Hanna Instruments HI 222 - Manual (Page 4)

4
FUNCTIONAL DESCRIPTION
1) Liquid Crystal Display (LCD)
2) CFM / GLP key, to confirm different values or to display Good Laboratory
Practice information
3) CAL key, to enter and exit/escape the calibration mode
4)
/ ºC key, to manually decrease temperature, or other parameters
5) / ºC key, to manually increase temperature, or other parameters
6) RCL key, to enter or exit the recall mode
7) LOG key, to store measured data
8) RANGE key, to select the measurement range or switch the focused data
9) SET / CLR key, to enter the Setup mode or clear calibration history
10) ON / OFF switch
11) Power supply socket
12) BNC connector for electrode
13) Pin input socket
14) Temperature probe socket
15) RS232 serial communication port
Note: Pin input socket can not be used as reference input for separate
electrode reference.
Functions pH Calibration
HI 222 Calibration Check
Microprocessor pH Meter
Confirm 2 Buffer nd CFM
Select 2 Buffer nd /
Confirm 1 Buffer st CFM
/ Select 1 Buffer st
Start Calibration CAL
CFM/GLP Show GLP Information
Set Instrument Parameters
Clear Log/Cal Information
SET/CLR
RCL Recall Log Information
LOG Store Log Information
Select pH/ORP RANGE
RCL LOG
CLR
SET C C
RANGE
GLP
CFM
CAL
Primary LCD
Secondary LCD
C
ATC
pH
SLOW FAST POOR GOOD
1
8 3
2
7
4
6
5
10
9
Electrode
Condition
Electrode
Response
POWER
12VDC
INPUT TEMP
11
12
13
14
RS232
15
Front Panel
Rear Panel