Thermo Products Video Gaming Accessories 9678BNWP User Manual

User Guide  
Redox/ORP  
Electrodes  
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Introduction  
This user guide contains information on the preparation,  
operation and maintenance of the Thermo Scientific Orion ORP  
electrodes. These ORP electrodes combine a platinum redox  
sensing electrode and a silver/silver chloride reference electrode  
in one body.  
The redox/ORP electrodes can be used to make direct  
measurements of redox potentials or perform potentiometric  
titrations. The ORP Triode electrodes have a built-in thermistor  
for measuring temperature.  
Epoxy Sure-Flow Combination Redox/ORP Electrodes,  
Cat. No. 9678BNWP and 967800  
The Sure-Flow junction prevents the electrode from clogging in  
dirty, viscous or wastewater samples. The epoxy body is break-  
resistant for rugged environments.  
Glass Combination Redox/ORP Electrodes,  
Cat. No. 9778BNWP and 9778SC  
The glass body enables the electrode to be used in solutions  
that contain organic solvents. Use the electrode in water,  
wastewater, metal plating and organic solvent samples.  
Epoxy Refillable ORP/ATCTriode,  
Cat. No. 9180BNMD and 9180BN  
The electrode includes a built-in temperature probe for  
measuring ORP and temperature with one electrode. The  
refillable design allows the electrode filling solution to be  
changed in case of contamination or clogging.  
Epoxy Low Maintenance ORP/ATCTriode,  
Cat. No. 9179BNMD and 9179BN  
The electrodes include a built-in temperature probe for  
measuring ORP and temperature with one electrode. The  
electrodes contain a gel reference solution, so no filling solution  
is required.  
Note: Redox/ORP electrodes are not designed for constant  
current or amperometric titrations, such as Karl Fischer  
moisture analysis.  
Redox/ORP Electrode User Guide  
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Required Equipment  
1. Thermo Scientific Orion pH/mV meter, such as the 3-Star  
pH meter, 4-Star pH/ISE meter, 4-Star pH/DO meter, 4-Star  
pH/conductivity meter or 5-Star pH/ISE/DO/conductivity  
meter.  
ORP electrodes can be used on any pH/mV meter with a  
BNC or U.S. standard connection. The electrodes can also  
be used on meters with a variety of inputs when an adapter  
Refillable ORP Triodes have temperature connectors that  
are compatible with specific meters, refer to the list below.  
2. Thermo Scientific Orion ORP electrode.  
The 9180BNMD and 9179BNMD ORP/ATC Triode  
electrodes have a temperature connector that is  
compatible with the Star Series meters.  
The 9180BN and 9179BN ORP/ATC Triode electrode  
have a temperature connector that is compatible with  
the A+ Series meters.  
3. ORP electrode filling solution. Use Cat. No. 900011  
filling solution for samples that have a total ionic strength  
greater than 0.2 M. Use Cat. No. 900001 filling solution for  
samples that have a total ionic strength less than 0.2 M.  
ORP electrode filling solution is not required if using a  
9179BNMD or 9179BN low maintenance ORP/ATC Triode  
4. ORP standard, Cat. No. 967901 or 967961.  
ORP standard is highly recommended to ensure accurate  
ORP measurements.  
5. Beakers, plastic or glass.  
6. Magnetic stirrer or Orion stirrer probe, Cat. No. 096019.  
The stirrer probe can be used with 3-Star, 4-Star and 5-Star  
benchtop meters.  
7. Distilled or deionized water.  
Redox/ORP Electrode User Guide  
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Sample Requirements  
Electrodes with an epoxy body should only be used in aqueous  
solutions.  
Electrodes with a glass body may be used in non-aqueous  
solutions and solutions that contain organic solvents.  
The ORP electrodes contain a silver/silver chloride (Ag/AgCl)  
reference that may become clogged in solutions that contain  
silver complexing or binding agents such as TRIS, proteins and  
sulfides. Frequent cleaning may be required when measuring  
solutions that contain these agents. Proteins cause the  
additional problem of coating the electrode, so extra care should  
be taken to keep the electrode clean while measuring samples  
that contain proteins.  
