Oakton pH 300, pH 310 Instruction Manual

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Instruction Manual

pH 300/310

Waterproof Hand-held pH / mV / Temperature Meter

Technolo

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68X248901

rev 5 11/02

Preface

This manual serves to explain the use of the waterproof pH 300/310 hand-held meter. It

functions in two ways, firstly as a step by step guide to help you to operate the meter.

Secondly, it serves as a handy reference guide. It is written to cover as many anticipated

applications of the waterproof pH 300/310 meter as possible. If there are doubts in the use of

the meter, please do not hesitate to contact the nearest Authorized Distributor.

Eutech Instruments/ Oakton Instruments cannot accept any responsibility for damage or

malfunction to the meter caused by improper use of the instrument.

The information presented in this manual is subject to change without notice as improvements

are made, and does not represent a commitment on the part of Eutech Instruments Pte Ltd/

Oakton Instruments.

Copyright © 1999

Eutech Instruments Pte Ltd/ Oakton Instruments

All rights reserved.

Rev 5, 11/02.

TABLE OF CONTENTS

1 INTRODUCTION 1
2 DISPLAY AND KEYPAD FUNCTIONS 2

2.1 Display 2

2.2 Keypad 3

2.3 Inserting the Batteries 4

2.4 Connecting the Electrode and Temperature Probe 5

2.5 Attaching the Electrode Holder to the Meter 7

2.6 Inserting the Electrode into the Electrode Holder 7

3 CALIBRATION 8

3.1 Important Information on Meter Calibration 8

3.2 Preparing the Meter for Calibration 8

3.3 pH Calibration 10

3.4 Relative mV Calibration 12

3.5 Temperature Calibration 13

4 MEASUREMENT 14

4.1 Automatic Temperature Compensation 14

4.2 Manual Temperature Compensation 15

4.3 Taking Measurements 16

5 HOLD FUNCTION 17
6 MEMORY FUNCTION 18

6.1 Memory Input 18

6.2 Memory Recall 19

7 ADVANCED SETUP FUNCTIONS 21

7.1 Advanced SET-UP Mode Overview 23

7.2 P 1.0: Memory Clear (CLr) 25

7.3 P2.0: Viewing previous calibration data 26

7.4 P3.0: Viewing electrode data 27

7.5 P4.0: Unit configuration 29

7.6 P5.0: Resetting to factory default settings 34

7.7 P5.0: Setting the real-time clock 35

7.8 P6.0: Resetting to factory default settings 37

8 PROBE CARE AND MAINTENANCE 38
9 TROUBLE SHOOTING GUIDE 40
10 ERROR MESSAGES 41
11 SPECIFICATIONS 42
12 ACCESSORIES 43
13 ADDENDUM 1: METER FACTORY DEFAULT SETTINGS 46
14 WARRANTY 47
15 RETURN OF ITEMS 48

1 INTRODUCTION

Thank you for selecting this meter. The waterproof pH 300/310 Hand-held meter is a

microprocessor-based instrument that is designed to be handy and user-friendly. It is capable of

measuring pH, mV and temperature. It is designed to be handy and capable of allowing one-hand

operation. It is completely WATERPROOF --- and it FLOATS!

This meter has many user-friendly features – all of which are completely accessible through the

water-resistant membrane keypad. Your meter includes a temperature probe, two electrode holders,

batteries, instruction manual and a warranty card. Complete portable testing versions, including a

rugged carrying case and calibration solutions, are also available. Refer to the Accessories section

for more information.

Please read this manual thoroughly before operating your meter.

1

2 DISPLAY AND KEYPAD FUNCTIONS

2.1 Display

The LCD has a primary and secondary display.

• The primary display shows the measured pH, mV or Relative mV value.

• The secondary display shows the measured temperature.

The display also shows error messages, keypad functions and program functions.

See Figure 1.

Primary Display

1234

5

SETUP MEAS CAL MEM

18

17

16

15

1. SETup mode indicator

2. MEASurement mode

indicator

3. CALibration indicator 9. Automatic Temperature

4. MEMory recall mode

indicator

5. mV or Relative mV indicator 11. ERRor indicator 17. HOLD indicator

6. pH indicator 12. MEMory location indicator 18. READY indicator

READY

HOLD

ON

OFF

-8.8.8.8

MEM

ERR

-1.8.8.8

AM PM

11

Secondary Display

14

13

7. Temperature indicator (°F

8. pH buffer selection indicator 14. Probe indicator

10. Clock indicator (pH 310

10

12

Figure 1: Full LCD Screen

available on pH 310 meter
only)

Compensation indicator

meter only)

R.mV
pH

°C °F
pH
ATC

9

13. Low battery indicator

15. Buffer indicator

16. Function ON/OFF indicator

8

6

7

2

2.2 Keypad

The large membrane keypad makes the instrument easy to use. Each button, when pressed, has a

corresponding graphic indicator on the LCD. See Figure 2. Some buttons have several functions

depending on its mode of operation.

Key Function

ON/OFF

HOLD

MODE

CAL/MEAS

ENTER

▲ &

MI/

▼

MR/

SETUP

Powers on and shuts off the meter. When you switch on the meter, the meter starts up in the
mode that you last switched off from. For example, if you shut the meter off in mV
measurement mode, the meter will be in mV measurement mode when you switch the meter
on.

Freezes the measured reading. To activate, press HOLD while in measurement mode. To
release, press HOLD again.

pH 310 model only:

Selects the measurement parameter. Press MODE to toggle between pH, mV (or relative mV)
and date/time [date/time feature available on pH 310 model only].

Toggles between Calibration and Measurement mode.

1. If you were in pH Measurement mode, press CAL/MEAS to enter pH Calibration mode.
NOTE: Temperature calibration is available from pH Calibration mode. See page 13 for
directions.

2. If you were in mV Measurement mode, press CAL/MEAS to enter mV Calibration mode.

While in SETUP main menu, pressing CAL/MEAS takes you out directly into the measurement
mode.

1. To confirm your calibration values in Calibration mode.

2. To confirm selections in SETUP mode.

In Measurement mode:

Press MI/
memory. Press MR/

In SETUP mode:

Press to scroll through the setup subgroup programs.

In mV calibration mode:

Press to adjust the calibration value.

Takes you into the SETUP mode. This mode lets you customize meter preference and
defaults, and view calibration and electrode offset data.

When auto endpoint feature is switched on, it automatically holds reading

after 5 seconds of stability. The HOLD indicator appears on the display.
Press HOLD to release auto endpoint feature.

