OPERATIONS MANUAL
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4120 / 4130
PH COMBINATION ELECTRODES WITH REFILLABLE LIQUID REFERENCE SYSTEM
4120 / 4130
For the most recent version of the manual, please visit www.ysi.com.
Contact YSI
1725 Brannum Lane
Yellow Springs, OH 45387 USA
Tel: +1 937-767-7241
800-765-4974
Email: environmental@ysi.com
Internet: www.ysi.com
Copyright © 2013 Xylem Inc.
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4120 / 4130 General information
General information
Automatic sensor
recognition
The sensor electronics with the stored sensor data is in the connecting head
of the electrode. The data include, among other things, the sensor type and
series number. With each calibration, the calibration data is written in the
sensor and the calibration history is recorded. The data is recalled by the
meter when the sensor is connected and is used for measurement and for
measured value documentation. Storing the calibration data in the sensor
ensures that the correct slope and asymmetry are automatically used if the
sensor is operated with several meters.
The digital transmission technique guarantees the failure-free communication with the meter even with long connection cables. If the sensor firmware
is enhanced by YSI, it can be updated via the meter.
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Technical data 4120 / 4130
Technical data
General data
Model Reference electrolyte Junction NTC Special features
4120 KCl 3 mol/l, Ag
4130 KCl 3 mol/l, Ag
Measurement and application characteristics
Model pH measuring range Allowed temperature
4120 0.000 ... 14.000 0 ... 80 °C (32 ... 176 °F)
4130 0.000 ... 14.000 0 ... 100 °C
+
free Ceramic Yes Plastic shaft
+
free Platinum Yes
range
(32 ... 212 °F)
Model Membrane resistance
at 25 °C
4120 < 1 GOhm Field
4130 < 600 MOhm Laboratory
Typical application
Shaft dimensions, shaft material, electrical connection
Model Shaft Electrical connection
Length
[mm]
4120 120 12 Polyamide Fixed cable Digital plug 1.5 m
4130 120 12 Glass Fixed cable Digital plug 1.5 m
Ø [mm] Material Electrode
connection
Meter connection
Cable
length
Connection cable
Diameter 4.3 mm
Smallest allowed bend radius Fixed installation: 20 mm
Flexible use: 60 mm
Plug type Socket, 4 pins
Accuracy of the IDS measuring technique
Measured parameter Accuracy (± 1 digit)
pH ± 0.004
U [mV] ± 0.2
T [°C] ± 0.1
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4120 / 4130 Commissioning, measuring, calibration
Refilling
opening
Refilling
opening
2
1
Commissioning, measuring, calibration
Commissioning The electrode is filled with reference electrolyte solution in the factory. Pre-
pare the electrode for measuring as follows:
Open the refilling opening for the reference electrolyte solution. Depend-
ing on the model, the stopper of the refilling opening is an elastomer stopper or a slider.
The refilling opening must always be open during calibration and
measurement!
Calibration
and measurement:
General rules
Remove the watering cap from the electrode tip. Possible salt deposits in
the area of the watering cap do not affect the measuring characteristics
and can easily be removed with deionized water.
Note
Please keep the watering cap. It is required for the electrode to be stored.
Always keep the watering cap clean.
4120: Remove any gas bubbles behind the pH membrane by shaking.
Connect the electrode to the meter.
Calibrate the electrode according to the operating manual of the meter
and observe the following rules while doing so:
Make sure the refilling opening for the reference electrolyte solution is
open.
Avoid the carryover of any solution (sample or buffer solution) from one
measurement to the next by taking the following measures:
– Shortly rinse the calibration and sample beakers with the solution the
beakers are to be filled with next.
– Between measurements, rinse the electrode with the solution that fol-
lows. Alternatively, you can also rinse the electrode with deionized water and then carefully dab it dry.
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Immerse the electrode in the solution in a vertical or slightly tilted position.
Make sure the immersion depth is correct. The junction must be completely submersed in the solution. The junction is in the area of the bottom end
of the shaft (see figure). At the same time, the level of the reference elec-
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Storage 4120 / 4130
Junction
Referenceelectrolyte
(Example)
Glass membrane
Shaft
trolyte in the electrode must be at least 2 cm above the level of the solution.
Provide approximately the same stirring conditions for measuring as for
calibrating.
Note
Prevent contact of the pH membrane to the beaker bottom to avoid scratches
on the pH membrane.
Subsequent
calibrations
During short
measuring breaks
Overnight or
longer
The frequency of subsequent calibrations depends on the application. The
meters provide an option where you can enter a calibration interval. After the
calibration interval has expired, the meter will automatically remind you of the
due calibration.
Storage
With the refilling opening open, immerse the electrode in reference
electrolyte (KCl 3 mol/l, Ag
rinse the electrode with the test sample or deionized water.
