Oakton PC260, PC250 Instruction Manual

PC250
PC260

pH/ORP/CONDUCTIVITY METER

Preface

This manual describes the operation of the following instrument.

Brand: OAKTON

Series name: OAKTON 200 series Handheld Water Quality Meter

Model: PC250, PC260

Model description: pH/ORP/Conductivity Meter

Be sure to read this manual before using the product to ensure proper and safe operation of
the product. Also, safely store the manual so it is readily available whenever necessary.
Product specifications and appearance, as well as the contents of this manual are subject to
change without notice.

• Warranty and responsibility

Oakton Instruments. warrants that the product shall be free from defects in material and
workmanship and agrees to repair or replace free of charge, at option of Oakton Instruments.,
any malfunctioned or damaged product attributable to responsibility of Oakton Instruments. for
a period of Three (3) years from the delivery unless otherwise agreed in a written statement. In
any one of the following cases, none of the warranties set forth herein shall be extended:

• Any malfunction or damage attributable to improper operation

• Any malfunction attributable to repair or modification by any person not authorized by Oak­ton Instruments.

• Any malfunction or damage attributable to the use in an environment not specified in this
manual

• Any malfunction or damage attributable to violation of the instructions in this manual or
operations in the manner not specified in this manual

• Any malfunction or damage attributable to any cause or causes beyond the reasonable
control of Oakton Instruments. such as natural disasters

• Any deterioration in appearance attributable to corrosion, rust, and so on

• Replacement of consumables

Oakton Instruments. SHALL NOT BE LIABLE FOR ANY DAMAGES RESULTING FROM ANY
MALFUNCTIONS OF THE PRODUCT, ANY ERASURE OF DATA, OR ANY OTHER USES OF
THE PRODUCT.

• Trademarks

• Microsoft, Windows, Windows Vista are registered trademarks or trademarks of Microsoft

Corporation in the United States and other countries.

Other company names and brand names are either registered trademarks or trademarks of the
respective companies. (R), (TM) symbols may be omitted in this manual.

CODE:M003811-3200828208-GZ0000581081

November,2019 © 2019 Oakton Instruments.

I

Regulations

• Regulations

• EU regulations

• Conformable standards

This equipment conforms to the following standards:

EMC: EN61326-1

RoHS: EN50581

Warning: This product is not intended for use in industrial environments. In an
industrial environment, electromagnetic environmental effects may
cause the incorrect performance of the product in which case the
user may be required to take adequate measures.

Class B, Basic electromagnetic environment

9. Monitoring and control instruments

• Information on disposal of electrical and electronic equipment and disposal of batteries and accumulators

The crossed out wheeled bin symbol with underbar shown on the product or accompanying

documents indicates the product requires appropriate treatment, collection and recycle for
waste electrical and electronic equipment (WEEE) under the Directive 2012/19/EU, and/or

waste batteries and accumulators under the Directive 2006/66/EC in the European Union.
The symbol might be put with one of the chemical symbols below. In this case, it satisfies
the requirements of the Directive 2006/66/EC for the object chemical. This product should not

be disposed of unsorted household waste. Your correct disposal of WEEE, waste batteries and

accumulators will contribute to reducing wasteful consumption of natural resources, and

protecting human health and the environment from potential negative effects caused by

hazardous substance in products.
Contact your supplier for information on applicable disposal methods.

II

Regulations

• Authorised representative in EU

Cole-Parmer UK

9 Orion Court, Ambuscade Road

Colmworth Business Park

St Neots

Cambridgeshire

PE19 8YX, United Kingdom

Phone: [phone]

Fax: [phone]

• FCC rules

FCC Compliance Statement

This device complies with part 15 of the FCC Rules. Operation is subject to the following two

conditions: (1) This device may not cause harmful interference, and (2) this device must accept

any interference received, including interference that may cause undesired operation.

Responsible Party for FCC matter

Oakton Instruments

625 East Bunker Court,

Vernon Hills, IL, 60061, USA

Tel: [phone]

Note

This equipment has been tested and found to comply with the limits for a Class A digital device,

pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable

protection against harmful interference when the equipment is operated in a commercial

environment. This equipment generates, uses, and can radiate radio frequency energy and, if

not installed and used in accordance with the instruction manual, may cause harmful

interference to radio communications. Operation of this equipment in a residential area is likely

to cause harmful interference in which case the user will be required to correct the interference

at his own expense.

Any changes or modifications not expressly approved by the party responsible for compliance

could void the user's authority to operate the equipment.

III

For Your Safety

• For Your Safety

• Hazard classification and warning symbols

Warning messages are described in the following manner. Read the messages and follow the

instructions carefully.

• Hazard classification

This indicates an imminently hazardous situation which, if not

avoided, will result in death or serious injury. This is to be
limited to the most extreme situations.

This indicates a potentially hazardous situation which, if not

avoided, could result in death or serious injury.

This indicates a potentially hazardous situation which, if not

avoided, may result in minor or moderate injury. It may also
be used to alert against unsafe practices.

• Warning symbols

Description of what should be done, or what should be

followed.

VI

Description of what should never be done, or what is

prohibited.

For Your Safety

• Safety precautions

This section provides precautions for using the product safely and correctly and to prevent

injury and damage. The terms of DANGER, WARNING, and CAUTION indicate the degree of
immanency and hazardous situation. Read the precautions carefully as it contains important
safety messages.

• Instrument and electrode

Do not disassemble or modify the instrument. Otherwise, it may heat up or be ignited

resulting in a fire or an accident.

Harmful chemicals

Some electrodes are used with hazardous standard solutions. Handle them with care.

The internal solution of pH electrode is highly concentrated potassium chloride (3.33
mol/L KCl). If the internal solution comes in contact with the skin, wash it off
immediately. If it gets into the eyes, flush with plenty of water and then consult a
doctor.

Broken glass

Broken glass may cause injury. The outer tube and tip of an electrode are made of

glass. Handle them with care.

Do not use the phono jack under wet or humid conditions. Otherwise, it may cause a

fire, electric shock, or breakage.

VII

For Your Safety

• Battery

Keep batteries out of reach of children. If someone accidentally swallows a battery,

consult a doctor immediately.

If alkaline fluid from a battery gets into the eyes, do not rub the eyes, rinse with clean

water immediately and then consult a doctor. Contact with alkaline fluid could cause
blindness.

Do not put batteries in a fire, expose to heat, disassemble or remodel.
Doing so can case fluid leakage, overheating or explosion.

VIII

Product Handling Information

• Product Handling Information

• Operational precautions (instrument)

• Only use the product including accessories for their intended purpose.

• Do not drop or physically impact the instrument.

• The instrument is made of solvent-resistant materials but that does not mean it is resistant
to all chemicals. Do not expose the instrument in strong acid or alkali solution, or wipe with
such solution.

• If the instrument is dropped into water or gets wet, wipe it using soft cloth. Do not heat to
dry it.

• The instrument has a dust-proof and waterproof structure i.e., the instrument does not
malfunction even when immersed in water of 1 m depth for 30 minutes. This does
guarantee non-destructive, trouble-free, dust-proof, and waterproof performance in all
situations.

• When replacing the batteries or when a serial cable connected, the instrument does not
have the dust-proof and waterproof performance. The dust-proof and waterproof
performance is maintained only when the covers are attached correctly.

• After replacing the batteries or removing the serial cable connected, make sure that the
waterproof gasket attached to the cover is not deformed or discolored, or has foreign
matter adhering to it. If the waterproof gasket is deformed, discolored or has foreign matter
adhering to it, dust could get inside, water leaks could occur that could lead to instrument
malfunction.

• To disconnect an electrode or serial cable, hold the connector and pull it off. If you pull at
the cable, it may cause breakage.

• The phono jack communication between the instrument and a personal computer (referred
to as PC in the rest of this document) may fail because of environmental conditions, such
as electromagnetic noise.

• Do not replace the batteries in a dusty place or with wet hands. Dust or moisture could get
inside the instrument, possibly causing instrument malfunction.

• Do not use an object with a sharp end to press the keys.

• If the power supply is interrupted while measurement data is being saved in the instrument,
the data could be corrupted.

• A NiMH rechargeable battery can be used in this instrument.

• Operational precautions (battery)

• Do not short circuit a battery.

• Position the + and  side of the battery correctly.