▲ (memory input) to store values with its corresponding temperature values in the

▼ (memory recall) to retrieve data from memory.

Figure 2 - Keypad

3

2.3 Inserting the Batteries

Four AAA batteries are included with your meter.

1. Use a Philips screwdriver to remove the two screws holding the battery cover. See Figure 3

below.

2. Remove battery cover to expose batteries.

3. Insert batteries. Follow the diagram inside the cover for correct polarity.

4. Replace the battery cover into its original position using the two screws removed earlier.

Figure 3 - Back panel of meter showing battery compartment

4

2.4 Connecting the Electrode and Temperature Probe

The waterproof pH 300/310 handheld pH meter uses any standard pH, ORP, or ISE electrode with a

BNC connector. For Automatic Temperature Compensation (ATC), this meter requires a

temperature probe with a special 6-pin connector.

Use either:

• All electrode with a BNC connector and a separate temperature probe with 6-pin connector

(EC-PHWPTEM-01W/ 35618-05).

• A “3-in-1” combination pH electrode with temperature probe designed specifically for pH 300

and pH 310 waterproof meters.

Refer to “Accessories” section on page 43 for more information on temperature probe and other

electrodes.

NOTE: Keep connectors dry and clean. Do not touch connector with soiled hands.

To connect the pH, ORP or ISE electrode:

1. Slide the BNC connector of the probe over the BNC connector socket on the meter. Make sure

the slots of the connector are in line with the posts of the socket. Rotate and push the

connector clockwise until it locks.

5. To remove electrode, push and rotate the connector counterclockwise. While holding onto the

metal part of the connector, pull it away from the meter.

CAUTION: Do not pull on the probe cord or the probe wires might disconnect.

To connect the temperature probe:

1. Line up the notch and 6 pins on the probe connector with the holes in the connector located on

the top of the meter. Push down and screw the metal sleeve to lock the probe connector into

place. See Figure 4.

6. To remove probe, unscrew the metal sleeve and slide up the probe connector. While holding

onto metal sleeve, pull probe away from the meter.

CAUTION: Do not pull on the probe cord or the probe wires might disconnect.

5

Figure 4 - Connection for pH Electrode (BNC) and Temperature probe (6-pin connector)

6

2.5 Attaching the Electrode Holder to the Meter

The waterproof pH 300/310 handheld meter comes complete with two

electrode holders. They are designed to facilitate one-hand operation.

Attach two electrode holders if you have a separate electrode and

temperature probe. Care must always be taken to avoid use of excessive

force in the process of attaching these components.

1. Locate the slot on the right-hand side of the meter.

2. Gently slide the flange of the

holder into the slot on the

meter. Make sure the holder is

secured properly into the slot.

See figure 5.

3. You can attach the electrode holder in different

positions. See figure 6.

To attach a second electrode holder:

4. Align the flange of the second electrode holder with

the slot of the first holder.

5. Slide the flange of the second holder into the slot of the

Figure 6 - Electrode can be placed in

different positions with holder

first holder until the tops of the holders are aligned and

secure. See figure 7.

Figure 5 - Holder

slot into right-hand

side of meter

2.6 Inserting the Electrode into the
Electrode Holder

Do not use excessive force when inserting electrodes into the

holders.

Insert the pH electrode into the opening of the first holder until

the top housing of the electrode touches the top of the holder.

If you are using a separate temperature probe, insert the probe into the opening of the second holder

until the ridge on the housing touches the top of the holder.

NOTE: The holder is designed for probes 12 mm in diameter. Electrodes larger than

12 mm may not fit in the holder. Forcing the electrode into the opening may

damage the holder or your electrode.

7

Figure 7 - Two holders

3 CALIBRATION

3.1 Important Information on Meter Calibration

When you re-calibrate your meter, old pH, Rel mV and mV calibration points are replaced on a point

by point basis. For example, if you previously calibrated your meter at pH 4.01, 7.00, and 10.01, and

you have now re-calibrated at pH 7.00, the meter retains the old calibration data at pH 4.01 and pH

10.01. To view current calibration points, see Program P2.0 in the SETUP section on page 26.

To completely re-calibrate your meter, or when you use a replacement probe, it is best to set the

meter to its factory defaults and re-calibrate the meter at all points. To reset the meter to its factory

defaults, see the SETUP section, Program P5.0, page 34 (for pH 300 meter) or Program P6.0, page

37 (for pH 310 meter).

3.2 Preparing the Meter for Calibration

Before starting calibration, make sure you are in the correct measurement mode. When you switch

on the meter, the meter starts up in the units last used. For example, if you shut the meter off in “mV”

units, the meter will read “mV” units when you switch the meter on.

Be sure to remove the protective electrode storage bottle or rubber cap of the electrode

before calibration or measurement. If the electrode has been stored dry, wet the electrode in tap

water for 10 minutes before calibrating or taking readings to saturate the pH electrode surface and

minimize drift.

Wash your electrode in deionized water after use, and store in electrode storage solution. If storage

solution is not available, use pH 4.01 or 7.00 buffer solution.

Do not reuse buffer solutions after calibration. Contaminants in the solution can affect the calibration,

and eventually the accuracy of the measurements. See page 43 for information on our high-quality

pH buffer solutions.

8

pH 300 meter calibration

The pH 300 meter is capable of up to 5-point pH calibration to ensure accuracy across the entire pH

range of the meter. Select from the following buffer options:

• USA buffers --- pH 1.68; 4.01, 7.00, 10.01, and 12.45.

The meter automatically recognizes and calibrates to these standard buffer values, which makes pH

calibration faster and easier.

pH 310 meter calibration

The pH 310 meter features three separate internationally-recognized buffer standards. Select the

buffer standard you require in SETUP mode Program 4.0 (see pages 27 & 34 for more information).

The pH 310 meter is capable of up to 6-point pH calibration, depending on the buffer standard

selection. Select from the following buffer options:

• USA buffers --- pH 1.68, 4.01, 7.00, 10.01, and 12.45.

• NIST buffers --- pH 1.68, 4.01, 6.86, 9.18, and 12.45.

• DIN buffers --- pH 1.09, 3.06, 4.65, 6.79, 9.23, and 12.75.

The meter automatically recognizes and calibrates to these standard buffer values, which makes pH

calibration faster and easier.

9

3.3 pH Calibration

NOTE: We recommend that you perform at least

2-point calibration using standard buffers

that bracket (one above and one below)

the expected sample range. You can

perform a 1-point calibration, but make

sure that the buffer value is close to the

sample value you are measuring.

