Bante Instruments PHscan10 User manual

PHscan10/20 Pocket pH Tester
USER MANUAL
Bante Instruments Inc.

1I PHscan10/20
Overview
Thank you for selecting the PHscan series pocket pH tester. This user
manual provides a step-by-step guide to help you operate the tester,
please carefully read the following instructions before use.
Installing the Batteries
1. Remove the battery compartment lid.
2. Insert three LR44 alkaline batteries into the battery compartment,
note polarity.
3. Replace the battery compartment lid to its original position and
turn clockwise until tight.
Keypad
Key
Function
•Switch the tester on or off
•Lock or unlock measurement
•Exit calibration and return to the pH measurement
•Start calibration
•Select the pH buffer option
•Confirm the calibration or displayed option
•Toggle between pH and temperature measurement
modes (For PHscan20 tester only)
Prior to Use
Remove the protective cap (and translucent cover) from the bottom of
the tester. If some salt crystals deposited on the electrode, rinse with
tap water to clean these deposits.
If tiny air bubbles are present inside the pH-sensitive glass membrane,
gently shake the tester downward to remove air bubbles.
If the glass membrane has dried out, soak the electrode in 3M KCl or
pH 4.01 buffer solution for about 30 minutes. If above solutions are
not available, use the tap water.
Switching the Tester On and Off
•Press the Meas key to switch on the tester.
•Press and hold the Meas key to switch off the tester.
If you do not press any key within 8 minutes, the tester will switch off
automatically to conserve energy.
pH Calibration
The PHscan10/20 tester allows 2 points pH calibration. We recommend
calibrating the tester during the first use or new electrode replaced. For
better accuracy, regular calibration is recommended. Do not reuse the
buffer solutions after calibration, contaminants in solution will affect
the calibration and eventually the accuracy of the measurement.
3M KCl solution
pH-sensitive
glass membrane

PHscan10/20 I 2
1. Press and hold the Cal key to enter the calibration mode. Press the
key again to select the pH buffer option (pH 4 -7 or 10 -7).
2. Press the Enter key, the tester shows the first calibration point 7.
3. Rinse the electrode with distilled water, place the electrode into
the pH 7.00 buffer solution, stir the tester gently to create a
homogeneous solution.
4. Press the Enter key, the tester begins the calibration. When the
reading has stabilized, the calibration value will automatically
flash three times indicating that the first calibration point is
completed, the display shows CAL 4 (or CAL 10).
5. Rinse the electrode with distilled water, place the electrode into
the pH 4.01 (or 10.01) buffer solution, stir the tester gently.
6. Press the Enter key to begin the calibration. When the reading has
stabilized, the calibration value will automatically flash three times
and the CAL icon disappears from the display. Calibration is
completed.
•During the calibration, if the display shows indicating that
the measured mV value for the current calibration point deviates
by more than 60 mV ( approximately ±1 pH ) from the theoretical
value of the pH buffer. The calibration will not be accepted. Please
check the electrode and make sure the buffer solutions are fresh
and uncontaminated.
•To exit the calibration without saving calibrated values, press the
Meas key.
Measurement
pH Measurement
Rinse the electrode with distilled water, place the electrode into the
sample solution and stir gently. Note, DO NOT completely immerse
the tester in water. Wait for the measurement to stabilize and record
the reading.
If your tester installed a spear tip electrode or flat surface electrode
(refer to the Optional Accessories > pH Electrodes section) and the
samples are soft solid or semi-solid, wet the sample with clean water,
then slight pressure the electrode to take measure. Note that the pH-
sensitive membrane must be fully touched with sample surface.
Temperature Measurement
This function is applicable to PHscan20 tester only.
•Press the Enter key, the tester shows the temperature readings.
•Press the key again to return to the pH measurement.

