Bante-210 Benchtop pH Meter User Manual

Bante-210 Benchtop pH Meter

Introduction

Thank you for selecting the 210 benchtop pH meter. This user manual provides a step-by-step guide to help you operate the meter, please carefully read the following instructions before use. Any use outside of these instructions may invalidate your warranty and cause permanent damage to the meter.

Environmental Conditions

Before unpacking, ensure that current environmental conditions meet the following requirements.

• The relative humidity is less than 80%
• Ambient temperature between 0° C (32° F) and 50° C (122° F)
• No potential electromagnetic interference
• No corrosive gas exists

Packing List

The following list describes all components of the meter. If any items are missing or damaged, contact the supplier immediately.

• 210 meter
• Electrode arm
• 9V DC power adapter
• pH electrode
• TP-10K temperature probe
• pH buffer reagents 4.01, 7.00, 10.01

Meter Overview

1. Sensor connections
2. The base plate of the electrode arm
3. The base plate of the electrode arm
4. Membrane keypad

Connectors

• Socket for pH or ORP electrode (BNC)
• Socket for reference electrode (3.5 mm jack)
• Socket for temperature probe (3.5 mm jack)
• Socket for power adapter

Membrane keypad

• Socket for pH or ORP electrode (BNC)
• Socket for reference electrode (3.5 mm jack)
• Socket for temperature probe (3.5 mm jack)
• Socket for power adapter

Display

Keypad

1.  Switch the meter on or off
2. Lock or unlock the measurement
3. Exit the calibration, settings and return to the measurement mode
4. Toggle between the pH and mV measurement modes
5. Start calibration
6. Press and hold the key to enter the setup menu
7. Set the temperature
8. Increase value or scroll up through a list of options
9. Decrease value or scroll down through a list of options
10. Confirm the calibration or displayed option

Installing the Electrode Holder

Take out the electrode arm from the accessory box. The base plate of the electrode arm has a circular hole, the electrode arm has a connecting rod. Insert the connecting rod into the circular hole and swivel the electrode arm 90 degrees. The electrode holder is now ready to swing into the desired position. Adjusting the Electrode Arm After installation, if the electrode arm automatically rises or falls, you are able to adjust the screw until the arm locates at any position.

1.  Remove the plastic cover from the right side of the electrode arm.
2.  Use the screwdriver to tighten the screw moderately.
3.  Insert the plastic cover to the previous position.

Connection

Connecting the pH Electrode

1. Take out the electrode from the packaging. Follow the steps below to place the electrode into the left or right side of the electrode arm.
2. Insert BNC connector into the connector socket labeled pH/ISE.
3.  After the connection is completed, DO NOT pull on the cable. Always make sure that the connector is clean and dry.

Connecting the Temperature Probe

1.  Place the temperature probe into the circular hole located at the center of the electrode arm.
2.  Insert the jack plug to the connector socket labeled ATC. Ensure the connector is fully seated.

Connecting the Power Adapter

1. Insert the connector of the power adapter to the power socket.
2. Plug the 9V DC power adapter into the wall outlet.

Prior to Use

Remove the protective cap from the bottom of the pH electrode. If. tiny air bubbles are present inside the pH-sensitive glass membrane, gently shake the electrode downward to remove air bubbles.

Preparation of pH Buffer Solutions

1.  The meter is packaged with pH 4.01, 7.00, 10.01 buffer reagents required for calibration. 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 it to the mark with distilled water.
3.  Cap and upend the volumetric flask several times to mix the solution.
4. The preparation of pH 4.01 and 10.01 buffer solutions is the same as above.
5. Prepared buffer solution should be stored in a hermetically sealed glass container and avoid direct sunlight.

Switching the Meter On and Off

• Press the Meas key for about 3 seconds and release it to switch on the meter.
• Press and hold the Meas key to switch off the meter.

Meter Setup

The 210 meter contains an integrated setup menu for customizing the displayed option to meet measurement requirements. The following table describes the functions of each menu item.

