OHAUS ST5000-F, ST5000-B User manual

STARTER 5000

Bench pH Meter
Instruction Manual

STARTER 5000

Medidor de pH de banco

Manual de instrucciones

STARTER 5000

Manuel d’instructions

PH-mètre de laboratoire

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TABLE OF CONTENTS

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

1

1.1 Definition of Signal Warnings and Symbols ................................. 1

1.2 Safety Precautions ........................................................................... 2

2 INST ALLATION ................................................................. 3

2.1 Package contents ............................................................................. 3

2.2 Installing the stand-alone electrode holder ................................... 4

2.3 Installing the power adapter ........................................................... 4

2.4 Connect the pH electrodes ............................................................. 5

3 DISPLAY A ND ICONS ....................................................... 5

3.1 Turn on the meter ............................................................................. 5

3.2 Turn off the meter............................................................................. 6

3.3 Icons .................................................................................................. 6

3.4 Menu directory ................................................................................. 9

4 CALIBRATION, MEASUREMENT AND PRINT .............. 10

4.1 Calibration ...................................................................................... 10

 Buffer group ..................................................................................... 10

 Performing calibration ....................................................................... 11

4.2 Sample measurement .................................................................... 12

 pH measurement ............................................................................. 12

 mV and Rel.mV measurement ......................................................... 12

4.3 Temperature measurement ........................................................... 12

4.4 Printing ............................................................................................ 13

5 SETUP ............................................................................. 14

5.1 System Setting ............................................................................... 14

 System setting ►Save Mode .......................................................... 14

 System Setting ►Output ................................................................. 14

 System Setting ► Restore Factory Setup ....................................... 14

 System Setting ► Service Password .............................................. 14

5.2 Measurement Setting ..................................................................... 15

 Measurement Setting ►Endpoint Mode .......................................... 15

 Measurement Setting ►GLP Measurement Mode .......................... 15

 Measurement Setting ►Continuous Measure ................................. 15

5.3 Calibration Setting ......................................................................... 16

 Calibration Setting ►Buffer Group .................................................. 16

 Calibration Setting ►Calibration Reminder ..................................... 16

5.4 Data Log .......................................................................................... 16

6 MAINTENANCE ............................................................... 17

6.1 Error message ................................................................................ 17

6.2 Meter maintenance ........................................................................ 17

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6.3 Electrode maintenance .................................................................. 17

6.4 Information ..................................................................................... 17

7 TECHNICAL DATA .......................................................... 18

7.1 Specifications ................................................................................. 18

8 COMPLIANCE ................................................................. 19

9 BUFFER GROUPS .......................................................... 20

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STARTER 5000 Bench pH Meter EN-1

1 INTRODUCTION

Thank you for choosing this OHAUS product.
Please read the manual completely before using the STARTER 5000 bench pH meter to avoid
incorrect operation.

STARTER 5000 is a 0.001pH bench meter with a color touch-screen LCD. It’s a new generation of
intuitive and easy-to-use bench meters for reliable measurements.
A few of the many existing features are:

x Bi-lingual graphical user interface
x Auto, manual time endpoint which can assist users to freeze the stable reading value to

meet different customer requirements

x 8 buffer groups (US, EU, NIST and JJG) with 1 self-defined buffer
x IP54 water and dust protection

1.1 Definition of Signal Warnings and Symbols

Safety notes are marked with signal words and warning symbols. These show safety issues and
warnings. Ignoring the safety notes may lead to personal injury, damage to the instrument,
malfunctions and false results.

Signal Words

WARNING For a hazardous situation with medium risk, possibly resulting in

injuries or death if not avoided.

CAUTION For a hazardous situation with low risk, resulting in damage to the

device or the property or in loss of data, or injuries if not avoided.

