PCE Instruments PCE-PH 23 User manual

PCE-PH 23 pH Meter

User Manual

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Last change: 14 May 2020

v1.0

English

 
 © PCE Instruments 
 
 
Contents 
1Safety notes........................................................................................... 1 
2Before first use......................................................................................2 
2.1 Inserting / replacing the batteries...................................................................................... 2 
2.2 Soaking the electrode....................................................................................................... 2 
3Device description ................................................................................ 2 
3.1 Meter................................................................................................................................ 2 
3.2 Display............................................................................................................................. 2 
3.3 Operating modes of the meter.......................................................................................... 3 
3.4 Key description................................................................................................................. 3 
4Operation ............................................................................................... 4 
4.1 On / off............................................................................................................................. 4 
4.2 Set date and time............................................................................................................. 4 
4.3 Select buffer solutions...................................................................................................... 4 
4.4 pH value calibration.......................................................................................................... 4 
4.5 Measurement................................................................................................................... 5 
4.6 HOLD mode..................................................................................................................... 5 
4.7 Saving readings ............................................................................................................... 5 
4.8 Viewing and deleting data ................................................................................................ 5 
5Electrode replacement ......................................................................... 5 
6Error messages..................................................................................... 6 
7Specifications........................................................................................6 
8Warranty.................................................................................................7 
9Disposal ................................................................................................. 7 
 
 
 

1 Safety notes

Please read this manual carefully and completely before you use the device for the first time. The

device may only be used by qualified personnel and repaired by PCE Instruments personnel.

Damage or injuries caused by non-observance of the manual are excluded from our liability and

not covered by our warranty.

•The device must only be used as described inthis instruction manual. If used otherwise,

this can cause dangerous situations for the user and damage to the meter.

•The instrument may only be used if the environmental conditions (temperature, relative

humidity, …) are within the ranges stated in the technical specifications. Do not expose

the device to extreme temperatures, direct sunlight, extreme humidity or moisture.

•Do not expose the device to shocks or strong vibrations.

•The case should only be opened by qualified PCE Instruments personnel.

•Never use the instrument when your hands are wet.

•You must not make any technical changes to the device.

•The appliance should only be cleaned with a damp cloth. Use only pH-neutral cleaner,

no abrasives or solvents.

•The device must only be used with accessories from PCE Instruments or equivalent.

•Before each use, inspect the case for visible damage. If any damage is visible, do not

use the device.

•Do not use the instrument in explosive atmospheres.

•The measurement range as stated in the specifications must not be exceeded under

any circumstances.

•Non-observance of the safety notes can cause damage to the device and injuries to

the user.

We do not assume liability for printing errors or any other mistakes in this manual.

We expressly point to our general guarantee terms which can be found in our general terms of

business.

If you have any questions please contact PCE Instruments. The contact details can be found at

the end of this manual.

2 Before first use

2.1 Inserting / replacing the batteries

Open the battery compartment cover and insert new batteries. Observe correct polarity. The unit

can continue to operate for approximately 2 to 3 hours after the low battery indicator "BAT"

appears on the display.

2.2 Soaking the electrode

The electrode must be soaked before first use or after storage. Remove the cover of the pH meter

and soak the electrode in a potassium chloride solution with 3mol/l for 2 hours.

3 Device description

3.1 Meter

1. Battery compartment cover

2. LC display

3. Keypad

4. Electrode holder

5. Electrode and unit for

automatic temperature compensation (ATC)

The electrode cap is not shown.

3.2 Display

1. DATE Month-day-year (MM-DD-YY)

2. HOLD Display for Hold mode

3. MEASURE Display for measuring mode

4. BUF Selected buffer solutions

5. TIME 24 hours-minutes (HH:MM)

6. pH pH reading display

7. °C Temperature reading display

8. Number of calibration point (1P/2P/3P)

or type of calibration

Note: °C or °F is pre-set.

3.3 Operating modes of the meter

1. Measuring mode

in the measuring mode

2. Calibration mode

In calibration mode, the 1-point, 2-point or 3-point calibration is performed.

3. Hold mode

In Hold mode, the measurement is interrupted and the currently measured value is

held on the display.

4. Data retrieval mode

In data retrieval mode, you can display measured values from the memory.

5. Date and time setting mode

The date and time setting mode is used to correct the time and date.

6. Buffer selection mode for the calibration solutions

In this mode, the buffer solution set for the calibration is selected: either

7.00 (pH values 7.00/4.01/10.01) or 6.86 (pH values 6.86/4.00/9.18).

