PHscan40BNC Pocket pH Tester
Instruction Manual
BANTE INSTRUMENTS LIMITED
PHscan40BNC Pocket pH Tester
1
Introduction
Thank you for selecting the PHscan40 pocket pH tester. This manual provides a step-by-step guide to help you operate the meter, please carefully read the
following instructions before use. The following list describes the standard accessories of the tester. After the unpacking, please check all accessories are
complete. If any are damaged or missing, please contact nearest distributor.
ACCESSORIES:
● pH Electrode
● pH Buffer Pouches (pH4.01/7.00/10.01)
● AAA Batteries
Keypad
PHscan40 pocket pH tester has a succinct membrane keypad, names and symbols describe the each function key controls.
INDEX:
KEY
FUNCTION
MEAS/HOLD
● Power the tester ON/OFF.
● Freezes the measured value on the display, press the key again to resume measuring.
● In the calibration mode, exits calibration and returns to measurement mode.
CAL
● Press the key to enter the calibration mode.
● Press and hold the key to enter the setup menu.
● In the setup mode, press the key to select default options.
ENTER
● Confirms the calibration or selected option.
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Display
The tester is equipped with a clear LCD display that used to show measured value, mode indicators and unit indicators.
INDEX:
INDICATOR
DESCRIPTION
MEAS
Indicates tester is in the measurement mode
CAL
Indicates tester is in the calibration mode
SETUP
Indicates tester is in SETUP mode
HOLD
Indicates the measured value has been frozen
ATC
Indicates temperature compensation is enabled
Connecting the pH Electrode
● Take out the pH electrode from the carrying case.
● Insert the connector of electrode into the BNC connector socket on the tester. Rotate and push the connector clockwise until it locks. After
connection is completed, DO NOT pull on the sensor cord. Always make sure that the connector is clean and dry.
Preparing the pH Buffer Solutions
PHscan40 pocket pH tester is packaged with three pH buffer packets required for calibration.
● Open the pH7.00 buffer packet, place the powder into a 250ml volumetric flask. Pour distilled water 250ml to scale line, mix the solution until
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.
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Prior to Use
Remove the protective cap from the bottom of the pH electrode. If the glass sensitive membrane on the electrode dries out, soak the sensor in 3M KCL
solution or tap water for at least 15 minutes. DO NOT use distilled or deionized water, it will shorten the life of sensor.
Power On/Off
● Press MEAS key to turn on the tester, the display shows measured value.
● Press and hold the MEAS key for 5 seconds, the tester will turn off.
● If you do not press any key for 8 minutes, the tester will automatically turn off to conserve energy.
To disable the auto-off function, please read the SETUP MENU section.
Setup Menu
PHscan40 pocket pH tester contains an integrated setup menu that allows you to customize each option to meet measurement requirements.
PARAMETER
DESCRIPTION
OPTIONS
DESCRIPTION
DEFAULT
pH Buffer
USA Standard (pH4.01/7.00/10.01)
●
NIST Standard (pH4.01/6.86/9.18)
Calibration Point
1 point
2 points
●
3 points
Temperature Unit
Degrees Celsius
●
Degrees Fahrenheit
Temperature Setting
Enters the temperature setting mode
Auto-Hold
Automatically freezes a stable reading
Disable
●
Auto-Off
Automatically turn off the tester
●
Disable
Reset
Restore factory settings
Disable
●
……..…. Glass Sensitive Membrane
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Setting the Default Parameters
1. Press and hold the CAL key for 3 seconds to enter setup menu, the tester shows default pH buffer option.
2. If necessary, press CAL key again to select the USA or NIST standard. Press ENTER key to confirm, the tester goes to calibration point selection
mode, the display shows “2/CAL” (2 points calibration).
3. Press CAL key to select the number of calibration points (1, 2 or 3 points), press ENTER key to confirm. The tester goes to temperature unit
selection mode, the display shows “oC/UNIT”.
4. Press CAL key to select the temperature unit (oC or oF), press ENTER key to confirm. The tester goes to temperature setting mode, the display
shows “oC/CAL”.
5. Press ENTER key to enter next option, the tester shows “YES/HOLD” indicating that the auto-hold function is enabled.
If the auto-hold function is enabled, the tester will automatically sense a stable endpoint reading and freeze it. If you disable this function, the tester
allows user to freeze the reading by pressing the HOLD key.
6. Press CAL key to enable or disable the auto-hold function, press ENTER key to confirm. The tester shows “YES/OFF” indicating that the auto-off
function is enabled.