Attention For important information about the product

Note For useful information about the product

Warning Symbols

General Hazard Electrical Shock Hazard

Explosion Hazard Corrosive Hazard

Alternating Current Direct Current

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EN-2 STARTER 5000 Bench pH Meter

1.2 Safety Precautions

CAUTION Read all safety warnings before installing, making connections, or

servicing this equipment. Failure to comply with these warnings could result in

x Verify that the AC adapter's input voltage range and the plug type are compatible with the

local AC power supply.

x Make sure that the power cord does not pose a potential obstacle or tripping hazard.
x Use the equipment only in dry locations.
x Dry off any liquid spills immediately. The instrument is not watertight.
x Use only approved accessories and peripherals.
x Operate the equipment only under ambient conditions specified in these instructions.
x Disconnect the equipment from the power supply when cleaning.
x Do not operate the equipment in hazardous or unstable environments.
x Service should only be performed by authorized personnel.

x I f the equipment is used in a manner not specified by the manufacturer, the protection

provided by the equipment may be impaired.

personal injury and/or property damage. Retain all instructions for future reference.

WARNING Do not use this instrument in an environment subject to explosion
hazards. The housing of the instrument is not gas tight (explosion hazard due to
spark formation, corrosion caused by the ingress of gases).

CAUTION When using chemicals and solvent s, comply with the instructions of the
producer and the general lab safety rules.

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ST ARTER 5000 Bench pH Meter EN-3

Model

Description

P/N

ST350

3-in-1 glass refillable pH Electrode

30129354

ST310

3-in-1 plastic refillable pH Electrode

83033965

ST210

2-in-1 plastic refillable pH Electrode

83033966

ST320

3-in-1 plastic gel pH Electrode(no need to fill)

83033967

ST260

2-in 1 glass double salt bridge pH Electrode

30129357

ST230

2-in-1 glass muddy sample pH Electrode

83033968

STSURF

2-in-1 flat surface pH Electrode

30129470

STMICRO5

2-in-1 glass micro sample pH Electrode

30087566

STMICRO8

2-in-1 glass micro sample pH Electrode

30087569

STTEMP30

Temperature Electrode

83033970

STORP1

Gel plastic ORP electrode

30038555

STORP2

Refillable glass ORP electrode

30038553

ST5000-B

Units

ST5000 meter

1

ST5000 In use cover

1

Stand-alone electrode holder

1 set

4GB USB flash drive

1

Buffer powder set (4.01; 7.00; 10.00)

1 set

Power supply

1 set

ST350 3-in-1 glass refillable pH electrode

1

Buffer powder set (4.01; 7.00; 10.0)

83033971

Buffer pH1.68 250ml

30100424

Buffer pH4.01 250ml

30100425

Buffer pH7.00 250ml

30100427

Buffer pH10.01 250ml

30100429

Buffer pH12.45 250ml

30100440

pH electrode Reference Electrolyte

30059255

pH electrode protection solution

30059256

Electrode holder stand alone

30058733

ST5000 In use cover

30129897

SP Cable Adapter RS232 F-M SF40A (for ST5000)

30059316

2 INSTALLATION

Carefully unpack the box.

2.1 Package contents

The model ST5000-B (basic package) has the following items:

In addition to ST5000-B content, the ST5000-F package also includes the following:

Each pH buffer powder should be dissolved in 250ml pure water or deionized water in a
volumetric flask. You also can order the bottled buffer solution from Ohaus.
More electrodes, solutions, accessories and spare parts, please contact Ohaus for more details.

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EN-4 STARTER 5000 Bench pH Meter

2.2 Installing the stand-alone electrode holder

Install the electrode arm on the base:

After adjusting the tension knob to some extent, t he upper arm can be move up and down.
When the pH electrode is placed on the arm and calibration or measurement is being
performed, the storage bottle of pH electrode can be placed into the base hole for easy
storage:

2.3 Installing the power adapter

Insert the adapter plug into the power adapter slot.

CAUTION Only use an adapter plug that is compatible with the mains power
receptacle. Make sure that the adapter plug is fully seated in the power adapter slot
before plugging it into the mains power receptacle.

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STARTER 5000 Bench pH Meter EN-5

2.4 Connect the pH electrodes

There are 2 sockets for the electrode. “pH” socket (BNC); “TEMP.” Socket (Cinch).
For ST350 3-in-1 electrode, connect both the BNC and Cinch socket. For 2 -in-1 pH electrodes
(e.g. ST230), only connect the BNC.

