STOP
：Show the stop time of record / print. 6. 
：
：
INTV
：Show the interval time of record / print. 7. 
：
：
8.
9.
10. 
11. mVA
12.G
13.T
14.
15.MAX
16.MIN
17.LUX
18.Fc
19.dB
20.%RH
21.
22.
.
23.
：DC test symbol.
：AC test symbol.
：Low battery indicator.
：Analog test indicate unit.
：The printer working in the graphic mode.
：The printer working in the text mode.
：Memory record indicator.
：MAX Analog input indicator.
：MIN Analog input indicator.
：LUX unit indicator.
：dB unit indicator.
：Relative Humidity %RH unit indicator.
：Printer in using indicator.
：7 segments to show the read value and decimal point of LCD.
：Negative polarity.
3