Operation
Multi 350i
38
4.4.7
Carrying out a ConCal calibration
Single-point calibration
Use any buffer solution for this rapid method.
The calibration will be the more exact the nearer the pH value of the
buffer solution is to that of the test sample.
Two-point calibration
Use two buffer solutions for this procedure:
!
first buffer solution: pH 7.0 ± 0.5
!
any other buffer solution
For this calibration,
Calibration type
ConCal
must be set in the sensor
menu (see section 4.4.4).
1
In the measured value display, select the pH or mV measuring
window with
<
▲
> <
▼
>
and
<M>
.
2
Start the calibration with
<CAL>
.
The calibration display appears.
3
Thoroughly rinse the electrode with distilled water.
4
Immerse the electrode in buffer solution 1.
5
Set the nominal buffer value for the measured temperature with
<MENU/ENTER>
and
<
▲
> <
▼
>
. Then confirm the value with
<MENU/ENTER>
.
6
If the
Set temperature
menu item appears, measure and enter
the temperature of the buffer manually (measurement without
temperature sensor).
7
Select
Continue
with
<
▲
> <
▼
>
and press
<MENU/ENTER>
.
The buffer is measured.
The measured value is checked for stability (AutoRead).
i
Immerse sensor in buffer 1
i
Temperature = 24.8 °C
Set buffer:
7.00
Continue
pH <CAL>
Summary of Contents for Multi 350i
Page 10: ...Overview Multi 350i 8...
Page 82: ...Operation Multi 350i 80...
Page 106: ...Appendix Firmware Update Multi 350i 104...
Page 107: ......