3 DISPLAY AND ICONS

3.1 Turn on the meter

STARTER 5000 is a color touch screen 0.001pH bench meter. It does not have any buttons.
After connecting with power, the meter will turn on, if meter in screen protection, you can tap the
screen to turn on the screen.
Note: If customer did not operate the meter for more than 6 hours, the meter will completely shut
off automatically. You cannot turn on the meter by tap ping the screen any more. You need to
reconnect power to turn on the meter.



Select the language and then press to enter the main interface.
Main Interface

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EN-6 STARTER 5000 Bench pH Meter



User ID



Sample ID

Information

Date

Time

pH measurement mode. Shift between mV and Rel.mV mode or

Signal icon, when it

is blinking that means the meter is receiving signal (in

measurement or calibration).




Endpoint icons, auto
When in manual-endpoint, if the signal is stable, the meter will show the stable signal

icon. Tap the stop icon

to reach manual endpoint.

Signal stable icon

Tempera

3.2 Turn off the meter

To turn off the meter, please tap the turn-off button in the top-left of main interface to enter

the turn -off interface. Then tap
main interface again.

Turn-off interface



3.3 Icons



icon

to turn-off the meter or tap to go back to



-endpoint, manual-endpoint and time-endpoint.

ture icon.

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ST ARTER 5000 Bench pH Meter EN-7



Endpoint:"

Tap this area to enter the interface to set the endpoint mode. Available
modes are Auto, Manual and Time end

is

displayed.



Sensor ID:"



Tap this area to enter the interface to select, set or change the sensor ID.
The current sensor ID is displayed.



Cond:"

Tap this area to
sensor performance icon (judged by calibration data) is displayed.

and offset: ± (0
Electrode

or offset: ± (

) mV
Electrode condition is
acceptable

%

or offset: ± (
Electrode

not

good or needs cleaning

Calibration reminder icon
calibration from last calibration. When the time is reached, this icon will be displayed
and blink to remind that it is time to perform a calibration.

“Buffers:”

This area displays the current buffer group, tap this area to enter the interface to
select the buffer group.



Start icon. Tap this icon and the meter wil

icon will blink. The start icon area will show the stop icon 

Calibration icon. Tap this icon to start calibration.

Save icon. After saving the current measurement result (endpoint reached), this
icon color will change

, indicating that the reading has

already been saved and cannot be saved twice.

Output icon. Output

If “Shut off connection” is chosen in

icon

therwise the output icon will be displayed in the

same position.

Information, measure and calibrate tap area
The information area is also the shortcut to enter the setting interface:

point. The current endpoint mode

Sensor

There are 3 sensor condition icons:

Slope: more than 95%

-15) mV

condition is good



enter the sensor calibration data interface. The current

Slope: 90-95%

15-35

. Set the time you want the meter to alert you to do

l begin measurement, the signal

Slope: less than 90

35-60) mV

condition is

from black to light gray

data to external device such as a printer.

System Setting ►Output, the save

will be displayed .O

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EN-8 STARTER 5000 Bench pH Meter

Return to main interface

Return to previous menu

Enter, confirm or apply current setup, finish setting

Edit

Page up

Page down

Delete

Increase (light)

Decrease (light)

Graph display (for the measurement or calibration data)

Save

Output to external device (USB flash drive, printer)

Full keyboard

Next calibration point

Current Calibration point again

End of calibration

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ST ARTER 5000 Bench pH Meter EN-9

System
Setting

Date

Time

Save Mode

Output

Screen Brightness

Baud Rate

Screen Protection

Restore Factory Setup

Instrument Information

Service Passwo r d

Measurem
Setting

Resolution

MTC Temp. Input

pH/mV/Rel.mV Mode

Continuous Measure

Endpoint Mode

ID setting

GLP Measurement Mode

Calibration
Setting

Buffer Group

Calibration Reminder

Data
Measurement Data

Calibration Data

3.4 Menu directory

The menus of first and secondary directory for STARTER 5000:

ent

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EN-10 STARTER 5000 Bench pH Meter

