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Operating manual
pH combination electrodes Order number
SensoLyt
®
SEA
109 115Y
SensoLyt
®
SEA-HP
109 118Y
SensoLyt
®
ECA
109 117Y
SensoLyt
®
DWA
109 119Y
ORP combination electrodes Order number
SensoLyt
®
PtA
109 125Y
®
SensoLyt
combination electrodes
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Fields of application SensoLyt® combination electrodes
Fields of application
Electrode Application area
pH combination elec-
®
trode SensoLyt
SEA
pH combination electrode
®
SensoLyt
SEA-HP
pH combination electrode SensoLyt
®
ECA
pH combination elec-
®
trode SensoLyt
DWA
ORP combination elec-
®
trode SensoLyt
PtA
Assembly
Measurements in moderately or heavily l oaded
waste water and in emulsions, suspensions
and media that contain protein and sulfide.
Measurements in moderately or heavily l oaded
waste water and in emulsions, suspensions
and media that contain protein and sulfide.
To be used under increased pressure and t emperature conditio ns.
Measurements in municipal and normally
charged waste water.
Measurements in drinking water.
Measurements in waste water, emulsions, suspensions and media that contain protein and
sulphide.
Note
Prior to installing the electrode in an armature, lubricate the two O rings of the
armature with the grease provided.
Calibrating, measuring
Note
See operating manual of the meter.
Note
Take off the watering cap when you want to calibrate or measure.
2
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SensoLyt® combination electrodes Cleaning
Cleaning
Contamination Cleaning
Gross contamination at the
junction
Carefully brush off contamination under
running water using a soft toothbrush
Membrane contamination Splash the electrode with water, then blot it
dry using a moist paper towel (do not rub).
Fat, oil, protein-containing
coatings and similar substanc-
Remove with household washing-up
liquid
es
Conversion to standard hydrogen electrode
®
(SensoLyt
UH = U
with: U
Meas
H
U
Meas
U
Ref
PtA only)
+ U
Ref
= ORP, referring to the standard hydrogen electrode
= Measured ORP
= Voltage of the reference system compared to the st andard
hydrogen electrode
U
depends on the reference system and temperature and is given in the
Ref
following table (see also DIN 38404-6 for the system, Ag/AgCl/
saturated KCl):
T (°C) U
SensoLyt
tion electrodes
[mV] T (°C) U
Ref
®
combina-
SensoLyt® combina-
[mV]
Ref
tion electrodes
0 +221 35 +187
5 +216 40 +181
10 +212 45 +176
15 +207 50 +171
20 +202 55 +165
25 +197 60 +160
30 +192
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Maintenance / regeneration (SensoLyt® PtA only) SensoLyt® combination electrodes
1000
800
600
400
200
20481012146
0
pH value
U
H
in mV
oxidizing pretreatment
reducing pretreatment
Maintenance / regeneration
®
(SensoLyt
PtA only)
First-time
activation during
installation and as
required
Activation during
very long set-up
times
For first-time activation, use the activating powder provided with the SORT/
RH reagent set. Use a paper towel to gather a small amount of activating
powder. Using moderate pressure, press the activati ng powder against the
moist (but not dripping) platinum elect rode from two opposi te sides and turn
the electrode to and fro several times. Activation happens mainly due to
abrasion. Then remove the adherent remains of activating powder under
running water with a soft brush (e.g. toothbrush).
When changing from oxidizing to reducing test sol utions and vice versa this
can result in set-up times that can take signifi cantly more than an hour. In this
case pretreatment (activ ation) of the plat inum surface can shor ten the set-up
time. The type of pretreatment (reduci ng or oxidizing) is based on the pH value and the ORP voltage (U
) of the test soluti on where the l atter must be es-
H
timated for the first measurement.
The type of pretreatment can then be det ermined using the following diagram
where U
refers to the normal hydrogen electrode:
H
4
Oxidizing pretreatment
Reducing pretreatment
Immerse the platinum electrode for two to three
days in a sulfuric Clorina solution. Clorina powder
for producing the solution is included in the SORT/
RH reagent set.