1. If necessary, press the MODE key to select pH

mode. The pH indicator appears in the upper right

hand corner of the display.

2. Rinse the probe thoroughly with de-ionized water

or a rinse solution. Do not wipe the probe; this

causes a build-up of electrostatic charge on the

glass surface.

3. Dip the probe into the calibration buffer. The end

of the probe must be completely immersed into

the sample. Stir the probe gently to create a

homogeneous sample.

4. Press CAL/MEAS to enter pH calibration mode.

The CAL indicator will be shown. The primary

display will show the measured reading while the

smaller secondary display will indicate the pH

standard buffer solution.

5. Wait for the measured pH value to stabilize.

6. Press ENTER to confirm calibration. The meter is

now calibrated to the current buffer.

See figure 8.

Figure 8 - pH Calibration

10

7. Rinse the probe with de-ionized water or a rinse

solution, and place it in the next pH buffer.

8. Follow steps 5 and 6 for additional calibration

points. See Figure 9.

9. When all the calibration points as set in the Unit

Configuration Setup (see P4.2 on page 31) are

completed, the meter returns to Measurement

mode automatically. However, if you wish to

terminate the calibration without completing the

number of points as set in the Unit Configuration

Setup menu, press CAL/MEAS to return to pH

measurement mode.

NOTES:

To exit from pH calibration mode without confirming

calibration, DO NOT press ENTER in step 6. Press

CAL/MEAS instead.

If the selected buffer value is not within ±1.0 pH from the

measured pH value: the electrode and buffer icon blink

and the ERR annunciator appears in the lower left corner

of the display. Figure 10.

To limit the number of pH buffer values available during

calibration, see SETUP section P4.2 on page 31.

Figure 9 - Next point calibration for pH

4.01

Figure 10 - Err message and electrode
icon will appear if incorrect buffer are

11

used

3.4 Relative mV Calibration

1. While in the measurement function, press MODE to

enter the mV mode. The mV indicator appears in the

upper right hand corner. See figure at right.

2. Press the CAL/MEAS key. The CAL indicator

appears above the primary display. The primary

display shows the relative mV reading and the

secondary display shows the absolute mV value.

NOTE: If you have never calibrated relative mV or if

the meter has been reset, the value shown

in the primary display is the same as the

absolute mV value.

NOTE: “R.” annunciator will appear once mV

calibration is performed, an indication of

mV offset.

3. Press the MI/▲ or MR/▼keys to enter the relative

mV value that matches your desired reading.

4. Press the ENTER key to confirm the reading and to

return to the measurement mode. The primary

display now shows the relative mV reading.

NOTES:

To view the mV offset value, use the SETUP mode

Program P3.1. See page 27 for instructions.

To reset all calibration and offset values in memory to the

factory default settings, use:

• In pH 300 meter: SETUP Program P 5.0. See page

34.

• In pH 310 meter: SETUP Program P 6.0. See page

37.

Figure 11 - mV calibration

12

3.5 Temperature Calibration

The temperature sensor is factory calibrated. Calibrate the

temperature probe only if you suspect temperature errors that

may have occurred over a long period of time or if you have a

replacement probe.

Temperature Calibration

1. Make sure the ATC probe (or temperature connector of the

electrode) is attached to the 6-pin connector. The ATC

annunciator will appear at the right-hand side of the LCD.

2. Switch the meter on. Press the MODE key to select pH

mode.

3. Press the CAL/MEAS key to enter pH calibration mode.

The CAL indicator will appear above the primary display.

4. While in pH calibration mode, press the MODE key to enter

temperature calibration mode. The primary display shows

the temperature reading with last set offset and the

secondary display shows the factory default temperature

value.

5. Dip the ATC probe (or electrode) into a solution of known

temperature (i.e. a temperature bath). Allow time for the

temperature probe to stabilize.

6. Scroll with the MI/▲ or MR/▼ keys to set the correct

temperature value (i.e. the temperature of the temperature
bath). You can adjust the reading in increments of 0.1 °C.

7. Once you have selected the correct temperature, press the

ENTER key. The meter automatically returns to pH

measurement mode. See Figure 12.

NOTES:

• You can offset the temperature reading up to ±5°C from

original reading.

• To exit this program without confirming the temperature

calibration value, DO NOT press ENTER. Press

CAL/MEAS instead.

13

Figure 12 - Temperature

calibration

4 MEASUREMENT

This meter is capable of taking measurements with automatic or manual temperature compensation.

Automatic temperature compensation only occurs when a temperature sensor is plugged into the

meter. If there is no temperature sensor plugged into the meter, the default manual temperature
setting is automatically 25 °C. You can manually set the temperature to match your working

conditions using a separate thermometer.

4.1 Automatic Temperature Compensation

For automatic temperature compensation (ATC) simply plug

the temperature probe into the meter (see page 6 for

directions). The ATC indicator will light up on the LCD. See

figure 13.

NOTE: If you are using a temperature probe, the

probe must be submersed in the liquid you

are measuring.

Figure 13 - ATC annunciator will light

up when connected to temperature

probe

14

4.2 Manual Temperature
Compensation

IMPORTANT: For manual compensation, you must

disconnect the temperature probe (see page 6).

1. Switch the meter on. Press the MODE key to select

pH mode.

2. Press the CAL/MEAS key to enter pH calibration

mode. The CAL indicator will appear above the

primary display.

3. While in pH calibration mode, press the MODE key

to enter temperature calibration mode. The primary

display shows the current temperature setting and

the secondary display shows the default value 25
°C.

4. Check the temperature of your sample using an

accurate thermometer.

5. Press the MI/▲ or MR/▼ keys to set the

temperature to the measured value from step 4.

6. Press ENTER to confirm the selected temperature

and to return to the pH measurement mode.

See Figure 14.

The meter will now compensate pH readings for the

manually set temperature.

NOTES:

To exit this program without confirming the manual

temperature compensation value, DO NOT press ENTER

in step 6. Press CAL/MEAS instead.

Figure 14 - Manual temperature

compensation

15

4.3 Taking Measurements

Be sure to remove the electrode soaker bottle or

protective rubber cap on the electrode before

measurement.

To take readings:

1. Rinse the probe with de-ionized or distilled water

before use to remove any impurities adhering to the

probe body. If the pH electrode has dehydrated,

soak it for 30 minutes in electrode storage solution

or 2M – 4M KCl solution (sold separately).

