
4
FUNCTIONAL DESCRIPTION
HI 121
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
NUMResoIon
RelmVmVpH
AutoLOG
SETGLPAutoHOLD
ON OFF
1
2
3
4
Front Panel
Primary LCD
Secondary LCD
Electrode Condition
Electrode Response
Rear Panel
5
6
7
8
9
10
11
RS232POWERTEMPpH/ORPPINISEREF
RCL
LOG
MODE
CHANNEL
CFMCAL
Calibration Check
pH / mV / ISE Meter
HI 121
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