The junction must not be immersed in the Clo-
Note:
rina solution (see figure below)!
When the electrode is ready for the test immerse it
in the Zobell ORP buffer solution and wai t for a st able measured value.
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SensoLyt® combination electrodes Accessories
Maximum depth of immersion
for cleaning solution
Note
The platinum electrode (1) should be completely covered duri ng the pretreatment but the electrode must not be immersed in the solution up to the refer ence system with the hole junction (2) (see followi ng figure).
Note
Detailed information on activating platinum electrodes, such as how to produce the Clorina solution, is gi ven in th e WT W appli cati on report ent itl ed R
GENERATING ORP ELECTRODES. The application report is included in the
E-
SORT/RH reagent set.
General
accessories
Buffer solutions
for SensoLyt
pH electrodes
Accessories for
SensoLyt
®
PtA
Accessories
Description Model Order no.
Reference electrolyte solution 250 ml
to fill the water in g cap
(KCl 3 mol/L, Ag
+
free)
Description Model Order no.
®
pH 4 (box of 6 pints) 3821 003821
pH 7 (box of 6 pints) 3822 003822
pH 10 (box of 6 pints) 3823 003823
pH assorted (2 pints ea of 4, 7, and 10) 3824 603824
Description Model Order no.
Reagent set for regenerating ORP platinum electrodes, comprising
10 g activation powder and 30 g Clorina
powder
KCl-250 109 705Y
SORT/RH 109 730Y
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Zobell ORP buffer solution (125 ml) 3682 061320
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Technical data SensoLyt® combination electrodes
Technical data
pH measuring
range
ORP measuring
range
Pressure range at
temperature
(armored
electrodes only)
Measuring
electrode
SensoLyt® SEA
SensoLyt
SensoLyt
SensoLyt
SensoLyt
®
ECA
®
SEA-HP pH 4 ... 12
®
DWA pH 0 ... 14
®
PtA -2000 ... 2000 mV
pH 2 ... 12
(pH application range pH 4 ... 12)
SensoLyt
SensoLyt
SensoLyt
SensoLyt
®
SEA
®
ECA
®
DWA
®
PtA
Temperature
Allowed overpressure
0 °C (32 °F) 1000 kPa (10 bar)
20 °C (68 °F) 1000 kPa (10 bar)
30 °C (86 °F) 500 kPa (5 bar)
40 °C (104 °F) 300 kPa (3 bar)
60 °C (140 °F) 100 kPa (1 bar)
SensoLyt
All SensoLyt
®
SEA-HP 0-60 °C (32-140 °F) 1000 kPa (10 bar)
®
combination electrodes meet the requi rements of article 3 (3)
of the directive 97/23/EC ("Pressure equipment directive").
SensoLyt
®
PtA Platinum ring
Reference
electrolyte,
junction
Shunt conduction
element
Connection Plug-in system (S7)
Minimum
immersion depth
All except for
SensoLyt
SensoLyt
SensoLyt
SensoLyt
SensoLyt
SensoLyt
®
PtA
®
SEA
®
SEA-HP
®
PtA
®
ECA Gel electrolyte; 1-hole junction
®
DWA Modified gel electrolyte;
Ag/AgCl
25 mm
Glass
Gel polymer solid electrolyte;
2-hole junction
ceramic junction
6
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SensoLyt® combination electrodes Technical data
77
83
120 23,5
Ø12
Ø20
Ø18,8
Ø16
Ø24
Dimensions
Weight approx. 65 g
Materials Shaft Glass
Armoring SensoLyt
®
SEA-HP: POM
All other types: PVC-U
Connection head PPS-GF40
O-rings FPM (Viton)
Watering cap PE
Storage With watering cap, filled with KCl 3 mol/L, Ag
Disposal Residual waste
+
free
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1725 Brannum Lane
Yellow Springs, Ohio 45387 USA
+1 937-767-7241
800-765-4974 (US)
FAX (937) 767-1058
Email: environmental@ysi.com
Internet: www.ysi.com
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