Hanna Instruments HI 121 - Manual (Page 5)

5
F U N C T I O N A L D E S C R I P T I O N
HI 123
1) Left Keyboard
2) ON switch
3) OFF switch
4) Right Keyboard
5) Reference input socket for ISE channel
6) BNC electrode connector for ISE channel
7) Pin input socket for pH channel
8) BNC electrode connector for pH channel
9) Temperature probe socket
10) Power adapter socket
11) RS232 serial communication connector
12) Printer
ON OFF
NUM Reso Ion
RelmV mV pH
AutoLOG
Paper Print AutoHOLD
1
2
3
4
Front Panel
Primary LCD
Secondary LCD
Electrode Condition
Electrode Response
Rear Panel
5
6
7
8
9
10
11
12
Paper Roll
RS232 POWER TEMP pH/ORP PIN ISE REF
LOG
CHANNEL CFM CAL
Calibration Check
HI 123 pH / mV / ISE Meter