3.4 Key description

Key

Operating mode

Duration of

keystroke

Function

HOLD

Any but HOLD

mode

2 s or more

Meter on/off

Measuring mode

0 s

Holds current reading

Hold mode

0 s

Back to measuring mode

Date and time

setting mode

0 s

Moves cursor to next data entry

CAL

Measuring mode

2 s

Jumps to calibration mode

Measuring mode

10 s or more

Jumps to date and time setting

mode

Calibration mode

0 s

Leaves calibration mode

Date and time

setting mode

2 s

Leaves date and time setting

mode

Data retrieval mode

2 s

Clears memory and returns to

measuring mode

STORE

Measuring mode

2 s

Saves current pH reding along

with date and time

Date and time

setting mode

0 s

Increases current reading

Data retrieval mode

2 s or more

Leaves data retrieval mode

Buffer selection

mode

2 s or more

Leaves buffer selection mode

SCROLL

Measuring mode

2 s

Starts data retrieval mode

Measuring mode

5 s or more

Starts buffer selection mode

Data retrieval mode

0 s

Scrolls through saved data

Date and time

setting mode

0 s

Decreases current reading

Buffer selection

mode

0 s

Selects a new buffer solution

set

4 Operation

4.1 On / off

Press the HOLD key for 2 seconds or longer. The instrument will enter measurement mode.

To switch off the meter, press the HOLD key again for 2 seconds. The instrument will turn off

automatically when no key has been pressed for 10 minutes.

4.2 Set date and time

1. Press the "CAL" key for 10 seconds to start

date and time setting mode

2. Press the "HOLD" key to select the date or time

value

3. Press the "STORE" or "SCROLL" key to

increase or decrease value

4. Press the "CAL" key for 2 seconds

Exit and return to measuring mode

4.3 Select buffer solutions

1. Press "SCROLL" key for 5 seconds to start

buffer selection mode

2. Press "SCROLL" key again to select the buffer

solution set:

7.00 for (7.00/4.01/10.01) or

6.86 for (6.86/4.00/9.18)

3. Press "STORE" for 2 seconds

Exit and return to measuring mode

4.4 pH value calibration

1. Press the "CAL" key for 2...3 seconds to start

calibration mode

2. Immerse the electrode in the 7.00 or 6.86 buffer

solution. "WAIT" is displayed.

3. When the "WAIT" indicator disappears, the

calibration for this value is finished.

4. Press "CAL" to complete the 1-point calibration

5. repeat steps 2 and 3 with pH 4.01/4.00 or

10.01/9.18 for 2-point calibration

6. Press "CAL" to complete the 2-point calibration or

7. repeat step 5 for 3-point calibration

8. Automatic return to measuring mode

Note: Cleanthe electrode with distilled water before eachchange of calibration solution. For

accurate measurement results, it is recommended to perform pH calibration weekly and after

each change of electrode.

4.5 Measurement

In measuring mode, immerse the instrument in the liquid to be tested.

Ensure that the electrode is immersed to a maximum of 2 mm below the electrode holder and that

there are no solids in the water. These could influence the measurement result.

4.6 HOLD mode

1. When the pH reading is stable, press the "HOLD" key to

hold it in the display

2. Press "HOLD" key to continue measurement

Note: In HOLD mode, the meter cannot be turned off.

4.7 Saving readings

1. Press the "STORE" key for 2...3 seconds in HOLD mode

or measuring mode

2. "DATA SAVE" and "Mxx" indication on the display when

data are stored in memory space Mxx

3. The instrument automatically returns to measuring mode.

Note: The instrument can store up to 50 measurements. When all memory spaces are occupied,

the first memory space is overwritten first, then the following ones.

4.8 Viewing and deleting data

1. Press the "SCROLL" key for 2...3 seconds in measuring

mode to call up the last saved measurement

2. Press the "SCROLL" key again to display the previously

saved measurement

3. Press "STORE" for 2 seconds

Exit and return to measuring mode or

4. Press "CAL" key for 2...3 seconds

Clear memory completely and return to measuring mode

5 Electrode replacement

1. Unscrew electrode holder from the instrument

2. Remove old electrode from holder

3. Place new electrode in the holder

4. Place new electrode on the meter so that the holder fits

into the electrode connections

5. Screw electrode holder onto the instrument

6. Soak electrode in 3M KCL for 2 hours

7. Calibrate the meter

6 Error messages

display

Temperature

display

Mode

Possible causes

Any

“OVER“

Measurement

a) a) Temperature not within the range 0 ...

