PCE Health and Fitness PCE-PH 28L User manual

PCE-PH 28L Pocket pH Meter
Instruction Manual

1
Thank you for selecting the PCE-PH 28L pocket pH meter. This manual provides a step-by-step guide to help you operate the meter, please
carefully read the following instructions before use.
Installing the Batteries
•Twist the electrode collar counter clockwise, pull the electrode away from the meter.
•Insert two AAA batteries into the battery compartment, note polarity.
•Align the slot on electrode, gently push the electrode into the meter.
•Twist the electrode collar clockwise until it is tight.
Display
PCE-PH 28L pocket pH meter is equipped with an easy-to-read LCD display that used to show the measured values and mode icons. The
following table describes the function of each icon.
INDEX:
ICON
DESCRIPTION
MEAS
Indicates the meter is in the measurement mode.
CAL
Indicates the meter is in the calibration mode.
SETUP
Indicates the meter is in the setting mode.
HOLD
Indicates the measuring value has been locked.
ATC
Indicates the temperature compensation is enabled.
When the battery is depleted, the icon will disappear.

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Keypad
The meter has a succinct membrane keypad, names and symbols describe each function key controls.
INDEX:
KEY
FUNCTION
MEAS/HOLD
• Switches the meter ON/OFF.
• Locks the measured value, press the key again to resume measuring.
• Exits the calibration or setting and returns to the measurement mode.
CAL
• Press the key to start the calibration.
• Press and hold the key to enter the setup menu.
• In the setting mode, press the key to select the default option.
ENTER
• Confirms the calibration or selected option.

3
Prior to Use
•Remove the electrode protective cap from the meter.
•If the glass sensitive membrane on the electrode dries out, soak the electrode in 3M KCL solution for at least 15 minutes.
Preparing the pH Buffer Solutions
•Open the pH7.00 buffer packet, place the reagent into a 250ml volumetric flask. Pour the distilled water 250ml to scale line, mix the
solution until the reagent is completely dissolved.
•Preparation of pH4.01 and 10.01 standard buffer solutions are the same as above. Prepared standard buffer solutions should be stored
in hermetically sealed glass containers.
Switching the Meter On and Off
•Press the Meas key to switch on the meter, the display shows measured value.
•Press and hold the Meas key for 5 seconds, the meter will switch off.
•To enable the Auto-Power Off function, please refer to chapter SETUP MENU.
Glass Sensitive
Membrane

4
Setup Menu
PCE-PH 28L pocket pH meter contains an integrated setup menu that is used to customize the displayed option to meet measurement
requirements.
MENU
DESCRIPTION
OPTIONS
DEFAULT
Set the pH buffer group for calibration and auto-
recognition.
USA (pH4.01/7.00/10.01)
USA
NIST (pH4.01/6.86/9.18)
Set the number of calibration points.
1 point
2 points
2 points
3 points
Set the default temperature unit.
Degrees Celsius
°C
Degrees Fahrenheit
Calibrate the temperature.
---
---
When the option is enabled, the meter will
automatically sense a stable reading and lock the
measurements.
Enable
Disable
Disable
When the option is enabled, the meter will
automatically switch off if no key is pressed within 8
minutes.
Enable
Disable
Disable
Reset the meter to factory default settings.
Enable
Disable
Disable
Setting the default option
1. Press and hold the Cal key for 3 seconds to enter the setup menu, the meter shows a menu item and default option.
2. If necessary, press the Cal key again to select the desired option.
3. Press the Enter key to confirm, the meter moves to the next menu item.
4. Repeat the steps above until the meter returns to the measurement mode. Setting is completed.

•During the setting process, press the Meas key, the meter will exit the setup menu and return to the measurement mode.
•If you do not want to calibrate the temperature, press the Enter key to skip the °C/CAL or °F/CAL option.
•The Reset function will restore the meter back to factory default settings. If enabled, all of the calibration data and selected parameters
will be lost or reset, the meter must be recalibrated.
Option

