Instruction Manual 

pH/Ion 510 

Bench pH/Ion/mV Meter 

® Fis er Science 

Education 

CE ISO 9001 . -~----~--- ---· ! .... ! .. ;. ... : .... --- ~ 

68X090829 

Rev. 0 Nov 05 
PREFACE 

Thank you for choosing the pH 510 pH/mV/Temperature or I on 510 lon/pH/mV/Temperature bench 

meter. 

The instruction manual functions in two ways: firstly as a step-by-step guide to help you operate the 

510 series meter. Secondly, it serves as a handy reference guide. 

The instruction manual is written to cover as many anticipated applications of the pH/Ion 510 Bench 

meter series as possible. If there are doubts in the use of the instrument, do not hesitate to contact 

the nearest Authorized Distributor. 

Fisher Science Education 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 Fisher Science Education. 

Note: Fisher Science Education reserves the right to make improvements in design, construction, and 

appearance of our products without notice. 

Copyright© 2005 All rights reserved. 

Fisher Science Education 
TABLE OF CONTENTS 

1 INTRODUCTION .............................................................................................................................. 1 

1 .1 I ntrod uci ng the 51 0 Bench Series ............................................................................................................. 1 

1.2 Custom LCD ............................................................................................................................................. 1 

1.3 Keypad ..................................................................................................................................................... 2 

1.4 Rear Instrument Panel .............................................................................................................................. 3 

2 STARTING UP ................................................................................................................................. 4 

2.1 Connecting the Sensor Electrode ................. ....................... ................. ..... .............................................. .4 

2.2 Connecting the Temperature Probe ...... .......... .. ....................................................................................... 4 

2.3 Connecting the A/C Adapter ......................................... .. .............. .. ................ .... .. ................ .................... 4 

2.4 Connecting the Chart Recorder .............. ................................... ..... .. .. ........... .............. .. ........................... 4 

2.5 Connecting the Electrode Holder (Optional) .............. ..... .. ............. .......... .. ............... .. .. ............................ 5 

2.6 Steps Prior to Calibration ........... ............................... ............. ............. .... ..... ... .... ... ................................... 6 

3 CALIBRATION ................................................................................................................................. 6 

3.1 pH Calibration .. .............................................................. .. .. ....................... .. ...... .. ......... ............................. 6 

3.2 I on Concentration Calibration (For I on 510 only) ..................................... .. .......... .......... .. .. ....................... 9 

3.3 mV Calibration ........................ ................................................................................................................ 11 

3.4 Temperature Calibration ......................................................................................................................... 12 

4 MEASUREMENT ........................................................................................................................... 13 

4.1 Automatic Temperature Compensation (ATC) ......................................................... .............................. 13 

4.2 Manual Temperature Compensation {MTC) ....... ...... .............................................................................. 13 

4.3 Taking Measurements .. ........................................................................................................................... 14 

4.4 HOLD Function ....................................................................................................................................... 15 

4.5 Storing and Recalling Data from Memory ................ ............................................................................... 15 

5 SETUP FUNCTIONS ..................................................................................................................... 17 

5.1 P1.0 Clear Memory .................................. .............................................................................................. 17 

5.2 P2.0 Viewing Electrode Diagnosis ........................................................................................................ 18 

5.3 P3.0 Selecting pH Buffer Standard .............................................................................................. .......... 19 

5.4 P4.0 Meter Reset. ................................................................ .. ................................................................ 19 

6 pH Electrode Maintenance .......................................................................................................... 20 

6.1 Storage ........................................................................................ .............................. ............................. 20 

6.2 After Use ........................... .. ................................. ................................................................................. . 20 

6.3 Electrode Cleaning .................................................................................. ........ .. ......... ............ ...... ..... ..... 21 

6.4 pH Electrode Rejuvenation ............................................................ ................. ... ...... ..... ..... ........... .......... 22 

7 TROUBLESHOOTING GUIDE ..................................................................... ................................. 23 

7.1 Error Messages ............................. ...................... ... ...... .. ... .... .. ........ ....................... ................................ 23 

7.2 Troubleshooting ...................................... ......... ............... ... .... ................ ................................................. 24 

8 ADDITIONAL INFORMATION ....................................................................................................... 25 

8.1 pH and Temperature ............ ............. .. .. ....... ........... .. .. .... ........................ ............................................... 25 

8.2 Use of Standard pH Buffers .............. .. ... ................................................................................................ . 25 

8.3 Standard pH Buffers .................................................................................................................... ....... ... . 25 

8.4 Specifications ................................................................................................................ ......... .. ... .... ... .... 26 

9 WARRANTY ............................................................................................................. .. ..... .. .. .......... 27 

10 RETURN OF ITEMS ...................................................................................... ................................ 27 
Instruction Manual pH 510/ lon 510 

1 INTRODUCTION 

1.1 Introducing the 510 Bench Series 

The pH 51 0 and I on 510 bench meters are microprocessor-based which incorporates new ASIC (Application 

Specific Integrated Circuit). It is designed with convenience in mind, and offers many advanced user-friendly 

features. The meters are capable of storing and recalling up to 50 data sets in its non-volatile memory. In 

addition, as a space saver, an optional swivel electrode holder can be attached at the either side of bench 

meter for resting the electrodes and probes during operation. 

The pH 510 meter is capable of measuring pH/ORP with Temperature; while the I on 510 meter measures I on 

Concentration/pH/ORP with temperature. It is equipped with a large customized LCD (Liquid Crystal Display) 

with simultaneous display of the measured values for easy reading. It is most ideal for routine pH/Ion 

Concentration measurement in indoor applications. 

1.2 Custom LCD 

The 510 meter is characterized by a large custom dual LCD. The display has mode annunciators for pH, mV, 

ppm and temperature readings. The secondary (lower) display shows the temperature reading simultaneously 

with the primary (upper) display that shows the measured values of pH, ppm or mV. Special annunciators such 

as units of measure, error message, graphical icons and modes of operation are arranged around both primary 

and secondary display to give you a comprehensive yet uncluttered display. 

SETUP -The meter 

is in SETUP mode. 

HOLD- The displayed 

MEAS- The instrument is in 

the measurement mode. 

EADY 

CAL- The instrument is in 

the calibration mode. 

value has been frozen.---+-HOLD -8.8.8.8 

R -1.8.8.8 ERR- An error in 

operation has occured. 

