The necessity of gas detector calibration
The performance and quality of gas detection alarms are directly related to the personal safety of personnel at the work site, and are one of the guarantees for safe production. Therefore, adopting scientific and reasonable detection methods for different gas detectors is an important measure to ensure personal safety, property safety, and production safety The calibration of gas detectors mainly focuses on the calibration of sensors, while the common malfunction of catalytic sensors is performance degradation caused by contact with specific toxic substances. Therefore, the key is not only to calibrate the gas monitoring system during installation, but also to regularly check and recalibrate it if necessary. Accurate calibration of the standard gas mixture must be used for inspection in order to correctly set the zero value and "range" level on the controller.
Some instruments have a calibration cycle set. When the instrument is used for more than the calibration cycle, it will alarm or display a fault. In this case, the instrument needs to be recalibrated. For example, the Delger X-AM2500 composite gas detector. Some customers have reported that after using it for a period of time, the carbon monoxide always displays -2, which requires recalibration How can it be effectively calibrated? Different brands and models may have slight differences, and an effective method is to refer to the instructions of the model for operation. A common and low-cost method is to have two people check and calibrate, with one person responsible for exposing the sensor to the range of the airflow and control device. Then adjust the controller to zero and adjust the range potentiometer until the reading matches the concentration of the gas mixture completely. If the operation is still not good, it is better to ask the technical personnel related to the gas detector for guidance
The fully automatic blood alcohol content detector has been upgraded and equipped with new features
The fully automatic blood alcohol content detection dedicated gas chromatography analyzer (GC-7980F model) adopts a large Chinese screen LCD display, which is intuitive to operate. The instrument has multiple functions such as automatic diagnosis, automatic power-off protection, file calling and storage, and eighth order program temperature rise. And it has a separate vertical heating capillary injection system, which greatly reduces the impact of the vaporization chamber on the column chamber and improves the adaptability to various injectors.
The new FID hydrogen flame detector has high sensitivity and can be easily loaded and unloaded with nozzles and ion collection electrodes. The instrument also has six independent temperature control system areas, and each vaporization chamber, detector, and amplifier adopts modular design, making installation and replacement convenient and simple. The ultra large capacity chromatography column box can simultaneously install capillary chromatography columns and packed columns, with three independent injection systems.