5
pH Calibration
PCE-PH 28L pocket pH meter allows up to 3 points calibration. We recommend that you perform at least 2 points calibration for high accuracy
measurement. The meter will automatically recognize and calibrate to following standard buffer values.
USA Standard Buffers
pH4.01, 7.00, 10.01
NIST Standard Buffers
pH4.01, 6.86, 9.18
Single point calibration should only be carried out with pH7.00 or pH6.86, otherwise calibration will not be accepted.
The meter must be calibrated prior to first use or new electrode replaced. To ensure accuracy, regular calibration is recommended. DO NOT
reuse the pH buffer solution after calibration, contaminants in solution will affect the calibration and eventually the accuracy of the
measurement.
Single point calibration
1.1 Make sure that you have selected 1 point calibration in the setup menu.
1.2 Rinse the electrode with distilled water. Press the Cal key, the meter shows
pH7.00/CAL1 (or pH6.86/CAL1).
1.3 Place the electrode into the pH7.00 (or pH6.86) buffer solution, the end of the
electrode must be completely immersed into the calibration solution. Stir the
electrode gently to create a homogeneous solution.
1.4 Press the Enter key, the meter begins the calibration.
1.5Wait for the reading to stabilize, the display automatically shows END. Single
point calibration is completed.

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2 points calibration
2.1 Make sure that you have selected 2 points calibration in the setup menu.
2.2 Repeat the steps 1.2 to 1.4 above. When the first calibration point is completed,
the display will show CAL2. The meter prompts you to continue with second
point calibration.
2.3 Rinse the electrode with distilled water. Place the electrode into the pH4.01 or
10.01 (pH4.01 or 9.18) buffer solution. Stir the electrode gently.
2.4 Press the Enter key, the meter automatically recognizes the current calibration
solution and begins the calibration.
2.5Wait for the reading to stabilize, the display automatically shows the electrode
slope (e.g. 99%) and END. Second point calibration is completed.
3 points calibration
3.1 Make sure that you have selected 3 points calibration in the setup menu.
3.2 Repeat the steps 1.2 to 1.4 above. When the first calibration point is completed,
the display will show pH4.01/CAL2. The meter prompts you to continue with
second point calibration.

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3.3 Rinse the electrode with distilled water. Place the electrode into the pH4.01
buffer solution. Stir the electrode gently.
3.4 Press the Enter key, the meter begins the calibration.
3.5Wait for the reading to stabilize, the display automatically shows the electrode
slope and pH10.01/CAL3 (or pH9.18/CAL3).
3.6Rinse the electrode with distilled water. Place the electrode into the pH10.01
(or pH9.18) buffer solution. Stir the electrode gently.
3.7 Press the Enter key, the meter begins the calibration.
3.8 Wait for the reading to stabilize, the display automatically shows the electrode
slope and END. Calibration is completed.
If you want to exit the calibration, press the Meas key, the meter will
immediately return to the measurement mode.

8
Temperature Calibration
During the measurement process, if the temperature reading displayed differs from that of an accurate thermometer, the meter needs to be
calibrated.
1. Press and hold the Cal key for 3 seconds to enter the setup menu.
2. Press the Enter key until the meter shows °C/CAL or °F/CAL.
3. Press the Cal key to enter the temperature calibration mode.
4. Press the Cal key again to modify the temperature value.
5. Press the Enter key to confirm, the meter shows the next menu item.
6. Press the Meas key to return to the measurement mode. Calibration is
completed.

9
pH Measurement
•Rinse the electrode thoroughly with distilled water.
•Place the electrode into the sample solution, stir the electrode gently.
•Record the measured value when the reading is stable.
Auto-Hold
PCE-PH 28L pocket pH meter contains an Auto-Hold function. If enabled, the meter will automatically sense a stable reading and lock the
measurements. The icon appears on the display. If disabled, press the Hold key, the meter will immediately lock the displayed value.
Press the Meas key to resume measuring.
Electrode Care and Maintenance
•For best results, please always keep the glass sensitive membrane wet.
•Ensure that the electrode is thoroughly washed with distilled or deionized water after use.
•If you do not use the meter for long periods, store the electrode into the 3M KCL solution.
Electrode Replacement
When the meter fails to calibrate or gives fluctuating readings for calibration standards, you need to replace the electrode.
1. Twist the electrode collar counter clockwise, pull the old electrode away from the meter.
2. Align the slot on the new electrode, gently push the electrode into the meter.
3. Twist the electrode collar clockwise until it is tight. Installation is completed.

