Hanna Instruments HI 221 - 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 to 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 electrode connector.
13) Pin input socket.
14) Temperature probe socket.
15) RS232 serial communication connector.
Note: Pin input socket cannot be used as a reference input for electrodes with
separate reference.
Functions pH Calibration
HI 223 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
Front Panel Front Panel 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
Rear Panel Rear Panel
RS232
15
Front Panel
Rear Panel