2. Press ON to switch on meter. The MEAS

annunciator appears on the top center of the LCD. The ATC indicator appears in the lower

right-hand corner to indicator Automatic Temperature Compensation (see page 15 to set

Manual Temperature Compensation). See Figure 15.

3. Dip the probe into the sample.

When dipping the probe into the sample, the sensor or the glass bulb of the electrode must be

completely immersed into the sample. Stir the probe gently in the sample to create a homogeneous

sample.

4. Allow time for the reading to stabilize. Note the reading on the display.

5. To toggle between pH and mV (or Rel mV) readings, press the MODE key.

Taking measurements with READY indicator selected on

If the READY indicator has been activated, the READY annunciator lights when the reading is stable

*. Switch the READY indicator on or off in SETUP program P 4.1. See page 30 for directions.

* The READY indicator appears and the reading holds until the measured value exceeds the tolerance (±0.02 pH; ±

±

0.8 mV <400;

1.2 mV > 400). Then, the READY annunciator turns off.

Taking measurements with the auto endpoint feature selected on

NOTE: This feature is available on model pH 310 only.

When a reading is stable for more than 5 seconds, the auto endpoint feature will automatically “hold”

the reading. The “hold” indicator appears on the left side of the display. Press the HOLD key to

release the reading. Switch the Auto endpoint feature on or off in SETUP program P 4.1, see page

30 for instructions.

Figure 15 - Measurement mode

16

5 HOLD FUNCTION

This feature lets you freeze the value of the pH, mV (or

Relative mV) and temperature readings for a delayed

observation. HOLD can be used any time when in MEAS

mode.

1. To hold a measurement, press the HOLD key while in

measurement mode. “HOLD” will appear on the

display. See Figure 16.

2. To release the held value, press HOLD again.

Continue to take measurements.

NOTE: This meter shuts off automatically 30 minutes after last key is pressed. If the meter is shut

off either automatically or manually, the HOLD value will be lost. For longer storage, use

the Memory functions described in page 18.

NOTE: for pH 310 model only: The pH 310 meter has an auto endpoint feature. When this feature

is switched on, the display will automatically “HOLD” a reading that has been stable for

more than 5 seconds. The “HOLD” indicator appears. Press the HOLD key to release the

reading. To switch on or off the auto endpoint feature, see SETUP Program P 4.1 on page

30.

Figure 16 - HOLD feature

17

6 MEMORY FUNCTION

6.1 Memory Input

Your meter stores data in sets:

• pH and temperature

• mV (or relative mV) and temperature

For pH 300 meter: The pH 300 meter can store up to 16

sets of data in any combination of

values. For example, you can store

7 pH and 9 mV values.

For pH 310 meter: The pH 310 meter can store up to 50

sets of data in any combination of

values. In addition to the standard

data set, the pH 310 meter also

stores the date and time the reading

was stored.

To store a reading:

1. During any measurement function (MEAS), press MI

key to input any data into the memory.

2. MEM, “Sto” and memory number will flash. The

meter then returns to measurement mode.

See figure 17.

NOTE: If the memory is full, the first value stored

will be erased to create space for the new

value.

18

Figure 17 - Memory Input

6.2 Memory Recall

This function recalls the previous readings stored in the

memory. You can only access MR from the measurement

mode. Memory recall is in “Last In First Out” order.

To recall readings:

1. Press the MR key once to retrieve the last reading

stored. The memory location screen – MEM, “Loc”

and the memory number – will flash on the display.

2. Press the ENTER key to recall the reading stored

under that memory number.

For pH 300 meter only: Press the ENTER key again

to return to the “memory location” screen. See Figure

18.

For pH 310 meter only: Press the ENTER key again

to view the date (Month/Day format) and time

(Hour/Minute format) the reading was taken. See

Figure 19.

Press ENTER key again to return to the “memory

location” screen.

3. The display automatically moves to the next lower

memory location screen.

See figure 20.

Figure 18 - Memory recall function

19

4. If necessary, press the MI/▲ key to select the next

“memory location” screen; press the MR/▼ key to

select the previous “memory location” screen.

5. Repeat steps 2 to 5 to review additional stored data

sets.

6. To exit Memory Recall, press the MEAS key to

return to the Measurement mode.

NOTES:

Readings stored in memory are retained even if the units are

turned off. To erase all readings stored in memory, use the

SETUP mode P1.0 on page 25.

Figure 19 - View date and time

(available only for pH 310 meter)

Figure 20 - Next Memory Recall value

20

7 ADVANCED SETUP FUNCTIONS

The advanced setup mode lets you customized your meter’s preferences and defaults. This meter

features different sub groups that organize all setup parameters.

The sub-groups are:

1. P1.0: Memory clear (CLr)

2. P2.0: Viewing calibration data (CAL)

3. P3.0: Viewing electrode data (ELE)

4. P4.0: Unit configuration (COF)

5. P5.0 (pH 300 only): Reset to factory default settings (rSt)

P5.0 (pH 310 only): Setting clock (CLO)

6. P6.0 (pH 310 only): Reset to factory default settings (rSt)

See Figure 21 and 22.

21

Figure 21 - pH 300 Advanced Setup

Subgroups

22

Figure 22 - pH 310 Advanced Setup

Subgroups

7.1 Advanced SET-UP Mode Overview

Press the SETUP key to enter Set up mode.

Press the MI/▲ or MR/▼ keys to scroll through sub groups.

pH 300 meter set up mode

P1.0: Memory clear

P1.0 Clear all stored readings

P2.0: Viewing previous calibration data

P2.1 View first calibration point (pH 1.68)

P2.2 View second calibration point (pH 4.01)

P2.3 View third calibration point (pH 7.00)

P2.4 View fourth calibration point (pH 10.01)

P2.5 View fifth calibration point (pH 12.45)

P3.0: Viewing electrode data

In pH measurement mode:

P3.1 pH electrode offset

P3.2 pH electrode slope

In mV (or relative mV) measurement mode:

P3.1 Relative mV offset

P4.0: Unit configuration

P4.1 READY indicator on or off

P4.2 Number of calibration points: 2, 3, 4 or 5

P5.0: Reset to factory default

P5.0 Reset to factory default settings

23

pH 310 meter setup mode

P1.0: Memory clear

P1.0 Clear all stored readings

P2.0: Viewing previous calibration data (USA, NIST

or DIN standards)

P2.1 First calibration point (plus time and date)

P2.2 Second calibration point (plus time and date)

P2.3 Third calibration point (plus time and date)

P2.4 Fourth calibration point (plus time and date)

P2.5 Fifth calibration point (plus time and date)

P2.6 Sixth calibration point (plus time and date)
(only for DIN buffer set)

P3.0: Viewing electrode data

In pH measurement mode:

P3.1 pH electrode offset

P3.2 pH electrode slope

In mV (or relative mV) measurement mode:

P3.1 Relative mV offset

P4.0: Unit configuration

P4.1 READY indicator on or off

P4.2 Number of calibration points: 2, 3, 4 or 5 (or

6 for DIN buffer set only)

P4.3 Calibration buffer selection sets

P4.4 Selecting °C or °F

P5.0: Setting Clock

• Setting year

• Setting date (month/day)

• Setting time (hour/minute/second)

P6.0: Reset to factory default

P6.0 Reset to factory default settings

24

7.2 P 1.0: Memory Clear (CLr)

Use this parameter to clear all memory values when you need

to store a new series of values. This lets you avoid confusing

the old values with the new ones.

