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PCE-RVI 2
Digital Display Viscometer
Instruction Manual
Digital Viscometer
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Dear users:
Thank you very much for choosing our viscometer. In order to make sure you can use this
product properly, please read the instructions carefully before using it.
Catalogue
I. Work principle and application ................................................................................... 3
II. Main technical performance ...................................................................................... 3
III. Use environmental conditions .................................................................................. 4
IV. Instrument installation .............................................................................................. 4
V. Operation ................................................................................................................... 4
VI. Instrument operation interface description ............................................................. 5
VII. Matters needing attention ....................................................................................... 7
VIII. Viscometer package ................................................................................................ 8
IX. Options ...................................................................................................................... 8
X. Installation procedure and application method of No. 0 rotor……………………………….9
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I. Working principle and application
measuring
range
1mPa.S - 100,000mPa.S,when less than 15CP, use the No. 0 rotor
test
Display
accuracy
0.01mpa.s
measurement
accuracy
Rotor
specification
1#, 2#, 3#, 4#，Four rotors (No. 0 rotors are optional)
speed
6, 12, 30, 60 RPM/min
Outline size
95*130*155 （Excluding base）
Net weight
2kg （Excluding base）
This series has high performance stepper motor and driver, according to the procedures
set accurately and smoothly running, the motor drive torque sensor by constant speed
rotation of the rotor. When the rotor is in the measured by liquid viscous resistance, and
force feedback to the torque sensor, and then after the corresponding internal processing
and operation, the viscosity data can be displayed the measured liquid to the LCD screen.
In terms of the use of the instrument operation, the instrument has a series of
measurements for the full-scale value 100% range overflow function, alarm display,
automatic scanning function, the user can rely on these, intuitive, fast, and accurate rotor
speed combinations available to choose the right, and can save the test conditions to
determine, convenient and use the fast out of the testing process in the production of the
day.
This series of instruments are widely used in solvent adhesives, latex, biochemical
products, paints, coatings, cosmetics, inks, pulp, food and other industries.
II. Main technical performance
1. PCE-RVI 2
5S：±2%（Full scale）
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III. Use environmental conditions
Ambient temperature: 5 degrees ~35 degrees Celsius (recommended using ambient
temperature of about 20 degrees)
Relative humidity: less than 80%
IV. Instrument installation
Power supply: AC100~240v (50/60Hz)
There is no strong electromagnetic interference near the instrument, no corrosive gas, no
violent vibration.
1. Open the box to take out a lifting column, a connecting rod, viscometer host, power
adapter and other components. The lifting column is inserted into the base hole nut and
tight (Note: the lifting knob on the right), then connect the screw rod on the host, and
then down the plane milling insert into the mounting hole below after the host, the host
and the fixing rod connecting and fastening screw with the floor under the inner six angle
screw mounting hole. The connecting rod is inserted into the host installed in the lifting
slider, right after fasten the knob.
2. The lifting knob is adjusted to the proper lifting tightness, the host does not
automatically fall, and when the lifting handle moderate damping is appropriate, such as
too loose or too tight can be adjusted by adjusting the screw lifting slider ahead.
3. By adjusting the three horizontal feet under the base, the instrument's front bubble is in
the center of the black circle
4. Remove the protective cap under the instrument. Switch on the instrument power.
After the assembly, the shape is shown below.
V. Operation
1. The sample shall be poured into a round flat container of no less than 60mm diameter.
(0# rotor or a small sample adapter shall be used with a special container).
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2. The rotor frame is arranged to protect the instrument beneath the silver shell. (The
：
LCD: used to display
Running status
indicator
Panel operation area
installation method: upper protective frame two hole is sheathed in the lower casing on
the fixed shaft, then screw counterclockwise can).
3. Select the applicable rotor, turn counterclockwise to the lower rotating shaft joint.
4. Twist the lifting knob, so that the instrument slowly decline, the rotor immersed in the
sample, and the liquid level line (rotor rod groove or convex line) and the measured
liquid surface to keep flat.
5. Check again whether the instrument is horizontal in front of the instrument.
Note: when loading and unloading the rotor, do not drag the shaft joint downward
or crosswise so as to avoid damage to the internal structure
During the test, the ambient temperature must be constant to ensure the stability
and accuracy of the measurements
VI. Instrument operation interface description
measurement
information
After the boot, the instrument first displays the instrument type information and waits for
3 seconds to get into the test state. At this point, there are 4 lines in the LCD screen:
rotor
speed： Current speed;
range： The corresponding rotor, the full scale of the speed;
Time, temperature: Preset automatic stop time, the current temperature
(Because the machine has the power off memory function, that is, set the rotor speed,
preset time will continue to remain in the page after the power is switched on again, so as
to facilitate the user's operation.)
Current rotor number;
measured by the temperature probe (if the temperature
is not checked, the probe is shown as "0")
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viscosity value of the
percentage of the full scale
Figure 1
Panel operation instructions
There are 7 buttons and a LED indicator light in the panel operation area:
Rotor / rev: Select rotor speed;
Start / stop: Control the operation of the instrument and stop;
▲/▼: Adjust the corresponding parameters;
Confirm: Validation of parameter values and options;
Scan / timing: Enable auto scan function and timing auto stop function;
Print: Print the measured data (you need to connect a dedicated external
printer);
LED indicator light： When the motor is in operation, the indicator light is on, the
motor stop lamp is extinguished, and when the speed is
low, the operation state of the instrument can be
understood
After you select the right rotor / rpm, press start to start the test and start the test screen.
