力辰PV系列膏体粘度计说明书（英文版）.pdf - 第6页

5 secure it with a socket wrench; next, insert the viscometer head crossbar i nto the fixed circular hole of the head to keep the head approxi mately level, and turn the fixed handwheel to lock it in place, preventing th…

The rear layout of the instrument is shown in the figure (without the rotor installed):

1. RS232 interface, printer interface 2. Power switch 3. Temperature sensor probe interface

4. Horizontal bar interface 5. Power cord socket 6. Protective frame mounting hole

7. Yellow protective cap

IV. Installation and Use

1. Selection of the work environment

(1) The studio shall be kept clean and dry;

(2) The instrument should be placed away from sources of electromagnetic interference;

(3) The use of instruments shall be prohibited in areas posing an explosion hazard;

(4) Do not operate the instrument for extended periods in environments with high humidity or high

dust content.

2. Installation

(1) Open the packaging box and the instrument storage box, then, in accordance with the inventory

list provided in the appendix of this manual, conduct an inventory and inspection of all instrument

components;

(2) The instrument shall be installed on a workbench free of corrosive gases, strong electromagnetic

interference, and vibration;

(3) Insert the column into the corresponding hole of the main unit base; first, use a hex key to tighten

the bolts on the column (connected to the bottom of the base) to secure the column, then tighten the

screws on the front of the base to fix the column housing;

(4) Rotate the lifting handwheel to move the device up and down until it reaches its highest position.

If the lifting handwheel feels too tight or too loose during rotation, adjust the locking screw located

in front of the lifting base; it is advisable to tighten it slightly to prevent the viscometer head from

falling due to its own weight;

(5) Connect the head crossbar to the crossbar interface located behind the viscometer head, then

secure it with a socket wrench; next, insert the viscometer head crossbar into the fixed circular hole

of the head to keep the head approximately level, and turn the fixed handwheel to lock it in place,

preventing the head from tipping over;

(6) Adjust the level adjustment screws on the main instrument base so that the level bubble on the

viscometer head is centered;

(7) Loosen and remove the yellow protective cap located beneath the viscometer head. Attach the

connector to the rotor connection point, then select an appropriate rotor and insert it into the

connector, securing it in place.

Pay attention to:

① When loading or unloading the rotor, operate with care: gently lift the connector at the lower end

of the instrument upward before disassembly or assembly; avoid applying excessive force and

prevent the rotor from experiencing lateral stress to prevent bending of the rotor;

② After installing the rotor, do not rotate it in the absence of liquid to avoid damaging the rotor tip

and the bearings;

③ Before measurement, estimate the viscosity range of the liquid to be measured, and then select an

appropriate rotor and operating speed from the range table. If the approximate viscosity of the liquid

cannot be estimated, it should be treated as having high viscosity. In such cases, select rotors in

ascending order of size (using rotor numbers in descending order) and operating speeds in ascending

order.

(8) Check whether the level bubble on the viscometer head is centered. If the instrument is not level,

adjust the level adjustment screw on the main instrument base;

(9) Insert the power plug into the power socket, connect the power supply to the back of the

instrument, and complete the installation of the entire unit.

3.Make use of

(1) User Interface (Button Functions)

Order number

Show

Explain

Stop/return

Pause/Resume across all interfaces

Print/output

Data Print/Output Key

preserve

Once the measurement is complete, the data will be saved.

◀

Left arrow key

▲

Move the cursor up on the function interface or main menu, or

increment the set parameter values.

√

Confirm key

▶

Right arrow key

▼

Navigate the functional interface, move the main menu cursor

downward, or decrease the set parameter values.

(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