Buffer- Prompts user 

to select buffer during 

calibration, or indicates 

buffer error when 

flashing together with 

the ERR annunciator. 

ELECTROD6- indicates 

electrode error when it 

appears with ERR. 

pH- Indicates buffer 

values of respective 

USA or NIST buffer 

option set. 

MEM- Data is stored 

into memory 

Shows the 

respective mode 

of operation. 

ATC (Automatic 

emperature 

Compensation) 

activated. If ATC is not 

displayed, temperature 

probe is not connected. 

In this case the Manual 

Temperature 

Compensation is 

activated. 
Instruction Manual pH 510/ lon 510 

1.3 Keypad 

A large splash proof membrane keypad with tactile feedback makes meter easy to use. Names and symbols 

describe the function button controls. 

Key Measurement Mode Calibration I Setup Mode 

ON/OFF Powers the meter ON/OFF. When the meter is - switched on, it automatically starts in the last 

mode of operation. 

CALIMEAS Toggles between the measurement and - calibration modes of the meter. In SETUP 

mode, pressing CALIMEAS key returns to the 

measurement mode. 

MODE Toggles between the different measurement Switches from pH to Temperature in pH 

modes available pH/Temperature/mV/Ion. (lon calibration mode 

mode only applies with the ION 510.) 

MI/A Ml inputs measurements into memory and A scrolls values in mV calibration mode 

scrolls through memory values. and selects temperature values and ion 

options in calibration mode. Scrolls to 

next program in the SETUP mode. 

MRIV MR recalls measurements from memory and V scrolls values in mV calibration mode 

scrolls through memory values. and selects temperature values and ion 

options in calibration Scrolls to next 

program in the SETUP mode. 

HOLD Freezes a measurement on the display. Press - again to get current readings. 

ENTER Enter functions in the memory mode. Confirms and enters the value selected 

for calibration. 

You can also configure functions like Meter Reset, Memory Clear and Selection of pH Buffer Standard via the 

keypad. Please refer to Section 5 for more information on the above functions. 

2 
Instruction Manual pH 510/ lon 510 

1.4 Rear Instrument Panel 

This 510 series meter provides a complete set of connectors for the various accessories commonly used. 

Listed in the table are the details of the connections that you can make. 

Rear View of Meter 

1-~·-~~~ - -

Connection Function 

ATC For phone jack connection from the temperature probe for Automatic Temperature 

compensation. The probe should be a 30Kn thermistor type. 

INPUT For connection to sensor electrodes with BNC type connectors. The meter accepts any pH, 

ORP or ISE with BNC connector. Always ensure that the connector is clean and dry. 

REF For connection to pin type reference electrode normally used with half cell (mono) type pH 

electrodes or ISEs. 

REC For connection to strip chart recorders. Use subminiature plug with positive tip. 

GND For connection to the ground earth jack (standard tip connectors). 

DC For connection for the AC/DC power adapter 

3 
Instruction Manual pH 510/ lon 510 

2 STARTING UP 

Connect the accessory connectors at the rear of the instrument panel. During operation, it is important that 

water does not get onto the BNC connector. Also avoid touching the connector with soiled or wet hands. 

2.1 Connecting the Sensor Electrode 

Slide the electrode connector of the electrode over the socket of the meter's BNC connector marked 'INPUT'. 

The meter can accept any standard pH, ORP, or ion Selective Electrode with a BNC connector. Align the slot 

of the electrode connector with the posts of the socket. Rotate the connector clockwise until it locks. For 

separate reference electrodes, push the electrode pin into jack marked 'REF'. 

2.2 Connecting the Temperature Probe 

Insert the temperature probe (provided) into the connector marked 'ATC'. 

2.3 Connecting the A/C Adapter 

Slide in the adapter jack of the A/C adapter into the back panel marked 'DC' until it is firmly seated. Ensure that 

the power is switched off before installation and the correct voltage adapter is used. 

2.4 Connecting the Chart Recorder 

You can connect chart recorders or external output devices for continuous printout. Plug in the input connector 

and ground pin of the chart recorder into the ports marked 'REC' and 'GND' respectively. 

Sensor electrode Chart recorder 

4 
Instruction Manual pH 510/ ion 510 

2.5 Connecting the Electrode Holder (Optional) 

The integral electrode holder serves as a handy holder 

for mounting a few pH/Ion electrodes or a temperature 

probe during measurement or when idle. 

This meter's base plate has a side metal bar to which 

you can attach an integral swivel electrode holder. 

You can mount the electrode holder on either right or 

left side of the meter. 

To position the electrode arm: 

Use a Phillips screwdriver to remove the screw holding 

the electrode holder. Slide the side metal bar until the 

second screw slot lines up with the original screw 

hole. Use the screw removed earlier to secure the 

electrode holder into position. 

NOTE: The side metal bar is reversible. If desired, 

remove screw holding electrode holder base and slide 

out of brackets, Slide base into brackets on opposite 

side and tighten screw. 

Base of 

Electrode 

Holder 

5 

Bottom of Meter 

0 0 

• 

To install the electrode arm to the meter: 

To mount the electrode arm into the metal rod on 

the side bar, align the slot with the metal rod and 

base of electrode arm. Push it downwards until it 

fully sits into position. Avoid using excessive force 

when fixing or removing. The electrode arm is 

ready for use. 

NOTE: Move the base of the electrode holder if 

you wish to swing the electrode holder about. To 

prevent the meter from toppling over causing 

accidental spills, DO NOT swing the body of the 

electrode holder. 

• 
Instruction Manual pH 510/ lon 510 

2.6 Steps Prior to Calibration 

2.6.1 Switching 'ON' and 'OFF' the meter 

Press ON key to switch meter on. All the LCD segments will display momentarily for a few seconds and the 

LCD then switches to the last measurement mode. To switch meter off, press OFF key. 

2.6.2 Selecting Measurement Mode 

The measurement modes available for the pH 510 meter are pH, mV (for ORP) and Temperature, while the lon 

510 meter has I on, pH, mV and Temperature measurement modes. Select the correct mode of operation by 

pressing the MODE key, and each press takes you to next measurement mode. When selecting a particular 

parameter the respective mode annunciator displays at the right hand side of primary display; these include 

[pH] for pH, [

0

C] for Temperature, [ppm] for lon Concentration and [mV] for Millivolt. 

