In industrial production, rotating machinery is everywhere, from large steam turbines and generators to pumps, fans and compressors, they are the “heart” of modern industry. The forward and reverse speed monitoring of these equipment is crucial to ensure equipment safety, optimize operating efficiency and prevent failures. Traditional tachometers can often only measure one-way speed and cannot meet the precise monitoring needs of forward and reverse speed under complex working conditions. SZC-04B forward and reverse speed monitor, with its excellent performance and innovative technology, came into being. This article will deeply explore the forward and reverse signal acquisition accuracy test method of SZC-04B, and reveal to you how this “guardian” can achieve accurate monitoring and protect rotation safety.

I. SZC-04B: “Weapon” for forward and reverse speed monitoring

SZC-04B forward and reverse speed meter is an intelligent instrument specially designed for forward and reverse speed monitoring of rotating machinery. It adopts advanced microprocessor technology and digital signal processing technology, and has the following remarkable features:

1. Bidirectional speed measurement: SZC-04B can simultaneously measure the forward and reverse speeds of rotating machinery to meet the monitoring needs under various working conditions.

2. High precision: High-precision signal acquisition circuit and advanced algorithm are adopted to ensure the accuracy of speed measurement.

3. Wide range: It has a wide speed measurement range and can adapt to equipment with different speeds.

4. Strong anti-interference ability: It adopts a variety of anti-interference measures, such as photoelectric isolation, digital filtering, etc., to ensure reliable operation in harsh industrial environments.

5. Easy to install and maintain: Compact structure, easy installation, simple operation and convenient maintenance.

6. Intelligent function: It has functions such as overspeed alarm, zero speed alarm, fault self-diagnosis, etc., which improves the safety of the equipment.

SZC-04B is usually used in conjunction with magnetoelectric speed sensors, Hall sensors or proximity switches, etc., to receive the pulse signal generated by the sensor, calculate the speed value through internal circuits and algorithms, and display it on the panel or transmit it to the host computer through the output interface.

II. Forward and reverse signal acquisition accuracy test: rigorous verification to ensure reliability

In order to ensure that rotation speed monitor SZC-04B can accurately measure the forward and reverse speeds, it is necessary to conduct rigorous testing on the accuracy of its forward and reverse signal acquisition. The test methods mainly include laboratory simulation tests and on-site actual tests.

1. Laboratory simulation test:

• Test equipment: standard signal generator, high-precision digital oscilloscope, speed calibrator, SZC-04B monitor, simulated load (such as adjustable resistance box).

• Test principle: Use a standard signal generator to simulate the pulse signal output by the speed sensor, and simulate the forward and reverse states respectively. By changing the frequency and phase of the signal generator, different speeds and rotation directions are simulated. SZC-04B receives the analog signal and calculates the speed value, compares it with the speed value set by the signal generator, and calculates the error.

• Data analysis: Statistical analysis of the test data, calculation of average error, maximum error, standard deviation and other indicators, and evaluation of the accuracy and stability of SZC-04B. Draw an error curve and analyze the trend of error changes with speed.

2. Actual test on site:

• Test steps:

a. Connect SZC-04B to the speed sensor correctly and install it on the equipment.

b. Start the equipment and make it rotate forward and reverse at different speeds.

c. Simultaneously record the speed value displayed by SZC-04B and the speed value measured by the handheld tachometer.

d. Change the working state of the equipment, such as load, temperature, etc., and repeat step 3.

• Data analysis: Compare the measurement results of SZC-04B with the measurement results of the handheld tachometer and calculate the error. Analyze the change of error under different working conditions.

III. Evaluation of test results and analysis of influencing factors

1. Evaluation of test results:

• Accuracy level: According to the test results, calculate the accuracy level of SZC-04B. Generally, the accuracy level of industrial-grade speed monitors is required to be within ±0.5% or ±1%.

• Linearity: Evaluate the linearity of SZC-04B over the entire measurement range, that is, the linear relationship between the output signal and the actual speed.

• Repeatability: Repeat the test multiple times under the same conditions to evaluate the repeatability error of SZC-04B.

• Stability: During long-term operation, observe whether the output of SZC-04B is stable and whether there is drift.

2. Analysis of influencing factors:

• Sensor type and installation: Different types of speed sensors (such as magnetoelectric, Hall, and photoelectric) have different output characteristics, and the installation position and gap will also affect the signal quality.

• Signal interference: Electromagnetic interference, power supply fluctuations, vibration, etc. may affect signal acquisition and processing.

• Ambient temperature: Temperature changes may affect the performance of electronic components and cause measurement errors.

• Signal processing algorithm: The signal processing algorithm inside SZC-04B also has an important impact on measurement accuracy.

IV. Precautions during testing:

1. Safety first: Before conducting any test, make sure that the test environment and equipment are in a safe state. Comply with relevant safety operating procedures.

2. Equipment calibration: The test equipment used (signal generator, oscilloscope, speed calibrator, etc.) must be calibrated and within the calibration validity period.

3. Reliable connection: Ensure that the connection between all devices is firm and reliable to avoid poor contact or false connection.

4. Signal matching: The output signal of the signal generator should match the input requirements of SZC-04B, including signal type, amplitude, frequency range, etc.

5. Interference shielding: Minimize electromagnetic interference in the test environment, use shielded cables, and ensure that the equipment is well grounded.

6. Stable preheating: Before testing, let SZC-04B and the test equipment preheat for a period of time to achieve a stable working state.

7. Multiple measurements: In order to reduce random errors, each test point should be measured multiple times, and the average value should be taken as the final result.

8. Data recording: Record all parameter settings, measurement data and observed phenomena during the test in detail.

9. Environmental records: Record the test environment temperature. If the test time is long, record the temperature change.

SZC-04B forward and reverse speed speed monitor, with its excellent performance and reliable quality, has become the “guardian” of the safe operation of rotating machinery. Through strict forward and reverse signal acquisition accuracy tests, it can ensure that it can provide accurate speed monitoring under various working conditions, escorting industrial production.

When looking for high-quality, reliable rotational speed meters, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:
E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229
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