• When the battery has depleted or the instrument will not be used for a long time, remove

the batteries.

• Of the specified battery types, make sure to use two batteries of the same type.

• Do not use a new battery together with a used battery.

• Do not use a fully charged nickel-metal hydride battery together with a partially charged
battery.

• Do not attempt to charge a non-rechargeable battery.

IX

Product Handling Information

• Environmental conditions for use and storage

• Temperature: 0 °C to 45 °C

• Humidity: under 80% relative humidity and free from condensation

• Avoid the following conditions:

• Strong vibration

• Direct sunlight

• Corrosive gas environment

• Locations close to an air-conditioner

• Direct wind

• Transportation

When transporting the instrument, repackage it in the original package box. Otherwise, it may

cause instrument damage.

• Disposal

• Standard solution used for the calibration must be under neutralized before the disposal.

• When disposing of the product, follow the related laws and regulations of your country for
disposal of the product.

X

Contents

■ Product Overview .............................................................. 1

● Package Content........................................................ 1

● Key Features .............................................................. 2

● Product components................................................. 3

■ Basic operations................................................................ 7

● Mode and measurement............................................ 9

■ Calibration........................................................................ 11

● pH Calibration .......................................................... 11

● ORP/mV Calibration................................................. 13

● Conductivity Calibration ......................................... 15

● TDS calibration ........................................................ 18

● Salinity calibration................................................... 19

● Temperature Calibration ......................................... 21

■ Data................................................................................... 23

● Data capture and storage........................................ 23

● Data transfer............................................................. 24

■ Setup................................................................................. 25

● P1 pH setup .............................................................. 25

● P1 COND setup ........................................................ 29

● P2 TDS setup............................................................ 36

● Data setup ................................................................ 43

XI

Contents

● General setup........................................................... 50

● CLK setup................................................................. 59

■ Maintenance and storage ............................................... 64

● Maintenance and storage of the instrument ......... 64

● Maintenance and storage of electrodes ............... 65

■ Error messages and trouble shooting........................... 67

■ Appendix .......................................................................... 72

● Appendix 1 ............................................................... 72

● Appendix 2 ............................................................... 75

● Appendix 3 ............................................................... 80

XII

Product overview

1

2

3 5

4

■ Product Overview

This section describes the package content, key features and product components of OAKTON
200 series Handheld meters.

● Package Content

After opening the carry case, remove the meter and check for damage on the instrument and
confirm that the standard accessories all exist. If damage or defects are found on the product,
contact your dealer.
OAKTON PC200 series Handheld meters and meter kit include the following items:

S.NO. Name

1 Instrument

2 Instruction manual

3 2 AA batteries

4 Electrodes (Electrodes kit only)

5 Calibrating solutions

1

Product overview

● Key Features

• IP67 water ingress, dust-proof, shock-resistant, anti-slip meter housing.

• Large monochrome LCD (50 x 50 mm) with white LED back lighting.

• Built-in electrode holder (up to 2 electrodes).

• Foldable meter stand.

• Simple user interface and single parameter display.

• 500 (for PC250) / 1000 (for PC260) data memory.

• Automatic Temperature Compensation (ATC) with temperature calibration.

• Adjustable auto shut-off time (1 to 30 minutes).

• Auto-hold / Auto stable / Real-time measurement modes with stability indicators.

• Powered by 2 x AA batteries.

• Real-time clock (only for PC260).

• PC (standard USB) / Printer (25 pin serial) connection via 2.5 mm diameter phono jack.

2

Product overview

● Product components

No Name Function

1 Monochrome LCD Displays the measured value

2 Operation keys Used for instrument operation

3 Electrode connector Connect to the BNC connector of the electrode

4 Temperature connector (T) Connect to the temperature sensor of the electrode

5 Battery cover Open/close to insert/remove batteries

6 Electrode holder Hold the electrode to carry with the instrument

7 Meter stand

8 Serial connector Connects to the PC or printer with the appropriate cable

Open stand to place the meter at an inclined position on a
flat surface

3

Product overview

● Display

No Name Function

1 Status Icon

2 Parameters

3

4

Temperature display

5

area

Measured value, set

6

item display area

7

Displays the current operation mode (Setup, Calibration,
Measurement and Data mode)

Displays the measured parameters like pH, RmV, COND, Res,
TDS and Sal

Stability indicator shows value is stable for documentation in
Auto Stable and Auto Hold modes

Appears when the measured value display is stable and fixed in
auto-hold mode

Displays the measured temperature

Displays the measured value and the set value

Indicates electrode sensitivity level

8

9 Indicates data being transfered to the printer or computer

10 Displays the unit for the measurement parameter

11 Displays the battery level

Indicates error situation

4

Product overview

● Battery level display

100% battery life

50% battery life

20% battery life

Batteries are weak and need replacement. Refer “ BATT LOW ” (page 67) to
solve this

● pH Electrode sensitivity level

Electrode sensitivity above 95%(excellent)

Electrode sensitivity between 85% to 95% (very good)

Electrode sensitivity between 80% to 85%(good). Refer “ SLPE ERR ” (page

67) to solve this

5

Product overview

● Keypad operation

Keypad Name Function

CAL key

MEAS key

DATA key Switches from the measurement mode to the data mode.

MODE key In the measurement mode, changes measurement parameters.

SET key Switches from the measurement mode to the setup mode.

ENTER key

UP key

DOWN key

POWER key Powers ON/OFF the instrument.

Switches from the measurement mode to the calibration mode.
Starts calibration in the calibration mode.

Switches the operation mode to the measurement mode.
Releases the fixed measurement value mode in the auto hold
mode and begins a fresh measurement.

Determines the selection or setup.
Saves data in the measurement mode and calibration mode.

In the setup mode, navigates between various setups.
Selects preferred option in some setup screens.
Increases or decreases selected digit when entering numbers.

6

Basic operations

Note

■ Basic operations

This section describes function and basic operation method of each part of OAKTON PC200

series Handheld meters.

● Turning on the instrument

Inserting the batteries

This instrument is operated by batteries. You can use

AA alkaline batteries or AA Ni- MH chargeable
batteries. Perform the following procedure to insert
batteries in the instrument.

1. Unscrew the battery cover on the back of the
instrument counter-clock wise to unlock the bat­tery cover.

2. Remove the battery cover and set the batteries

inside.

3. Replace battery cover.

4 . S c r e w t h e b a t t e r y c o v e r o n t h e b a c k

of the instrument clockwise to lock the battery
cover.

• Do not replace the batteries in a dusty place or with wet hands. Dust or moisture could get
inside the instrument and possibly cause an instrument malfunction.

• Do not short-circuit a battery.

• Note polarity as shown in the battery compartment.

• When the battery has depleted or the instrument is not used for a long time, remove the
batteries.

• Of the specified battery types, make sure to use two batteries of the same type.

• Do not use a new battery together with an used battery.

7

Basic operations

Electrode connector

Temperature jack (T)

● Connecting an electrode

To perform calibration/ measurement, it is necessary to use the appropriate electrode for

measurement parameter. Recommended electrodes for various sample are listed in our
product catalog. Use the following procedure to correctly connect the electrode to the
instrument:

1. Insert the electrode connector by fitting its groove with the connector pin of the instrument (refer below table).

2. Turn the electrode connector clockwise by following the grooves.

3. Slide the connector cover on the connector.

4. When using a combination electrode equipped with a temperature sensor, insert the temperature jack (T) to the ATC socket on the meter.

CH1 CH2

pH Electrode Conductivity Electrode

8

Basic operations

● Mode and measurement

● Changing the operation mode

You can change the operation mode to four available modes depending on the purpose of use.

The status icon indicates the current mode.

Icon Name Function

Setup mode Perform various setup functions.

Calibration

mode

Measurement

mode

Data mode Performs data setup. Displays the saved data.

You can change the operation mode using the corresponding key:

• Measurement mode: Press the key to change to the measurement mode.

• Calibration mode: In the measurement mode, press the key to change to the

calibration mode.

• Data mode: In the measurement mode, press the key to change to the data mode.

• Setup mode: In the measurement mode, press the key to change to the setup mode.

Performs calibration.

Performs measurement.

9

Basic operations

● Changing the measurement parameter

This instrument measures multiple parameters. For measurement, an electrode corresponding

to the measurement parameter is required. In the measurement mode, the measurement

parameter can be changed by pressing the key.

