Historical data preservation method
A. after the measurement is completed, lock and keep the value;
B, if the measured value needs to be saved, press the+key to save;
In this way, 32 records can be saved.
Historical data viewing method
A. Press the MEM key and the LCD will display ""(see part H in Figure 2);
B. The historical measured values in various modes are displayed in parts A, B and C of the LCD (see Figure 2);
C, press-or+key to turn pages to view other records in turn. In the process of page turning, part B of LCD displays the total number of historical records, and part A displays the sorted number of current historical records;
D to exit the history view, press the MEM key, and the LCD icon will disappear.