NO is the default setting.

NOTE: Selecting YES will wipe out all memory.

From measurement mode:

1. Press the SETUP key to enter Set Up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through

subgroups until you view the parameter P1.0.

3. Press the ENTER key to enter parameter P1.0.

4. Press the MI/▲ or MR/▼ keys to toggle between NO and

YES.

z NO retains current memory

z YES clears all memory.

See Figure 23.

5. Press the ENTER key to confirm selection and return to

the subgroup menu. Press CAL/MEAS key to return to

measurement mode.

25

Figure 23 - P1.0: Memory Clear

7.3 P2.0: Viewing previous calibration data

This mode lets you recall previous calibration data, which

helps you know when to re-calibrate your meter. This is a

“view only” mode.

From measurement mode:

1. Press the SETUP key to enter Set up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through

subgroups until you view parameter P2.0.

3. pH 300 meter only: Press the ENTER key repeatedly

to view previous calibration data. See Figure 24.

pH 310 meter only: Press the ENTER key repeatedly

to view previous calibration data. The meter will first

display the calibration point, and then display the date

and time of calibration. See Figure 25.

4. When you have scrolled through all calibration data,

you will automatically return to the subgroup menu.

Press CAL/MEAS key to return to measurement mode.

Figure 25 - Time/date appears on pH

310 meter display only

NOTES:

If there is no previous calibration data at a particular point, the primary display will show “ ----“.

Figure 24 - P2.0: View calibration

data

26

7.4 P3.0: Viewing electrode data

Program 3 has two “view only” options that let you check the

electrode parameters for diagnostic purposes.

From pH measurement mode, you can view the electrode’s

offset and slope values.

From mV measurement mode, you can view the electrode’s

relative mV offset value.

P3.1 & P3.2 : Electrode offset and slope

From pH measurement mode

1. Press the SETUP key to enter Set Up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through

subgroups until you view parameter P3.0.

3. Press the ENTER key to select parameter 3.1.

4. The display shows the electrode offset value. It is the

mV offset at pH 7.00. If you have not calibrated at any

buffer, the primary display shows 0.0 mV.

5. Press the ENTER key to proceed to electrode slope

display.

6. The display shows electrode slope in percentage.

Slope displayed is the average slope based on the pH

calibrations. Default setting is 100.0.

7. At any point, you can press the CAL/MEAS key to

return to measurement mode.

See figure 26.

Figure 26 - Viewing electrode's offset

and slope status from pH

measurement mode

27

From mV measurement mode

If you are in mV measurement mode, the display shows

the relative mV offset. You can adjust the relative mV

offset in relative mV calibration mode. See page 12 for

instructions.

1. If necessary, press the MODE key to select mV

measurement mode.

2. From mV measurement mode, press the SETUP key

to enter Set Up mode.

3. Press the MI/▲ or MR/▼ keys to scroll through

subgroups until you view parameter P3.0.

4. Press the ENTER key to select parameter 3.1.

5. The display shows the electrode offset value. It is

the relative mV offset. If you have not calibrated at

any mV standards, the primary display shows 0.00

mV.

Figure 27 - View electrode offset value

from mV measurement mode

6. Press the ENTER key to return to P3.0.

7. At any point, you can press the CAL/MEAS key to return to measurement mode.

See figure 27.

28

7.5 P4.0: Unit configuration

This subgroup program allows you to customize the meter to

your specific needs. You can program the meter to:

1. Select READY function ON or OFF (pH 310 allows you an

additional feature of switching the Auto endpoint function

on or off)

2. Select the number of pH calibration points

3. Select between three standard calibration buffer sets (for

pH 310 meter only)

4. Select between °C and °F units for temperature readings

(for pH 310 meter only)

Figure 28 on the right shows the setup sequence for this

program subgroup.

NOTE: Programs P4.3 and P4.4 is only available in pH 310

meter.

Figure 28 - P4.0: Unit

configuration program (P4.3

and P4.4 available on pH 310

meter only)

29

P4.1: READY Indicator and auto endpoint function

Program P4.1 lets you select “READY indicator on” to

indicate when the reading is stable*, or select “READY

indicator off” for faster meter response.

pH 310 meter only: Program P4.1 also lets you switch the

Auto endpoint function on or off. Select auto endpoint on to

“hold” the reading when it is stable for more than 5 seconds.

The display automatically freezes, and the HOLD indicator

appears on the left side of the display. Press the HOLD key

to release the display and access other functions. Select

auto endpoint off to deactivate this feature.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through

subgroups until you view parameter P4.0.

3. Press the ENTER key to select parameter 4.1.

4. Press the MI/▲ or MR/▼ keys to select the

configuration you require.

• OFF switches the READY indicatory off.

• ON switches the READY indicator on.

• pH 310 meter only: ON and HOLD together switches

Figure 29 - P4.1: Selecting READY

function)

the auto endpoint feature on.

5. Press the ENTER key to confirm selection and to

proceed to step 4 of P4.2. Press the CAL/MEAS key to

return to measurement mode.

NOTES:

Meter default is set for READY indicator on and auto endpoint function off.

*The READY indicator appears and the reading holds until the measured value exceeds the tolerance (± 0.02 pH; ±

±

0.8 mV <400 mV;

1.2 mV > 400). Then the READY annunciator turns off.

30

P4.2: Selecting number of pH calibration points

Program P4.2 lets you select the number of calibration

points that appear in pH calibration mode: 2, 3, 4, or 5.

This lets the meter scroll through the calibration points

more quickly if you regularly calibrate at less than 5

points.

From measurement mode.

