Bante Instruments PHscan40 Manuale utente

PHscan40 Pocket pH Tester

USER MANUAL

Bante Instruments Inc.

1 IPHscan40

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. Twist the connector collar counter clockwise, pull the BNC

connector away from the tester.

2. Insert two AAA alkaline batteries into the battery compartment,

note polarity.

3. Push the BNC connector into the tester and twist the connector

collar clockwise until tight.

Keypad

Key

Function

•Switch the tester on or off

•Lock or unlock measurement

•Exit the calibration, settings and return to the pH

measurement

•Start calibration

•Press and hold the key to enter the setup menu

•Select an option

•Confirm the calibration, settings or displayed option

Display

Icon

Description

When the battery voltage falls below the minimum

power requirements, the icon automatically

disappears

MEAS

Indicates that the tester is in the measurement mode

CAL

Indicates that the tester is in the calibration mode

SETUP

Indicates that the tester is in the setup mode

ATC

Indicates that the temperature compensation is enabled

Prior to Use

1. Take out the pH electrode from the carrying case. Insert the BNC

connector into the connector socket on tester, rotate and push

the connector clockwise until it locks.

2. Remove the protective cap from the bottom of the electrode. If

tiny air bubbles are present inside the pH-sensitive glass

membrane, gently shake the electrode downward to remove air

bubbles.

3. If the glass membrane has dried out, soak the electrode in 3M

KCl or pH 4.01 buffer solution for about 30 minutes.

Switching the Tester On and Off

•Press and hold the Meas key for about 5 seconds 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.

3M KCl solution

PHscan40 I2

Setup Menu

The PHscan40 tester contains 7 menu items in the setup menu, the

following table describes the functions of each option.

Menu Item

Option and Description

pH Buffer Group

Set the pH buffer group for calibration and auto-

recognition.

USA (default)

NIST

Calibration Points

Set the number of calibration points.

1 point

2 points (default)

3 points

Measurement Unit

Set the default temperature unit.

Degrees Celsius (default)

Degrees Fahrenheit

Temperature Compensation

Refer to page 3.

Range: 0 to 100° C

Range: 0 to 210°F

Auto-Hold

If enabled, the tester will automatically sense and

lock the measurement endpoint.

Enable

Disable (default)

Auto-Power Off

If enabled, the tester will automatically switch off

if no key is pressed within 8 minutes.

Enable (default)

Disable

Factory Reset

If enabled, all of the calibration values and current

settings will be deleted or reset to the factory

defaults, the tester must be recalibrated.

Enable

Disable (default)

Setting the Default Option

1. In the measurement mode, press and hold the Cal key to enter

the setup menu.

2. If necessary, press the Cal key again to select an option.

3. Press the Enter key, the tester saves the current option and moves

to the next menu item.

4. Repeat steps above until the tester returns to the measurement

mode.

•During the setting process, if you do not need to modify the

temperature, press the Enter key to skip the /or /

option.

•To exit the setup menu, press the Meas key.

Option

Menu item

3 IPHscan40

Temperature Compensation

In order to obtain accurate measurement results, we recommend that

enabling the manual temperature compensation before calibration and

measurement. The tester will automatically calculate the pH slope

with inputted temperature and shows the temperature compensated

readings.

1. Press and hold the Cal key to enter the setup menu.

2. Press the Enter key until the display shows /or /.

3. Press the Cal key, the tester enters the temperature setting mode.

4. Press the Cal key again to set the temperature value.

5. Press the Enter key to save and press the Meas key to return to

the measurement mode.

•During the setting process, press the Cal key once, the

setting value will increase or decrease by 0.5. Press and hold

the key, the setting value will increase or decrease by 1.

•To exit the temperature setting without saving changes, press

the Meas key.

pH Calibration

The PHscan40 tester allows 1 to 3 points calibration, we recommend

that you perform at least 2 points calibration for accurate pH

measurement, the tester will automatically recognize and calibrate to

following standard buffer values.

USA standards

pH 4.01, 7.00, 10.01

NIST standards

pH 4.01, 6.86, 9.18

Single point calibration should only be carried out with the pH 7.00

or 6.86, otherwise calibration will not be accepted.

For better accuracy, we recommend calibrating the tester regularly.

DO NOT reuse the buffer solutions after calibration, contaminants in.

solution will affect the calibration and eventually the accuracy of the.

measurement.

Single Point Calibration

Ensure that you have selected 1 point calibration in the setup menu.

1.1 Press the Cal key, the tester shows pH 7.00/CAL 1.

1.2 Rinse the electrode with distilled water and place into the pH

7.00 buffer solution, stir the electrode gently to create a

homogeneous solution.

1.3 Press the Enter key, the tester begins the calibration. When the

reading has stabilized, the display will show . Calibration

is completed.

PHscan40 I4

2 Points Calibration

Ensure that you have selected 2 points calibration in the setup menu.

2.1 Repeat steps 1.1 through 1.3 above. When the first calibration

point is completed, the display will show ---- / CAL 2, the tester

prompts you to continue with second point calibration.

2.2 Rinse the electrode with distilled water and place into the pH

4.01 or 10.01 buffer solution, stir the electrode gently.

