Precautions for Using the Pulse Sound Level Meter and How to Calibrate It
A pulse sound level meter is a universal sound level meter that measures the weighted sound level of an exponential time meter. Practical for measuring noise in various industrial environments and conducting environmental noise surveys. Used for measuring sound levels of environmental, mechanical, transportation, ship, and other noises; Practical for industrial environmental protection, construction, health, teaching and research departments.
Precautions for using pulse sound level meter:
1. The microphone used in the instrument is a precision sensor, please do not collide to avoid membrane damage, and it should be placed properly when not necessary.
2. Attention should be paid to the polarity of the device battery or external power supply, and do not reverse the connection
3. When the instrument is not in use temporarily, the battery should be removed to prevent leakage and damage to the instrument.
4. The instrument should be kept away from high temperature, humidity, sewage, dust, and air or chemical gases with high hydrochloric acid and alkali content, and protected from direct sunlight.
5. Please do not assemble the instrument without authorization. If the instrument is not working properly, it can be sent to a repair unit or factory for inspection.
Sensitivity calibration
To ensure measurement accuracy, calibration should be performed before and after use.
Method: Attach the sound level calibrator to the microphone, turn on the calibration power, read the value, adjust the sensitivity potentiometer of the noise meter, and complete the calibration.
Noise meter - Instructions for use
1. Slow down. The time constant of the meter head is 1000ms, which is generally used to measure steady-state noise, and the measured value is the effective value.
2. Hurry up. The time constant of the meter head is 125ms, which is generally used to measure unstable noise and transportation noise with large fluctuations. Fast gear approaches the human ear's response to sound.
3. Pulse or pulse hold. The rise time of the gauge needle is 35ms, used to measure pulse noise with longer duration, such as punch presses, hammers, etc. The measured value is the maximum effective value.
4. Peak retention. The rise time of the meter needle is less than 20ms. It is used to measure pulse sounds with short duration, such as gun, cannon, and explosion sounds. The measured value is the peak value, that is, the maximum value. Distance measuring instrument, height measuring instrument, laser projection instrument, flow meter, GPS thickness measuring instrument, level instrument, flat panel instrument, waveform recorder, testing fixture, voltage and current recorder, data collector, graphic recorder, flow integrator instrument.
