Portable gas detector, is in the gas storage area for leakage inspection, often used to the tool. Particularly suitable for process handling equipment, piping systems around and into narrow spaces. One-handed operation, the instrument includes a built-in pump and a sampling wand (to pinpoint the exact location of the leak source), and a large character, backlit display ensures that the detected gas concentration can be clearly read in dark and unlit environments.
The sensors of the portable multi-gas detector use a new lightweight sensor module, each sensor module is a composite device containing a sensor, amplifier and memory module. Based on this design, so that each sensor module can be independently calibrated and plug-and-play, such as its installation in a host computer, to the microprocessor to enter the appropriate calibration data, there is no need to make adjustments, and later in the detection of gases, each time the replacement of the sensor does not need to be calibrated again.
Two, handheld gas detector how to use
1, power on: press the "power" button to power on the instrument, the instrument works, the power light is on. Instrument warm-up, the display appears "5, 4, 3, 2, 1" instructions, warm-up is complete, the instrument enters the detection state.
2, self-test: press the "self-test" button, the instrument displays "888", the lights are on, the alarm sound.
3, detection: the gas detector placed in the environment to be measured, when there is a gas leakage, the display figures change, the larger the displayed value indicates that the gas concentration is greater, the display value of the largest place, that is, the gas leakage point.
4, alarm: when the measured gas concentration value reaches the alarm setting value, the red alarm lamp lights up, while the instrument emits a bright alarm tone; when the gas concentration falls below the alarm setting value, the sound and light alarm will be eliminated automatically.
5, fault diagnosis and indication: When the instrument's sensing element has broken or short-circuit phenomenon, the instrument lights up the yellow fault indicator, emits a fault alarm sound, and displays "E ---" at the same time. At this time, the instrument should be turned off and sent for repair.
6, zero: when the gas detector use long, in the clean air, the sensor digital drift, with a small screwdriver with a randomly carried rotating instrument on the right with a "Z" indication of the zero potentiometer, the digital display of "000", zeroing is complete.
Three, portable gas detector operation note
1, to note the use of portable gas detector measurement range:
Any gas detector has a fixed detection range, only in the range to complete the measurement, otherwise the measured results are far below the value of your environment. In addition, a long time in the over-range measurement, will cause damage to the sensor, so that later in the measurement range are unable to get the correct results.
2, pay attention to the use of the gas detector in the sensor life:
Gas detector have a limit of years of use, portable gas detector is no exception, even if it is not often used, there will be aging phenomenon. In general, in the portable gas detector, photoionization detector life is the longest, for about four years; LEL sensor service life is second, can be used for more than three years; electrochemical specific gas sensor life is relatively short, generally in one year to two years; Oxygen sensors can only be used for about a year.
So, you must look at the manual before use, to be used within the validity period of the sensor, if found to be expired, need to be replaced immediately.
3, the need for frequent calibration and testing of gas detectors:
Portable combustible gas detector is generally used to determine the relative comparison method, the determination method is as follows:
First of all, a standard concentration of gas and a zero gas to the instrument is calibrated to obtain the standard curve stored in the instrument; the standard concentration of the electrical signals and the concentration of gas to be measured to be compared with the electrical signals generated, the calculation of the gas concentration to be measured. The electrical signal of the standard concentration and the electrical signal generated by the gas concentration to be measured are compared, and the accurate gas concentration value is obtained after calculation.