4 CALIBRATION, MEASUREMENT AND PRINT

The meter display will turn off automatically according to the time set in the menu System Setting

►Screen Protection ►LCD Auto-off. To turn on the screen again, tap the screen.(See 3.1)

A complete pH measurement process should follow the procedure:

a) Rinse the pH electrode and connect to meter
b) Prepare the buffer and calibrate the pH electrode
c) Prepare the sample
d) Conduct pH measurement of the sample
e) Record measurement data

f) Rinse the pH electrode and store
Prepare the pH electrode: the pH electrode should be rinsed with pure water before and after
usage. Check if the electrode is physically damaged. (Be careful with the glass bulb)

The pH electrode should be stored in the storage bottle. After the pH electrode has been put into
the sample or buffer solution, stir several seconds then wait 30 to 60 seconds for the signal to be
stable, and then press the button to operate (Calibration or measurement).

WARNING Do not operate the equipment in hazardous environments. The equipment
is not explosion protected.

CAUTION When using chemicals and solvents, comply with the instructions of the
chemical producer and the general lab safety rules.

4.1 Calibration

 Buffer group

STARTER 5000 can perform 1-5 point calibrations for predefined buffer groups. For self-defined
buffer group, it can do 1-9 point calibration.

Before calibration, make sure the current buffer group is the group wanted.
When using a new pH electrode, a calibration should be performed before any m easurement. If a
pH electrode is not used for a few days, a calibration should be performed before next usage.

Calibration is to display the right pH value when the meter receive the mV value signal from the
pH electrode.

Slope: the linear coefficient between mV and pH acco rding to theoretical value (e.g. -

59.16mV/pH @ 25°C means 100% slope);

Offset: the mV value when the pH value is 7.00. (Theoretical value is 0 mV)

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ST ARTER 5000 Bench pH Meter EN-11

5°C

1.67

4.01

7.09

10.25

10°C

1.67

4.00

7.06

10.18

15°C

1.67

4.00

7.04

10.12

20°C

1.68

4.00

7.02

10.06

25°C

1.68

4.01

7.00

10.01

30°C

1.68

4.01

6.99

9.97

35°C

1.69

4.02

6.98

9.93

40°C

1.69

4.03

6.97

9.89

45°C

1.70

4.05

6.97

9.86

50°C

1.71

4.06

6.96

9.83

STARTER 5000 will give an electrode condition icon to show the performance of the pH electrode
according to the calibration data. Normally, if we get sad face icon after a proper calibration, you
may need to replace the pH electrode with a new one.

STARTER 5000 automatically corrects for the t emperature dependence of the buffer pH values.
E.g. for US standard buffer group "1.68, 4.01, 7.00, 10.01" reference the following table:

For example, with calibration buffer 10.01 at 15°C, the calibration result should be 10.12 pH.

 Performing calibration

After rinsing the pH electrode, put the electrode into the first buffer, stir for 10s then press to
start the calibration. When in calibration, the signal icon blinks. When the endpoint has been

reached,
are now 3 options:

Quit the calibration and go back to main interface

Finish current point calibration, go to calibration result interface

Do the next point calibration

Note: During calibrating process, the ST5000 is always in Auto Endpoint Mode.
Note: The use of 3-in-1 pH electrode which include the temperature sensor or a separate

temperature electrode is recommended. When using the MTC mode, enter the correct
temperature value and keep all buffer and sample solutions at the set temperature.

appears while disappears and current point calibration is finished, There

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EN-12 STARTER 5000 Bench pH Meter

4.2 Sample measurement

 pH measurement

Be sure the electrode has been calibrated before measurement. After rinsing,

 Place the pH electrode in the sample.

 Press

measurement is finished.

Note: If the signal is not stable all the time, it is recommended to use manual endpoint mode to
avoid bad repeatability.

to start the pH measurement, when the endpoint has been reached, the current

 mV and Rel.mV measurement

Press to shift to or mode; follow the same procedure as for pH
measurement to perform mV or Rel.mV measurement.
If the meter is connected t o an ORP electrode, the mV result is the value of Oxidation-Reduction
Potential value; also called Redox value.

