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 Temp. Socket ( pH ATC Socket )
3-14 pH Socket ( BNC Socket )
3-15 DC 9V Power Adapter Input Socket
3-16 Reset Button
3-17 RS-232 Output Terminal
3-18 SD card socket
6