2.6.3 Meter Reset 

On first use, it is not necessary to reset meter before calibration as it has been factory-calibrated. However if 

you wish to reset the meter to factory default refer to Section 5.4. 

NOTE: Re-calibration of meter is required before measurement after the meter is reset. Likewise if you wish to 

prepare a new set of measurements, you may reset all the last calibrated pH values simultaneously for added 

convenience. Caution: All calibration values and memory data will be erased upon activation. Recalibration is required. 

2.6.4 Selecting pH Buffer Standard 

The meter is capable of calibrating based on either USA or NIST pH buffer standards. Please refer to Section 

5.3 P3.0 for details on how to change the USA buffer standard to the NIST standard on the meter itself. Refer 

to Section 8.4.1 for more details on pH buffer standards available. 

NOTE: Remove protective rubber cap or storage bottle (if any) from the electrode before proceeding with 

measurement or calibration. Take care not to exert too much force as this may cause damage to the electrode. 

Whenever the electrode is not in use, put it into storage bottle or protect the electrode with the rubber cap 

provided. Refer to the Section 6 on Probe Maintenance for more details. 

3 CALIBRATION 

3.1 pH Calibration 

The 510 series bench meter is capable of multi-point calibration (up to 3 points) for high accuracy across the 

measurement range. The 3-point calibration offers flexibility of calibrating using either USA or NIST buffer 

standards with their 3 internationally accepted calibration points namely: 

USA standard buffer options: pH 4.01, pH 7.00 and pH 10.01 

N 1ST standard buffer options: pH 4.01, pH 6.86 and pH 9.18. 

For ATC measurements, attach the temperature probe to the meter. The ATC mode annunciator shows on the 

display. Insert the probe into the solution to be measured so that the sample temperature can be recorded and 

pH readings automatically temperature compensated. If manual temperature compensation is preferred, do not 

plug a temperature probe into the meter. 

DO NOT REUSE SOLUTIONS AFTER CALIBRA T/ON. Contaminants in the solution can affect the calibration, 

and eventually the accuracy of the measurements. 

6 
Instruction Manual pH 510/ lon 510 

One point calibration (Offset calibration) should only be carried out with pH 7.00 or pH 6.86; otherwise 

calibration will not be accepted. For Slope to Slope calibration (two points calibration), the first calibration point 

will only be successfully registered in the meter after the second point calibration has been completed. 

It is recommended that you perform at least a 2-point calibration using buffers that bracket (one above and one 

below) the expected sample range, starting with pH 7 buffer first. Select a pH 4, 7 or 10 buffer in sachets or 

bottles from standard buffer solutions. 

All new calibrations will replace the existing stored calibration data. 

1. Press ON/OFF key. All the LCD segments will be displayed 

momentarily. The LCD switches to pH measurement mode. If 

necessary press MODE key to select pH mode. 

NOTE: The meter starts in the same measurement mode that it 

was switched off. 

2. The customized LCD display will indicate the following: 

3. 

Display 

MEAS 

pH 

oc 

Remarks 

Measurement mode is selected 

Unit of measurement 

Measured temperature reading 

ATC Automatic Temperature Compensation 

(If temperature probe or "AII-in-One" probe is 

connected)" 

Rinse the pH electrode well with deionized water or rinse solution. 

If using the ATC function with a separate temperature probe, 

thoroughly rinse the temperature probe as well. (Do not wipe the 

electrode or the temperature probe as this may cause a buildup of electrostatic charge and will create calibration and 

measurement instability!). 

One Point Calibration 

4. Select the first pH buffer, pH 7.00 (or pH 6.86) and pour some into 

a clean container. 

5. Dip both probes into the standard calibration buffer. The end of 

the probe must be completely immersed into the buffer. Stir the 

probes gently to create a homogenous solution. 

6. Press CALIMEAS key to enter the pH calibration mode. The 

annunciator [CAL] appears on top of the LCD to indicate the 

meter is in pH calibration mode. The upper display will show the 

measured reading while the lower display indicates appropriate 

pH standard buffer solution being used. 

NOTE: The meter automatically recognizes the buffers in the 

buffer standard you have set in the SETUP mode, i.e. either USA 

(pH 4.01 , 7.00 or 10.01) or NIST (pH 4.01 , 6.86 or 9.18) buffers. 

7 

~ 

MEAS 

READY -, -u 1 pH 

1.1 -1 

2u8 ·c I. ATC 

e 1 

CAL 

I)EADY -, 1-1-1 pH 

1.1_1_1 

1r1r1 pH 

~ I.LILI 

81 

"' CAL l / 

READY - -, 1-11-1 ~ 

1.1_11_1 "' 

/ 1 1

r1r1 

~ I.LILI pH 

8 1 MEAS 

READY -, 1-11-1 pH 

1.1_11_1 

2Y.B ~~c 

Figure 1: 1st-point calibration 
Instruction Manual 

CAL 

Fif!ure 2: Calibration error 

CAL 

READY 1_11-IC pH 

1.1_1_1 

urn pH 

I.LII 

Figure 3: 2nd-point calibration 

CAL 

READY 11-11_1_1 pH 

11_1.1_1 I 

1[1.01 pH 

~ 

Figure 4: 3rd-point calibration 

HINT: If the selected 

buffer value is not within 

the accepted window (see 

below) from the measured 

value: the electrode and 

buffer icon blink and ERR 

annunciator appears next 

to the secondary display. 

(See Figure 2 above) 

Press CALIMEAS key to 

exit the ERR condition. 

Window of Accepted 

Values:-

USA 4.01 ±1.00 

7.00 ±1.50 

10.01 ±1.00 

NIST 4.01 

6.86 

9.18 

±1.00 

±1.25 

±1.00 

pH 510/ lon 510 

7. Wait for the measured pH value to stabilize (when the [READY] 

indicator displays in the left-hand corner). 

NOTE 

If the upper measured display is not within the buffer acceptable 

window (refer to Hint below) an error message and the electrode 

icon flash upon pressing the ENTER key. Refer to Section 7, 

Troubleshooting Guide. Check electrode condition and recalibrate. 

Press CALIMEAS key to exit calibration and resume to the 

measurement mode. 

8. Press the ENTER key to confirm the calibration. The upper 

display flashes the calibration value momentarily before storing 

the calibration point in the meter. The lower display then toggles 

between the next calibration buffer values. 

9. If you are performing a one-point calibration, press CALIMEAS 

key to return to the measurement mode and start taking pH 

readings (see Figure 1 ). 

