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