10
Troubleshooting
LCD DISPLAY
CAUSE
CORRECTIVE ACTION
Electrode dried out
Soak the electrode in 3M KCL solution at least 20 minutes.
Measured value is out of range
Check the electrode whether clogged, dirty or broken.
Incorrect pH buffer solutions
Using the fresh pH buffer solutions for calibration.
Electrode is broken
Replace the electrode.
pH Electrode Selection Guide
PCE-PH 28L pocket pH meter installed with a long-reach pH electrode that is used to measure the pH of the small volume samples. If this
electrode can not meet your measurement requirements, please refer to the table below to select an applicable sensor.
ELECTRODE
ORDER CODE
DESCRIPTION
General purpose pH electrode, suitable for measuring the non-
viscous, non-corrosive liquids.
Flat surface pH electrode, suitable for measuring the semisolid
substances, e.g., cheese, meats, paper, etc.
Specifications
pH
Model
PHscan30L
Range
-1.00~15.00pH
Accuracy
±0.01pH
Resolution
0.01pH
Calibration Points
1 to 3 points
pH Buffer Options
USA (pH4.01/7.00/10.01) or NIST (pH4.01/6.86/9.18)
Automatic Buffer Recognition
Yes
Temperature
Range
0~60°C, 32~140°F
Accuracy
±1°C
Resolution
0.1°C
Calibration Points
1 point
General
Temperature Compensation
0~60°C, 32~140°F, Automatic
Sensor Type
E-PHSCAN-LT-10K
Operating Temperature
0~60°C, 32~140°F
Relative Humidity
< 80%
Power Requirements
2 × 1.5V "AAA" batteries
Dimensions
240 (L) × 40 (Dia.) mm
Weight
100g

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Warranty
You can read our warranty terms in our General Business Terms which you can find here:
https://www.pce-instruments.com/english/terms.
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.

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PCE Instruments contact information
Germany
PCE Deutschland GmbH
Im Langel 4
D-59872 Meschede
Deutschland
Tel.: [phone]
Fax: [phone]
[e-mail]
www.pce-instruments.com/deutsch
France
PCE Instruments France EURL
23, rue de Strasbourg
67250 Soultz-Sous-Forets
France
Téléphone: [phone]
Numéro de fax: [phone]
[e-mail]
www.pce-instruments.com/french
Spain
PCE Ibérica S.L.
Calle Mayor, 53
02500 Tobarra (Albacete)
España
Tel. : [phone]
Fax: [phone]
[e-mail]
www.pce-instruments.com/espanol
Germany
PCE Produktions- und
Entwicklungsgesellschaft mbH
Im Langel 26
D-59872 Meschede
Deutschland
Tel.: [phone]
Fax: [phone] 9971
[e-mail]
www.pce-instruments.com/deutsch
United Kingdom
PCE Instruments UK Ltd
Unit 11 Southpoint Business Park
Ensign Way, Southampton
Hampshire
United Kingdom, SO31 4RF
Tel: [phone]
Fax: [phone]
[e-mail]
www.pce-instruments.com/english
Italy
PCE Italia s.r.l.
Via Pesciatina 878 / B-Interno 6
55010 Loc. Gragnano
Capannori (Lucca)
Italia
Telefono: [phone]
Fax: [phone]
[e-mail]
www.pce-instruments.com/italiano
The Netherlands
PCE Brookhuis B.V.
Institutenweg 15
7521 PH Enschede
Nederland
Telefoon: [phone]
[e-mail]
www.pce-instruments.com/dutch
China
PCE (Beijing) Technology Co., Limited
1519 Room, 6 Building
Zhong Ang Times Plaza
No. 9 Mentougou Road, Tou Gou District
102300 Beijing, China
Tel: [phone]
[e-mail]
www.pce-instruments.cn
Hong Kong
PCE Instruments HK Ltd.
Unit J, 21/F., COS Centre
56 Tsun Yip Street
Kwun Tong
Kowloon, Hong Kong
Tel: [phone]
[e-mail]
www.pce-instruments.cn
United States of America
PCE Americas Inc.
711 Commerce Way suite 8
Jupiter / Palm Beach
33458 FL
USA
Tel: [phone]
Fax: [phone]
[e-mail]
www.pce-instruments.com/us
Turkey
PCE Teknik Cihazları Ltd.Şti.
Halkalı Merkez Mah.
Pehlivan Sok. No.6/C
34303 Küçükçekmece - İstanbul
Türkiye
Tel: [phone]
Faks: 0212 705 53 93
[e-mail]
www.pce-instruments.com/turkish