99.9 °C

b) b) No temperature sensor

c) c) Temperature sensor defective

> Change the temperature of the liquid or

> insert new temperature sensor

“OVER“

0 … 99.9°C

Measurement

a) pH value not within the range 0 …14

b) Meter must be re-calibrated

“OVER“

0 … 60°C

pH calibration

Offset value or slope value of the electrode

outside the specified range

> Use new buffer solutions

> Change the electrode

Any

“OVER“

pH calibration

Temperature of buffer solution not 0...60 °C

> Change temperature

7 Specifications

Measuring range pH measurement

0.00 ... 14.00 pH

Resolution pH measurement

0.01 pH

Measuring accuracy pH measurement

± 0.02 pH ± 1 digit

Buffer detection pH measurement

pH 7.00, 4.01, 10.01 or pH 6.86, 4.00,

9.18

Temperature compensation pH measurement

Automatically 0.0 ... 99.9°C / 32 ... 211.8°F

Buffer detection Temperature measuring

range

0.0 ... 60°C / 32 ... 140°F

Offset detection pH electrode

± 90 mV at pH 7.00

± 98.3 mV / -81.7 mV at pH 6.86

Slope pH electrode

± 30% at pH 4.00, 4.01, 9.18, and 10.01

input resistance

> 1012 Ω

Technical Specification for Digital pH Meter PCE-PH 23: Temperature measurement

Measuring range temperature

0.0 ... 99.9°C / 32 ... 211.8°F

Resolution temperature

0.1°C / 0.18°F

Measuring accuracy temperature

± 0.3°C / 0.5°F

Temperature sensor

Thermistor, 10 kΩ at 25°C

Temperature unit

°C°F, default

General technical specification for the Digital pH Meter PCE-PH 23

Power supply

4 x LR44

Lifespan batteries

200 hours

Operating temperature

0.0 ... 50.0°C / 32 ... 122°F

Display

98 x 64 pixels, graphic LCD

Casing

ABS, IP67

Weight

107 g / < 1 lb

8 Warranty

You can read our warranty terms in our General Business Terms which you can find here:

https://www.pce-instruments.com/english/terms.

9 Disposal

For the disposal of batteries in the EU, the 2006/66/EC directive of the European Parliament

applies. Due to the contained pollutants, batteries must not be disposed of as household waste.

They must be given to collection points designed for that purpose.

In order to comply with the EU directive 2012/19/EU we take our devices back. We either re-use

them or give them to a recycling company which disposes of the devices in line with law.

For countries outside the EU, batteries and devices should be disposed of in accordance with

your local waste regulations.

If you have any questions, please contact PCE Instruments.

PCE Instruments contact information

Germany France Spain

PCE Deutschland GmbH PCE Instruments France EURL PCE Ibérica S.L.

Im Langel 4 23, rue de Strasbourg Calle Mayor, 53

D-59872 Meschede 67250 Soultz-Sous-Forets 02500 Tobarra (Albacete)

Deutschland France España

Tel.: +49 (0) 2903 976 99 0 Téléphone: +33 (0) 972 3537 17 Tel. : +34 967 543 548

Fax: +49 (0) 2903 976 99 29 Numéro de fax: +33 (0) 972 3537 18 Fax: +34 967 543 542

[email protected] [email protected] [email protected]

www.pce-instruments.com/deutsch www.pce-instruments.com/french www.pce-instruments.com/espanol

Germany United Kingdom Italy

PCE Produktions- und PCE Instruments UK Ltd PCE Italia s.r.l.

Entwicklungsgesellschaft mbH Unit 11 Southpoint Business Park Via Pesciatina 878 / B-Interno 6

Im Langel 26 Ensign Way, Southampton 55010 Loc. Gragnano

D-59872 Meschede Hampshire Capannori (Lucca)

Deutschland United Kingdom, SO31 4RF Italia

Tel.: +49 (0) 2903 976 99 471 Tel: +44 (0) 2380 98703 0 Telefono: +39 0583 975 114

Fax: +49 (0) 2903 976 99 9971 Fax: +44 (0) 2380 98703 9 Fax: +39 0583 974 824

[email protected] [email protected] [email protected]

www.pce-instruments.com/deutsch www.pce-instruments.com/english www.pce-instruments.com/italiano

The Netherlands China Hong Kong

PCE Brookhuis B.V. PCE (Beijing) Technology Co., Limited PCE Instruments HK Ltd.

Institutenweg 15 1519 Room, 6 Building Unit J, 21/F., COS Centre

7521 PH Enschede Zhong Ang Times Plaza 56 Tsun Yip Street

Nederland No. 9 Mentougou Road, Tou Gou District Kwun Tong

Telefoon: +31 (0)53 737 01 92 102300 Beijing, China Kowloon, Hong Kong

[email protected] Tel: +86 (10) 8893 9660 Tel: +852-301-84912

www.pce-instruments.com/dutch [email protected] [email protected]

www.pce-instruments.cn www.pce-instruments.cn

United States of America Turkey

PCE Americas Inc. PCE Teknik Cihazları Ltd.Şti.

711 Commerce Way suite 8 Halkalı Merkez Mah.

Jupiter / Palm Beach Pehlivan Sok. No.6/C

33458 FL 34303 Küçükçekmece - İstanbul

USA Türkiye

Tel: +1 (561) 320-9162 Tel: 0212 471 11 47

Fax: +1 (561) 320-9176 Faks: 0212 705 53 93

[email protected] [email protected]

www.pce-instruments.com/us www.pce-instruments.com/turkish

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