Hanna Instruments HI 4221 - Manual (Page 6)

6
HI 4222 DESCRIPTION
FRONT PANEL
REAR PANEL
1) Liquid Crystal Display (LCD)
2) Main Keyboard
3) USB connector
4) ON/OFF switch
5) Power adapter socket
6) RS232 serial communication connector
7) Temperature probe socket (Channel 2)
8) BNC electrode connector for pH/ORP/ISE measurements (Channel 2)
9) Reference input socket (Channel 2)
10) Temperature probe socket (Channel 1)
11) BNC electrode connector for pH/ORP/ISE measurements (Channel 1)
12) Reference input socket (Channel 1)