4.3 Temperature measurement

For better accuracy, we recommend to use either a built-in or a separate temperature electrode.

 If a temperature electrode is used, ATC and the sample temperature are displayed.
 If the meter does not detect a temperature electrode, it automatically switches to the manual

temperature compensation mode and MTC appears. MTC temperature should be set.

Note: STARTER 5000 accepts NTC 30 kΩ temperature sensor. For ATC (Auto Temperature

Compensation) or MTC (Manual Temperature Compensation), the Temperature Compensation
only corrects for the change in the output of the electrode, not for the change in the actual solution.
That means the meter corrects the signal (mV) from the pH electrodes t o get a more accurate pH
value according to the real temperature.

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ST ARTER 5000 Bench pH Meter EN-13

4.4 Printing

STARTER 5000 can print the measurement or calibration data through RS232. After the printer
(e.g. OHAUS SF-40A) is connected to the meter properly, make the following settings(See 5.1):

please order the connect cable for ST5000 (P/N 30059316) to connect SF40A and ST5000.

System Setting ► Output , select Printer
System Setting ► Baud Rate, select 9600.

The format for the print-out measurement is:

Date Time User SampleID

6-13-2015 14:20:22 User01 Sample02

SensorID Endpoint mode MTC/ATC

Sensor02 Manual ATC

Temperature Result

25.3°C 6.999pH
The format for the print-out calibration data is:
Calibration Data

SensorID Serial Number
Sensor02 14060012
Cal. Date Cal. Time ATC/MTC
01-01-2015 14:20:33 ATC
Buffers mV Offset Slope

4.00pH 176.94mV

7.00pH 0.05mV 0.05mV 98.22%
When performing continuous measurement, the format for the print-out calibration data is:
Timing Measure Record

SensorID Serial Number

Sensor03 14060012

Date Time Temperature Measurement

01-01-2015 14:20:25 23.5°C 6.998pH

Date Time Temperature Measurement

01-01-2015 14:20:30 23.5°C 6.999pH

Date Time Temperature Measurement

01-01-2015 14:20:35 23.5°C 7.000pH

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EN-14 STARTER 5000 Bench pH Meter

5 SETUP

5.1 System Setting

System setting is used to set meter parameters, the meter information could also be f ound in it.
Please see section 3.4 for reference.

 System setting ►Save Mode

Save mode has 2 options, one is Auto Save Endpoint Reading, another is Manual Save Endpoint
Reading. Auto Save Endpoint Reading means that when the measurement reac hes the endpoint
(auto, manual or time endpoint), the meter will save the endpoint reading automatically.

The Save icon
saved only once.

will change from black to light grey

; An endpoint reading can be

 System Setting ►Output

When selecting shut off connection, the main interface will display the save icon , or

display the Output Icon



 System Setting ► Restore Factor y Setup

Restoring the factory setup includes the following:

1. Shut off GLP mode

2. Shut off A uto Save m ode

3. Shut off co ntinuous measure

4. Shut off (output) connection

5. Shut off calibration Reminder

6. The resolution is: 0.001pH, 0.01mV

7. Measurement mode: pH

8. Self buffer group will be deleted

9. Baud rate: 9600

10. Brightness of screen: 70%

11. Shut off Screen Protection

12. MTC: 25°C

13. Endpoint: Auto

14. Time endpoint: 10 Second

15. Delete all the calibration data

 System Setting ► Service Pass word

Not used.

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ST ARTER 5000 Bench pH Meter EN-15

5.2 Measurement Setting

 Measurement Setting ►E ndpoint Mode

Auto Endpoint
In this mode, the meter will reach the endpoint and lock the reading according to the following
stability criteria automatically:

0.1pH resolution: the signal of the sensor input may not change by more than 0.3mV in 6
seconds.

0.01pH resolution: the signal of the sensor input may not change by more than 0.1mV in 6
seconds.

0.001pH resolution: the signal of the sensor input may not change by more than 0.03mV in 6
seconds.

Time Endpoint
In this mode, the user needs to input the endpoint time, e.g. 15 seconds. This means after starting
the measurement for 15s, the meter will reach the endpoint.