See Figure 2.
The viscosity of the sample
at present
When the viscosity data of the tested samples displayed on the screen, do not rush to read
the viscosity, should make full circle after the first 3~5 rotary instrument to observe the
(Torqu e angle percentage): the
value
Figure 2
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bottom line of the "torque" value, the value is only between 15%~80% is effective, the
Speed / rotor
No.1
No.2
No.3
No.4
No.0
Full scale value mPa.s
60 r/min
100
500
2000
10000
10
30 r/min
200
1000
4000
20000
20
12 r/min
500
2500
10000
50000
50
6 r/min
1000
5000
20000
100000
100
3 r/min
2000
10000
40000
200000
200
1.5 r/min
4000
20000
80000
400000
400
0.6 r/min
10000
50000
200000
1000000
1000
0.3 r/min
20000
100000
400000
2000000
2000
time to read the viscosity value. If the value is less than the "torque" 15% or more than
80%, is regarded as the current range selection is not appropriate, should switch the other
ranges (specific operation way: "torque" value is less than 15% belong to the range
selection is too large, need to reduce the range, can improve the speed or change with the
large volume of rotor; torque values greater than 80% belong to the range is too small,
the need to increase range, can reduce or replace the small volume of the rotor speed).
This instrument has the full range of overflow alarm function, when the torque value is
greater than 80%, the viscosity value is shown as "EEEEE", and with the alarm buzzer,
then switch to a small range to be tested.
For measuring the viscosity of the sample, should first estimate the sample viscosity
value. Then select several groups corresponding to the rotor speed, combined to make the
measurement. When not able to estimate roughly viscosity of the fluid to be measured
value, should assume that the sample with high viscosity value, from small to large
(volume) of the rotor and from slow to fast the speed of testing.
The principle of viscosity measurement is that:
The high viscosity fluid uses a small (volume) rotor with slow speed;
Low viscosity fluids use large (volume) rotors, fast and fast
The test range corresponding to the rotor and the speed of the combination：
VII. Matters needing attention
Because the viscosity is a function of temperature, when the instrument is working at
normal temperature, the temperature fluctuation should be controlled at + 0.1, otherwise
it will affect the accuracy of measurement
1. Keep the rotor surface clean
2. Because the spring has certain linear measurement, please note that the numerical
torque percentage is between 15%-80%, when the high percentage of numerical angle,
torque and viscosity will overflow the sign "EEEEE", this time should replace or change
the rotor speed, and otherwise it will affect the accuracy of the measurement.
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For example: NDJ-8S type test specimen with one rotor, 60 rpm speed combination test,
Serial
number
Name
Number
1
Viscometer host
1
2
Main connecting rod
1
3
The lifting rod and the lifting slider
1 4 Tripod base
1
5
Rotor protection frame
1 6 rotor（1, 2, 3, 4）
1 7 power adapter
1 8 instruction manual
1 9 Certificate
1
10
Warranty card
1
11
Inner hexagon spanner
1
Serial number
Name
Number
Remarks
Display the current temperature of
(temperature range 0 to 100
Used to measure ultra-low viscosity
samples below 15mPa.S
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Micro printer
1
Direct print data
torque per cent show "EEEEE", it should reduce speed. As has been reduced to "0.3
RPM", the torque per cent still shows "ERROR"; it should be selected smaller the rotor
(surface area) measurement test. As test samples in the same rotor case, numerical torque
percentage for different speeds are between 15%~~80%. It takes in between the torque
per cent is close to 50% for the standard. Other types of testing and so on.
3. Loading and unloading rotor should be careful operation, the universal joint micro
upward, not excessive force. Do not let the rotor transverse force, must not drop the rotor,
so as not to damage the shaft tip
4. Universal joint head should be kept clean
5. When the instrument falls slowly, it is better to hold it with your hands to avoid
vibration and damage the axle center
6. When the instrument is moving or moving, the universal connector shall be provided
with a protective cap
7. suspension, emulsion, and polymers and other high viscosity liquids in many are "non
Newton liquid, its apparent viscosity change with shear rate and time, s o at di fferent ro to r
speed and time determination, the results are not consistent is normal, is measured (such
as non Newtonian fluid even in the same rotor, different speeds; the results will be
decided by the nature of the deviation) are fluid, is not the instrument testing problems.
VIII. Viscometer package
IX. Options
1
2
Temperature probe 1
No. 0 rotor 1
the fluid to be measured
℃）
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X. Installation procedur e and application method of No. 0 rotor
1. The construction of No. 0 rotor is shown in Figure 3. Its components can only be used
for rotor No. 0, and other rotor tests are not applicable. The operation of No. 0 rotor must
use all the components as shown below together.
2. First install the 0# rotor on the rotor connecting rod (installed on rotating in the
counterclockwise direction).
3. Then from bottom to top put the fixing sleeve sheathed on the bottom of the instrument
cylinder (Note: don't touch the 0# rotor) and use the sleeve fixing screw for tightening.
4. Pour the fluid into the test cylinder about 18 to 20ml.
Figure 3 Figure 4
Note: No. 0 rotor shall not be used when no fluid is loaded. No rotor protection
frame shall be used when the No. 0 rotor is in use.
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