1. The instrument must be vertical: use a 17mm wrench to tighten during installation, and do not force the case; avoid collision during transportation;
2. The instrument should be used in an ambient temperature of -25~55℃;
3. The vibration frequency of the working environment is <25HZ, and the amplitude is not greater than 1mm;
4. If the instrument indication value does not return to zero or the indication value exceeds the tolerance due to high ambient temperature during use, the sealing rubber plug on the upper part of the case can be cut open to allow the inner cavity of the instrument to communicate with the atmosphere;
5. The instrument's use range should be between 1/3 and 2/3 of the upper limit;
6. When measuring corrosive media, media that may crystallize, and media with high viscosity, an isolation device should be added;
7. The instrument should be calibrated frequently (at least once every three months), and if a fault is found, it should be repaired in time;
8. If the instrument is found to be invalid or damaged due to poor manufacturing quality under normal storage and use conditions within half a year from the date of leaving the factory, the company shall be responsible for repairing or replacing it;
9. For instruments that need to measure corrosive media, the required conditions should be indicated when ordering.