Redox/ORP Electrode User Guide  
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Electrode Preparation  
Electrode Preparation for Refillable Electrodes  
1. Remove the protective shipping cap from the sensing  
element and save the cap for storage.  
2. Clean any salt deposits from the exterior of the electrode by  
rinsing with distilled water.  
3. Uncover the filling hole by removing the tape and then add  
electrode filling solution, Cat. No. 900011, to the electrode.  
To maintain an adequate flow rate, the level of filling  
solution must always be above the reference junction and  
at least one inch above the sample level. The filling hole  
should be open whenever the electrode is in use.  
4. For Sure-Flow electrode only, wet the junction by pressing  
down on the electrode cap to let a few drops of the filling  
solution flow out of the electrode and then replenish any  
lost solution.  
5. Shake the electrode downward (similar to a clinical  
thermometer) to remove air bubbles.  
6. Connect the electrode to the meter.  
Note: The fill hole must be open when the electrode is in use.  
Electrode Preparation for Gel-Filled Electrodes  
1. Remove the protective shipping cap from the sensing  
element and save the cap for storage.  
2. Clean any salt deposits from the exterior of the electrode by  
rinsing with distilled water.  
3. Shake the electrode downward (similar to a clinical  
thermometer) to remove air bubbles.  
4. Connect the electrode to the meter.  
Redox/ORP Electrode User Guide  
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filling hole  
filling  
solution  
chamber  
Ag/AgCl  
internal  
reference  
ceramic  
reference  
junction  
sensing  
element  
Figure 1– Refillable ORP Electrode  
fill hole  
reference  
filling solution  
chamber  
AgAgCl  
internal  
reference  
Sure-Flow  
junction  
sensing  
element  
Figure 2– Sure-Flow Refillable ORP Electrode  
Redox/ORP Electrode User Guide  
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Electrode Calibration  
ORP readings can be reported using the absolute mV values  
or the EH mV values. EH mV values give the corresponding  
mV values that would be obtained using a Standard Hydrogen  
Electrode (SHE), also known as the Normal Hydrogen Electrode  
(NHE). Orion ORP standard, Cat. No. 967901 or 967961, allows  
operators to correlate measurements to the EH mV value with  
an Orion ORP electrode.  
The relative mV mode can be used to calibrate the ORP  
electrode so the electrode reads the EH mV values in samples.  
When an ORP electrode is calibrated to read EH mV values, the  
resulting sample readings can be compared among multiple  
meter and electrode systems.  
Note: If the meter can perform an automatic ORP calibration  
using an EH mode, refer to the meter user guide for detailed  
instructions on the meter calibration procedure.  
1. Set the meter to the relative millivolt mode. Refer to the  
meter user guide for detailed instructions.  
2. Place the ORP electrode in ORP standard, Cat. No. 967901  
or 967961.  
3. Set the meter to the EH mV value of the ORP standard at  
the measured temperature using the information in Table 1.  
Table 1– ORP StandardValues  
Absolute mV values may vary by 60 mV  
Temperature  
(°C)  
EH Value  
(mV)  
AbsoluteValue AbsoluteValue  
with Cat. No.  
900011 Filling  
Solution (mV)  
with Cat. No.  
900001 Filling  
Solution (mV)  
0
1
2
3
4
5
6
7
8
9
438  
437  
437  
436  
435  
435  
434  
433  
433  
432  
218  
218  
218  
218  
218  
218  
218  
218  
218  
219  
176  
176  
176  
176  
176  
176  
176  
176  
175  
175  
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Temperature  
(°C)  
EH Value  
(mV)  
AbsoluteValue AbsoluteValue  
with Cat. No.  
900011 Filling  
Solution (mV)  
with Cat. No.  
