Adjust value
pH 3.09
pH 3.08 25˚C
00:06
CALIBRATING pH
CALIBRATING pH
...
Start calibration
Channel 1
Technical buffers
Calibration pH
Theoretical cal.
Pot. asym.: 0 mV
Slope: 59.16mV/pH
Temperature: 25 °C
Continue...
Technical buffers
Use first buffer
Continue...
CALIBRATING pH
DIN 19266 buffers
Use First Buffer
Continue...
CALIBRATING pH
To a X value
Use standard
Continue...
CALIBRATING pH
Type of
calibration
Technical buffers
DIN 19266 buffers
User Buffers
To a X value
Calibration pH
Type of
calibration
Technical buffers
DIN 19266 buffers
User Buffers
To a X value
Calibration pH
Type of
calibration
Technical buffers
DIN 19266 buffers
User Buffers
To a X value
Calibration pH
Type of
calibration
Technical buffers
DIN 19266 buffers
User Buffers
To a X value
Calibration pH
Type of
calibration
Data introduction
Theoretical cal.
Calibration pH
Type of
calibration
Data introduction
Theoretical cal.
Calibration pH
Channel 1
pH CALIBRATION
10-04-2010 17:15
Stability c: standard
C
alibration type
Frequency
View mV
Calibration pH
Stability c: standard
Calibration type
Frequency
View mV
Calibration pH
User buffers
1st buffer pH
Continue...
CALIBRATING pH
User buffers
Start calibration
No. Buffers: 1
Buffer 1
CALIBRATING pH
Calibration pH
Calibration frequency
Automatic warning.
1 day
00
hours
Calibration pH
Introducing data
Pot. asym.:
0
mV
Slope: 59.16mV/pH
Temperature: 25 °C
Save changes
4. Operation
4.5. Other options for calibration
Automatic buffers recognition
Technical buffers
pH 2 .00, 4 .01, 7 .00, 9 .21 and 10 .90 at 25ºC (77ºF) .
Buffers DIN 19266
pH 1 .679, 4 .006, 6 .865, 7 .000, 9 .180, 10 .012 and 12 .454 .
User’s buffers
Suitable when the two above mentioned options will not be
used . The
MM340
allows introducing the
table pH/Temp . for the desired buffers . See System, page 17 .
Calibration to X value
Manual re-adjustment of the measured pH at any value of the
scale . The pH readjustment is equivalent to calibration with only
one buffer .
Calibration data introduction
Manual introduction of calibration data for an electrode cali-
brated previously, for example in calibration laboratory .
Theoretical calibration
Selecting “theoretical calibration” the calibration data of the elec-
trode in use are replaced by the theoretical values at 25ºC (77ºF) .
This step is prior to the obtention of a calibration certificate .
Calibration frequency
Select between 0 h and 7 days . The instrument by default is
programmed for daily calibration and indicates the remaining
time to the new calibration .
Selecting 0 h the automatic re-calibration warning is deactivated .
Stability criteria.
Rapid criterion (variation < 0 .02 pH in 6 s) .
Standard criterion (variation < 0 .01 pH in 6 s) .
Strict criterion (variation < 0 .002 pH in 6 s) .
It is highly recommended to apply the same stability criteria to
measure and calibrate .
Important note:
Once the calibration is
re-programmed, it will be
performed with the new
programming .
9
ENGLISH
Start of calibration
with automatic
recognition of the
selected buffers.
Start calibration
The instrument goes
to MEASURE menu.
The theoretical cali-
bration will be used.
The instrument goes to the
option “CALIBRATE pH” and
it must be recalibrated.
The instrument goes to
MEASURE menu. The
introduced calibration
data will be used.
See Stability Criteria
and View mV
on page 10.
The instrument
goes to Measure.
See page 17.
