Operation
inoLab pH/ION 735
42
Preparatory activities
Perform the following preparatory activities when you want to calibrate:
Carrying out an
ISE calibration
Proceed as follows to calibrate the instrument:
1
Connect the ISE combination electrode to the meter.
The pH/mV/ISE measuring window is displayed.
2
Keep the standard solutions ready.
3
If necessary, measure the temperature of the standard solu-
tions with a thermometer.
1
In the measured value display, select the ISE measuring win-
dow with
82
and
m
.
2
Start the calibration with
c
.
The calibration display appears.
3
Thoroughly rinse the electrode with distilled water.
4
Immerse the electrode in standard solution 1.
5
Select the
Set standard
setting with
82
and press
g
.
6
Set the concentration of the standard solution with
82
and
press
g
.
7
When calibrating without temperature sensor:
!
Measure the temperature of the standard solution using a
thermometer.
!
Select the
Set temperature setting with
82
and press
g
.
!
Set the temperature with
82
and press
g
.
!
Select
Continue
with
82
and press
g
.
The standard solution is measured.
The measured value is checked for stability (AutoRead).
i
Immerse sensor in std. 1
Set temperature
:
24 °C
Continue
Set standard
:
0.010 mg/l
ISE <CAL>