Manual Endpoint
In this mode, the user needs to decide when the signal reading is stable, then press the stop icon

to reach manual endpoint.

 Measurement Setting ►GLP Measurement Mode

GLP mode requires each measurement to have the User ID and Sam ple ID. If there is no sample
ID or user ID, the meter will show the interface to let user input the required data.

 Measurement Setting ►Co ntinuous Measure

During continuous measure, the user needs to input the time interval to get each reading result.
Below is the Graph of continuous measure.

The Y axis is pH value. The x axis is the Number of measurement result.

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EN-16 STARTER 5000 Bench pH Meter

5.3 Calibration Setting

 Calibration Setting ►Buffer Group

Before calibration, please make sure the current buffer group is correct for your buffer solutions.
User can select from the 8 predefined buffer groups.
User can also set self-defined buffer groups. The adjacent 2 calibration point difference should be
larger than 0.99pH.

 Calibration Setting ►Calibration Reminder

Enter this setting to set the time, from the last calibration, after how many hours the meter should

remind to perform calibration again. The meter will show the calibration reminder icon
blink, to remind user to perform calibration.

and

5.4 Data Log

Tap Data to get into the Data log interface, including measurement data and calibration data.
You can delete all the measurement data here. The only way to delete calibration data is to
restore factory setup.
The data can be output to a USB Flash Drive (≤4GB).

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ST ARTER 5000 Bench pH Meter EN-17

6 MAINTENANCE

6.1 Error message

When the input value/measurement result is out of range or calibration data is not good enough,
the meter will display error information.
If the error cannot be solved by the error message displayed, please contact Ohaus sales
representative for further assistance.

6.2 Meter maintenance

The STARTER 5000 series instruments do not require any maintenance other than occasional
wiping with a damp cloth.
Attention: Follow these safety precautions when cleaning the instrument

x Disconnect the instrument from the power supply
x Do not open the instrument
x Do not allow liquids to enter the instrument

Attention: The housing is made of acrylonitrile butadiene styrene (ABS). This material is attacked
by some organic solvents, such as toluene, xylene and methyl ethyl ketone (MEK). Any spillage
should be immediately wiped off.

6.3 Electrode maintenance

Make sure the electrode is filled with electrolyte solution. Always store the electrode according to
the electrode instruction manual and do not allow it to dry out.
If the electrode response becomes sluggish or the slope is not good enough, try the following:

o Soak the electrode in 0.1M HCl for more than 8 hours.

o For fat or oil contaminant, degrease the membrane with cotton wool soaked in either

acetone or a soap solution.
After electrode treatment, a new calibration should be performed. If the electrode slope is still not
good, the electrode might need to be replaced.

6.4 Information

Tap the Information icon to enter the information interface. Here the user can input related
information by tapping the area with "

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" in the bottom left such as sensor purchase date, etc.

EN-18 STARTER 5000 Bench pH Meter

Model

SSTARTER 5000

Measuring range

-2.000…20.000 pH

–

-30

Resolution

0.1/0.01/0.001 pH
1

0.1

Error limits

± 0.002 pH
±
± 0.1

Calibration

1-9 points
8 predefined buffer group+1 self-defined buffer group

Memory

1000 measurements
10*10 calibration data

Power supply

100-240V~0.3A input, 9V 1.12A output AC Adapter

Size/weight

Approximately 210 x 170 x 80 mm / 0.65 kg

Ship dimension/weight

Approximately 372 x 310 x 185 mm / 2.30 kg
Display

Touch screen liquid crystal with backlight

Input

BNC, impedance > 3 x 10e+12 Ω
Cinch, NTC 30 kΩ

Temperature-compensation

ATC & MTC

Housing

ABS

7 TECHNICAL DATA

7.1 Specifications

The technical data is valid under the following ambient conditions:

x Indoor use only
x Altitude: Up to 2000 m
x Specified Temperature range: 5°C to 40°C
x Humidity: maximum relative humidity 80 % for temperatures up t o 30°C decreasing linearly to

50% relative humidity at 40°C

x Mains supply voltage fluctuations: up to ±10% of the nominal voltage
x Installation category II
x Pollution degree: 2
x Operability is assured at ambient temperatures between 5°C to 40°C

2000.00…2000.00 mV
°C …130°C

/0.1/0.01 mV

°C

0.03% FS mV
°C

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STARTER 5000 Bench pH Meter EN-19

8 COMPLIANCE

This product conforms to the EMC Directive 2004/108/EC and the Low Voltage
Directive 2006/95/EC.