900001 Filling  
Solution (mV)  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
431  
430  
430  
429  
428  
428  
427  
426  
425  
424  
424  
423  
422  
421  
420  
420  
419  
418  
417  
416  
415  
414  
413  
412  
412  
411  
410  
409  
408  
407  
406  
405  
404  
403  
402  
401  
400  
399  
398  
397  
396  
219  
219  
219  
219  
219  
219  
219  
219  
219  
219  
219  
219  
219  
219  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
220  
175  
175  
175  
175  
175  
175  
174  
174  
174  
174  
174  
174  
174  
173  
173  
173  
173  
173  
172  
172  
172  
172  
172  
171  
171  
171  
171  
171  
170  
170  
170  
170  
169  
169  
169  
169  
168  
168  
168  
168  
167  
Redox/ORP Electrode User Guide  
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Measurement Techniques  
Always use fresh ORP standard for calibration.  
If the electrode is refillable, remove the filling hole cover  
during measurements to ensure a uniform flow of filling  
solution.  
Between measurements, thoroughly rinse the electrode  
with distilled water. Gently shake the electrode after rinsing  
to prevent solution carryover and then blot the electrode  
dry with a lint-free tissue.  
Stir all standards and samples at a uniform rate.  
Place a piece of insulating material, such as Styrofoam or  
cardboard, between the magnetic stirrer and beaker to  
prevent measurement errors from the transfer of heat to  
the sample.  
Allow all standards and samples to come to room  
temperature for precise measurements.  
If the electrode is used in dirty or viscous samples or the  
electrode response becomes sluggish, empty the electrode  
completely and hold the junction under running water.  
Empty any water from the electrode and refill it with fresh  
electrode filling solution.  
If a Sure-Flow electrode is used in dirty or viscous samples  
or the electrode response becomes sluggish, empty the  
electrode completely and hold the junction open under  
running water. Empty any water from the electrode and  
refill it with fresh electrode filling solution. Press down on  
the electrode cap to let a few drops of the filling solution  
flow out of the electrode and then replenish any lost  
solution.  
Make sure the electrode filling solution is appropriate  
for the sample. Use Cat. No. 900011 lling solution for  
samples that have a total ionic strength greater than 0.2 M.  
Use Cat. No. 900001 filling solution for samples that have a  
total ionic strength less than 0.2 M.  
Redox/ORP Electrode User Guide  
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Electrode Measurements  
Direct Measurements  
Direct oxidation-reduction potential (ORP) measurements  
can be used to determine the oxidizing or reducing capability  
of a solution and are commonly made in polluted streams,  
chlorinated waters, industrial wastewaters and other water  
samples.  
1. Prepare the electrode according to the Electrode  
Preparation section.  
2. Set the meter to the millivolt, relative millivolt or EH  
measurement mode.  
3. Place the electrode into the sample solution.  
4. When the reading stabilizes, record the displayed mV  
potential and temperature.  
Note: Platinum redox electrodes may give unstable readings in  
solutions that contain chromous, vanadous and titanous ions or  
other ions that are stronger reducing agents than hydrogen or  
platinum.  
Redox/ORP Electrode User Guide  
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Oxidation-Reduction Titrations  
Oxidation-reduction or redox titrations provide a simple,  
reliable method for determining many substances in solution.  
A redox titration consists of adding to an unknown sample  
small increments of a titrant that converts the unknown to  
a different oxidation state. After each addition of titrant, the  
platinum redox electrode develops a potential proportional to  
the logarithm of the ratio of the activities of the two oxidation  
states. At the inflection point, or endpoint, the titrant has  
completely oxidized or reduced the unknown, causing a sharp  
change in the logarithm of the ratio of the activities of the two  
oxidation states. A corresponding sharp change in the potential  
is developed by the platinum electrode. Often several oxidizing  
or reducing species can be precisely determined in the same  
solution by a single titration with several inflection points.  
Table 2 lists suitable titrants for different unknowns, the  
equation for the titration reaction, interferences, and a reference  
where information about preparing the sample and running the  
titration can be found. For similar information about unknowns  
not listed in the table, consult the standard texts listed as  
references.  
