TN800 Formaldehyde Monitor Operating Procedures To better use the instrument, read the instructions carefully before use. Before the test, the instrument can reasonably grasp the warm-up time. For example , if you have not used before more than 2 hours, if you require a higher result, it is recommended that you warm up for 15 minutes. If the power is less than 40% , it is recommended to charge it for emergency use. This instrument is equipped with a Teflon sampling tube. If the dust is very large, it is recommended to use a sampling tube with a dust filter inserted into the air inlet (left gas nozzle), otherwise it is not recommended to use a sampling tube with a filter; The vent can decide whether to connect the trachea according to the situation. After the detection of toxic and harmful gases, it must be in a clean environment, and then enter the detection mode for a gas detection, until the concentration of toxic and harmful gases return to 0ppm , and lasts more than 1 minute, and then shut down into the instrument box. The ideal working temperature of most sensors is 20 degrees Celsius, so when used in a low temperature environment, the sensor response will be slower than usual, especially semiconductors such as odors, they require a long warm-up time, need to maintain a certain temperature Only accurate detection can be performed. Under high humidity conditions (greater than 65% RH ), the signal of the sensor is usually too large.


Before testing the target environment, verify that the instrument is working properly. Perform the following steps in a clean environment:

Turn on the clean air and enter the detection mode. The clean air detector will warm up according to the required warm-up time for each sensor. The time required for warming up will be displayed in the lower right corner of the screen as a countdown: preheating xxx ; the unit is second. Preheating data is inaccurate. If the test items cannot return to zero in the clean air, it is recommended to wait for several more minutes until the sensor returns to zero and enter the target environment for detection. If you are in clean air for more than 10 to 15 minutes, you cannot return to zero. You should consider whether this environment is really clean. Especially in industrial areas, the atmospheric environment of industrial areas is also very bad. The way to eliminate this problem is to keep the instrument away from the contaminated area, and then start the test to see if it is back to zero. If the problem persists, please contact us. Please contact us if there is anything unclear during the operation.

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May 21, 2024