10

pH calibration

Note

Tip

■ Calibration

This section describes the basic calibration method using OAKTON PC200 series Handheld
meters, pH and conductivity electrode.

● pH Calibration

Calibration is necessary for accurate pH measurement. To perform pH calibration, follow the
procedure detailed below:

Prerequisites

• Clean the pH electrode with DI (deionized) water and wipe it with tissue paper.

• Switch on the PC meter and plug in the pH electrode.

• Prepare buffer solution required for calibration.

• Keep the meter in pH measurement mode.

• Dip the pH electrode at least 3 cm in the calibration solution.

• Perform two-point calibration using:
pH 7 and 4 for acidic sample.
pH 7 and 10 for alkaline sample.

• Perform three-point calibration using pH7, 4 and 10 if you are unsure of the expected

sample pH value. It is recommended to calibrate with pH7 first.

• Default buffer setup is BUFF USA. If you want to change to BUFF NIST or BUFF DIN,

refer to “P 1.1 Buffer selection” on page 26.

• To abort an ongoing calibration process at any point of time, press the key.

• It is recommended to clear the previous calibration data before performing calibration. For

erasing the calibration data, refer to “P 1.3 Erase calibration data” on page 28.

11

pH calibration

Note

Calibration

5. After placing the pH electrode in the buffer solution, press the key.

6. The selected buffer standard appears on the meter screen and meter starts checking

various calibration values with a blinking on screen.

7. Wait for the to stabilize (stable calibration reading).

8. Press the ENT key to confirm and save calibration data.

9. Meter displays DONE indicating end of the pH calibration procedure.

If you want to know previous calibrated values, press the key when you are in the CAL

mode.The display scrolls through the calibrated values and indicates slope and offset values.

12

ORP calibration

Note

Tip

● ORP/mV Calibration

Calibration is necessary for accurate ORP measurement. To perform ORP calibration, follow

the procedure detailed below:

Prerequisites

• Clean the ORP electrode with DI (deionized) water and wipe it with tissue paper.

• Switch on the PC meter and plug in the ORP electrode.

• Prepare standard solution required for calibration.

• Ensure that the meter is in mV measurement mode.

• Dip the ORP electrode into the standard solution ensuring that the solution level is at least

3 cm from the electrode tip.

• Absolute value measurement mode and relative value measurement mode are the two

types of measurement mode available for ORP (mV) measurement.

• In absolute value measurement mode, the handheld meter displays the actual voltage

value.

• In relative value measurement mode, user can adjust the absolute mV value by calibration.

If the mV value is adjusted, the meter automatically indicates relative mV value as RmV.
The adjustment mV is applied as an offset to the absolute mV value.

• In the relative mV mode, the absolute mV value can be adjusted by ± 200 mV.

To abort an ongoing calibration process at any point of time, press the key.

13

ORP calibration

Calibration

10. After placing the electrode in the solution, press the key to switch to mV mode.

11. Press the key.

12. Meter starts reading mV values and the blinks until value stabilizes.

13. Wait for the to stabilize (stable calibration reading).

14. Use the keys to adjust the mV value to your desired value.

15. Press the ENT key to confirm and save calibration data.

16. Meter displays DONE that indicates end of the ORP/mV calibration procedure.

14

Conductivity calibration

Note

Tip

● Conductivity Calibration

Calibration is necessary for accurate electrical conductivity measurement. To perform
conductivity calibration, follow the procedure detailed below:

Prerequisites

• Clean the conductivity electrode with DI (deionized) water and wipe it with tissue paper.

• Switch on the PC meter and plug in the conductivity electrode.

• Prepare standard solution required for calibration.

• Press the key to keep the meter in COND mode.

• Dip the conductivity electrode in the standard solution till the hole at the upper part of the

electrode is immersed.

• Salinity, TDS, and resistivity of a sample solution are calculated from the measured value

of conductivity.

• In conductivity calibration mode, the default calibration method is Auto calibration. If you

like to change it to manual calibration method, refer “P 1.3 calibration mode setup” on
page 32.

• For second or multiple point calibration, clean the conductivity electrode with DI water and

follow the same procedure.

• If you are performing multiple point calibration, calibrate to the lowest conductivity first and

then move to increasing conductivity values. This minimizes cross contamination.

• To abort an ongoing calibration process at any point of time, press the key.

15

Conductivity calibration

Calibration

Auto calibration

17. After placing the conductivity electrode in the standard solution, press the key.

18. Meter displays “Auto cal” as per set calibration method and starts measuring various

calibration values with a blinking on screen.

19. Wait for the to stabilize (stable calibration reading).

20. Press the ENT key to confirm and save calibration data.

21. Meter displays DONE indicating end of the conductivity calibration procedure.

22. Repeat for other calibration points as required.

23. You can calibrate at one point for each range

16

Conductivity calibration

Manual calibration

1. After placing the conductivity electrode in the standard solution, press the key.

2. Meter displays “Manual cal” as per set calibration method and starts measuring various

calibration values with a blinking on screen.

3. Wait for the to stabilize (stable calibration reading).

4. Use the keys to enter the electrical conductivity value of the standard solution used for calibration.

5. Press the ENT key to confirm and save calibration data.

6. Meter displays DONE indicating end of the conductivity calibration procedure.

7. Repeat for other calibration points as required.

8. You can calibrate at one point for each range.

17

Conductivity calibration

Note

● TDS calibration

TDS (Total dissolved solids) is calculated from the measured conductivity value. So no TDS
calibration is required and once conductivity mode is calibrated, TDS values will be recalibrated
accordingly.
Set the required TDS curve in OAKTON PC200 series Handheld meters. Available TDS curves
are;

- LINR (Linear factor with adjustable factor from 0.4 to 1.0)

- 442 (Myron L 442 non-linear curve)

- EN (European environmental standard non-linear curve)

- NACL (non-linear salinity curve)

To set a desired TDS method, refer “P 2.1 TDS curve selection” on page 37.

18

Conductivity calibration

Note

Tip

● Salinity calibration

Calibration is necessary for accurate salinity measurement. To perform salinity calibration
using OAKTON PC200 series Handheld meters, follow the procedure detailed below:

Prerequisites

• Clean the conductivity electrode with DI (deionized) water and wipe it with tissue paper.

• Switch on the PC meter and plug in the conductivity electrode.

• Prepare standard solution required for calibration.

• Press the key to keep the meter in SAL mode.

• Dip the conductivity electrode in the standard solution till the hole at the upper part of the
electrode is immersed.

• Before salinity calibration, set the required salinity method. In OAKTON PC200 series
Handheld meters, available salinity methods are;

- NACL

- SEA.W (Sea water)

• To set a desired salinity method, refer “P 3.2 select salinity type” on page 41.

• User can adjust the salinity value by calibration.

• For second or multiple point calibration, clean the conductivity electrode with DI water and
follow the same procedure.

• To abort an ongoing calibration process at any point of time, press the key.

19

Conductivity calibration

Calibration

1. After placing the conductivity electrode in the standard solution, press the key.

2. Meter starts measuring various calibration values with a blinking on screen.

3. Wait for the to stabilize (stable calibration reading).

4. Use the keys to adjust the salinity value.

5. Press the ENT key to confirm and save calibration data.

6. Meter displays DONE indicating end of the salinity calibration procedure.

20

Temperature calibration

Note

Tip

● Temperature Calibration

Temperature calibration is required to accurately match pH or conductivity electrode to the
meter. Check the temperature reading and if its acceptable, no temperature calibration is
required. If you need to calibrate, please follow the procedure detailed below:

Prerequisites

• Clean the pH or conductivity electrode with DI (deionized) water and wipe it with tissue
paper.

• Switch on the PC meter and plug in the pH or conductivity electrode and the temperature
sensor.

• Ensure to keep the PC meter in pH or mV measurement mode while using the pH

electrode for temperature calibration and in COND or TDS or Sal measurement mode
while using the conductivity electrode for temperature calibration.

• Dip the electrode in any calibration solution till its temperature sensor is immersed.

• Wait for 5 minutes to ensure temperature stability.

• Meter displays MTC if the temperature sensor is not plugged in and displays AT C if the
temperature sensor is plugged in.