The following is a general procedure for performing a redox  
titration once the sample is prepared.  
1. Fill a 10 mL buret with a standard titrant solution whose  
normality is 5-10 times that of the sample.  
2. Connect the electrode to the meter and set the meter to  
the mV mode.  
3. Pipet 50 mL of sample into a 150 mL beaker. Stir the  
solution thoroughly throughout the titration.  
4. At first, add titrant in 0.5 to 1 mL increments, recording the  
potential after each addition. Near the endpoint, when large  
potential changes appear, add increments of 0.1 to 0.2 mL.  
Continue the titration 3 to 4 mL past the endpoint.  
5. Plot the electrode potential versus volume of added titrant  
on linear graph paper and draw a smooth curve through the  
points. The endpoint is the point of inflection (the point of  
greatest slope).  
ꢀ0  
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6. Calculate the normality of the sample, Nx, in equivalents per  
liter.  
Nx = (Vt * Nt) / Vx  
where:  
Nt = normality of titrant (Eq/1)  
Vt = volume of titrant at end point (mL)  
Vx = volume of sample (mL)  
Table 2 References:  
1. Furman (ed.), Scotts Standard Methods of Chemical  
Analysis, 5th Ed., Van Nostrand, Princeton, N.J. 1938.  
2. Hillebrand, Lundell, Bright, and Hoffman, Applied Inorganic  
Analysis, 2nd Ed., Wiley, New York, 1953.  
3. Kolthoff and Sandell, Testbook of Quantitative Inorganic  
Analysis, 3rd. Ed., MacMillan, New York, 1952.  
4. Oesper, Newer Methods of Volumetric Chemical Analysis,  
Van Nostrand, Princeton, N.J., 1938.  
5. Treadwell and Hall, Analytical Chemistry,” vol. 2,  
Quantitative Analysis, 8th Ed., Wiley, New York, 1935.  
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Table 2– Typical RedoxTitration Methods  
Unknown  
Interferences  
antimony (Sb+3  
)
As, Fe, SO2,V, and organic  
substances  
arsenic (As+3  
)
other reducing agents  
hydrogen peroxide  
(H2O2)  
preservatives present in commercial  
H2O2 may interfere  
hypochlorite ion (ClO¯) Br2 and other oxidizing agents  
or chlorine (Cl2)  
iodine (I2)  
interfere by liberating I2  
other reducing agents  
iodine (I2)  
direct sunlight, high acidity, copper  
salts and other catalysts promote air  
oxidation and cause false high results  
iron (as Fe+2, Fe+3  
or in steel)  
high levels of organic acids, such as  
acetic, oxalic, tartaric, and alcohols;  
F¯ if present in more than trace  
amounts; Cl¯, PO4-3 (remove by  
adding acid)  
iron (as Fe+2, Fe+3  
or in steel)  
other reducing agents  
manganese (as  
permanganate Mn04 )  
manganese (as Mn+2  
other oxidizing agents  
other reducing agents  
other reducing agents  
¯
)
stannous tin (Sn+2  
)
sulfur (as sulfur  
dioxide SO2)  
S-2 and SO2-2 , remove by shaking  
with CdCO3 and filtering  
thallium (Ti+)  
other reducing agents  
thiosulfate ion  
S-2 and SO2 -2 , remove by shaking  
with CdCO3 and filtering  
-2  
(S2O3  
)
uranium (as uranyl ion other reducing agents  
UO+2  
)
Zinc (Zn+2  
)
other reducing agents  
ꢀꢁ  
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SuitableTitrants  
Titration Reaction  
