Hanna Instruments HI 253 - Manual (Page 4)

4
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 calibration mode.
4) /ºC key, to manually decrease temperature value or other parameters.
5) /ºC key, to manually increase temperature value or other parameters.
6) RCL key, to enter/exit recall mode.
7) LOG key, to store measured data.
8) SET/CLR key, to enter/exit setup mode, clear pH calibration or delete
logged data.
9) RANGE key, to select measurement range or to switch focused data.
10) ON/OFF switch.
11) Power supply socket.
12) BNC electrode connector.
13) Electrode reference socket.
14) Temperature probe socket.
15) RS232 serial communication connector.
F U N C T I O N A L D E S C R I P T I O N
Front Panel Primary LCD
Secondary LCD
1
9 3
2
7
4
6
5
10
8
POWER
12VDC
INPUT
REF
TEMP
11 12 13 14
Rear Panel
C
CAL
CFM
READY 1
2
3
BUF WRONG
LOG mV pH TIME % DATE INTV
BUFFER pH
RS232
15
Functions pH Calibration - 3 points
RCL LOG
CLR
SET C C
RANGE
GLP
CFM CAL
CFM
/
CAL
RANGE
GLP
LOG
SET/CLR
RCL
pH / ORP / Ion Meter
HI 253
Confirm Calibration
in selected pH Buffer
Select pH Buffer
Start/Exit Calibration
Select pH/ORP/ mV/Ion
Scroll Log Data
Rel
Show GLP Data
Store Log Data
Set Instrument Parameters
Clear Calibration/Log Data
Recall Log Data
ppm