Operation
inoLab pH/ION 735
30
Preparatory activities
Perform the following preparatory activities when you want to calibrate:
4.4.6
Carrying out the TEC and NIST/DIN calibration
The two calibration procedures only differ in the usage of different buff-
er sets (see section 4.4.5). Make sure that the
Cal. type
is correctly set
in the sensor menu (see section 4.4.4).
For this procedure, use any one, two or three WTW technical buffer so-
lutions in ascending or descending order.
The
TEC
calibration is described below. With the
NIST/DIN
calibration,
the
NIST/DIN
buffer recognition and different nominal buffer values are
displayed. Apart from that, the procedure is identical.
Note
The TEC calibration for pH 10.01 is optimized for the WTW technical
buffer solution TEP 10 Trace or TPL 10 Trace. Other buffer solutions
can lead to an erroneous calibration. The correct buffer solutions are
given in the WTW catalog or on the Internet.
1
Connect the pH electrode to the meter.
The pH/ISE measuring window is displayed.
2
Keep the buffer solutions ready. Adjust the temperature of the
buffer solutions, or measure the current temperature, if you
measure without a temperature sensor.
1
In the measured value display, select the pH or mV measuring
window with
82
and
m
.
2
Start the calibration with
c
.
The calibration display appears.
3
Immerse the electrode in buffer solution 1.
4
If the
Set temperature
menu item appears, measure and enter
the temperature of the buffer manually (measurement without
temperature sensor).
i
Buffer recognition
TEC
i
Immerse sensor in buffer 1
Continue
pH <CAL>