3I PHscan10/20
•During the measurement, never wipe the pH-sensitive membrane
as this will cause static interference, blot dry with a lint-free tissue
to remove waterdrops on electrode.
•Press the key, the tester will lock the measurement, the HOLD
icon appears on the display. Press the key again to resume
measurement.
•If the display shows ---- indicating the measurement exceeds the
range, remove the tester from the sample immediately.
Electrode
Maintenance and Replacement
Cleaning the Electrode
•Since the pH-sensitive membrane is susceptible to contamination,
make sure that rinse the electrode thoroughly with distilled water
after use.
•If your sample contains the oil or grease, soak the electrode in mild
detergent or electrode cleaning solution for at least 15 minutes,
then rinse with distilled water.
•If you do not use the tester for a period longer than 1 month, store
the electrode in 3M KCl solution or electrode storage solution.
DO NOT store the electrode in distilled or deionized water, which
will deplete the hydration layer of the pH-sensitive membrane and
render the electrode useless.
Replacing the Electrode
If the tester fails to calibrate or gives fluctuating readings, you should
consider replacing the electrode.
1. Twist the electrode collar counter clockwise, pull the electrode
away from the tester.
2. Align the slot on the new electrode, gently push the electrode into
the tester.
3. Twist the electrode collar clockwise until tight.
Appendix
Preparation of pH Buffer Solutions
The PHscan10/20 tester is packaged with pH 4.01/7.00/10.01 buffer
sachets required for calibration.
1. Half fill a 250 ml volumetric flask with distilled water and add the
pH 7.00 buffer reagent.
2. Swirl the volumetric flask gently to dissolve the reagent and fill
to the mark with distilled water.
3. Cap and upend the volumetric flask several times to mix solution.
•Preparation of pH 4.01 and 10.01 buffer solutions are the same as
above.
•Prepared buffer solution should be stored in hermetically sealed
glass container and avoid direct sunlight.
Preparation of Electrode Storage Solution
Dissolve 24.6 grams of analytical grade KCl reagent in 100 ml distilled
water. Add pH 4.01 standard buffer and adjust solution to pH 4.
250 ml

PHscan10/20 I 4
Optional Accessories
pH Electrodes
Order Code and Description
E-PHscan-ST-100K
•Circular pH-sensitive membrane
•For measuring the general water samples
(non-viscous, non-corrosive liquids).
E-PHscan-FT-100K
•Flat surface pH-sensitive membrane
•For measuring surfaces of semi-solid or gel
samples, e.g., cream, paper, cloth, bread
dough, skin, etc.
E-PHscan-LT-100K
•Flat surface pH-sensitive membrane
•Electrode dimensions: 75 ×13.5 (Dia.) mm
•For measuring the small volume samples,
e.g., sample in the test tube
E-PHscan-PT-100K
•Spear tip pH-sensitive membrane
•For piercing and measuring the semi-solid
samples, e.g., soil, meat, cheese, etc.
Solutions
Order Code
Description
PHCS-USA
pH 4.01, 7.00, 10.01 buffer solutions, 480 ml
PHCS-ES
Electrode storage solution, 480 ml
PHCS-OG
Electrode cleaning solution, removes oil and
grease contaminants, 480 ml
PHCS-PR
Electrode cleaning solution, removes protein
contamination, 480 ml
Tester Specifications
Model
PHscan10
Range
0.0 to 14.0 pH
Resolution
0.1 pH
Accuracy
±0.1 pH
Calibration Point
2 points
pH Buffer Option
USA (pH 4.01, 7.00, 10.01)
Model
PHscan20
pH
Range
0.00 to 14.00 pH
Resolution
0.01 pH
Accuracy
±0.01 pH
Calibration Point
2 points
pH Buffer Option
USA (pH 4.01, 7.00, 10.01)
Temperature Compensation
0 to 60°C, automatic
Temperature
Range
0 to 60°C
Resolution
1°C
Accuracy
±1°C
General Specifications
Operating Temperature
0 to 50°C (32 to 122°F)
Storage Temperature
0 to 60°C (32 to 140°F)
Relative Humidity
< 80% (non-condensing)
IP Rating
IP54
Display
LCD, 21 ×21 mm (0.82 ×0.82 in.)
Power Requirements
3 ×1.5V LR44 alkaline batteries
Auto-Off
8 minutes after last key pressed
Dimensions
185 (L) ×40 (Dia.) mm (7.28 ×1.57 in.)
Weight
100g (3.5 oz.)

The information in this document is subject to change without notice.
Copyright © Bante Instruments Inc, 2022. All rights reserved.
Disposal
This product is required to comply with the European Union’s Waste
Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC and
may not be disposed of in domestic waste. Please dispose of product
in accordance with local regulations at the collecting point specified
for electrical and electronic equipment.
Warranty
The warranty period for tester is one year from the date of shipment.
Above warranty does not cover the electrode and pH buffer solutions.
Out of warranty products will be repaired on a charged basis.
The warranty on your tester 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 supplier.
Office: 4715 Castlewood St., Sugar land, TX 77479, USA
Tel: [phone]
E-mail: [email protected]
Factory: F3, Building 2, No.2185, Laifang Rd., Shanghai 201615, China
Tel: [phone]
E-mail: [e-mail]
www.bante-china.com