• Temperature calibration must be performed using a known temperature solution or against
a calibrated thermometer.

To abort an ongoing calibration process at any point of time, press the key.

21

Temperature calibration

Calibration

7. After placing the electrode in the solution, press the key.

8. Press the key to switch to temperature calibration mode. Meter displays measured

temperature value.

9. Use the keys to adjust the temperature to the required value.

10. Press the ENT key to save calibration data.

11. Meter displays DONE indicating end of the temperature calibration procedure.

22

Data capture and stor age

Note

■ Data

This section describes the basic method of data storing and transferring using OAKTON 200
series Handheld meters.

● Data capture and storage

In OAKTON PC200 series Handheld meters, data measured by the instrument can be stored in
the internal memory.
To save the measured data:

• Press the ENT key to save the displayed data.

• Meter displays the saved data for 2 seconds and then the display returns to the previous
screen automatically.

• If the data storage limit reaches 500 in PC250 model or 1000 in PC260 model, memory full
error occurs and MEM FULL is displayed. To avoid memory full error, refer “Memory data
full” on page 67.

• In such case, print the data or transfer necessary data to a PC (only for PC260) and delete
the data from the internal memory of the instrument.

Viewing stored data

• To view stored data, press key .

• Use keys to review different stored records.

• Press key to get back to measurement mode.

23

Data capture and storage

Tip

● Data transfer

● Transfer data to PC

Connect the instrument to a PC using phono jack to USB cable to transfer saved data to the
PC (for OAKTON PC260 only). Connect the phono jack at the instrument side to the
communication port on the PC.

● Print data

To print a desired data:

12. Being in the measurement mode, press key.

13. Use keys to view desired stored data.

14. Press key to print that individual data.

● Printer format- measurement

TDS

Meter Model : OAKTON PC260

Serial Number : 123456789

SW Revision : 1.00

Date : 20 Aug 2018

Time : 10:10:28

Mode : TDS

TDS : 1.23 g/L

Temperature : 25.0 C (MAN)

User Name :

Signature :

To print entire stored data log, refer “Print data setup” on page 46.

24

pH set up

Note

Tip

■ Setup

This section describes all the setup functions available in OAKTON PC200 series Handheld
meters.

● P1 pH setup

Using P1 pH setup function of the meter, you can:

• Select buffer standard

• Set calibration alarm

• Erase calibration data

To set the pH functions using OAKTON PC200 series Handheld meters, follow the procedure
detailed below:

Prerequisites

Switch on the PC meter.

• Default buffer setup is BUFF USA. You can change it to BUFF NIST or BUFF DIN if
required.

• Calibration alarm setup option must be used to avoid “Calibration interval alarm error” on
page 67 . You can set the calibration alarm for ---- day to upto 90 days, where ----
indicates “no calibration alarm” has been set.

• Erasing previous calibration data is recommended for accurate calibration. Default setup is
NO but to erase the calibration data, you need to change the setup to YES.

To return to the measurement mode, press the key.

25

pH set up

● P 1.1 Buffer selection

15. Press the key, P1 PH screen appears.

16. Press the ENT

17. Press the ENT

18. Use the keys to change the buffer standard to BUFF NIST or BUFF DIN.

19. Press the ENT
fer selection.

key, P1.1 BUFF screen appears.
key, by default BUFF USA appears.

key, P1.1 BUFF screen appears. This indicates completion of buf-

26

pH set up

● P 1.2 Calibration alarm setup

1. Press the key, P1 PH screen appears.

2. Press the ENT key, P1.1 BUFF screen appears.

3. Press the

4. Press the ENT key, by default DAYS ---- appears.

5. Use the keys to adjust the calibration alarm interval for next calibration.

6. Press the ENT key, P1.2 C.ALr screen appears. This indicates completion of calibration alarm setup.

key, P1.2 C.ALr screen appears.

27

pH set up

● P 1.3 Erase calibration data

1.Press the key, P1 PH screen appears.

2.Press the ENT

3.Press the key, P1.2 C.ALr screen appears.

4.Press the key, P1.3 C.CLr appears.

5.Press the ENT key, C.CLr NO screen appears with NO as default setup.

6.Use the keys to change the setup to YES. This erases the calibration data.

7.Press the ENT
calibration data.

key, P1.1 BUFF screen appears.

key. P1.3 C.CLr screen appears. This indicates erasure of

28

Conductivity set up

Note

Tip

● P1 COND setup

Using P1 COND setup function of the meter, you can:

• Set cell constant

• Select conductivity unit

• Set calibration mode

• Set temperature coefficient

• Set reference temperature

• Erase calibration data

To set the COND functions using OAKTON PC200 series Handheld meters, follow the

procedure detailed below:

Prerequisites

Switch on the PC meter.

• Default cell constant value is 1.00 and you can set a value in between 0.070 to 13.00.

• Default conductivity unit is set as S/cm. You can change the unit to S/m.

• Default auto calibration setup is ON but to perform manual calibration, you need to change
the setup to OFF.

• Default temperature coefficient is 2.00%. You can set a value in between 0.00% to 10.00%.

• Default reference temperature is 25.0 °C. You can set the value in between 15.0 °C to

30.0 °C.

• Erasing previous calibration data is recommended for accurate calibration. Default setup is
NO but to erase the calibration data, you need to change the setup to YES.

To return to the measurement mode, press the key.

29

Conductivity set up

● P 1.1 Cell constant setup

8. Press the key, P1 COND screen appears.

9. Press the ENT

10. Press the ENT

11. Use the keys to set the cell constant in between 0.070 to 13.00.

12. Press the ENT
constant setup.

key, P1.1 CELL screen appears.

key, by default CELL 1.00 appears.

key, P1.1 CELL screen appears. This indicates completion of cell

30

Conductivity set up

● P 1.2 Select conductivity unit

1. Press the key, P1 COND screen appears.

2. Press the ENT

3. Press the

4. Press the ENT key, by default UNIT S/cm appears.

5. Use the keys to change the conductivity unit to S/m.

6. Press the ENT key, P1.2 UNIT screen appears. This indicates completion of conductivity unit selection.

key, P1.1 CELL screen appears.

key, P1.2 UNIT screen appears.

31

Conductivity set up

● P 1.3 calibration mode setup

1. Press the key, P1 COND screen appears.

3. Press the ENT

4. Press the key, P1.2 UNIT screen appears.

5. Press the key, P1.3 A.CAL appears.

6. Press the ENT

7. Use the keys to change the setup to OFF. This enables the manual calibration mode.

8. Press the ENT
auto calibration mode setup.

key, P1.1 CELL screen appears.

key, A.CAL ON screen appears with ON as default setup.

key. P1.3 A.CALscreen appears. This indicates completion of

32

Conductivity set up

● P 1.4 Temperature coefficient setup

1.Press the key, P1 COND screen appears.

2.Press the ENT

3.Press the key, P1.2 UNIT screen appears.

4.Press the key, P1.3 A.CAL appears.

5.Press the key, P1.4 T.CFF appears.

6.Press the ENT

7.Use the keys to set the temperature coefficient in between 0.00% to 10.00%.

8.Press the ENT
temperature coefficient setup.

key, P1.1 CELL screen appears.

key, T.CFF 2.00% screen appears.

key. P1.4 T.CFF screen appears. This indicates completion of

33

Conductivity set up

● P 1.5 Reference temperature setup

1.Press the key, P1 COND screen appears.

2.Press the ENT

3.Press the key, P1.2 UNIT screen appears.

4.Press the key, P1.3 A.CAL appears.

5.Press the key, P1.4 T.CFF appears.

6.Press the key, P1.5 T.rEF appears.

7.Press the ENT

8.Use the keys to set the temperature coefficient in between 15.0 °C to 30.0 °C.

9.Press the ENT
reference temperature setup.

key, P1.1 CELL screen appears.

key, T.REF 25.0 °C screen appears.

key. P1.5 T.rEF screen appears. This indicates completion of

34

Conductivity set up

● P 1.6 Erase calibration data

1.Press the key, P1 COND screen appears.

2.Press the ENT

3.Press the key, P1.2 UNIT screen appears.

4.Press the key, P1.3 A.CAL appears.

5.Press the key, P1.4 T.CFF appears.

6.Press the key, P1.5 T.rEF appears.

7.Press the key, P1.6 C.CLr appears.

