Operation method:
1. Speed ​​measurement:
The instrument is a digital tachometer that can measure speed from 30 rpm to 30000 rpm.
Select the cursor to Rpm_Test, then press the "Execute" button to enter the speed measurement.
Attach a good photoelectric sign on the shaft. Wipe the surface of the shaft with black paint or black tape. Apply a black sticker on it. The width of the mark should be determined according to the diameter of the shaft, and the large diameter shaft should be wider.
The magnetic sensor is used to fix the photoelectric sensor above the mark with a gap of about 1cm to 25cm.
Align the photoelectric sensor with the cursor on the rotating rotor. Observe the orange light emitting tube (action indicator) on the photoelectric sensor. The action indicator should keep flashing when receiving the reflected signal. When the distance between the photoelectric sensor and the rotor is far, the sensitivity knob on the photoelectric sensor should be adjusted to the Max direction. When the distance between the photoelectric sensor and the rotor is close, the sensitivity knob should be adjusted to the Min direction. In short, it is necessary to keep the action indicator flashing constantly. At this time, there is a relatively stable rotation speed display on the screen.
2. Vibration measurement:
The instrument is also a vibration measuring instrument, which can measure the displacement value of the measured point. The unit of vibration amplitude is um peak-to-peak value.
Move the menu selection cursor to Vib._Test, and then press the "Execute" button to enter the vibration measurement state.
Attach the two speed sensors to the measured point with a magnet holder or with screws or other means. Use two cables to connect the sensor to the vibration input A or B of the rear panel of the main unit. If the two-way vibration signal is measured, the input line of the sensor should be connected to terminal A and terminal B. If measuring a vibration signal, the input line of the sensor must be connected to the A terminal, and cannot be connected to the B terminal. Otherwise, the measurement result is not displayed.
When the instrument is used for vibration measurement, no photoelectric sensor is required.
The display will appear:
A: B: A, B means two channels
ΣA: u ΣB: u ΣA, ΣB mean two channel measurement results
If you need to lock or release the reading, press the Hold key. When "*" appears at the upper right of the screen, the digits are locked. Pressing the "Hold" key again releases the digits.
3.: Balance measurement:
Dynamic balance measurement is the main function of this instrument. It also uses the test weight method to measure the influence coefficient and calculate the single calibration point single correction plane.
Double correction of plane permanent weights with double measuring points, or the ability to know the influence coefficient directly based on the measured original vibration. Can be measured while counting.
Install the photoelectric sensor. Optoelectronic signs are made clear and black and white with neat edges. See the requirements for speed measurement in detail.
Install the sensor. Connect the cable, balance the A channel input on one side, and balance the A and B channel inputs on both sides. For details, see the requirements in vibration measurement.
Move the selection cursor to Sync_Test and press “Execute†to enter the dynamic balance measurement state.
The display will appear:
===Plance===
→Single Point single correction plane, single measurement point
Double Points double correction plane, double measurement point
Qint exit
If the object to be balanced has a narrow width, a large diameter, or a single-end supported structure, it can be balanced on one side. For a double-end supported rotating structure, the double-sided balance method should be used to achieve the force balance and the balance of the couple.
I. Doing a one-sided balance with the weighting method:
The trial weight method must be used for the first time to balance a single-sided balanced object.
Select the cursor to Single Point, then press the "Execute" button to enter the single-sided measurement.
The display will appear:
===Function===
→Balance dynamic balance measurement
Calculate Balance Calculation
Quit exit
Select Cursor to Balance, then press “Execute†to enter single-sided balancing measurement.
The display will appear:
===Band Width===
→Wide wideband (wide filter bandwidth, fast response)
Narrow narrow band (narrow filter bandwidth, slow response, use in high interference situations)
According to different test environments, different bandwidth types are used, and narrow bands are used as far as possible to facilitate reading stability. Use "∧" "∨"
Select one of the keys. Press the "Execute" button to approve.
The display will appear:
===Testing===
→ Tw._Test Selective weight method for dynamic balance
Coe._Test uses impact coefficient method for dynamic balance
F._Analysis Harmonic Analysis
Select the cursor to Tw._Test, then press the "Execute" button to enter the trial weight method for dynamic balance measurement.
The display will appear:
<>
AO original vibration value
Will be Test
Press any Key! Press any key to start sampling measurement
Press the "Execute" button to make the original measurement.
Example: If a balanced device shows online measurement results:
A: Actual operating speed of 1800 Rpm device under test
ΣA =124 u Comprehensive vibration quantity including fundamental and harmonic components
A = 105 u main speed produces vibration and both fundamental components
Φa = 126° The phase angle indicates the phase angle of the pulse front of the photoelectric signal and the positive peak of the displacement signal of the vibration sensor.
Please note that the reading of speed Rpm should be stable and in accordance with the actual operating speed. Otherwise it is necessary to adjust the distance and position of the photoelectric sensor. Dynamic balance can only eliminate the fundamental component of vibration and cannot eliminate harmonic components of vibration. In other words, the dynamic balance measurement makes sense only when the fundamental component is much larger than the harmonic component.
Use the “Hold†key to lock the reading display and press the “HOLD†key again to re-measure the display. When it is confirmed that the latched data is reliable, press the "Execute" key to approve.
The display will appear:
<>
Please add P Please try P
Trial weight added to correction plane
Press any Key! Please press any key
Stop and try again. Find a test piece with a known weight P and add it to the measured surface. The size of the test weight depends on the amount of unbalance. Phase angle definition: The front edge of the photoelectric sign is zero degree, and the phase is calculated by the reverse rotation of the actual rotation direction of the rotation axis.
Assume now that the trial weight P is 100 grams, and the position of the reversed steering is 45 degrees from the photoelectric sign.
The display will appear:
<>
A1 plus test after vibration value
Will be Test
Press any Key! Press any key to start measurement
Press "Execute" button to perform vibration measurement after heavier.
The measurement result shows:
A: 1800 Rpm
ΣA =90 u
A = 84.6 u
Ф= 243°
Through the additional test, the amplitude value (A) and the phase (Ф) of the amplitude and the phase angle of the original vibration are changed, indicating that the trial weight method is successful.
Use the “hold†key to latch the test data result and press the “execute†key to approve.
The display will appear:
===Inputp===
P = 000.000 g The weight of the test weight
ФP = 000.000 ° Try heavy phase
Use the “+1â€, “-1â€, “∧â€, “∨â€, “<â€, “>†keys to type the weight and degree of the test weight P, respectively, such as the weight 100g phase 45°. When using the "∨" key to move the cursor to the g position, you can use the "+1" key to change the amount just as Kg, or use the "-1" key to change back to g. Then use the "Execute" button to approve.
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Cr |
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Other |
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