1. Press SETUP key to enter Set Up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through

subgroups until you view parameter P4.0.

3. Press the ENTER key twice to select parameter

4.2.

4. Press the MI/▲ or MR/▼ keys to select 2, 3, 4, or

5 point pH calibration (up to 6 points for DIN

calibration set with pH 310 meter).

5. Press the ENTER key to confirm selection and to

return to the subgroup menu. Press CAL/MEAS

key to return to measurement mode.

See Figure 30.

Figure 30 - P4.2: Select number of pH

calibration points

31

P4.3 Calibration buffer selection sets

Available in pH 310 meter only

The pH 310 meter lets you select between three standard

calibration buffer sets, depending on your requirements.

The available sets are USA, NIST, and DIN standard

calibration buffers.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through

subgroups until you view parameter P4.0.

3. Press the ENTER key three times to select

parameter 4.3.

4. Press the MI/▲ or MR/▼ keys to select the buffer

set you require:

• USA buffers – pH 1.68, 4.01, 7.00, 10.01, and

12.45.

• NIST buffers – pH 1.68, 4.01, 6.86, 9.18, and

12.45.

• DIN buffers – pH 1.09, 3.06, 4.65, 6.79, 9.23

and 12.75.

5. Press the ENTER key to confirm selection and to

return to the subgroup menu. Press CAL/MEAS key

to return to measurement mode.

See Figure 31.

Figure 31 - P4.3: Select calibration

buffer sets (pH 310 meter only)

32

P4.4 Selecting °C or °F

Available in pH 310 meter only

The pH 310 meter lets you select between °C and °F units

for temperature readings.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through

subgroups until you view parameter P4.0.

3. Press the ENTER key four times to select parameter

4.4.

4. Press the MI/▲ or MR/▼ keys to toggle between °C

and °F.

5. Press the ENTER key to confirm selection and to

return to the subgroup menu. Press the CAL/MEAS

key to return to measurement mode.

See Figure 32.

Figure 32 - P4.4: Select temperature

units (pH 310 meter only)

33

7.6 P5.0: Resetting to factory default settings

Available in pH 300 meter only

In the pH 300 meter, Program 5 lets you reset all

parameters to factory default settings. This clears all

calibration data, memory, and any other setup functions you

might have changed.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through

subgroups until you view parameter P5.0.

3. Press the ENTER key to enter parameter P5.0. See

Figure 33.

4. Press the MI/▲ or MR/▼ keys to toggle between NO

and YES.

• NO retains current settings

• YES resets to factory default settings.

5. Press the ENTER key to confirm selection and to

return to the measurement mode. Otherwise press

CAL/MEAS key to return to measurement mode

without resetting to factory default.

Figure 33 - P5.0: Reset to factory

default values (pH 300 meter only)

34

7.7 P5.0: Setting the real-time clock

Available in pH 310 meter only

The pH 310 meter features a real-time calendar and clock.

This helps you to meet GLP (Good Laboratory Practice)

standards.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through

subgroups until you view parameter P5.0.

3. Press the ENTER key to enter parameter P5.0. The

meter lets you select the century: “19—“ or “20—“. The

century digits will flash.

4. Press the MI/▲ or MR/▼ keys to toggle to the correct

century.

5. Press ENTER key to confirm the century and move to

“year” selection. The “year” digits will flash.

6. Press the MI/▲ or MR/▼keys to toggle to the correct

year. See Figure 34.

7. Press ENTER key to confirm the year and move to

“month” selection. The “month” digits will flash.

8. Press the MI/▲ or MR/▼ keys to toggle to the correct

month.

9. Press the ENTER key to confirm the month and move

to “date” selection. The “date” digits will flash. See

Figure 35 (next page).

10. Press the MI/▲ or MR/▼ keys to toggle to the correct

date.

11. Press the ENTER key to confirm the date and move to

“hour” selection. The “hour” digits will flash. See Figure

36 (next page).

Figure 34 - P5.0: Setting century and

year (pH 310 meter only)

35

12. Press the MI/▲ or MR/▼ keys to toggle to the

correct hour. Note the “AM” and “PM” indicator on

the lower portion of the display.

13. Press the ENTER key to confirm the hour and

move to “minute” selection. The “minute” digits will

flash.

14. Press the MI/▲ or MR/▼ keys to toggle to the

correct minutes.

15. Press the ENTER key to confirm the minutes and

move to “second” digits will flash. See Figure 35.

16. Press the MI/▲ or MR/▼ keys to toggle to the

correct seconds.

17. Press the ENTER key to confirm the

18. Press the CAL/MEAS key to return to the

NOTES

Press the CAL/MEAS key at any point while

setting the time to return to the subgroup menu.

Figure 35 - P5.0: Setting month and

date (pH 310 meter only)

seconds and return to “century” selection.

subgroup menu. Press the CAL/MEAS key

again to return to measurement mode.

Figure 36 - P5.0: Select time (pH 310

meter only)

36

7.8 P6.0: Resetting to factory default settings

Available in pH 310 meter only

In the pH 310 meter, Program 6 lets you reset all parameters

to factory default settings. This clears all calibration data,

memory, and any other setup functions you might have

changed.

From measurement mode

1. Press SETUP key to enter Set Up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through

subgroups until you view parameter P6.0.

3. Press the ENTER key to enter parameter P6.0.

4. Press the MI/▲ or MR/▼ keys to toggle between NO

and YES.

• ‘NO’ retains current settings

• ‘YES’ resets to factory default settings.

5. Press the ENTER key to confirm selection and to

return to the measurement mode. Otherwise press

CAL/MEAS key to return to measurement mode

without resetting to factory default.

See Figure 37.

Figure 37 - P6.0: Reset to factory

default values (pH 310 meter only)

37

8 PROBE CARE AND MAINTENANCE

Since your pH electrode is susceptible to dirt and contamination, clean it every one to three months

depending on the extent and condition of use.

NOTE: For specialty electrode care, consult the instruction manual included with your electrode.

pH electrode storage

For best results, always keep the pH bulb wet. Use the protective electrode storage bottle or rubber

cap filled with electrode storage solution to store your electrode. Also, you can store in a pH 4 buffer

with 1/100 part of saturated KCl. Other pH buffers are OK for storage, but NEVER use distilled water

for storage.

After measuring

1. Rinse the pH electrode and reference junction in de-ionized water.

2. Store the electrode as recommended above in “pH electrode storage,” or as recommended by

the manufacturer.

3. Prior to next use, rinse the liquid junction with de-ionized water and tap dry – never wipe

electrode.

