3-1 Display
3-2 Power Button ( Backlight Button )
3-3 Hold Button ( ESC Button )
3-4 REC Button ( Enter Button )
3-5
Button
▲
3-6 Button ( Function Button )
▼
3-7 Time Button
3-8 Logger Button ( SET Button, Sampling check )
3-9 Stand
3-10 Battery Compartment/Cover
3-11 Battery Cover Screw
3-12 Tripod Fix Nut
3-13 DO Probe Socket
3-14 DC 9V Power Adapter Input Socket
3-15 Reset Button
3-16 RS-232 Output Terminal
3-17 SD card socket
6