Ref  
potassium permanganate 5Sb+3 + 2MnO4¯ + 16H+ –›  
2
(KMnO4)  
5Sb+3 + 2Mn+2 + 8H2O  
sodium bromate (NaBrO3) BrO3¯ + 3As+3 + 6H+ –›  
Br¯ + 3As+5 + 3H2O  
3
5
1
potassium permanganate 5H2O2 + 2MnO4¯ + 6H+ –›  
(KMnO4)  
5O2 + 2Mn+2 + 8H2O  
sodium iodide (NaI)  
in acid solution Cl2 +2I¯ –› I2 +  
2Cl¯, In basic solution  
2ClO¯ + 2I¯ –› I2 + 2Cl¯ + 2OH¯  
sodium iodate ( NaIO3)  
2I2 + IO3¯ + 5HCN + H+ –›  
5ICN + 3H2O  
4
3
-2  
sodium thiosulfate  
(Na2S2O3)  
I2 + 2S2O3 -2 –› 2I¯ + S4O6  
ceric sulfate [Ce(SO4)2]  
(not recommended for  
samples containing Cl¯)  
Fe+2 + Ce+4 –› Ce+3 + Fe+3  
2
3
potassium dichromate  
(K2Cr3O7), recommended  
for samples containing Cl¯  
Cr2O7 -2 + 6Fe+2 + 14H+ –›  
2Cr+3 + 6Fe+3 + 7H2O  
ferrous sulfate (FeSO4)  
MnO4¯ + 5Fe+2 + 8H+ –›  
Mn+2 + 5Fe+3 + 4H2O  
2
1
potassium permanganate 3Mn+2 + 2MnO4¯ + 7H2O –›  
(KMnO4)  
5MnO3 + H2O + 4H+  
ceric sulfate [Ce(SO4)2]  
iodine (I2)  
Sn+2 + 2Ce+4 –› Sn+4 + 2Ce+3  
4
1
SO2 + I2 + 2H2O –›  
SO4-2 + 2I¯ + 4H+  
sodium bromate (NaBrO3) BrO3¯ + 3Ti+ 6H+ –›  
Br¯ + Ti+3 + 3H2O  
3
3
3
2
Iodine (I2)  
I2 + 2S2O3 -2 –› 2I¯ + S4O6  
potassium dichromate  
(K2Cr2O7)  
3UO+2 + Cr2O7 -2 + 8H+ –›  
3UO2 +2 + 2Cr+3 + 4H2O  
sodium iodate (NaIO3)  
ZnHg(SCN)4 + 6IO3¯ + 6Cl¯ +  
8H+ –› Zn+2 + Hg+2 + 6ICl +  
4HCN + 4SO4  
-2  
Redox/ORP Electrode User Guide  
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Electrode Maintenance  
1. Inspect the electrode for scratches, cracks, salt crystal  
buildup, or membrane/junction deposits.  
2. Rinse off any salt buildup with distilled water. Remove any  
membrane/junction deposits as directed in the General  
Cleaning section.  
3. If the electrode is refillable, drain the reference chamber,  
flush it with fresh filling solution and refill the chamber with  
fresh filling solution.  
4. If the electrode is refillable, make sure that the filling  
solution does not crystallize or dry out. Remove any  
crystals by rinsing the electrode with distilled water  
or wiping with a damp, lint-free tissue. To prevent  
crystallization of the filling solution, cover the fill hole  
whenever the electrode is being stored and open the fill  
hole when calibrating and measuring.  
ꢀꢃ  
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Electrode Cleaning Procedures  
General Cleaning  
1. Soak the electrode in 0.1 M HCl or HNO3 for half an hour.  
The electrode can also be soaked for 15 minutes in a 1:10  
dilution of household laundry bleach or a 0.1 to 0.5% liquid  
detergent solution mixed with hot water. The solution  
should be stirred at a moderate to fast rate.  
2. If the electrode is refillable, drain the reference chamber  
and refill it with fresh filling solution.  
3. Thoroughly rinse the electrode with distilled water.  
Cleaning Solutions  
Cat. No. 900021– pH cleaning solution A for removing protein  
contaminants.  
Cat. No. 900022– pH cleaning solution B for removing bacterial  
contaminants.  
Cat. No. 900023– pH cleaning solution C for general cleaning.  
Cat. No. 900024– pH cleaning solution D for removing oil and  
grease contaminants.  