Note
Prevent contact of the pH membrane to the beaker bottom to avoid scratches
on the pH membrane.
Put the clean electrode in the watering cap that is filled with reference
electrolyte (KCl 3 mol/l, Ag
Note
pH electrodes must not be stored dry or in deionized water. The electrode
could be permanently damaged by this. If the liquid in the watering cap has
dried up, condition the electrode in reference electrolyte (KCl 3 mol/l,
+
Ag
free) for at least 24 hours.
+
free). Prior to the next measurement, shortly
+
free) and close the refilling opening.
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4120 / 4130 Aging
Note
During longer storing periods, salt sediments may develop on the watering
cap. They do not affect the measuring characteristics and can easily be removed with deionized water when the electrode is put into operation again.
Aging
Every pH electrode undergoes a natural aging process. With aging, the responding behavior becomes slower and the electrode slope and asymmetry
change. Moreover, extreme operating conditions can considerably shorten
the lifetime of the electrode. These are:
Strong acids or lyes, hydrofluoric acid, organic solvents, oils, fats, bro-
mides, sulfides, iodides, proteins
High temperatures
High changes in pH and temperature.
The warranty does not cover failure caused by measuring conditions and
mechanical damage.
Refilling the
reference
electrolyte
Maintenance and cleaning
During operation, a small amount of reference electrolyte leaks through the
junction from the electrode into the test sample. If the level of reference electrolyte becomes too low with time, refill it through the refilling opening. Refilling is very easy with the enclosed dropping bottle. Proceed as follows:
Cut off the tip of the dropping bottle at a right angle until the opening in the
tip can be seen
Open the refilling opening of the electrode
Press the tip of the dropping bottle into the refilling opening while turning
it slightly
Pump the reference electrolyte in the shaft using the dropping bottle
Pull the dropping bottle out of the refilling opening while turning it slightly
as necessary.
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Maintenance and cleaning 4120 / 4130
Cleaning Remove water-soluble contamination by rinsing with deionized water. Re-
move other contamination as follows:
Contamination Cleaning procedure
Fat and oil Rinse with water containing household wash-
ing-up liquid
Lime and hydroxide deposits Rinse with citric acid (10 % by weight)
Note
Hydrofluoric acid, hot phosphoric acid and strong alkaline solutions destroy
the glass membrane.
After cleaning Rinse the electrode with deionized water and condition it in reference
electrolyte solution for at least 1 hour. Then recalibrate the electrode.
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4120 / 4130 Wear parts and accessories
Wear parts and accessories
Description Model Order no.
Reference electrolyte solution 250 mL
(KCl 3 mol/l, Ag
+
free)
KCl-250 109 705Y
Disposal
When the electrode is at the end of its operational lifetime, please dispose of
it as electronic waste and not with unsorted municipal waste. It is illegal to
dispose of it with the household refuse.
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Disposal 4120 / 4130
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4120 / 4130 Contact Information
Contact Information
Ordering & Technical Support
Telephone
Fax
: (937) 767-1058
Email
Mail: YSI Incorporated
Internet
When placing an order please have the following information available:
YSI account number (if available) Name and Phone Number
Model number or brief description Billing and shipping address
Quantity Purchase Order or Credit Card
: (800) 897-4151
(937) 767-7241
Monday through Friday, 8:00 AM to 5:00 PM ET
: environmental@ysi.com
1725 Brannum Lane
Yellow Springs, OH 45387
USA
: www.ysi.com
Service Information
YSI has authorized service centers throughout the United States and
Internationally. For the nearest service center information, please visit
www.ysi.com
directly at 800-897-4151.
When returning a product for service, include the Product Return form
with cleaning certification. The form must be completely filled out for an
YSI Service Center to accept the instrument for service. The Product
Return form may be downloaded at www.ysi.com
‘Support‘ tab.
and click ‘Support’ or contact YSI Technical Support
and clicking on the
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Contact Information 4120 / 4130
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1) The tissue in plants that brings water upward from the roots;
2) a leading global water technology company.
We're 12,500 people unified in a common purpose: creating innovative solutions
to meet our world's water needs. Developing new technologies that will improve
the way water is used, conserved, and re-used in the future is central to our work.
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use water efficiently, in their homes, buildings, factories and farms. In more than
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expertise, backed by a legacy of innovation.
For more information on how Xylem can help you, go to www.xyleminc.com
Xylem |' m|zīlə
YSI
1725 Brannum Lane
Yellow Springs, OH 45387
Tel: +1 937-767-7241; 800-765-4974
Fax: +1 937-767-1058
Email: environmental@ysi.com
Web: www.ysi.com
©Xylem Inc
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