There are several key points we need to master regarding the precautions for use of toxic and harmful gas detectors:
1. Pay attention to regular calibration and testing:
Toxic and harmful gas detectors, like other analytical and detection instruments, use a relative comparison method for measurement: first, calibrate the instrument with a zero gas and a standard concentration gas, obtain a standard curve, and store it in the instrument. During measurement, the instrument compares the electrical signal generated by the concentration of the gas to be measured with the electrical signal of the standard concentration to calculate the accurate gas concentration value. Therefore, zeroing the instrument at any time and regularly calibrating the instrument are essential tasks to ensure accurate measurement. It should be noted that many gas detectors currently have replaceable detection sensors, but this does not mean that a detector can be equipped with different detector probes at any time. Whenever replacing the probe, in addition to requiring a certain sensor activation time, the instrument must also be recalibrated. In addition, it is recommended to perform response testing on the standard gas used in various instruments before use to ensure that the instruments truly provide protection.
2. Attention should be paid to the concentration measurement range of the detection instrument: various toxic and harmful gas detectors have their fixed detection range. Only by completing the measurement within its measurement range can it be guaranteed. Ensure that the instrument accurately performs measurements. However, measuring beyond the measurement range for a long time may cause significant damage to the sensor. For example, if the LEL detector is accidentally used in an environment exceeding 100% LEL, it may completely burn out the sensor. Toxic gas detectors, when used at high concentrations for extended periods of time, can also cause damage. Therefore, if a fixed instrument emits an over limit signal during use, the measurement circuit should be immediately turned off to ensure the safety of the sensor.