Cal
Enter
Enter
Enter
Enter
PHscan40BNC Pocket pH Tester
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When the auto-off function is enabled, if you do not press any keys for 8 minutes, the tester will automatically turn off to conserve energy.
7. Press CAL key to enable or disable the auto-off function, press ENTER key to confirm. The tester shows “NO/RST” indicating that do not reset the
tester.
WARNING:
Reset function will restore the tester back to factory default settings, all calibration values and selected parameters will be reset.
8. Press CAL key to enable or disable the reset function, press ENTER key to confirm. The tester returns to measurement mode. Setting is completed.
EXIT THE SETUP MENU:
During the setup mode, press MEAS key, the tester will return to measurement mode immediately.
Temperature Compensation
In order to get accurate results, you need to enable the manual temperature compensation before measurement or calibration.
1. Check the temperature of sample using an accurate thermometer.
2. Press and hold the CAL key for 3 seconds to enter setup menu.
3. Press ENTER key until display shows the “oC/CAL” or “oF/CAL”.
4. Press CAL key to enter the temperature setting mode.
5. Press CAL key again to set temperature value (Resolution: 0.5oC).
6. Press ENTER key to confirm, the display shows next option.
7. Press MEAS key, the tester returns to measurement mode. Setting is completed.
Enter
Enter
Enter
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pH Calibration
PHscan40 pocket pH tester allows up to 3 points calibration. We recommend that you perform at least 2 points calibration for high accuracy measurement.
The tester can automatically recognise and calibrate to following standard buffer values.
● USA Standard Buffer Options: pH4.01, 7.00, 10.01
● NIST Standard Buffer Options: 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 tester must be calibrated prior to first use or new electrode replaced. To ensure accuracy, regular calibration is recommended. Do not reuse calibration
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 pH electrode with distilled water. Press CAL key, the tester shows “pH7.00/CAL1” or “pH6.86/CAL1”.
1.3 Dip the pH electrode into the pH7.00 (or pH6.86) standard buffer solution, the end of the sensor must be completely immersed into the calibration
solution. Stir the electrode gently.
1.4 Press ENTER key to confirm. Wait for the measured value to stabilize, the display shows “END”. Single point calibration is completed.
2 POINTS CALIBRATION:
2.1 Make sure that you have selected 2 points calibration in the setup menu.
2.2 Repeat steps 1.2 to 1.4 above. When the first calibration point is completed, the display will show “CAL2”. The tester prompts you to continue with
second point calibration.
2.3 Rinse the pH electrode with distilled water. Dip the electrode into the pH4.01 or 10.01 (pH4.01 or 9.18) standard buffer solution. Stir the sensor
gently.
2.4 Press ENTER key to confirm. Wait for the measured value to stabilize, the display shows electrode slope and “END”. Second point calibration is
completed.
Cal
Enter
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3 POINTS CALIBRATION:
3.1 Make sure that you have selected 3 points calibration in the setup menu.
3.2 Repeat steps 1.2 to 1.4 above. When the first calibration point is completed, the display will show “pH4.01/CAL2”. The tester prompts you to
continue with second point calibration.
3.3 Rinse the pH electrode with distilled water. Dip the electrode into the pH4.01standard buffer solution. Stir the sensor gently.
3.4 Press ENTER key to confirm. Wait for the measured value to stabilize, the display shows electrode slope and “pH10.01/CAL3” (or “pH9.18/CAL3”).
3.5 Rinse the pH electrode with distilled water again. Dip the electrode into the pH10.01 (or pH9.18) standard buffer solution. Stir the sensor gently.
3.6 Press ENTER key to confirm. Wait for the measured value to stabilize, the display shows electrode slope and “END”. Calibration is completed.
EXIT THE CALIBRATION:
During the calibration process, press MEAS key, the tester will return to measurement mode immediately.
pH Measurement
● Rinse the pH electrode thoroughly with distilled water.
● Dip the electrode into the sample solution, stir the sensor gently.
● Wait for the reading to stabilize, record the measured value on the display.
Enter
Enter
Enter
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Hold Function
PHscan40 pocket pH tester contains two data hold modes. When the Auto-Hold function is enabled, the tester will automatically sense a stable endpoint
reading and freeze it, “HOLD” indicator appears on the display. If the Auto-Hold function is disabled, press HOLD key, the tester will immediately freeze
currently displayed value. Press the key again to resume measuring.
Electrode Care and Maintenance
Since pH electrode is susceptible to dirt and contamination, clean as necessary depending on the extent and condition of use.
AFTER MEASURING:
Rinse the pH electrode in distilled water, store the electrode into the electrode storage solution.