NOTE 

To exit from pH calibration mode without confirming calibration, DO 

NOT press ENTER key in step 9. Press the CALIMEAS key instead. 

Two to Third Point Calibration 

10. If you are performing a multi-point calibration (i.e. second-point 

or more) go to step 11. 

11. Rinse the probes with deionized water or rinse solution to avoid 

cross contamination, and place them in the next pH buffer, say 

pH 4.01 buffer. The lower display of the meter automatically 

switches to the pH buffer solution selected. 

12. Wait for the measured pH value to stabilize (when the [READY] 

indicator displays in the left-hand corner). (see Figure 3). 

13. Press the ENTER key to confirm the calibration. The upper 

display flashes the calibration value momentarily before storing 

the calibration point in the meter. The lower display then switch 

to the next calibration buffer value. 

14. If you are performing a two-point calibration, then press the 

CALIMEAS key to return to the measurement mode and start 

taking pH readings. 

15. If you are performing a three-point calibration go to step 16. 

16. Rinse the probes with deionized water or rinse solution, and 

place them in the next pH buffer as indicated in the lower 

display, say pH 10.01 buffer. 

17. Wait for the measured pH value to stabilize (when the [READY] 

indicator displays in the left-hand corner) (see Figure 4 ). 

18. Press the ENTER key to confirm the calibration. The upper 

display flashes the calibration value and then stores the 

calibration point in the meter. The meter automatically returns to 

the pH measurement mode after a three-point calibration is 

performed. 

8 
Instruction Manual pH 510/ lon 510 

3.2 I on Concentration Calibration (For I on 510 only) 

The lon 510 meter is capable of up to 3-point ion calibration (minimum 2 point) with choice of 4 options to 

ensure accuracy across the entire measurement range. Note that the ion measurement mode accepts input of 

only ± 500 mV. I on calibration options include 0.1 0, 1.0, 10.0 or 100.0 ppm. All calibration should be at least 

one decade apart from each other. For example you may perform 3 point calibration to 0.1 0, 1.0 and 1 0.0, or 

2-point calibration to 10.0 and 1 00.0. If 1-point calibration is performed an error message "Er2" is displayed. If 

any of calibration points are not within 1 decade, an error message "Er4" will be displayed at the end of 

calibration process. 

Calibration values are successfully stored if the ISE slope is within the specified tolerance of 15mV/decade 

(minimum) and 90mV/decade (maximum), otherwise an error message "Er3" is displayed (see Figure 7). The 

calibration values are not stored into the meter's built-in memory if any error message appears after each 

calibration process. Re-calibration is necessary as calibration is unsuccessfully attempted in this instance. 

Check that your ISE and standard solutions are in good working conditions. 

Ensure that you use new or fresh standard solutions during calibration. Do not reuse ion standard solution as it 

may be contaminated and affect the calibration and accuracy of measurements. Always store standard 

solutions in a dry, cool environment if possible. Before use, remove plastic protective cap of ISE. Briefly rinse 

the electrode with clean deionized water to remove any residues. 

Rinse probes before and after each calibration or sample measurement to avoid cross-contamination. For 

more details please refer to Manufacturer's care and maintenance guide. 

NOTE: The ion calibration values will be lost once power is disconnected; only pH and mV calibration 

values will be retained. 

1. Connect an lon Selective Electrode (ISE) to the BNC input connector 

on the back of the meter. Turn the meter ON. 

2. Press MODE key (if needed) to select ion measurement mode. If 

there is no old calibration values, then the meter displays "---" in the 

upper display in measurement mode. 

3. Dip the ISE into the first calibration standard. Make sure to start with 

the calibration standard that has the lowest concentration and move 

up to the standards that have higher concentrations. 

Swirl it gently. Press CAL key to enter the ion calibration mode. The 

[CAL] indicator appears above the upper display and the upper 

display reads "0.1 0". The lower display shows the corresponding 

absolute mV value of sample measured. 

4. The first calibration point of 0.10 ppm appears on the display. If you 

DO NOT wish to calibrate to this point, press (up arrow) to skip and 

continue to the next calibration point of 1.0 ppm or 1 0.0 ppm. 

5. If you DO wish to calibrate to 0.10 ppm, allow the mV reading to 

stabilize. When the reading stabilizes the [READY] indicator will 

appear on the display. Stabilization may take a few minutes 

depending on electrode and standard concentration. 

6. Press ENTER key to confirm your first point calibration (see Figure 5). 

After calibration, the display will show the next calibration option, i.e. 

1.0 ppm. Proceed by rinsing the electrode with deionized water 

before placing it in the next calibration standard i.e. 1.0 ppm. 

7. Allow the meter to stabilize in the next calibration standard. Wait for 

the [READY] indicator to appear before you press the ENTER key to 

confirm the second calibration point. The upper display flashes 

momentarily then moves to the next calibration point of 10.0 ppm. 

NOTE: If you are performing a 2-point ion calibration, press 

CALIMEAS key. "SLO" appears in the upper display with the [mVJ 

indicator and the number in the lower display is the electrode slope in 

mV (see Figure 6). You are ready to take ion measurements. If the 

slope is outside the acceptable limits or if incorrect standards have 

been used the upper display will show "Er3" (see Figure 7). 

9 

MEAS 

11-1 -1 ppm 

11_1.1 

59.b 

@ EAS ! 

CAL 

1-111-1 ppm 

1_1.11_1 

C03 

~ J._ 

! 

CAL 

READY rl 11-1 ppm 

~I' 1_1. 11_1 

~ 59.3 

l " CAL I / 

READY - ~-~ 11-1 ~m 

1_1.11_1 / c q -, " ~ ~ .:J 

Figure 5: 1st-point calibration 
Instruction Manual 

If you are performing a 3-point calibration, rinse off the electrode 

with deionized water, place it in the next calibration standard and 

proceed as follows. 

8. Allow meter to stabilize in the next calibration standard. Wait for the 

[READY] indicator to appear before you press the ENTER key to 

confirm the third calibration point. The upper display flashes for a 

few seconds then "SLO" appears in the upper display with the mV 

indicator, the number in the lower display is the average electrode 

slope in mV (see Figure 6). After a few seconds the meter reverts 

to the measurement mode. You are now ready to take ion 

measurement. 

NOTE: All the calibration values are successfully stored. Otherwise 

error message will appear in the LCD if the calibration was 

unsuccessful with no values stored into memory. 

