Hach-Lange SENSION+ MM110 - Manual (Page 16)

12
5. Operation
5.4. Calibrating the redox electrode
Important note: Before turning on the instrument, check that the sensor
is connected.
Redox electrodes do not have a significant drift of the potential, which is
why they are not typically not calibrated. However, some deviations of
potential may occur after continued use of the electrode as a result chan-
ges to of the metal surface or contamination of the reference electrode.
5.4.1. Preparation
1. Fill the tube with the 200 mV standard solution (note the fill level).
2. Unscrew the protector containing the electrolyte and rinse the sensor
with deionized water.
3. Screw the sensor on to the tube containing the standard.
5.4.2. Calibration
Stir gently holding the sensor by the handle. Do not hold it by the tube to
avoid heating of the standard solution.
Follow the diagram.
Notes: If the measuring instrument is not used for 5 minutes, it shuts off
automatically.
If errors occur during calibration, an error message will appear on
screen (see pg. 19).
During redox calibration, the temperature of the standard must be ma-
nually entered (by pressing
during the process).
t
mV
t
mV
t
mV
t
mV
ml
P/N. LZW9462
ml ml m ml
P/N.
LZW94
94
2 3
Screw the
sensor
to the
standard
tube.
1
sensION+ MM110 HACH_LANGE 0710.indd ANG:12 sensION+ MM110 HACH_LANGE 0710.indd ANG:12 7/9/10 15:33:01 7/9/10 15:33:01