8.Press the ENT

9.Use the keys to change the setup to YES. This erases the calibration data.

10.Press the ENT
calibration data.

key, P1.1 CELL screen appears.

key, C.CLr NO screen appears with NO as default setup.

key. P1.6 C.CLr screen appears. This indicates erasure of

35

TDS set up

Note

Tip

● P2 TDS setup

Using P2 TDS setup function of the meter, you can:

• Select TDS curve

• Select TDS unit

• Erase calibration data

To set the TDS functions using OAKTON PC200 series Handheld meters, follow the procedure

detailed below:

Prerequisites

Switch on the PC meter.

• Default TDS curve is linear. You can change the TDS curve to 442 or EN27888 or NaCl.

• For linear curve, default multiplier factor is FACT 0.50. You can set a multiplier factor in
between 0.40 to 1.00.

• Default TDS unit is set as mg/L (g/L). You can change the unit to ppm (ppt).

• Erasing previous calibration data is recommended for accurate calibration. Default setup is
NO but to erase the calibration data, you need to change the setup to YES.

To return to the measurement mode, press the key.

36

TDS set up

If you choose LINR, you can select a factor from 0.40 to 1.00.

● P 2.1 TDS curve selection

11. Press the key, P1 COND screen appears.

12. Press the

13. Press the ENT

14. Press the ENT

key, P2 TDS screen appears

key, P2.1 FACT screen appears.
key, by default FACT LINR appears.

15. Use the keys to select a TDS curve and press the ENT

16. While selecting the linear curve, set a fact in between 0.40 to 1.00.

17. Press the ENT
curve setup.

key, P2.1 FACT screen appears. This indicates completion of TDS

key.

37

TDS set up

● P 2.2 Select TDS unit

1. Press the key, P1 COND screen appears.

2. Press the

3. Press the ENT

4. Press the

5. Press the ENT

6. Use the keys to change the TDS unit to ppm (ppt).

7. Press the ENT key, P2.2 UNIT screen appears. This indicates completion of TDS unit selection.

key, P2 TDS screen appears.

key, P2.1 FACT screen appears.

key, P2.2 UNIT screen appears.

key, UNIT mg/L (g/L) screen appears

38

Salinity set up

Note

Tip

8. P3 SAL setup

Using P3 SAL setups function of the meter, you can:

• Select salinity unit

• Select salinity curve

• Erase calibration data
To set the salinity functions using OAKTON PC200 series Handheld meters, follow the
procedure detailed below:

Prerequisites

Switch on the PC meter.

• Default salinity unit is set as ppt. You can change the unit to percentage (%).

• Default salinity type is set as NaCl. You can change the salinity type to seawater.

• Erasing previous calibration data is recommended for accurate calibration. Default setup is

NO but to erase the calibration data, you need to change the setup to YES.

To return to the measurement mode, press the key.

39

Salinity set up

● P 3.1 select salinity unit

9. Press the key, P1 COND screen appears.

10. Press the

11. Press the

12. Press the ENT

13. Press the ENT

14. Use the keys to change the salinity unit to percentage (%).

15. Press the ENT
ity unit selection.

key, P2 TDS screen appears.
key, P3 SAL screen appears.

key, P3.1 UNIT screen appears.
key, by default UNIT ppt appears.

key, P3.1 UNIT screen appears. This indicates completion of salin-

40

Salinity set up

● P 3.2 select salinity type

1. Press the key, P1 COND screen appears.

2. Press the

3. Press the

4. Press the ENT

5. Press the

6. Press the ENT

7. Use the keys to change the salinity type to seawater.

8. Press the ENT
salinity type selection.

key, P2 TDS screen appears.
key, P3 SAL screen appears.

key, P3.1 UNIT screen appears.

key, P3.2 TYPE screen appears.

key, TYPE NACL appears with NaCl as default setup.

key, P3.2 TYPE screen appears. This indicates completion of

41

Salinity set up

● P 3.3 Erase calibration data

1. Press the key, P1 COND screen appears.

2. Press the

3. Press the

4. Press the ENT

5. Press the

6. Press the

7. Press the ENT

7. Use the keys to change the setup to YES. This erases the calibration data.

8.Press the ENT

calibration data.

key, P2 TDS screen appears.
key, P3 SAL screen appears.

key, P3.1 UNIT screen appears.
key, P3.2 TYPE screen appears.
key, P3.3 C.CLr screen appears.

key, C.CLr NO appears with NO as default setup.

key. P3.3 C.CLR screen appears. This indicates erasure of

42

Data set up

Note

Tip

● Data setup

Using Data setup function of the meter, you can:

• Set data log interval

• Print data log

• Erase data log
To set the data functions using OAKTON PC200 series Handheld meters, follow the procedure
detailed below:

Prerequisites

• Switch on the PC meter.

• Keep the meter either in pH or EC mode

• Data setup procedure is common in both pH and EC mode with different meter screen

display based on available setup sequence.

• Default data log interval is ----, where ---- indicates “no data log interval” has been set.

• Data log interval can be set from 2 to 999 seconds.

To return to the measurement mode, press the key.

43

Data set up

● Data log interval setup

9. Press the key, P1 PH/EC screen appears.

10. Press the key, P2/P4 DATA screen appears.

11. Press the ENT key, P2.1/P4.1 LOG screen appears.

12. Press the ENT key, previously set log interval appears.

13. Use the keys to set the data log interval.

14. Press the ENT key, P2.1/P4.1 LOG screen appears. This indicates completion of data log interval setup.

pH mode

44

EC mode

Data set up

45

Data set up

● Print data setup

1. Press the key, P1 PH/EC screen appears.

2. Press the key, P2/P4 DATA screen appears.

3. Press the ENT key, P2.1 LOG screen appears.

4. Press the key, P2.2/P4.2 PrNT screen appears.

5. Press the ENT key, default setup is NO.

6. Use the keys to change the setup to YES.

7. Press the ENT key, P2.2/P4.2 PrNT screen appears. This indicates completion of the print data.

pH mode

46

EC mode

Data set up

47

Data set up

● Erase data

1. Press the key, P1 PH/EC screen appears.

2. Press key, P2/P4 DATA screen appears.

3. Press the ENT key, P2.1/P4.1 LOG screen appears.

4. Press the key, P2.2/P4.2 PRNT screen appears.

5. Press the key, P2.3/P4.3 D.CLR screen appears.

6. Press the ENT key, default setup is NO.

7. Use the keys set it to YES to erase all the data.

8. Press the ENT key, D.CLR DONE screen appears briefly and then P2.3/P4.3

D.CLR screen appears. This indicates completion of erasure of data.

pH mode

48

EC mode

Data set up

49

General set up

Note

Tip

● General setup

Using P3 General setup function of the meter, you can:

• Select stability mode of the meter

• Set auto shut-off time

• Select temperature measurement

• Reset the meter
To set the general functions using OAKTON PC200 series Handheld meters, follow the
procedure detailed below:

Prerequisites

• Switch on the PC meter.

• Keep the meter either in pH or EC mode

• General setup procedure is common in both pH and EC mode with different meter screen

display based on available setup sequence.

• In the calibration mode, the auto stable (AS) mode is activated. Default stability setup in

measurement mode is “auto stable” (AS). If you like, you can change it to “auto hold” (AH)
or “real time” (RT).

• Default auto shut-off time is 30 minutes. You can set the time from ---- to 30 minutes, where

---- indicates “no auto shut-off time” has been set and meter will be on continuously.

• Default temperature unit is °C and you can change the unit to °F.

• Default reset meter setup is NO. If you like to reset the meter, you can change it to YES.

• Stability judgment criteria remains same for both auto stability mode and auto hold mode.

• To return to the measurement mode,

press the key.

50

General set up

● Auto Stable, Auto Hold and Real Time mode setup

Auto Stable (AS) mode - the meter shows live readings annunciator blinks until the reading

is stable.

Auto Hold (AH) mode - the meter locks the stable reading; annunciator blinks until reading is

stable and then lights up.

Real Time (RT) mode - the meter shows live readings; Both and annunciators are
inactive.

