13
The temperature has an effect on pH. The calibration buffer solutions
are affected by temperature changes to a lesser degree than normal
solutions. During calibration the instrument will automatically calibrate
to the pH value corresponding to the measured or set temperature.
During calibration the instrument will display the pH buffer value at
25 °C.
pH BUFFER TEMPERATURE
DEPENDENCE
P
M
E
T
S
R
E
F
F
U
B
H
p
C
º
F
º
8
6
.1
1
0
.4
6
8
.6
1
0
.7
8
1
.9
1
0
.0
1
5
4
.2
1
0
2
3
7
6
.
1
1
0
.
4
8
9
.
6
3
1
.
7
6
4
.
9
2
3
.
0
1
8
3
.
3
1
5
1
4
7
6
.
1
0
0
.
4
5
9
.
6
0
1
.
7
9
3
.
9
4
2
.
0
1
8
1
.
3
1
0
1
0
5
7
6
.
1
0
0
.
4
2
9
.
6
7
0
.
7
3
3
.
9
8
1
.
0
1
9
9
.
2
1
5
1
9
5
7
6
.
1
0
0
.
4
0
9
.
6
5
0
.
7
7
2
.
9
2
1
.
0
1
0
8
.
2
1
0
2
8
6
8
6
.
1
0
0
.
4
8
8
.
6
3
0
.
7
2
2
.
9
6
0
.
0
1
2
6
.
2
1
5
2
7
7
8
6
.
1
1
0
.
4
6
8
.
6
1
0
.
7
8
1
.
9
1
0
.
0
1
5
4
.
2
1
0
3
6
8
8
6
.
1
2
0
.
4
5
8
.
6
0
0
.
7
4
1
.
9
6
9
.
9
9
2
.
2
1
5
3
5
9
9
6
.
1
3
0
.
4
4
8
.
6
9
9
.
6
1
1
.
9
2
9
.
9
3
1
.
2
1
0
4
4
0
1
9
6
.
1
4
0
.
4
4
8
.
6
8
9
.
6
7
0
.
9
8
8
.
9
8
9
.
1
1
5
4
3
1
1
0
7
.
1
5
0
.
4
3
8
.
6
8
9
.
6
4
0
.
9
5
8
.
9
3
8
.
1
1
0
5
2
2
1
1
7
.
1
6
0
.
4
3
8
.
6
8
9
.
6
1
0
.
9
2
8
.
9
0
7
.
1
1
5
5
1
3
1
2
7
.
1
8
0
.
4
4
8
.
6
8
9
.
6
9
9
.
8
9
7
.
9
7
5
.
1
1
0
6
0
4
1
2
7
.
1
9
0
.
4
4
8
.
6
8
9
.
6
7
9
.
8
7
7
.
9
4
4
.
1
1
5
6
9
4
1
3
7
.
1
1
1
.
4
4
8
.
6
9
9
.
6
5
9
.
8
6
7
.
9
2
3
.
1
1
0
7
8
5
1
4
7
.
1
2
1
.
4
5
8
.
6
9
9
.
6
3
9
.
8
5
7
.
9
1
2
.
1
1
5
7
7
6
1
6
7
.
1
4
1
.
4
6
8
.
6
0
0
.
7
1
9
.
8
4
7
.
9
0
1
.
1
1
0
8
6
7
1
7
7
.
1
6
1
.
4
7
8
.
6
1
0
.
7
9
8
.
8
4
7
.
9
0
0
.
1
1
5
8
5
8
1
8
7
.
1
7
1
.
4
7
8
.
6
2
0
.
7
7
8
.
8
4
7
.
9
1
9
.
0
1
0
9
4
9
1
9
7
.
1
9
1
.
4
8
8
.
6
3
0
.
7
5
8
.
8
5
7
.
9
2
8
.
0
1
5
9
3
0
2
1
8
.
1
0
2
.
4
9
8
.
6
4
0
.
7
3
8
.
8
6
7
.
9
3
7
.
0
1
16
LCD MESSAGE GUIDE
TAGS & SYMBOLS
Mode tags
light up for indicating the corresponding active mode,
and blink for warning the user.
SETUP on
: setup menu mode has been entered.
CFM blinking
: ask confirmation of calibration value.
CAL on
: calibration mode has been entered.
CAL blinking
: meter is not calibrated or calibration is expired.
RCL, MEM on
: when recalling stored values.
MEM blinking
: measurement stored in the internal memory and
frozen on the display.
Indication of
temperature compensation mode
:
MTC
for manual,
ATC
for automatic compensation.
Battery symbol blinking
: low battery condition. Batteries should
be replaced soon.
Calibration messages
.
NOT READY blinking
: buffer has been recognized, but reading
is not stable.
READY on
: buffer has been recognized and reading is stable.
WRONG and WRONG blinking
alternatively: wrong
buffer, value not recognized.
CLEAN blinking
: an abnormal difference between new and
previous calibration has been detected. Electrode cleaning is
suggested. Follow the cleaning procedure described in the
Electrode conditioning & maintenance section. If the problem
remains, check the buffer solutions.
temperature
compensation
mode
pH or mV
measurement
calibration buffers
custom buffers active
temperature reading
or pH buffer value
mode tags
instability
indicator
battery
symbol
calibration
messages
condition
bargraph
arrow keys
active
first or second
calibration point
calibration
messages