In conformance with the European Directive 2002/96/EC on Waste Electrical
and Electronic Equipment (WEEE) this device may not be disposed of in
domestic waste. This also applies to countries outside the EU, per their specific
requirements. The Batteries Directive 2006/66/EC introduces new
requirements from September 2008 on removability of batteries from waste
equipment in EU member States. To comply with this Directive, this device has
been designed for safe removal of the batteries at end-of-life by a waste
treatment facility. Please dispose of this product in accordance with local
regulations at the collecting point specified for electrical and electronic
equipment. If you have any questions, please contact the responsible authority
or the distributor from which you purchased this device. Should this device be
passed on to other parties (for private or professional use), the content of this
regulation must also be related.Thank you for your contribution to
environmental protection.

FCC Note: This equipment has been tested and found to comply with the limits for a Class
A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.

Industry Canada Note

This Class A digital apparatus complies with Canadian ICES-001

ISO 9001 Registration

In 1994, OHAUS Corporation, USA, was awarded a certificate of registration to ISO 9001 by
Bureau Veritus Quality International (BVQI), confirming that the OHAUS quality
management system is compliant with the ISO 9001 standards requirements. On June 21,
2012, OHAUS Corporation, USA, was re-registered to the ISO 9001:2008 standard.

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EN-20 STARTER 5000 Bench pH Meter

e

9 BUFFER GROUPS

STARTER 5000 automatically correct for the temperature dependence of the buffer group pH value
given in the following tables. Please choose the buffer group you want before calibration.

JJG119 ((Ref. 25°C, 0.01pH)
Temp °C 1.68 4.00 6.86 9.18 12.46

5 1.67 4.00 6.95 9.39 13.21
10 1.67 4.00 6.92 9.33 13.01
15 1.67 4.00 6.90 9.28 12.82
20 1.68 4.00 6.88 9.23 12.64

25 1.68 4.00 6.86 9.18 12.46

30 1.68 4.01 6.85 9.14 12.29
35 1.69 4.02 6.84 9.11 12.13
40 1.69 4.03 6.84 9.07 11.98
45 1.70 4.04 6.83 9.04 11.83
50 1.71 4.06 6.83 9.02 11.70

US standard (Ref. 25°C)
Temp °C 1.68 4.01 7.00 10.01

5 1.67 4.01 7.09 10.25
10 1.67 4.00 7.06 10.18
15 1.67 4.00 7.04 10.12
20 1.68 4.00 7.02 10.06

25 1.68 4.01 7.00 10.01

30 1.68 4.01 6.99 9.97
35 1.69 4.02 6.98 9.93
40 1.69 4.03 6.97 9.89
45 1.70 4.05 6.97 9.86
50 1.71 4.06 6.96 9.83

Europe standard (Ref. 25°C)
Tempe

C 2.00 4.01 7.00 9.21 11.00

5 2.02 4.01 7.09 9.45 11.72
10 2.01 4.00 7.06 9.38 11.54
15 2.00 4.00 7.04 9.32 11.36
20 2.00 4.00 7.02 9.26 11.18

25 2.00 4.01 7.00 9.21 11.00

30 1.99 4.01 6.99 9.16 10.82
35 1.99 4.02 6.98 9.11 10.64
40 1.98 4.03 6.97 9.06 10.46
45 1.98 4.04 6.97 9.03 10.28
50 1.98 4.06 6.97 8.99 10.10

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STARTER 5000 Bench pH Meter EN-21

MERCK (Ref. 20°C)
Temp °C 2.00 4.00 7.00 9.00 12.00

5 2.01 4.04 7.07 9.16 12.41
10 2.01 4.02 7.05 9.11 12.26
15 2.00 4.01 7.02 9.05 12.10