NOTE: If this does not restore electrode to normal response, see “Reactivating the pH electrode”

section below.

pH electrode cleaning

• Salt deposits: Dissolve the deposits by immersing the electrode in tap water for ten

to fifteen minutes. Then thoroughly rinse with distilled water.

• Oil/Grease film: wash electrode pH bulb gently in some detergent and water. Rinse

electrode tip with distilled water or use a general purpose electrode cleaner (see the

Accessories section for ordering information).

• Clogged reference junction: Heat a diluted KCl solution to 60 to 80 °C. Place the

sensing part of the electrode into the heated solution for about 10 minutes. Allow the

electrode to cool in some unheated KCl solution.

• Protein deposits: Prepare a 1% pepsin solution in 0.1 M of HCl. Set the electrode

in the solution for five to ten minutes. Rinse the electrode with distilled water.

38

Reactivating the pH electrode

If stored and cleaned properly, your pH electrode should be ready for immediate use. However, a

dehydrated bulb may cause sluggish response. To rehydrate the bulb, immerse the electrode in a pH

4 buffer solution for 10 to 30 minutes. If this fails, the electrode requires activation. Never touch or

rub glass bulb. Contact builds up an electrostatic charge.

pH electrode activation (for glass body electrodes only)

WARNING: Only qualified persons proficient with the safe handling of dangerous chemicals should

perform the procedure below. Provide proper containers, fume hoods, ventilation, and waste

disposal. Safety goggles and protective clothing must be worn while performing this procedure. If

possible, replace with another electrode instead of performing this re-activation procedure.

1. Dip or stir the pH electrode in alcohol for 5 minutes.

2. Leave the electrode in tap water for 15 minutes.

3. Dip and stir the electrode in concentrate acid (such as HCL or H2SO4) for five minutes.

4. Repeat Step 2.

5. Dip and stir in strong base (NaOH) for five minutes.

6. Leave for 15 minutes in tap water.

7. Now test with standard calibration buffer solutions to see if the electrode yields acceptable

results. You may repeat step 3 through 6 up to three times for better response. If the response

does not improve, then your electrode is no longer functioning. Replace with a new electrode –

call your distributor for information.

39

9 TROUBLE SHOOTING GUIDE

Problem Cause Solution

Power on but no
display

Unstable readings a). Air bubbles in probe.

Slow response a). Dirty / Oily probe. a). Clean probe. See “Probe Care &

a). Batteries not in place

b). Batteries not in correct polarity (+

and – position).

c). Weak batteries

b). Dirty probe.

c). Probe not deep enough in sample.

d). External noise pickup or induction

caused by nearby electric motor.

e). Broken probe.

a). Check that batteries are in place and

making good contact.

b). Re-insert batteries with correct

polarity.

c). Replace batteries or attach optional

AC adapter.

a). Tap probe to remove bubbles.

b). Clean the probe and re-calibrate.

c). Make sure sample entirely covers the

probe sensors.

d). Move or switch off interfering motor.

e). Replace probe. See the

Accessories section, page 43.

Maintenance”, page 38- 39.

40

10 ERROR MESSAGES

LCD Display Indicates Cause Solution

Err annunciator Unrecognized input from

CAL & Err
annunciators on /
Buffer and
electrode
indicators blink.

Battery indicator
blinks

Err 1 (in primary
display)

Err. 2 (in primary
display)

Err. 3 (in primary
display)

Err. 4 (in primary
display)

keypad

Calibration error. Wrong value input at

Low battery level. Need new batteries or

Memory write error. Instrument too old (> 10

Memory checksum error. Hardware failure. Turn meter on and off again.

A/D converter error. Hardware error. Turn meter on and off again.

Keypad error. One or more keys on the

Wrong input in selected
mode.

calibration.

Dirty probe.

battery connection is bad.

years). Hardware failure.

keypad are stuck.

Release key. Select valid
operations depending on
mode.

Check your input value, clean
probe.

See Calibration sections or
Probe Maintenance section.

Clean battery contacts.
Replace batteries with fresh
ones, noting polarity.

Turn meter on and off again.
If message persists, return
unit*.

If message persists, return
unit*.

If message persists, return
unit*.

Turn meter on and off again.
If message persists, return
unit*.

* See “Warranty” and “Return of Items” on pages 47 and 48.

If an error message appears in the primary display (the

upper row of larger digits), switching off the meter and

switching it on again may eliminate the error message. Refer

to diagram on right.

If error persists, or the meter shows incorrect values, return

the meter.

For a complete diagram of the display see page 2.

41

11 SPECIFICATIONS

SPECIFICATIONS DESCRIPTIONS pH 300 pH 310

pH Range -2.00 to 16.00 pH Yes Yes

Resolution / Accuracy

Slope Range 80 to 110% Yes Yes

Temperature Range

Resolution / Accuracy

Millivolt Range (Extended) -199.9 to +199.9 mV Yes Yes

Resolution / Accuracy

Millivolt Range -1999 to +1999 mV Yes Yes

Resolution / Accuracy

Temperature Compensation

Number of calibration points

Number of calibration buffers USA: 1.68, 4.01, 7.00, 10.01, & 12.45 Yes Yes

NIST: 1.68, 4.01, 6.86, 9.18, & 12.45 No Yes

pH Slope Display 80 to 110% Yes Yes

Relative mV & Offset Display Offset up to +/-150 mV Yes Yes

Hold Function Yes Yes

Auto-hold No Yes

Memory pH or mV plus temperature 16 50

Date and Time Stamping No Yes

Auto Power off 20 minutes after last key operation Yes Yes

Averaging/Stability (READY) Selectable Yes Yes

Inputs BNC & 6-pin military type Yes Yes

Display Custom Dual LCD Yes Yes

Power Requirements 4 ‘AAA’ Batteries Yes Yes

Battery Life > 100 hours Yes Yes

Dimension / Weight Meter: 19 x 10 x 6 cm; 320 g

0.01 pH / ± 0.01 pH

-10 to 110 °C

(14 to 230 °F)

0.1 °C / ± 0.5 °C (0.1 °F / 0.5 °F)

0.1 mV / ± 0.2 mV

1 mV / ± 2 mV

Auto / Manual (from 0 to 100 °C)

(up to 6 for pH 310 using DIN)

DIN: 1.09, 3.06, 4.65, 6.79, 9.23, &

Boxed: 24 x 23 x 7 cm; 700 g

1 to 5

12.75

Yes Yes

Yes Yes

No Yes

Yes Yes

Yes Yes

Yes Yes

Yes Yes

Yes Yes

No Yes

Yes Yes

42

12 ACCESSORIES

Replacement Meter and Meter accessories

Item Eutech Instruments

Order Code

Waterproof pH 300 Hand-held pH meter in
carrying case kit. Complete with temperature
probe, pH electrode (1m cable) and pH carrying
kit set.