NOTE: You may compare the average electrode slope value with 

the expected slope value for your electrode from your electrode 

manual to verify electrode operation. 

10 

pH 510/ lon 510 

HINT: Minimum of 2 

points and maximum 

of 3 points are 

allowed for /on 

Calibration. All 

calibration points 

should be at least one 

decade apart, i.e. 

valid calibration 

points are 0.1, 1, 10 

ppm or 1, 10, 100 ppm 

or 0.1, 1 ppm or 1, 10 

ppm or 10, 100 ppm. 

mV 

Figure 6: Slope value in m V 

CAL 

• ERR 

y 

Figure 7: Error message Er3 

if slope not within range 
Instruction Manual 

3.3 mV Calibration 

1. Make sure the meter is on and if necessary, press the MODE key to 

select mV mode. The [mV] indicator appears in the upper right-hand 

corner of the display. 

2. Press the CALIMEAS key. The [CAL] indicator appears above the 

upper display that displays the relative mV reading. The lower 

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 upper display is the same as the 

absolute mV value. The range of adjustment is -1999 mV to 1999 

mV (resolution is 1 mV); of which from -199.9 to 199.9 mV the meter 

gives you a resolution of 0.1 mV. 

3. Press A or v key to enter the relative mV value that matches your 

desired reading. 

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

automatically returns to the measurement mode. The upper display 

now shows the relative mV reading. The [R.mV] indicator appears in 

the upper right hand corner. 

NOTE: New mV calibrations will override existing stored mV 

calibration data. The meter retains stored mV calibrations even when 

the meter is turned off. 

11 

...... 

pH 510/ lon 510 

CAL mV 

1 IC l_l IL_I. I 

,2cy I :J. 

el CAL mV 

1 ICII ICI_I. I 

12c Ll I ::J. I 

8! MEAS R.mv 

1-11-1 I 

ICCI. I 

c'LI.S ~~c 
Instruction Manual pH 510/ lon 510 

4.3 Taking Measurements 

Be sure to remove any electrode soaker bottle or protective rubber cap from the electrode before 

measurement. 

To take readings: 

1. Rinse the electrode with distilled or tap water before use to remove any impurities adhering to the 

electrode body. If the pH electrode had dehydrated, soak it for 30 minutes in EC-REOOS/ 00653-04 

electrode storage solution. (See Electrode Care - Section 6) 

2. Press ON key to switch on meter. The [MEAS] annunciator appears on the top center of LCD. The ATC 

annunciator appears in the lower right hand corner to indicate ATC if a temperature probe is plugged. 

(For MTC, refer to Section 4.2). 

3. Dip the electrode and temperature probe into the sample, making sure that the glass bulb of the electrode 

must be completely immersed into the sample. Stir the probes gently to create a homogeneous sample. 

4. Allow time for reading to stabilize. When the readings stabilize, a [READY] annunciator displays. The 

READY mode shows the readings are stable within a range of ±0.01 pH. When this occurs, the [READY] 

annunciator appears on the top left side of LCD. Take the reading. 

5. To toggle between pH and mV in the pH 510, or to toggle between pH, mV and lon in the I on 510, press 

the MODE key. 

14 
Instruction Manual pH 510/ lon 510 

4.4 HOLD Function 

This feature lets you freeze the value of the measured reading. HOLD can be used anytime when in [MEAS] 

mode. You can store the held reading into memory by pressing Ml key. 

HOLDing a measurement 

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

mode. [HOLD] annunciator will appear on the display. 

Releasing a Held Value 

To release the held value, press HOLD key again. [HOLD] annunciator 

will disappear from the LCD. Continue to take measurements. 

4.5 Storing and Recalling Data from Memory 

HOLD 

"""" 

READY 

MEAS 

The meters allow up to 50 data sets to be stored and recalled into its non-volatile memory in the Last-In-FirstOut (LIFO) sequence. The data set is also stored with specified location as indicated on the display. However 

you can selectively view the data at that specified location for added convenience. 

pH 510 meter: 

• pH and Temperature 

• mV (or Relative mV) and temperature 

I on 510 meter: 

• pH and Temperature 

• mV (or Relative mV) and temperature 

• ion and mV 

For example you can store 32 pH and 18 mV values for the pH 510 or 15 ion, 12 mV and 23 pH values for the 

lon 510. 

Memory Input 

This feature allows you to store measurement readings into memory for 

later review. This mode can be invoked at any time during measurement 

mode or when the reading is frozen ([HOLD] annunciator is displayed on 

LCD by the activation of HOLD key). 

To store reading: 

1. During any measurement or HOLD function, press the Ml key once 

to input data into the memory. 

2. [MEM] annunciator, "StO" and memory number will flash 

momentarily. The meter then returns to the measurement mode. 

3. To continue storing data, press Ml key again. 

NOTE: If the memory is full, the first value stored will be erased to 

create space for the new value. 

15 

MEAS 

READY 1-1 -~r pH 

I 1.1 I 

25.b oc 

ATC 

0 l 

MEM 

-~-

~--r~ 1 _I 1_1 

MEM 2 
Instruction Manual 

Memory Recall 

1. In the measurement mode, press MR key once to retrieve the last 

reading stored. The memory location screen- "MEM", "LOG" and 

the memory number- will flash on the display. 

2. Press the ENTER key to recall the reading stored under that memory 

number. 

3. If necessary, you can selectively choose to view any data that is 

stored by using A or \f key. For example to view the third data 

location set to LOG 3 from last stored location of LOG 5. Use A or \f 

key to set to LOG 3. Press ENTER key to retrieve the data from this 

location. 

4. To continue reviewing additional stored data, press ENTER key 

again. For this instance the next location, LOG 2, will be displayed. 

5. To exit Memory Recall and operate meter, press the MEAS key to 

return to the measurement mode. 

NOTE: Readings stored in memory are retained even of the unit is turned 

off. To erase all readings stored in memory, see Program P1.0 on the 

next page. 