Cat. No. 900020– pH cleaning solution kit, includes cleaning  
solutions A, B, C and D.  
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Sure-Flow Electrode Cleaning  
Cat. No. ꢈꢅꢆꢇBNWP and ꢈꢅꢆꢇ00  
If the area between the electrode sleeve and inner cone  
becomes clogged with sample or precipitate, flush the area with  
filling solution or distilled water.  
1. Hold the electrode body with one hand and use your thumb  
to push down on the electrode cap to drain the chamber.  
Push down on the cap until all the filling solution is drained  
from the chamber.  
2. Fill the electrode with distilled water and then push down  
on the cap until all the water is drained from the chamber.  
3. Fill the electrode with fresh filling solution up to the fill  
hole. Push down on the cap to allow a few drops of filling  
solution to drain out of the electrode and then refill any lost  
filling solution.  
Disassembling the Sure-Flow Electrode  
Note: Disassembly is usually not required and should not be  
done unless a thorough cleaning is required.  
1. Tip the electrode so the filling solution moistens the O-ring  
on the electrode body. Hold the electrode body with one  
hand and use your thumb to push down on the electrode  
cap to drain the chamber.  
2. Unscrew the cap counter clock-wise and then slide the cap  
and the spring up the cable.  
3. Hold the outer sleeve with one hand and firmly push down  
on the threaded portion with the thumb and forefinger to  
separate the inner body from the sleeve.  
4. Grasp the cone with a clean, lint-free tissue and withdraw  
the body from the sleeve using a gentle twisting motion.  
Do not touch the pellet above the cone, it will damage to  
the pellet. Rinse the outside of the electrode body and the  
entire sleeve with distilled water. Allow it to air dry.  
ꢀꢅ  
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Reassembling the Sure-Flow Electrode  
1. Moisten the O-ring on the electrode body with a drop of  
filling solution. Insert the screw-thread end of the electrode  
body into the tapered, ground end of the sleeve.  
2. Push the body into the sleeve using a gentle twisting  
motion until the bottom surface of the inner cone is flush  
with the tapered end of the sleeve.  
3. Place the spring onto the electrode body and screw on the  
cap. Refill the electrode with filling solution.  
Electrode Storage  
Short-term Storage (up to one day)  
To ensure a quick response and free-flowing junction, the  
reference junction must not dry out. It is recommended that  
the electrode be soaked in a 4 M potassium chloride (KCl)  
solution. Electrodes may also be stored in water.  
Long-term Storage (over one day)  
For gel-filled electrodes– rinse the electrode with distilled  
water, dry the electrode with a lint-free tissue and cover the  
measuring surface with the protective cap.  
For refillable electrodes– rinse the electrode with distilled  
water, drain all of the filling solution from the electrode, flush  
out the electrode with distilled water, cover the measuring  
surface with the protective cap and store the electrode dry.  
Redox/ORP Electrode User Guide  
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Troubleshooting  
Follow a systematic procedure to isolate the problem. The  
measuring system can be divided into four components for ease  
in troubleshooting: meter, electrode, sample/application  
and technique.  
Meter  
The meter is the easiest component to eliminate as a possible  
cause of error. Thermo Scientific Orion meters include  
an instrument checkout procedure and shorting cap for  
convenience in troubleshooting. Consult the pH meter user  
guide for directions.  
Electrode  
1. Thoroughly rinse the electrode with distilled water.  
2. Place electrode in the Orion ORP standard and wait until  
the reading stabilizes.  
3. The mV potential should be 220 mV 60 mV. If the mV  
reading is out of range, repeat the measurement with  
fresh ORP standard. If the electrode fails this procedure,  
clean the electrode thoroughly as directed in the Electrode  
Maintenance section. If the electrode response is slow  
or drifting and the electrode is refillable, drain and refill the  
electrode with fresh filling solution. Replace the electrode  
if cleaning and maintenance fail to rejuvenate it.  
