10. Precautions
(1) Give special attention in spindle attaching and dismounting. The spindle shall be attached or
dismounted with the coupling screw lifted slightly. Do not apply excess force. The spindle shall
not be subjected to transverse stress to avoid the bending of the spindle.
(2) Please do not place a viscometer on the side or upside down.
(3) The coupling face between the screw and the spindle, as well as the thread shall be kept clean;
otherwise the vibration of the spindle will be affected.
(4) Hold the viscometer in hand when move it up or down, to prevent the viscometer from
dropping under the gravity.
(5) Input the new spindle code in time after the spindle has been replaced. The replaced spindle
shall be cleaned ( wipe up) in time and be put back into the spindle bracket. Do not carry out
cleaning with the spindle left in the instrument.
(6) Please clean the spindle and the protecting frame in time when the tested fluid is replaced, to
avoid the measurement error resulted from the mixed fluids.
(7) Any spindle is exclusive for a given instrument, do not confuse the spindles of several
instruments.
(8) Do not disassemble and adjust instrument parts wantonly.
(9) The instrument shall be handled and transported in the packing container with the yellow cap
on the coupling screw and the screw tightened.
(10) Do not leave the instrument running for a long time without liquid after the spindle is
attached, to avoid the damage of the tip.

(11) There are many kinds of "non-Newtonian fluid" among suspensions, emulsions, polymers and
other high viscosity fluids, the viscosity of which varies with conditions such as shear rate and
time. Therefore, existence of inconsistent test from different spindles, rotary speeds and time is a
normal phenomenon instead of instrumental error. The spindle, rotary speed and time shall be
specified for determination of non-Newtonian fluids.
(12) It will be useful for more precise values to achieve:
• precise control of the tested fluid temperature.
• adequate immersion time of the spindle in the tested fluid to allow the consistent temperature
between them.
• keeping of fluid homogeneity.
• the alignment of spindle to the centre of vessel during the test, while the spindle protecting frame
must be mounted.
• ensuring the cleanness and vibration of the spindle.
• shutting down for a short time when the measurement is immediately switched from a high
rotary speed determination to a slow rotary speed one, or spending somewhat longer period in the
slow rotary speed determination, in order to overcome the error due to the rotary inertia of the
fluid.
• Using No.1 spindle for low viscosity and No.4 spindle for high viscosity.
• Spending relatively long time for viscosity measurements at low speed.
• Timely checking and adjustment of the level after the position of the viscometer is changed by
rotating the up-down clamp as applicable when the spindle or tested fluid are replaced.

Assembly diagram
RS232 interface
Main body
Power socket
switch
Coupling screw
Yellow cap
Y
ellow cap
Protecting frame
Temperature probe clamp
Leveling bolt
Base
N
ut M12
Stand
Holding screw
Screw M4
KnobKnob
Temperature probe interface
Spindle kit
N
o.1 No.2 No.3 No.4
Fluid level
Mark

PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] [email protected]
MRC.VER.01-3.12
Operation Manual for
Professional, Rotational Viscometer
VIS-HBDV1P