16 

8 

8 

I 

pH 510/ lon 510 

I 

I 

I 

T 

MEM 

MEM 

I-llLl_ll_ 

3 

, 

MEM 

I I .-I pH 

-1. I I 

2b.3 :~c 

MEM 

I I-llLl_ll_ 

2 
Instruction Manual 

5 SETUP FUNCTIONS 

The advanced SETUP mode lets you customize your meter's preferences and defaults: 

P1.0: Memory Clear (Cir) 

P2.0: Viewing electrode data (ELE) 

P3.0: Selecting buffer sets (bUF) 

P4.0: Reset to factory default settings (rSt) 

To enter the SETUP mode: 

1. Turn meter OFF. 

pH 510/ lon 510 

2. With meter off, press and hold the MODE key, and press and release the ON key. The display will show 

the [SETUP] indicator. If the display indicates you are in the measurement mode turn the meter off and try 

step 2 again until [SETUP] appears. 

NOTE: To exit the SETUP mode at anytime without confirming changes press CAL/MEAS until the 

measurement mode appears. You may have to press CALIMEAS key two times before the meter reverts to the 

measurement mode. 

5.1 P1.0 Clear Memory 

Use this program 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. 

1. Enter the SETUP mode as described above. The meter 

automatically goes to program P1.0. Clr appears in the upper 

display and P1.0 in the lower display. 

2. Press the ENTER key to access the program and the lower display 

shows either "nO" or "YES" (depending on last option selected or 

factory default i.e. nO). 

3. Use A or v key to toggle between "nO" or "YES" 

4. Press ENTER key to confirm selection and return to the SETUP 

mode. To continue to the next SETUP, press A or v key to select a 

new program. Otherwise press the CALIMEAS key to return to the 

measurement mode. 

17 

r SETUP MEM 

I-I 

I_LIPl.O 

8 1 

SETUP MEM 

I-I 

I_LInO 

eel 

SETUP MEM 
Instruction Manual pH 510/ lon 510 

5.2 P2.0 Viewing Electrode Diagnosis 

This program lets you check the electrode parameters for diagnostic purposes. Depending on the last display 

mode, displayed electrode information varies. Only these readings can be viewed: 

Last Display Mode Electrode Property 

Offset Slope 

pH in mV % 

I on - in mV 

mV in mV 

1. Enter the SETUP mode as described above. The meter 

automatically goes to program 1.0. 

2. Press A or v key to scroll through the programs until you view ELE 

in the upper display and P2.0 in the lower display. The electrode 

annunciator also appears. 

3. Press ENTER key to access the program P2.0. The lower display 

will read P2.1. 

The information you will see in Program P2.0 will depend upon which 

MODE the meter was in prior to shutting the meter off: 

In the pH measurement MODE: 

P2.1 shows the mV offset of the electrode. Press ENTER key to go 

to P2.2 (see Figure 8). 

P2.2 shows the slope in % of the electrode. 

In the mV measurement MODE: 

P2.1 shows the mV offset of the electrode (see Figure 9). 

In the lon measurement MODE: 

P2.1 shows the average slope of the electrode (see Figure 1 0). 

4. To exit P2.0 program press ENTER key until ELE is in the upper 

display and P2.0 is in the lower display. Press A or v key to 

select a new program OR press CALIMEAS key to return to the 

measurement mode. 

18 

-

SETUP r1 rpH 

ILl 

~ P2.0 

R l 8 I"' SETUP mV 

r -~ 

I. I 

~ P2.l pH 

R 

~ SETUP 

11-11-1 -1 % 

11_11_1. I 

~ P2.2 pH 

Figure 8: slope in% 

SETUP R.mv 

1-1,-1 

1_1.-1 

P2.1 

Figure 'J: m V oJJset 

SETUP mV 

rt-11-1 

1-1.1_1 ppm 

P2.1 

Figure 10: Average slope (mV) 
Instruction Manual 

5.3 P3.0 Selecting pH Buffer Standard 

This program lets you select between two standard calibration buffer sets, 

depending upon your requirements. 

The available standards are USA and NIST. 

1. Enter the SETUP mode as described in this section earlier. The 

meter automatically goes to program P1.0. 

2. Press A or v key to scroll through the programs until you view "bUF' 

in the upper display and P3.0 in the lower display. The buffer 

annunciator also appears. 

3. Press ENTER key to access the program P3.0. The lower display will 

read either "USA" or "nSf' (depending on the previous setting you 

have made; factory default is USA.) 

4. Press A or v key to select the buffer set you require: 

• USA buffers: 4.01, 7.00 and 10.01 

• nSt buffers: 4.01, 6.86 and 9.18 

5. To confirm the buffer standard, press ENTER. All the characters on 

the display will flash momentarily and then returns to P3.0. 

6. To exit P3.0 program press A or v key to select a new program OR 

press the CALIMEAS to return to the measurement mode. 

5.4 P4.0 Meter Reset 

This program resets and clears all memory data and calibration data 

except temperature calibrated value which will be retained. NO is the 

default setting. 

1. Enter the SETUP mode as described in this section earlier on. The 

meter automatically goes to program P1.0. 

2. Press A or v key to scroll through the programs until you view rSt in 

the upper display and P4.0 in the lower display. The mV and pH 

annunciators also appears. 

3. Press the ENTER key to access the program P4.0. The lower 

display will read NO. 

4. Press A or v key to select "NO" or "YES". Select YES erases all 

calibration values for all modes (pH, mV and ion) and all memory 

values. 

5. To confirm the reset, make sure YES is selected and press ENTER. 

All the characters on the display will flash for a second then the 

meter returns to the measurement mode. 

NOTE 

Once YES is selected and ENTER key is pressed; the reset program 

clears all old calibration data and memory data. The data is no longer 

retrievable. You must calibrate the meter before taking any new 

measurements. Meter will however retain buffer set selection (NIST or 

USA). 

19 

pH 510/ lon 510 

SETUP 

111_11 

~ P:J.O 

8 1 

SETUP 

tll_ll ~ USR 

8Gl 

SETUP 

tll_ll 

'-1 nSt 

SETUP 

-I 

1-1 ~-r 

PY.O 

8 

SETUP 

-I 

1-1 ~-r 

nO 

88 

SETUP 

-I 

1-1 ~-r 

~ES 
Instruction Manual pH 510/ lon 510 

6 pH ELECTRODE MAINTENANCE 

pH electrodes are susceptible to dirt and contamination and need to be cleaned regularly depending on the 

extent and condition of use. Refer to Section 6.3 for more details on cleaning pH electrode. 

6.1 Storage 

For best result, always keep the pH electrode bulb wet, preferably with the use of storage solution. pH 4 buffer 

is also acceptable as a storage medium. Do not store in deionized water. The protective rubber cap or 

container filled with the buffer solution provides ideal storage for long periods. 

