YSI IDS 4120 User Manual
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
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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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