Other Options For Calibration - Hach sensION+ MM340 Manual

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 sensION+ 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 .
10-04-2010 17:15
pH CALIBRATION
Channel 1
Technical buffers Calibration pH
Stability c: standard
...
Calibration type
Start calibration Frequency
Channel 1
View mV
Start calibration
Important note:
Once the calibration is
re-programmed, it will be
performed with the new
programming .
Calibration pH
See Stability Criteria
Stability c: standard
Calibration type
and View mV
Frequency
on page 10. View mV
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 .
Calibration pH CALIBRATING pH
Type of calibration
Technical buffers
Technical buffers
DIN 19266 buffers Use first buffer
User Buffers
Continue...
To a X value
Calibration pH CALIBRATING pH
Type of calibration
DIN 19266 buffers
Technical buffers
DIN 19266 buffers Use First Buffer
User Buffers
Continue...
To a X value
Calibration pH CALIBRATING pH
Type of calibration
User buffers
Technical buffers
DIN 19266 buffers Start calibration
No. Buffers:
User Buffers
Buffer 1
To a X value
See page 17.
Calibration pH CALIBRATING pH
Type of calibration
To a X value
Technical buffers
DIN 19266 buffers
Use standard
User Buffers
Continue...
To a X value
Calibration pH
Calibration pH
Introducing data
Type of calibration
Pot. asym.:
Data introduction
Slope: 59.16mV/pH
Theoretical cal.
Temperature: 25 °C
Save changes
The instrument goes to
MEASURE menu. The
introduced calibration
data will be used.
Calibration pH Calibration pH
Type of calibration Theoretical cal.
Data introduction Pot. asym.: 0 mV
Theoretical cal. Slope: 59.16mV/pH
Temperature: 25 °C
Continue...
Calibration pH
The instrument goes to the
Calibration frequency
option "CALIBRATE pH" and
Automatic warning.
it must be recalibrated.
1 day 00 hours
CALIBRATING pH
User buffers
1st buffer pH
1
Continue...
CALIBRATING pH
pH 3.08 25˚C
00:06
0 mV
The instrument goes
to MEASURE menu.
The theoretical cali-
bration will be used.
Start of calibration
with automatic
recognition of the
selected buffers.
CALIBRATING pH
Adjust value
pH 3.09
The instrument
goes to Measure.
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