1、测量时，要保持空气的相对静止，不流动，同时测量人员应远离一个手臂左右;

1, when measuring, it is necessary to keep the air relatively stationary and not flow, and the surveyors should stay away from one arm or so.

2、电池电压低于7.5V，应该更换电池，待机情况下(STANDBY)，电池使用时间约为10小时;测量情况下(MEASURE)，电池使用时间约为2小时，否则，测量的结果会产生很大误差;

2, the battery voltage is lower than 7.5V, and the battery should be replaced. Standby time (STANDBY), the battery use time is about 10 hours. Under the measurement condition (MEASURE), the battery use time is about 2 hours, otherwise, the measurement result will produce great error.

3、不要联续开机测定;

3, do not continue to start testing.

4、读数要取出现的数值范围的中间读数.

4. Read the intermediate readings of the number of values that appear.