Sample/Application  
The electrode and meter may operate with standards, but not  
with the sample. In this case, check the sample composition for  
interferences, incompatibilities or temperature effects.  
Technique  
If trouble persists, review operating procedures. Review  
calibration and measurement sections to be sure proper  
technique has been followed.  
ꢀꢇ  
Redox/ORP Electrode User Guide  
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Checking Electrode Operation  
Checking the electrode is necessary only when there is  
evidence of malfunction that cannot be traced to other causes.  
Fill the electrode with Cat. No. 900011 lling solution for this  
testing procedure.  
1. Prepare solution A (0.1 M potassium ferrocyanide and 0.05  
M potassium ferricyanide): weigh out 4.22 g reagent-grade  
K4Fe(CN)6•3H20) and 1.65 g reagent-grade K3Fe(CN)6. Place  
in a 100 mL volumetric flask. Add about 50 mL distilled  
water and swirl to dissolve solids. Dilute to volume with  
distilled water.  
2. Prepare solution B (0.01 M potassium ferrocyanide, 0.05  
M potassium ferricyanide and 0.36 M potassium fluoride):  
weigh out 0.42 g reagent-grade K4Fe(CN)6•3H20), 1.65 g  
reagent-grade K3Fe(CN)6 and 3.39 g reagent-grade  
KF•2H2O. Place in a 100 mL volumetric flask. Add 50 mL  
distilled water and swirl to dissolve solids. Dilute to volume  
with distilled water.  
3. Transfer solution A to a 150 mL beaker. Place the electrode  
in the solution and wait until the reading stabilizes. The  
potential should be about 234 mV.  
4. Transfer solution B to a 150 mL beaker. Rinse the electrode  
and then place it in the solution and wait until the reading  
stabilizes. The potential should be about 66 mV greater in  
solution B than in solution A.  
Assistance  
After troubleshooting all components of your measurement  
system, contact Technical Support. Within the United States call  
1.800.225.1480 and outside the United States call 978.232.6000  
or fax 978.232.6031. In Europe, the Middle East and Africa,  
contact your local authorized dealer. For the most current  
Warranty  
For the most current warranty information,  
Redox/ORP Electrode User Guide  
ꢀꢈ  
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Ordering Information  
Cat. No.  
Description  
9179BNMD  
Low maintenance gel ORP/ATC Triode with  
epoxy body and waterproof BNC and 8 pin  
MiniDIN connectors  
9179BN  
Low maintenance gel ORP/ATC Triode with  
epoxy body and BNC and 8 pin DIN connectors  
9180BNMD  
9180BN  
Refillable ORP/ATC Triode with epoxy body and  
waterproof BNC and 8 pin MiniDIN connectors  
Refillable ORP/ATC Triode with epoxy body and  
BNC and 8 pin DIN connectors  
9678BNWP  
967800  
Sure-Flow refillable ORP/redox electrode with  
epoxy body and waterproof BNC connector  
Sure-Flow refillable ORP/redox electrode with  
epoxy body and U.S. standard connector  
9778BNWP  
9778SC  
Refillable ORP/redox electrode with glass body  
and waterproof BNC connector  
Refillable ORP/redox electrode with glass body  
and screw cap connector  
900011  
ORP electrode filling solution, for samples that  
have a total ionic strength greater than 0.2 M,  
5 x 60 mL bottles  
900001  
ORP electrode filling solution, for samples that  
have a total ionic strength less than 0.2 M,  
5 x 60 mL bottles  
967901  
967961  
910001  
ORP standard, 475 mL bottle  
ORP standard, 5 x 60 mL bottles  
4 M KCl storage solution, 475 mL bottle  
ꢁ0  
Redox/ORP Electrode User Guide  
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Thermo Fisher Scientific  
Environmental Instruments  
Water Analysis Instruments  
166 Cummings Center  
Beverly, MA 01915 USA  
Tel: 978-232-6000  
Toll Free: 800-225-1480  
Dom. Fax: 978-232-6015  
Int’l. Fax: 978-232-6031  
254794-001 Rev.A  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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