9. Press the key, P1 PH/EC screen appears.

10. Press key, P2 DATA screen appears.

11. Press key, P3/P5 GEN screen appears.

12. Press the ENT key, P3.1/P5.1 STBL screen appears.

13. Press the ENT key, Default the stability mode is AS (auto stable).

14. Use the keys to change the stability mode as AH (auto hold) or RT (real time).

15. Press the ENT key, P3.1/P5.1 STBL screen appears. This indicates completion of the stability mode selection.

pH mode

51

General set up

EC mode

52

General set up

Note

● Auto shut-off time setup

1. Press the key, P1 PH/EC screen appears.

2. Press the key, P2 DATA screen appears.

3. Press the key, P3/P5 GEN screen appears.

4. Press the ENT key, P3.1/P5.1 STBL screen appears.

5. Press the key, P3.2/P5.2 A.OFF screen appears.

6. Press the ENT key, default auto shut-off time is 30 minutes.

7. Use the keys to adjust the auto off time.

8. Press the ENT key, P3.2/P5.2 A.OFF screen appears. This indicates completion of the auto shut-off time setup.

The default shut off time is 30 minutes. This can be adjusted from 1 minute to 30 minutes. If
you set the display to ‘----’ it indicates Auto Off is disabled. Meter will be on indefinitely till the
user switches off the meter.

pH mode

53

General set up

EC mode

54

General set up

● Temperature unit setup

1. Press the key, P1 PH/EC screen appears.

2. Press the key, P2 DATA screen appears.

3. Press the key, P3/P5 GEN screen appears.

4. Press the key, P3.1/P5.1 STBL screen appears.

5. Press the key, P3.2/P5.2 A.OFF screen appears.

6. Press the key, P3.3/P5.3 °C°F screen appears.

7. Press the ENT key, default temperature unit is °C.

8. Use the keys to change the unit to °F.

9. Press the ENT key, P3.3/P5.3 °C°F screen appears. This indicates completion of the end temperature unit selection.

pH mode

55

General set up

EC mode

56

General set up

● Reset meter (factory default)

1. Press the key, P1 PH/EC screen appears.

2. Press the key, P2 DATA screen appears.

3. Press the key, P3/P5 GEN screen appears.

4. Press the ENT key, P3.1/P5.1 STBL screen appears.

5. Press the key, P3.2/P5.2 A.OFF screen appears.

6. Press the key, P3.3/P5.3 °C°F screen appears.

7. Press the key, P3.4/P5.4 r.SET screen appears.

8. Press the ENT key, default meter re-setup is NO.

9. Use the

10. Press the key. Meter displays DONE and automatically switches off.

key to set it YES.

pH mode

57

General set up

EC mode

58

Clock set up

Note

Tip

Tip

● CLK setup

Real-time clock functionality is available only for OAKTON 200 series meters. Using P4 Clock
setup function of the meter, you can set:

• Date

• Time
To set the clock function using OAKTON PC200 series Handheld meters, follow the procedure
detailed below:

Prerequisites

• Switch on the PC meter.

• Keep the meter either in pH or EC mode

• Clock setup procedure is common in both pH and EC mode with different meter screen

display based on available setup sequence.

• Setup date and time is necessary before using the instrument for the first time or after

replacing the batteries.

• Set date and time data is captured correctly while saving data in the internal memory.

To return to the measurement mode, press the key.

59

Clock set up

● Date setup

11. Press the key, P1 PH/EC screen appears.

12. Press the key, P2 DATA screen appears.

13. Press the key, P3 GEN screen appears.

14. Press the key, P4 CLK screen appears.

15. Press the ENT key, P4.1 DATE screen appears.

16. Press the ENT key, default set year appears.

17. Use the

18. Press the ENT key, default set month appears.

19. Use the

20. Press the ENT key, default set day appears.

21. Use the keys to adjust the day.

22. Press the ENT key, P4.1 DATE screen appears. This indicates completion of the

date setup.

keys to adjust the year,

keys to adjust the month.

pH mode

60

EC mode

Clock set up

61

Clock set up

● Time setup

1. Press the key to switch to the setup mode, P1 PH/EC screen appears.

2. Press the key, P2 DATA screen appears.

3. Press the key, P3 GEN screen appears.

4. Press the key, P4 CLK screen appears.

5. Press the ENT key, P4.1 DATE screen appears.

6. Press the key, P4.2 TIME screen appears.

7. Press the ENT key, default set hour appears.

8. Use the keys to adjust the hour.

9. Press ENT key, default set minute appears.

10. Use the keys to adjust the minute.

11. P r ess ENT key, P4.2 TIME screen appears. This indicates completion of the time setup.

pH mode

62

EC mode

Clock set up

63

Maintenance and storage

■ Maintenance and storage

This section describes maintenance of OAKTON PC200 series Handheld meters, pH, ORP
and conductivity electrodes used with the meter.

● Maintenance contract

Please contact your dealer for the product maintenance contract.

● Maintenance and storage of the instrument

● How to clean the instrument

• If the instrument is dirty, wipe it gently with a soft dry cloth. If it is difficult to remove the dirt,
wipe it gently with a cloth moistened with alcohol.

•The instrument is made of solvent resistant materials but is not resistant to all
chemicals. Do not dip the instrument in strong acid or alkali solution, or wipe it with such
solutions.

• Do not wipe the instrument with polishing powder or other abrasive compound.

● Environmental conditions for storage

• Temperature: 0 °C to 45 °C

• Humidity: under 80% relative humidity and free from condensation

● Avoid the following conditions:

• Dusty place

• Strong vibration

• Direct sunlight

• Corrosive gas environment

• Close to an air-conditioner

• Direct wind

64

Maintenance and storage

● Maintenance and storage of electrodes

This section describes an overview of the procedures for maintenance and storage of pH, ORP
and conductivity electrodes.

● How to clean the electrodes

Always clean the electrode with deionized water after every measurement. When the response
is slow or residue from the sample adheres to the electrode, use the appropriate method below
to clean the electrode, and then clean again with deionized water.

For pH electrode

Type of dirt Cleaning solution

General Diluted neutral cleaning solution

Oil Alcohol, or diluted neutral cleaning solution

Inorganic substance 1 mol/L HCl or electrode cleaning solution

Protein Cleaning solution including protein-removing enzyme

Alkali Dip in 1 mol/L HCl or electrode cleaning solution for 1h to 2 h

For ORP electrode

Type of dirt Cleaning solution

General

Oil

Inorganic substance Immerse dilute nitric acid (1:1 nitric acid)

Dilute neutral cleaning solution (General dish washing liquid
works reasonably well.)

For conductivity electrode

Type of dirt Cleaning solution

General Diluted neutral cleaning solution

Inorganic substance Ethanol (keep the ethanol away from plastic parts)

A commercially available scale remover or dilute neutral
Scale that formed during
long term storage

cleaning solution. If this does not remove the scale, use diluted

solution that contains oxygen bleach (sodium percarbonate) or

chlorine bleach (sodium hypochlorite).

65

Maintenance and storage

● Daily storage of the pH and ORP electrodes

If the electrode becomes dry, the response will be slow. Store in a moist atmosphere. Follow
the steps below to properly store the electrodes even when the electrodes will not be used for a
long period.

12. Wash the electrode well with pure water (or deionized water) to remove sample completely, and close the internal solution filler port.

13. Wash the inside of the protective cap with pure water (or deionized water), then add enough pure water (or deionized water) to soak the sponge.

14. Attach the protective cap.

● Daily storage of the conductivity electrode

If the electrode is stored in a dry state, the cell constant will change. Store with the black
electrode part immersed in deionized water, or with the protective cap filled with deionized
water and attached to the electrode.
To store the electrode for a long period, clean it well and attach the protective cap filled with
deionized water.

66

Error mess ages and t rouble shoot ing

■ Error messages and trouble shooting

● Error message

This section describes the causes of typical errors and the actions to be taken to resolve
respective errors.

If ERR is displayed while you are using the instrument, check the error, its cause and action to
be taken in the error list below:

Meter display ERR description Cause of error

and

How to solve the problem

BATT LOW Low battery

OFFS ERR Offset voltage error

SLPE ERR Slope error

Can not auto

BUFF ERR

recognize standard
solution

Battery power is low. Please replace with new
batteries.

Electrode is dirty or reference junction is
clogged. Clean the electrode.

Electrode sensitivity is low. Please clean and
recalibrate with fresh standard solution. If the
problem persists, replace the electrode with
new one.

