力辰PV系列膏体粘度计说明书（英文版）.pdf - 第8页

7 ⑤ Use the ◀ or ▶ keys to navigate through the menu; once the measurem ent it em has been selected, press the OK key to proceed, and t he i nterface will then display as shown in Figure 2. The cursor will then be positi…

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Order number
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Stop/return
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Print/output
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preserve
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◀
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▲
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√
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▶
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▼
(2) Mode of operation
① Prepare the liquid to be measured by placing it into a measurement vessel;
② Accurately control the temperature of the liquid under test (if used in conjunction with a
temperature-controlled bath);
③ Slowly adjust the up/down knob to change the height of the rotor within the test liquid until the
liquid indicator mark on the rotor (center of the groove) is level with the liquid surface. Then, insert
the temperature probe into the test liquid.
Note: The following points, when followed, will enable the measurement of viscosity with relatively
high precision.
1) Precisely control the temperature of the liquid being tested;
2) Immerse the rotor in the test liquid for a sufficiently extended period while maintaining a constant
temperature, ensuring that the rotor temperature matches that of the test liquid;
3) Ensure the homogeneity of the analyte;
4) During measurement, position the rotor as centrally as possible within the container;
5) Prevent bubbles from adhering to the underside of the rotor when it is immersed in the liquid;
6) Ensure the rotor remains clean.
④ Turn on the power switch on the back of the instrument; the device will then enter a standby state,
and the display screen will appear as shown in Figure 1;
Figure 1
7
⑤
Use the ◀ or ▶ keys to navigate through the menu; once the measurement item has been
selected, press the OK key to proceed, and the interface will then display as shown in Figure 2. The
cursor will then be positioned at TF#, and you can press the ▲ or ▼ keys to select the desired rotor
number;
Figure 2
⑥
Use the ◀ or ▶ keys to switch to the rotational speed position, and the cursor will then be
positioned at 200.0 rpm as shown in Figure 3;
Figure 3
⑦
Use the ▲ or ▼ keys to select the desired rotational speed. After selecting the rotor type and
speed setting, press the OK button; the rotor will then begin to rotate, the instrument will start
measurement, and the screen will display the result as shown in Figure 4.
Pay attention to:
1) After selecting the rotor speed, the measurement range displayed in the lower-right corner of the
screen represents the maximum measurable value at the current rotor speed;
2) The instrument features an over-range alarm function; if the measured value exceeds 100%, the
display will show "----". To ensure accuracy, when performing measurements, the percentage reading
within the measurement range should be maintained between 10% and 90% (if the measured value
falls below 10% or exceeds 90%, the lower percentage bar will turn red).
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Figure 4
⑧
If you need to set a timer, return to the main menu; press the ◀ or ▶ keys to navigate to the
Settings Center, then press the OK key to enter the Settings Center. Press the ▼ key to open the
drop-down menu, select "7. Timer On/Off," and press OK to proceed. Subsequently, use the ▲ or ▼
keys to toggle the timer on/off, press OK to select the desired mode, and press the back key to exit.
Once back at the measurement item interface, select the sub-parameter "rotational speed," and you
can then configure the timed measurement (Note: If the specified timer duration is shorter than the
minimum measurement duration, the timer duration will be automatically set to the minimum
measurement duration);
⑨ Press the pause button during measurement to halt the instrument; if you then press the confirm
button, the instrument will resume measurement using the previously set rotor number, rotational
speed, and timing duration. To change the rotor or rotational speed, you must first press the return
button;
⑩
Return to the main menu interface as shown in Figure 1; select the viscosity-temperature curve
with the cursor, then press the OK button to enter the viscosity-temperature curve measurement
mode, as shown in Figure 5. The settings for the rotor, rotational speed, and timing are the same as
those for the measurement parameters (where V represents the viscosity value, T represents the
temperature, and t represents the time);
Figure 5
⑪ To save the measurement results, once the measured values have stabilized, simply press the
"Save" button; a pop-up window will appear, indicating that the save operation was successful. To
view the results, return to the main menu interface (as shown in Figure 1), select "Query Records"