6.2 After Use 

After measurement is complete, follow the sequence below for storage. 

a) Wash the electrode and reference junction in de-ionized water 

b) If using a refillable electrode, close the refilling hole by returning its rubber sleeve or stopper cap into 

position. 

c) Store the electrode as mentioned above (see Storage). 

6.2.1 Electrolyte Replacement (for refillable e_lectrodes only) 

The reference electrolyte needs to be refilled when the pH electrode has been used for an extended period, or 

when the internal electrolyte has dried up. To accomplish this, follow the procedure: 

1. Remove the protective rubber cap or sleeve to expose the filling port of the electrode. Remove the old 

reference electrolyte by flushing out with a syringe and a flexible tube. 

2. Add in fresh electrolyte until it reaches the level of the refilling port. The reference electrolyte depends on 

your electrode. For double junction or Calomel electrodes, the electrolyte should be 4M KCI (EC-RE001/ 

05992-48). Replace the rubber sleeve. 

3. Rinse the liquid junction with de-ionized water and gently tap dry. 

NOTE 

If these steps fail to restore normal electrode response, you may attempt to rejuvenate it. (See: 6.4 pH 

Electrode Rejuvenation). 

20 
Instruction Manual pH 510/ lon 510 

6.3 Electrode Cleaning 

pH electrodes that are mechanically intact and not in use for a short period of time can be restored to normal 

performance by one or a combination of following procedures: 

a) Salt deposits 

Dissolve the salt deposits by immersing the electrode in a container filled with some tap water for ten to fifteen 

minutes. Then thoroughly rinse with de-ionized water. 

b) Oil/ Grease Films 

Wash the pH electrode bulb in mild detergent and water. Rinse electrode tip with de-ionized water. 

c) Clogged Reference Junction 

Heat a dilute 1% KCI solution to 60-80 °C. Place the sensing portion of the pH electrode into heated KCI 

solution for approximately 10 minutes (as shown above). Care must be taken when performing this procedure. 

Allow electrode to cool while immersing in some unheated KCI solution. (Heating time confirmed at 10 minutes 

on our side, pis take note) 

d) Protein Deposits 

Use Protein Cleaning Solution (EC-DPC-BT/ 00653-06) to remove any protein that is deposited onto pH 

electrode. Allow the electrode to stand in this solution for five to ten minutes. 

21 
Instruction Manual pH 510/ lon 510 

6.4 pH Electrode Rejuvenation 

CAUTION: Proper protective eyewear and precautionary measures must be used when performing the 

rejuvenation procedure as it involves the use of concentrated acid and alkaline. 

Generally, if procedure of storage and maintenance had been closely followed, the pH electrode can be used 

immediately. However, should the electrode response become sluggish, it may be possible that the glass bulb 

has dehydrated. Immersing the electrode in an ideal storage solution (e.g. buffer pH 4 solution) for 1- 2 hours 

can dehydrate the glass bulb. If this fails, the electrode may require re-activation. At no time should you touch 

or rub the glass bulb as this causes the build-up of electrostatic charge. If the above procedure does not reactivate electrode to acceptable status, try rejuvenating electrode by following the procedure outlined below. 

6.4.1 Rejuvenation Procedure 

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

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

3. Dip and stir the electrode in concentrated acid (e.g. HCI, H2S04) for 5 minutes. 

4. Repeat Step 2. 

5. Dip and stir in strong base (NaOH) for 5 min. Leave for 15 minutes in tap water. 

6. Test with standard calibration buffer solutions. 

Finally, test with standard calibration buffer solutions to see if the electrode yields acceptable results. You may 

repeat steps 3-6 again for better response (maximum 3 times). If the response does not improve, then the 

electrode has completed its useful life. Replace with a new electrode. 

22 
Instruction a a pH 510/ ion 510 

7 TROUBLESHOOTING GUIDE 

7.1 Error Messages 

The table provides a quick guideline for diagnosis of possible problems indicated by the messages generated 

by the 510 meter series. The table also provides possible solutions to problems encountered. 

Diagrams inserted below. 

Display Screen ERROR INDICATES CAUSE CORRECTIVE 

MESSAGE ACTION 

Err. 2 (in upper Too few Meter calibrated with Recalibrate using 2 or CAL 

READY fr2 display) during ion calibration points only 1-point in ion more points 

calibration calibration 

""' - L 

- --L Err. 3 (i u er Slope error ion calibration Recalibrate using fresh 

Er3 is Ia I solu ion no ithin ion solutions 

cali ra · acce able range 

-- 0 Replace electrode. 

~~ ERR 

eca e 

CAL Err. 4 (in upper Calibration pain s Cali ra ·an i s Recalibrate using 

READY Er '-1 display) during ion more than 1 more an deca e calibration points 1 

calibration decade apart apart decade apart. 

.... ~ 

tulEAS Err (annunciator) Wrong keypad Button does not work Release key. Select 

READY 'n23pH input in the current valid buttons 

IU. operation mode depending on mode. 

'"' 25. .,.G 

I ATC 

Electrode icon Calibration error Buffer value does not Use fresh buffer CAL 

I l25pH (indicator) match value displayed solution or check 

I or electrode is electrode connection. 

disconnected or 

ii~ H~'IUO I pH failing Possibly replace 

electrodes. 

MEAS Ur or Or (in upper Measured value is Electrode not Make sure electrode is 

'I display) out of range connected connected 

ur p"m Electrode clogged, Clean or replace 

18&5 dirty or broken electrode 

Meter not calibrated. Recalibrate the meter. 

_ .. :;: Measurement is Treat samples to bring Dr under range or over within meter measuring 

range range 

23B:rc 

23 
Instruction Manual pH 510/ lon 510 

7.2 Troubleshooting 

PROBLEM PROBABLE CAUSE REMEDIAL ACTION 

No display a) Mains power not switched on. a) Switch on the power supply. 

b) AC Adapter socket not inserted properly. b) Re-insert AC Adapter socket. 

Unstable reading a) Insufficient reference electrolyte in a) Fill electrode with reference electrolyte. 

electrode. 

b) Broken electrode b) Replace electrode. 

c) External 'noises' or induction (e.g. c) Remove or switch off interfering device. 

electrical 'noise' caused by a nearby 

motor) 

d) Dirty electrode. d) Clean the electrode. Hydrate, then rejuvenate if 

necessary. 

