Electrode Specification; Factors That Shorten Electrode Life; Literature - Mettler Toledo LoT406-M6-DXK-S7 / 25 Manual De Instrucciones

LoT 406
Sensor Series
Problem
Air bubbles
on aperture
diaphragm;
Slope not
adjustable at
pH 4
The pH
meter shows
unstable
readings
Unusal
measured
values
7

Electrode specification

Designation
Order No.
pH measurement range
Temperature range
Reference system
Reference electrolyte
Diaphragm type
Plug-in connector type
Penetration depth
Diameter
Shaft
PBT = Polybutyleneterephthalate
8

Factors that shorten electrode life

– Dry storage
– pH < 2
– Prolonged immersion in organic solvents
– Storage in distilled or demineralized water
– Temperature fluctuations
9

Literature

– P ractice and theory of the pH measurement
20 606 1531-E
– A pplication pH Measurement in meat
52 000 455
– A pplication pH Measurement in cheese making
52 000 459
– A pplication pH Measurement in raw meat processing
52 000 467
© 04 / 16 Mettler-Toledo GmbH
Printed in Switzerland
Cause
Temperature
fluctuations
Temperature
setting on
pH meter
Buffer solution
is dirty or old
Electrode oily
or dirty
Electrode oily
or dirty
P roblems with
cable
pH meter,
electrode, cable
Remedy
Place electrode in tap water at 40 °C
until bubbles disappear
Make sure pH meter is set to the
buffer temperature
Fresh buffer solution
If heavily fouled, clean electrode
with ethanol / ether 1:1 or hand-hot
(40 °C) soap solution
If heavily fouled, clean electrode
with ethanol / ether 1:1 or hand-hot
(40 °C) soap solution
Check that cable is properly
connected, or change the cable
– C heck contacts at electrode / cable
and cable / pH meter
– C heck cable or use a different one
– C hange electrode and recalibrate
your pH meter
LoT406-M6-DXK-S7 / 25
10 406 3123
2 ... 11
0 ... 80 °C
Argenthal
Xerolyt
Aperture
S7
25 mm
6 mm
PBT (FDA approved)
LoT 406
en
17
Sensor Series
59 906 021