2.3 Press the Enter key, the tester automatically recognizes the buffer

solution and begins calibration. When the reading has stabilized,

the display automatically shows the electrode slope (e.g., 99%)

and . Second point calibration is completed.

3 Points Calibration

3.1 Repeat steps 1.1 through 1.3 above. When the first calibration

point is completed, the display will show pH 4.01/CAL 2, the tester

prompts you to continue with second point calibration.

3.2 Rinse the electrode with distilled water and place into the pH

4.01 buffer solution, stir the electrode gently. Press the Enter

key to begin the calibration.When the reading has stabilized, the

display will automatically show the electrode slope and pH 10.01

/CAL 3.

3.3 Rinse the electrode with distilled water and place into the pH

10.01 buffer solution, stir the electrode gently. Press the Enter

key to begin the calibration. When the reading has stabilized,

the display will automatically shows the electrode slope and

. 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

1. Rinse the electrode with distilled water. Place the electrode into

the sample solution and stir gently. Note, the pH-sensitive glass

membrane and liquid junction must be completely immersed into

the solution.

2. If the option is enabled in the setup menu, the tester will

automatically lock the measurement endpoint and show HOLD

icon. Press the Meas key to resume measuring.

If the option is disabled, the tester will continuously measure and

update the readings.

3. Wait for the measurement to stabilize and record the reading.

4. When all of the samples have been measured, rinse the electrode

according to the instructions in the Electrode Maintenance.

During the measurement process, if the display shows ---- indicating

the measurement exceeds the range.

Appendix

Preparation of pH Buffer Solutions

The PHscan40 tester is packaged with the 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.

Optional Accessories

pH Electrode

Order Code

Description

E201-BNC

General purpose pH electrode, epoxy body, 12 mm

(0.47 in.) diameter. For liquids.

E202-BNC

Flat surface pH electrode, epoxy body, 12 mm

(0.47 in.) diameter. For semisolid samples.

P11

General purpose pH electrode, Glass body, 12 mm

(0.47 in.) diameter. For weak corrosive liquids.

5 IPHscan40

250 ml

Electrode Maintenance

Cleaning the Electrode

Since pH electrode is susceptible to contamination, thoroughly clean

as necessary after each use.

•General Cleaning

Rinse the pH electrode with distilled water and soak in 3M KCl

solution.

•Salt Deposits

Dissolve the deposit by immersing the electrode in warm tap

water. Rinse the electrode with distilled water and soak in 3M

KCl solution.

•Oil or Grease

Place the electrode in the detergent or ethanol solution for 15

minutes. Rinse the electrode with distilled water and soak in 3M

KCl solution.

•Protein

(1) Add 1% pepsin to 0.1M HCl solution.

(2) Place the electrode in above solution for 15 minutes.

(3) Rinse the electrode with distilled water and soak in 3M KCl

solution.

•Clogged Liquid Junction

(1) Heat a diluted KCl solution to 60° C (140° F).

(2) Place the electrode into the heated solution for 10 minutes.

(3) Allow the electrode to cool in unheated KCl solution.

Reactivating the Electrode

If the pH-sensitive membrane has dried out, the electrode response

will become sluggish. Immerse the electrode in a pH 4.01 buffer

solution for about 30 minutes to rehydrate. If this fails, the electrode

requires activation.

1. Soak the electrode in 0.1M HCl for 10 minutes.

2. Remove and rinse with distilled water, then place into 0.1M

NaOH for 10 minutes.

3. Remove and rinse again, and soak in 3M KCl solution for at least

6 hours.

If these steps fail to restore the response, replace the electrode.

Storing the Electrode

For best results, always soak the electrode in 3M KCl solution. If above

solution is not available, use a pH 4.01 buffer solution.

DO NOT store the electrode in distilled or deionized water that will

deplete the hydration layer of the pH-sensitive membrane and render

the electrode useless.

If you do not use the electrode for a period longer than 1 month, store

the electrode in storage solution.

PHscan40 I6

Solutions

Order Code

Description

PHCS-USA

pH 4.01, 7.00, 10.01 buffer solutions,

480 ml

PHCS-NIST

pH 4.01, 6.86, 9.18 buffer solutions,

480 ml

PHCS-ES

Electrode storage solution, 480 ml

PHCS-GC

Electrode cleaning solution, removes

inorganic residues, 480 ml

PHCS-PR

Electrode cleaning solution, removes

protein contamination, 480 ml

Tester Specifications

Model

PHscan40

Range

-1.00 to 15.00 pH

Resolution

0.01 pH

Accuracy

± 0.01 pH

Calibration Point

1 to 3 points

pH Buffer Option

USA or NIST

Automatic Buffer

Recognition

pH 4.01, 7.00, 10.01 or 4.01, 6.86, 9.18

Temperature Compensation

0 to 100° C (32 to 210° F), manual

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

2 × 1.5V AAA alkaline batteries

Auto-Off

8 minutes after last key pressed

Dimensions

175 (L) × 40 (Ø ) mm (6.89 × 1.57 in.)

Weight

100g (3.5 oz.)

The information in this document is subject to change without notice.

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: (+1) 346-762-7358

E-mail: [email protected]

Factory: F3, Building 2, No.2185, Laifang Rd., Shanghai 201615, China

Tel: (+86) 21-6404-1598

E-mail: banteinstrument@hotmail.com

www.bante-china.com

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