Slow response a) Dirty electrode. a) Clean electrode. Hydrate, then rejuvenate if 

necessary. 

Meter not a) HOLD mode in operation. a) Cancel HOLD mode. Press Hold button. 

responding to key b) Internal program error. b) Reset all internal programs by removing and press reinserting the A/C adapter. 

24 
lnstructio • s- pH 510/ lon 510 

8 

8.1 pH and Temperature 

Automa ic Te pe a reCompensation (ATC) compensates for temperature changes. Some solutions show an 

increase hile others a decrease in pH with the same temperature change. Record the solution temperature 

along with the pH value, or the measurement may be meaningless. Temperature changes also affect the signal 

the pH electrode sends to the meter and causes a loss of accuracy for the reading. To limit the loss of 

accuracy during calibration, make the temperature of the pH buffer calibrating solutions and the sample 

solution the same. 

8.2 Use of Standard pH Buffers 

Use standard buffer solutions to calibrate a pH meter before you measure the pH of a sample. They serve as 

reference standards for basis of comparison between measurements. The most common USA standard buffers 

are the pH 4.01 , pH 7.00 and pH 10.01 and the NIST standard buffers are pH 4.01, pH 6.86 and pH 9.18. For 

1-point calibration , use a standard buffer of pH 7.00 or a standard buffer whose pH value is close to that of the 

sample. Use 2-point cal ibration when you know the sample is acidic (low pH) or basic (high pH). For acidic 

samples, use standard buffers of pH 7.00 and pH 4.01. For basic samples, use standards of pH 7.00 and pH 

1 0.01. Use a 3-point calibration when the sample pH is completely unknown. Use all pH 7.00, pH 4.01 and pH 

10.01 calibration solutions. 

8.3 Standard pH Buffers 

The following table shows the various pH values at different temperature of the solution during calib a i ... , 

table also illustrates why a calibration value may be different from the buffer value at 25°C. 

Temperature (

0

C) USA Buffer IS B c 

pH 4.01 pH 7.00 pH 10.01 pH 4.0 p - -- -- = . : 

0 4.01 7.12 10.32 f -. 

- --

5 4.01 7.09 - ~ 1! ' 

10 4.00 ; .cE . ...L. 

15 4.00 

20 .: - r. 

25 .!.. -. I 

: - I ~ I• 

~- I 

. - I - -- - - - II ~: 

- - - - -

- - -

- li :. -- II - -

- - -. - - -

-- -- - .!.. - - - -

.. ~ 6.9 9. ... . __ g 

60 4.10 6.98 9.79 4.10 6.84 8.96 

70 4.12 6.99 9.76 4.12 6.85 8.92 

80 4.16 7.00 9.74 4.16 6.86 8.89 

90 4.20 7.02 9.73 4.20 6.88 8.85 

::. 
Instruction Manual pH 5101 lon 510 

8.4 Specifications 

II ..... c -·· .. ........ ·.... << < .•...... . ) ? ............. ............. ····· . i __ ................ -.... •·· •·••••·•• • i"•· ..••.••..• •.• i···.··· .... 

········· 

···.··•· <; •. •·•..\) pHStO .< ·r ••••· < 

pH Range 0.00 to 14.00 pH ./ ./ 

Resolution 0.01 pH ./ ./ 

Accuracy ± 0.01 pH + 1 count ./ ./ 

. ./ 

lon Concentration Range 0.01 to 1999 ppm 

·i . (± 500mV input) 

0.01 pm (0.01 to 0.99 ppm); 0.1 ppm (1 .0 ... 

Resolution to 199.9 ppm); 1 ppm (200 to 1999 ppm) ./ 

Accuracy ±0.5% Full Scale for mono-valent ions ./ ±1 .0 % Full Scale for di-valent ions 

./ 

./ 

mV Range Yes ± 500mV(Absolute) ±1999mV 

±1999mV( Relative) 

Resolution 0.1 mV (± 199.9 mV), 1 mV beyond ± 200 mV ./ ./ 

Accuracy ± 0.2 mV (± 199.9 mV), ± 2 mV beyond ± 200 ./ ./ mV 

Calibration Offset Up to ±150 mV ./ ./ Adjustment 

Temperature Range 0.0 to 100.0 °C ./ ./ 

Resolution 0.1 °C ./ ./ 

Accuracy ± 0.3 °C ./ ./ 

Temperature Compensation Automatic I Manual (0 to 100 °C) ./ ./ 

No. of pH Calibration Points Up to 3 points with Auto-buffer recognition ./ ./ 

pH Buffer Calibration Options USA: pH 4.01, 7.00, 10.01 ; ./ ./ 

NIST: pH 4.01, 6.86, 9.18 

.. No. of lon Calibration Points Up to 3 points (minimum 2 points) I ./ 

lon Calibration Options 0.1, 1.0, 10.0 or 100.0 ppm ./ 

Min. & Max. Slope during I < 15 mVIdecade to 90 mVIdecade . ./ Calibration ... 

Temperature Calibration Offset in 0.1 °C increments; Offset range: ± 5 °C ./ ./ 

Memory 50 data sets ./ ./ 

Hold Function Yes ./ ./ 

Self-diagnostic Messages Yes ./ ./ 

pH Slope and Offset Display Yes ./ ./ 

Inputs BNC, Phono, Ref. (Half-cell), Ground ./ ./ 

Output Recorder (+1- 2000 mV) ./ ./ 

Power Requirements ACIDC 9V Adapter (110 VACI220 VAG, 50- ./ ./ 60Hz) 

Display Custom Dual LCD (1 x 4 digits, 1 x 3.5 digits, ./ ./ annunicators) 

Meter with electrode holder: 18 x 23 x 6 em I 

Dimensions I Weight 1250 g ./ ./ 

Boxed (meter with electrode holder): 40 x 26 x 9 

em I 1950 g 

26 
Instruction Manual pH 510/ ion 510 

9 WARRANTY 

This bench meter is supplied with a 3-year warranty from manufacturing defects and electrodes for 6 months 

from the date of purchase. 

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. Fisher Science Education 

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 

10 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. Fisher 

Science Education will not be responsible for damage resulting from careless or insufficient packing. A 

restocking charge will be made on all unauthorized returns . 

NOTE: Fisher Science Education reserves the right to make improvements in design, construction , and 

appearance of products without notice. 

27