Waterproof pH 310 Hand-held pH meter in
carrying case kit. Complete with temperature
probe, pH electrode (1m cable) and pH carrying
kit set.

Hard plastic carrying case kit for pH 300/310
meter.

Waterproof pH 300 Hand-held pH meter
complete with temperature probe only.

Waterproof pH 310 Hand-held pH meter
complete with temperature probe only.

Temperature probe for waterproof pH 300 & pH
310 meters

Epoxy body double junction pH electrode with 1­m cable.

“3-in-1” pH / Temperature combination electrode
with 1-m cable for waterproof pH 300/310 meter.

EC-PHWP300/02K 35617-70

EC-PHWP310/02K 35618-72

EC-PHWP-KIT (with
3 pH buffer solution
(pH 4.01, 7.00, &

10.01) in 60-ml
bottle, and 1 empty
rinse/waste water
bottle (480-ml)

EC-PHWP300/01 35618-02

EC-PHWP310/01 35618-12

EC-PHWPTEM-01W 35618-05

EC-FE72522-01B 35641-51

EC-FE73528-01W 35808-71

Oakton Instruments

Order Code

35614-79 (Includes
five of each pH buffer
pouch)

"Temperature probe
sold separately"

"Temperature probe
sold separately"

43

Calibration Solutions

Item Eutech Instruments

Order Code

pH 4.01 buffer solution, 480 ml bottle (1 pint) EC-BU-4BT 00654-00

pH 7.00 buffer solution, 480 ml bottle (1 pint) EC-BU-7BT 00654-04

pH 10.01 buffer solution, 480 ml bottle (1 pint) EC-BU-10BT 00654-08

pH 4.01 buffer sachets, 20 ml x 20 pcs. EC-BU-4BS 35653-01

pH 7.00 buffer sachets, 20 ml x 20 pcs. EC-BU-7BS 35653-02

pH 10.01 buffer sachets, 20 ml x 20 pcs. EC-BU-10BS 35653-03

pH De-ionized water rinse sachets, 20 ml x 20
pcs

pH sachet assortment pack – 5 each of pH 4.01,
pH 7.00, pH 10.01 and de-ionized water sachets
per box.

Protein cleaning solution for pH electrode EC-DPC-BT 00653-06

Storage solution for pH electrode EC-RE-005 00653-04

Note: pH buffer solutions (480-ml bottle, 1 pint) have ±0.01 pH accuracy at 25 °C.

Sachets are individually sealed, single use pouches containing 20 ml of fresh, contamination free calibration
solution. pH buffer sachets have ±0.01 pH accuracy at 25°C.

EC-RIN-WT 35653-00

EC-AST-PK 35653-04

Oakton Instruments

Order Code

44

Carrying Case Kit for pH 300/310

45

13 ADDENDUM 1: METER FACTORY DEFAULT

SETTINGS

Resetting the meter to factory default settings clears all calibration data and most other setup

functions you might have changed. The following settings will remain as you have set them:

• Temperature unit of measure (°C or °F) – only for pH 310 meter

• The temperature offset calibration value.

• Clock function – only for pH 310 meter

Type Parameter P No. Default Remarks

CLr Memory clear P1.0 No Retains your current settings

CAL View pH calibration data P2.1 –– Calibration data for 1st buffer

P2.2 –– Calibration data for 2nd buffer

P2.3 –– Calibration data for 3rd buffer

P2.4 –– Calibration data for 4th buffer

P2.5 –– Calibration data for 5th buffer

(only in pH 310 meter) P2.6 –– Calibration data for 6th buffer (DIN only)

ELE View electrode offset P3.1 0.00 mV No offset adjustment

View electrode slope P3.2 100.0 % No slope adjustment

View relative mV offset P3.3 0 mV No mV adjustment

COF Ready indicator P4.1 Ready On Ready indicator on; auto endpoint off

# pH calibration points P4.2 3 3 pH calibration points available (1 – 5 pt

Calibration buffer selection

sets(pH 310 meter only)

°C or °F (pH 310 meter) P4.4 No default °C or °F remains as selected

CLO Setting year, date and time

(in pH 310 meter only)

rSt pH factory default

For pH 300 meter
For pH 310 meter

P4.3 USA

P5.0 No default Year, date and time remain as selected

P5.0
P6.0

No

range)

Retains your current settings

46

14 WARRANTY

This meter is supplied with a three -year warranty, six-month warranty for probe, against significant

deviations in material and workmanship.

If repair or adjustment is necessary and has not been the result of abuse or misuse within the

designated period, please return – freight pre-paid – and correction will be made without charge.

Eutech Instruments/ Oakton Instruments will determine if the product problem is due to deviations or

customer misuse.

Out of warranty products will be repaired on a charged basis.

Exclusions

The warranty on your instrument shall not apply to defects resulting from:

 Improper or inadequate maintenance by customer

 Unauthorized modification or misuse

 Operation outside of the environment specifications of the products

47

15 RETURN OF ITEMS

Authorization must be obtained from our Customer Service Department or authorized distributor

before returning items for any reason. A “Return Goods Authorization” (RGA) form is available

through our authorized distributor. Please include data regarding the reason the items are to be

returned. For your protection, items must be carefully packed to prevent damage in shipment and

insured against possible damage or loss. Eutech Instruments/ Oakton Instruments will not be

responsible for damage resulting from careless or insufficient packing. A restocking charge will be

made on all unauthorized returns.

NOTE: Eutech Instruments Pte Ltd/ Oakton Instruments reserves the right to make improvements in

design, construction, and appearance of products without notice.

48

For more information on Eutech Instruments/ Oakton Instruments’ products, contact
your nearest distributor or visit our website listed below:

Oakton Instruments

P.O Box 5136,
Vernon Hills, IL 60061, USA
Tel: [phone]
Fax: [phone]

E-mail: [email protected]
Web-site:

www.4oakton.com
www.oaktoninstruments.com

Eutech Instruments Pte Ltd.
Blk 55, Ayer Rajah Crescent,

#04-16/24 Singapore 139949
Tel: [phone]
Fax: [phone]
E-mail:

[email protected]

Web-site: www.eutechinst.com

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