The instrument cannot identify the standard
solution. Check the calibration solution and
use fresh one if required.

Calibration interval
alarm error

MEM FULL Memory data full

If user selects the
enter key before stable
in calibration mode

Exceeds the calibration interval setup.
Calibrate the meter.

The number of the data saved has exceeded
the specified number of items. Print or
transfer the data. Or, clear stored data.

key is pressed before the calibration

value has stabilized. Wait for the value to be

stable and then press the key.

67

Error messages and trouble shooting

● Trouble shooting

This section describes causes and actions to take for problems that customers frequently ask.

The indicated value fluctuates

< Problem with the electrode >

Cause How to solve problem

The electrode is dirty. Clean the electrode.

The electrode is cracked. Replace the electrode.

The level of reference electrolyte gel. Replace the electrode.

< Problem with the instrument >

Cause How to solve problem

There is a motor or other device
causing electrical interference.

The electrode is not connected
correctly.

< Problem with the sample >

Cause How to solve problem

Electrode is not immersed enough to
cover liquid junction.

The stability of electrode is affected by
the sample solution.

68

Measure at a place where no influence from induction
is given. Ground all AC-powered equipment.

Connect the electrode properly.

The electrode must be immersed up to the liquid

junction.
As a guide, immerse to at least 3 cm from the tip of
the electrode.

It is important to select an electrode that is
appropriate for the sample. Consult your dealer. To
confirm an electrode that is appropriate for the
sample, check the electrode selection guide in our
catalogue, or refer to our website.

Error mess ages and t rouble shoot ing

The response is slow

Cause How to solve problem

The electrode is dirty. Clean the electrode.

The electrode is cracked. Replace the electrode.

It is important to select an electrode that is

The response of electrode is affected
by the sample solution.

The indicated value does not change/No response

appropriate for the sample. Consult your dealer. To
confirm an electrode that is appropriate for the
sample, check the electrode selection guide in our
catalogue, or refer to our website.

Cause How to solve problem

The electrode is cracked. Replace the electrode.

The electrode is not connected
correctly.

Keys are locked.

The instrument is in HOLD state. Cancel the HOLD state.

Instrument defect Consult your dealer.

Connect the electrode correctly.

Turn OFF the power, remove the batteries, and then
turn ON the power again.

69

Error messages and trouble shooting

The measured value is out of the measurement range

When the measured value is below the display range, “Ur” appears. When the measured value
is over the display range, “Or” appears.

Cause How to solve problem

Sample is out of the measurement
range.

Electrode is not immersed enough to
cover liquid junction.

The electrode cable is broken. Replace the electrode.

Calibration is not performed or
performed incorrectly.

Instrument defect Check as explained below.

Use a sample within the measurement range.

The electrode must be immersed up to the liquid

junction.
As a guide, immerse to at least 3 cm from the tip of
the electrode.

Perform calibration correctly.

● How to chec k for instr ument def ect (pH m ode)

Short the metal part of the outer tube to the center pin of the electrode
connector of the corresponding channel of the instrument. If “Ur” or “Or”
appears in this condition, consult your dealer.

Repeatability of the measured value is poor

Cause How to solve problem

Effect of the sample solution

Repeatability becomes poor when the pH of the sample
changes over time.

The electrode is dirty. Clean the electrode.

The electrode is cracked. Replace the electrode.

The internal solution of the
electrode is partially depleted or
contaminated.

Replace the electrode.

70

Error mess ages and t rouble shoot ing

Nothing appears when the power is turned ON

Cause How to solve problem

Power is not supplied. Insert batteries or connect the AC adapter (option).

Battery polarity (+, ) is reversed. Insert the batteries with the polarity (+, ) correctly oriented.

Battery life is low. Replace the batteries.

Instrument defect Consult your dealer.

Swelling of keypad

Cause How to solve problem

Using the instrument at high
elevation or other location where
the air pressure is different from
sea level.

Instrument defect Consult your dealer.

Part of the display is missing

To eliminate the pressure difference between the inside and
outside of the instrument, briefly open and then close the
serial connector and battery cover. After opening, correctly
close the cover to maintain dust and water proofing.

Cause How to solve problem

Instrument defect

Check the display by switching ON the instrument when all
the LCD segments are lit.

71

Technical note

■ Appendix

● Appendix 1

This section describes technical information and option for OAKTON 200 series Handheld
meters.

The pH vs. temperature values for the various standards are listed below:

< USA >

Tem p . (° C ) pH 1.68 pH 4.01 pH 7.00 pH 10.01 pH 12.46

0 1.67 4.01 7.12 10.32

5 1.67 4.01 7.09 10.25 13.25

10 1.67 4.00 7.06 10.18 13.03

15 1.67 4.00 7.04 10.12

20 1.68 4.00 7.02 10.06 12.64

25 1.68 4.01 7.000 10.01 12.46

30 1.69 4.01 6.98 9.97 12.29

35 1.69 4.02 6.98 9.93

40 1.70 4.03 6.97 9.89 11.99

45 1.70 4.04 6.97 9.86

50 1.71 4.06 6.97 9.83 11.73

55 1.72 4.08 6.97 9.81

72

Technical note

< NIST >

Tem p . (° C ) pH 1.68 pH 4.01 pH 6.86 pH 9.18 pH 12.46

0 1.67 4.00 6.98 9.46

5 1.67 4.00 6.95 9.39 13.25

10 1.67 4.00 6.92 9.33 13.03

15 1.67 4.00 6.90 9.27

20 1.68 4.00 6.88 9.22 12.64

25 1.68 4.01 6.86 9.18 12.46

30 1.69 4.01 6.85 9.14 12.29

35 1.69 4.02 6.84 9.10

40 1.70 4.03 6.84 9.04 11.99

45 1.70 4.04 6.83 9.04

50 1.71 4.06 6.83 9.01 11.73

55 1.72 4.08 6.83 8.99

< DIN >

Tem p.
(°C)

0 1.08 3.10 4.67 6.89 9.48 13.37

5 1.09 3.10 4.66 6.87 9.43 13.37

10 1.09 3.10 4.66 6.84 9.37 13.37

15 1.09 3.08 4.65 6.82 9.32 13.17

20 1.09 3.07 4.65 6.80 9.27 12.96

25 1.09 3.06 4.65 6.79 9.23 12.75

30 1.10 3.05 4.65 6.78 9.18 12.61

35 1.10 3.04 4.65 6.77 9.13 12.45

40 1.10 3.04 4.66 6.76 9.09 12.29

45 1.11 3.04 4.67 6.76 9.04 12.14

50 1.11 3.04 4.68 6.76 9.00 11.98

55 1.11 3.04 4.69 6.76 8.96 11.84

pH 1.09 pH 3.06 pH 4.65 pH 6.79 pH 9.23 pH 12.75

73

Technical note

● Conductivity standard values at various temperatures

Tem p.

(°C)

0 64.01 776 7.15 65.4

5 65.00 896 8.22 74.1

10 67.00 1020 9.33 83.2

15 68.00 1147 10.48 92.5

16 70.00 1173 10.72 94.4

17 71.00 1199 10.95 96.3

18 73.00 1225 11.19 98.2

19 74.00 1251 11.43 100.2

20 76.00 1278 11.67 102.1

21 78.00 1305 11.91 104.0

22 79.00 1332 12.15 105.9

23 81.00 1359 12.39 107.9

24 82.00 1386 12.64 109.8

25 84.00 1413 12.88 111.8

26 86.00 1440 13.13 113.8

84.00 (S/cm) 1413 (S/cm) 12.88 (mS/cm) 111.8 (mS/cm )

Conductivity value at 25 °C

27 87.00 1467 13.37 115.7

28 89.00 1494 13.62 117.7

29 90.00 1521 13.87 119.7

30 92.00 1548 14.12 121.8

31 94.00 1575 14.37 123.9

74

● Appendix 2

Printout summary

pH

Meter Model : OAKTON PC260

Serial Number : 123456789

SW Revision : 1.00

Date : 20 Aug 2018

Time : 10:10:28

Mode : pH

pH : 7.00 pH

mV : 0.0 mV

Temperature : 25.0 C (MAN)

Electrode Status : Excellent

User Name :

