YSI 4210 ORP User Manual

OPERATIONS MANUAL

ba76138e01 02/2013

4210

ORP ELECTRODE

4210

For the most recent version of the manual, please visit www.ysi.com.

Contact YSI

1725 Brannum Lane
Yellow Springs, OH 45387 USA
Tel: [phone]

800-765-4974
Email: [e-mail]
Internet: www.ysi.com

Copyright © 2013 Xylem Inc.

2 ba76138e01 02/2013

4210 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. The data is recalled by the meter when the sensor is
connected and is used for measurement and for measured value documen­tation.

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.

Technical data

General data Reference electrolyte 3 mol/l KCl, Ag+free

Junction Ceramic

Measurement and

application

characteristics

Electrode material and
shape

mV measuring range - 1250.0 ... + 1250.0

Allowed temperature range 0 ... 100 °C (32 ... 212 °F)

Typical application Laboratory

Platinum / circle

Shaft dimensions,

material, electrical

connection

Connection cable Length 1.5 m

Accuracy of the

IDS measuring

technique

Shaft length 120 mm

Shaft diameter 12 mm

Shaft material Glass

Combination electrode con­nection

Meter connection Digital plug

Diameter 4.3 mm

Smallest allowed bend
radius

Plug type Socket, 4 pins

Measured parameter Accuracy (± 1 digit)

U [mV] ± 0.2

Fixed cable

Fixed installation: 20 mm
Flexible use: 60 mm

ba76138e01 02/2013

3

Commissioning, measuring, checking 4210

Refilling
opening

Commissioning, measuring, checking

Note

For ORP electrodes with platinum electrode, please follow the instructions in
section A

Commissioning Prepare 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 measurement!

CTIVATING PLATINUM ELECTRODES.

General rules for

measuring

 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.

 Connect the combination electrode to the meter.

 Measure with 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 sample solution from one measurement to the next

as follows:

– Shortly rinse the 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.

 Immerse the electrode in the solution in a vertical or slightly tilted position.

4

 Make sure the immersion depth is correct. The junction must be complete-

ly submersed in the solution. The junction is in the area of the bottom end
of the shaft (see arrow).

ba76138e01 02/2013

4210 Commissioning, measuring, checking

4210

At the same time, the level of the reference electrolyte must be at least 2
cm above the level of the solution.

Conversion to

normal hydrogen

electrode

T (°C) T (°F) U

0 32 +224 35 95 +200

5 41 [phone] +196

10 50 [phone] +192

15 59 [phone] +188

U

= U

H

with: U

Meas

H

U

Meas

U

Ref

+ U

Ref

= ORP, referring to the normal hydrogen electrode

= Measured ORP

= Voltage of the reference system compared to the normal

hydrogen electrode

U

is temperature dependent and can be taken from the following table (see

Ref

also DIN 38404-6):

[mV] T (°C) T (°F) U

Ref

Ref

[mV]

4210 4210

20 68 [phone] +184

25 77 [phone] +180

30 86 +203

ba76138e01 02/2013

5