CLEANING THE ELECTRODE:
● Salt deposits: Soak the electrode in warm tap water to dissolve deposits, then thoroughly rinse with distilled water.
● Oil or Grease film: Wash the electrode bulb gently in some detergents and water. If necessary, using the alcohol to clean the electrode bulb, then
rinse with distilled water. Place the sensor in the electrode storage solution for 30 minutes.
● Clogged reference junction: Heat a diluted KCl solution to 60 oC to 80oC. Place the sensing part of the electrode into the heated solution for about 10
minutes. Allow the electrode to cool in some unheated KCl solution.
● Protein deposits: Prepare a 1% pepsin solution in 0.1M of HCL. Place the electrode in the solution for 10 minutes. Rinse the sensor with distilled
water.
REACTIVATING THE ELECTRODE:
If stored and cleaned properly, the electrode should be ready for immediate use. However, a dehydrated bulb may cause sluggish response. To rehydrate the
bulb, immerse the electrode in a pH4.01 buffer solution for 10 to 30 minutes. If this fails, the electrode requires activation.
● Soak the pH electrode in 0.1M HCl for 5 minutes.
● Remove and rinse with deionized water, then place in 0.1M NaOH for 5 minutes.
● Remove and rinse again, and soak in electrode storage solution for 30 minutes.
HOW TO PREPARE THE ELECTRODE STORAGE SOLUTION:
Dissolve 22.365 grams of potassium chloride reagent (KCL) in the 100mL distilled water. Stir the solution until the solution has thoroughly mixed.
Hold
Meas
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Replacing the Batteries
If the battery indicator is disappeared during the use, you need to replace the batteries immediately.
1. Twist the electrode collar counter clockwise, pull the BNC connector out from the tester.
2. Insert two “AAA” batteries into the battery compartment, note polarity.
3. Align the slot on the connector, push the BNC connector into the tester.
4. Twist the electrode collar clockwise until it is tight.
+
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Optional pH Electrodes
PHscan40 pocket pH tester is equipped with a general purpose pH electrode, if it can not fully meet your measurement requirements, please refer to the
table below to select an applicable sensor.
SAMPLE TYPE
P11
P12
P13
P14
P16
P17
P18
P19
P20
P21
Agar
● Beer
● ● ●
● ●
●
●
Blood Products
● ● ●
● ● Bread, Dough
●
●
Cement ●
Cosmetics
● ● ●
● ●
● Dairy Products
● ● ●
● ● Education ●
● ●
●
Fats/Cream
●
Field Use
●
●
● ●
Fish Products
● ● Lab Flasks
● Low Ionic ●
● Meat, Cheese
● ● Micro Samples
●
Paint
●
●
● Photographic
Soil
●
●
Surface
● Test Tubes
●
●
Tris Buffer
●
Viscose Samples
●
Troubleshooting
LCD DISPLAY
CAUSE
CORRECTIVE ACTION
Electrode dried out
Soak the pH electrode in 3M KCL solution or tap water for 10 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 pH electrode module
PHscan40BNC Pocket pH Tester
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Specifications
Model
PHscan40BNC
pH Range
-1.00~15.00pH
pH Accuracy
± 0.01pH
Resolution
0.01pH
Calibration Points
1 to 3 points
Calibration Solutions
USA (pH4.01/7.00/10.01) or NIST (pH4.01/6.86/9.18)
Temperature Compensation
0~100°C, 32~212°F, Manual
Connector
BNC
Operating Temperature
0~60°C, 32~140°F
Power Requirements
2× 1.5V "AAA" Batteries
Battery Life
Approximately 200 hours
Dimensions
175(L)× 40(Dia.)mm
Weight
100g
Hazardous Substance Statement
Bante Instruments Limited is committed to the reduction and eventual elimination of all hazardous substances in both the manufacturing process and finished
products we supply. We have an active manufacturing and procurement program to minimize and eliminate the use of harmful heavy metals such as cadmium,
lead, mercury and the like. New technologies and design parameters are also promoting these efforts and we expect to have little or no such materials in our
product in the coming years. We welcome our customer suggestions on how to speed up these efforts.
Warranty
The warranty period for tester is one year from the date of shipment. Above warranty does not cover sensor and calibration solutions. Out of warranty
products will be repaired on a charged basis. The warranty on your meter 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.
For more information, please contact the nearest authorized distributor.
BANTE INSTRUMENTS LIMITED
E-mail: banteinstruments@yahoo.com
Phone: +8621-6404-1598
Website: www.bante-china.com
The information in this document is subject to change without notice. Copyright © Bante Instruments Limited, 2015. All rights reserved.
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