20 2.00 4.00 7.00 9.00 12.00

25 2.00 4.01 6.98 8.95 11.88
30 2.00 4.01 6.98 8.91 11.72
35 2.00 4.01 6.96 8.88 11.67
40 2.00 4.01 6.95 8.85 11.54
45 2.00 4.01 6.95 8.82 11.44
50 2.00 4.00 6.95 8.79 11.33

DIN (19267) (Ref. 25°C)
Temp °C 1.09 4.65 6.79 9.23 12.75

5 1.08 4.67 6.87 9.43 13.63
10 1.09 4.66 6.84 9.37 13.37
15 1.09 4.66 6.82 9.32 13.16
20 1.09 4.65 6.80 9.27 12.96
25 1.09 4.65 6.79 9.23 12.75
30 1.10 4.65 6.78 9.18 12.61
35 1.10 4.65 6.77 9.13 12.45
40 1.10 4.66 6.76 9.09 12.29
45 1.10 4.67 6.76 9.04 12.09
50 1.11 4.68 6.76 9.00 11.98

JIS Z 8802 (Ref. 25°C)
Temp °C 1.679 4.008 6.865 9.180

5 1.668 3.999 6.951 9.395
10 1.670 3.998 6.923 9.332
15 1.672 3.999 6.900 9.276
20 1.675 4.002 6.881 9.225

25 1.679 4.008 6.865 9.180

30 1.683 4.015 6.853 9.139
35 1.688 4.024 6.844 9.102
40 1.694 4.035 6.838 9.068
45 1.700 4.047 6.834 9.038
50 1.707 4.060 6.833 9.011

DIN(19266) / NIST (Ref. 25°C)
Temp °C 1.680 4.008 6.865 9.183 12.454

5 1.668 4.004 6.950 9.392 13.207
10 1. 670 4.001 6.922 9.331 13.003
15 1. 672 4.001 6.900 9.277 12.810
20 1. 676 4.003 6.880 9.228 12.627

25 1. 680 4.008 6.865 9.183 12.454

30 1. 685 4.015 6.853 9.144 12.289
35 1. 691 4.026 6.845 9.110 12.133
40 1. 697 4.036 6.837 9.076 11.984
45 1. 704 4.049 6.834 9.046 11.841
50 1. 712 4.064 6.833 9.018 11.705

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EN-22 STARTER 5000 Bench pH Meter

JJG119 (Ref. 25°C, 0.001pH)
Temp °C 1.680 4.003 6.864 9.182 12460

5 1.669 3.999 6.949 9.391 13.210
10 1.671 3.996 6.921 9.330 13.011
15 1.673 3.996 6.898 9.276 12.820
20 1. 676 3.998 6.879 9.226 12.637

25 1. 680 4.003 6.864 9.182 12.460

30 1. 684 4.010 6.852 9.142 12.292
35 1.688 4.019 6.844 9.105 12.130
40 1. 694 4.029 6.838 9.072 11.975
45 1.700 4.042 6.834 9.042 11.828
50 1. 706 4.055 6.833 9.015 11.697

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ST ARTER 5000 Bench pH Meter EN-23

LIMITED WARRANTY

Ohaus products are warranted against defects in materials and workmanship from the date of
delivery through the duration of the warranty period. During the warrant y period Ohaus will repair,
or, at its option, replace any component(s) that proves to be defective at no charge, provided that
the product is returned, freight prepaid, to Ohaus.
This warranty does not apply if the product has been damaged by accident or misuse, exposed to
radioactive or corrosive materials, has foreign material penetrating to the inside of the product, or
as a result of service or modification by other than Ohaus. In lieu of a properly returned warranty
registration card, the warranty period shall begin on the dat e of shipment t o the authorized dealer.
No other express or implied warranty is given by Ohaus Corporation. Ohaus Corporation shall not
be liable for any consequential damages.
As warranty legislation differs from state to state and country to country, please contact Ohaus or
your local Ohaus dealer for further details.

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