Hanna Instruments pH 300, Instruction Manual, Page: 31 / 57

61 60
There will be a long beep after either 1 + EN-
TER or 2 + ENTER is pressed, when the en-
tered value is either wrong or not acceptable
by the particular program.
The 9 programs stored in the instrument are:
Program #0
To end the program function.
Program #1
To set the sample number, the time and the
date (see page 60).
Program #2
To calibrate the meter using a nonstandard
calibration buffer value (see page 64).
Program #3
To print the pH calibration data complete with
date, time, pH offset and slope (see page 66).
Program #4
To log and print the pH/mV/temperature val-
ues at the selected interval from the start to
the finishing time. The printout interval can
be selected from 1 minute to 24 hours. This
program can be stopped by selecting any
other PGM function (see page 67).
Program #5
To log and print the pH/mV/temperature val-
ues at a user-selectable interval from a given
time up to a selectable pH or mV value.
When this pH/mV value is exceeded, the
program stops by printing the endpoint hour
and minute. The printout interval can be se-
lected from 1 minute to 24 hours. This pro-
gram can also be stopped by selecting any
other PGM function (see page 71).
Program #6
To set the upper and the lower pH or mV
alarm limits. A beeper will sound whenever
the measured value exceeds the limit. This
program can only be terminated by pressing
PGM + 0 (see page 75).
PROGRAMMING FUNCTIONS
WITH pH302
There are 9 programs all together in the
instrument. To select a particular program,
press PGM followed by the program number
on the numeric keyboard.
E.g. To select program 1
• press PGM
• press 1
By pressing PGM
the secondary LCD will show "
P
" to confirm
the programming mode.
By pressing 1, the secondary LCD will show
"
P1
" to confirm the selected program.
At this stage, the secondary LCD
shows "Px - y", where x refers to
the program number you pressed
and y refers to 1 ENTER or 2
ENTER, i.e.:
• choice #1 selected
by pressing 1 fol-
lowed by ENTER
or
• choice #2 selected
by pressing 2 fol-
lowed by ENTER.
Whenever a numeric value is entered, the
entry appears on the primary display.
PGM
1
1
ENTER/
2
ENTER/