Signature :

mV

Meter Model : OAKTON PC260

Serial Number : 123456789

SW Revision : 1.00

Date : 20 Aug 2018

Time : 10:10:28

Mode : mV

mV : 0.0 mV

Temperature : 25.0 C (MAN)

User Name :

Signature :

Printer format - Measurement

75

Printout summary

Relative mV

Meter Model : OAKTON PC260

Serial Number : 123456789

SW Revision : 1.00

Date : 20 Aug 2018

Time : 10:10:28

Mode : R. mV

R. mV : 3.0 mV

Offset : -3.0 mV

Temperature : 25.0 C (MAN)

User Name :

Signature :

Conductivity

Meter Model : OAKTON PC260

Serial Number : 123456789

SW Revision : 1.00

Date : 20 Aug 2018

Time : 10:10:28

Mode : Conductivity

Cond : 1413 us/cm

Temperature : 25.0 C (MAN)

Electrode Status : Excellent

User Name :

Signature :

76

Printout summary

Resistivity

Meter Model : OAKTON PC260

Serial Number : 123456789

SW Revision : 1.00

Date : 20 Aug 2018

Time : 10:10:28

Mode : Resistivity

Resistivity : 1000 M-Ohm/cm

Temperature : 25.0 C (MAN)

Electrode Status :

User Name :

Signature :

Salinity

Meter Model : OAKTON PC260

Serial Number : 123456789

SW Revision : 1.00

Date : 20 Aug 2018

Time : 10:10:28

Mode : Salinity

Salinity : 50.0 ppt

Temperature : 25.0 C (MAN)

Electrode Status : Excellent

User Name :

Signature :

77

Printout summary

TDS

Meter Model : OAKTON PC260

Serial Number : 123456789

SW Revision : 1.00

Date : 20 Aug 2018

Time : 10:10:28

Mode : TDS

TDS : 1.23 g/L

Temperature : 25.0 C (MAN)

Electrode Status :

User Name :

Signature :

Printer format - Data log

Meter Model : OAKTON PC260

Serial Number : 123456789

SW Revision : 1.00

User Name :

Signature :

Logged Data

Location : 2

Date : 10 Aug 2018

Time : 10:10:28

Mode : pH

pH : 7.00 pH

mV : 0.0 mV

Temperature : 25.0 C (MAN)

Electrode Status : Excellent

Location : 1

Date : 10 Aug 2018

Time : 10:09:28

Mode : mV

mV : 178.0 mV

Temperature : 25.0 C (MAN)

78

Printout summary

PH

Meter Model : OAKTON PC260

Serial Number : 123456789

SW Revision : 1.00

Date : 20 Aug 2018

Time : 10:10:28

Calibration data

Cal Date : 20 Jun 2018

Cal Time : 10:10:10

Cal Points : 4.01, 7.00, 10.01

Offset : 0.0 mV

Avg Slope : 98.2 %

Cal Temp. : 25.0 C (ATC)

Electrode Status : Excellent

User Name :

Signature :

EC

Meter Model :OAKTON PC260

Serial Number :123456789

SW Revision :1.00

Date :20 Aug 2018

Time :10:10:28

Calibration data

Cal Date :20 Jun 2018

Cal Time :10:10:10

Cal Points :84.0 uS. 1413 uS

Avg Cal Factor :1.022

Cal Temp. :25.0 C (ATC)

Electrode Status :Excellent

User Name :

Signature :

Printer format - Calibration

79

Specifications

● Appendix 3

Model

pH Range -2.00 to 16.00 pH

Resolution 0.01 pH

Accuracy ±0.01 pH

Calibration Points USA & NIST (Up to 5), DIN (Up to 6)

pH Buffer Groups USA, NIST, DIN

ORP Range ±2000 mV

Resolution 0.1 mV (˂ ±1000 mV), 1 mV (≥ ±1000mV)

Accuracy ±0.3 mV (˂ ±1000 mV), 0.3% of reading (≥ ±1000mV)

Calibration Option Yes

Conductivity Range µS/cm to 200.0 mS/cm (k=1.0)

Resolution 0.05% full scale

Accuracy ±0.6% full scale, ±1.5% full scale > 18.0 mS/cm

Reference Temperature 15 to 30 °C (adjustable)

Temperature Coefficient 0.00 to 10.00 %/°C

Cell Constants 0.1, 1.0, 10.0

Calibration Points Up to 4 (Auto) / Up to 5 (Manual)

Units S/cm, S/m (Auto Ranging)

Total Dissolved Solids (TDS) Range ppm to 100 ppt (TDS factor=0.5)

Resolution 0.01 ppm (mg/L) / 0.1 ppt (g/L)

Accuracy ±0.1% full scale

TDS Curves Linear (0.40 to 1.00), EN27888, 442, NaCl

Resistivity Range 0.000 Ω•cm to 20.0 MΩ•cm

Resolution 0.05% full scale

Accuracy

Salinity Range 0.0 to 100.0 ppt / 0.00 to 10.00 %

Resolution 0.1 ppt / 0.01%

Accuracy ±0.2% full scale

Salinity Curves NaCl, Seawater

Calibration Option Yes

Temperature Range -30.0 to 130.0 °C / -22.0 to 266.0 °F

Resolution 0.1 °C / °F

Accuracy ± 0.5 °C / ± 0.9 °F

PC250 PC260

pH/ORP/EC/TDS/Sal/Res/Temp (°C/°F)

±0.6% full scale,

±1.5% full scale > 1.80 MΩ•cm

80

Specifications

Calibration Option Yes

Memory 500 1000

Auto Data Log 

Real-time Clock - 

Date & Time Stamp - 

Auto Hold / Auto Stable / Real Time 

Offset & Average Slope Display 

Calibration Alarm (1 to 90 days) 

Auto Shut-Off (1 to 30 mins.) 

Electrode Status 

Diagnostic Messages 

Software Upgrade

PC Communication

Printer Communication

*1

*1

*2

Meter Inputs BNC, phono

Display Custom LCD with backlight

Housing IP67, shock & scratch resistant, non-slip

Power Requirement 2 × AA batteries

Battery Life > 500 hours

Dimensions 160 (L) × 80 (W) × 40.60 (H) mm

Weight



- 

- 

Approx. 260 g (with batteries) /

216 g (without batteries)

*1 Via PC (USB) cable
*2 Via Printer (RS232) cable

81

Specifications

● Table of conductivity cell range

・Unit: S/m

Range

20.0 to 200.0 S/m

2.00 to 19.99 S/m

0.200 to 1.999 S/m

20.0 to 199.9 mS/m

2.00 (0.00) to 19.99 mS/m

0.200 (0.000) to 1.999 mS/m

0.0 to 199.9 µS/m

・Unit: S/cm

Range

0.200 to 2.000 S/cm

20.0 to 199.9 mS/cm

2.00 to 19.99 mS/cm

200 to 1999 µS/cm

20.0 (0.0) to 199.9 µS/cm

2.00 (0.00) to 19.99 µS/cm

0.000 to 1.999 µS/cm

1000 m

10 cm

-1

-1

Cell constant

-1

100 m

Cell constant

-1

1 cm

10 m

0.1 cm

-1

-1

82

Specifications

● Table of conductivity cell range (resistivity range)

・Unit: Ωꞏm

Cell constant

Range

0.200 to 2.000 MΩꞏm

20.0 to 199.9 kΩꞏm

2.00 to 19.99 kΩꞏm

0.200 to 1.999 kΩꞏm

20.0(0.0) to 199.9 Ωꞏm

2.00(0.00) to 19.99 Ωꞏm

0.000 to 1.999 Ωꞏm

・Unit: Ωꞏcm

Range

20.0 to 200.0 MΩꞏcm

2.00 to 19.99 MΩꞏcm

0.200 to 1.999 MΩꞏcm

20.0 to 199.9 kΩꞏcm

2.00 (0.00) to 19.99 kΩꞏcm

0.200 (0.000) to 1.999 kΩꞏcm

0.0 to 199.9 Ωꞏcm

10 m

0.1 cm

-1

-1

-1

100 m

Cell constant

-1

1 cm

1000 m

10 cm

-1

-1

83

Specifications

84

625 East Bunker Court, Vernon Hills, IL, 60061, USA

Oakton Instruments

Tel: [phone]
Fax: [phone]
[e-mail]
www.4oakton.com

For any questions regarding this product, please contact your local agency,ions.pdf