1. pH Buffer Group Set the pH buffer group for calibration and auto-recognition.
2. USA (default)
3. NIST
4. Calibration Points Set the number of calibration points.
5.  point
6. points (default)
7. points
8. Measurement Unit Set the default temperature unit.
9. Degrees Celsius (default)
10. Degrees Fahrenheit
11. Auto-Hold If enabled, the meter will automatically sense and lock the measurement endpoint.
12. Enable
13. Disable (default)
14. Auto-Power Off If enabled, the meter will automatically switch off if no key is pressed within 3 hours.
15. Enable
16. Disable (default)
17. Factory Reset Reset the meter to factory default settings. Note, the meter must be recalibrated.
18. Enable
19. Disable (default)

Setting the Default Option

1. In the measurement mode, press and hold the key to enter the setup menu.
2.  Press the  /  key to select an option, press the Enter key to confirm and switch to the next menu item.
3. Repeat the steps above until the meter returns to the measurement mode.
   To exit the setup menu without saving changes, press the Meas key.

Temperature Compensation
For better accuracy, we recommend the use of either a sensor with a built-in or a separate temperature probe. The meter will calculate the pH slope with measured temperature and show the temperature compensated readings.
Automatic Temperature Compensation
Connect the temperature probe to meter, the ATC icon appears on the display, the meter is now switched to the automatic temperature compensation mode. Refer to the Connecting the Temperature Probe section on page 3.
Manual Temperature Compensation
If the meter does not detect a temperature probe, the degrees Celsius icon (°C) will show on the display indicating the meter is switched to the manual temperature compensation mode. To set the temperature value follow the steps below.

•  Press the °C key to enter the temperature setting.
•  Press the  /  key to modify the temperature value.
•  Press the Enter key to save.

pH Calibration
The 210 meter allows up to 3 points of pH calibration. We recommend that you perform at least 2 points of calibration for high accuracy measurement. The meter will automatically recognize and calibrate to the following standard buffer values.

• USA Standard Buffers    pH 4.01, 7.00, 10.01
• NIST Standard Buffers      pH 4.01, 6.86, 9.18

Single point calibration should only be carried out with a pH of 7.00 or 6.86, otherwise, calibration will not be accepted. Make sure to calibrate the meter when attaching a new pH electrode or during first use. Do not reuse the buffer solutions after calibration, contaminants in the solution will affect the calibration and eventually the accuracy of the measurement. Stir the pH buffer and sample solutions at a uniform rate that will be obtained the most accurate readings.

Setting the Number of Calibration Points

1. Press and hold the key to enter the setup menu.
2.  Press the Enter key, the display shows.
3.  Press the up / down key to select 1 or 2 or 3 points calibration.
4. Press the Enter key until the meter returns to the measurement mode

Single Point Calibration

1. Ensure that the meter is in the pH measurement mode and you have selected 1 point calibration in the setup menu.
2. Press the Call key, the meter shows / or /, depending on the selected pH buffer group
3. Rinse the pH electrode with distilled water, place the electrode (and temperature probe) into the pH 7.00 buffer solution, stir gently to create a homogeneous solution
4. Press the Enter key, the Calibration icon begins flashing.
5. When the reading has stabilized, the meter will show and return to the measurement mode.

Points Calibration

1. Ensure that you have selected 2 points of calibration in the setup menu.
2. Repeat steps 1.2 through 1.4 above. When the first calibration point is completed, the display will show /—-. The meter prompts you to continue with the second point calibration.
3. Rinse the pH electrode with distilled water, place the electrode (and temperature probe) into the next buffer solution (e.g., pH 4.01).
4. Press the Enter key, the meter automatically recognizes the buffer solution and begins the calibration, the Calibration icon continuously flashing.
5. When the reading has stabilized, the display will show electrode slope and. Calibration is completed.

Points Calibration

1. Ensure that you have selected 3 points calibration in the setup menu.  Repeat steps 1.2 through 1.4 above. When the first calibration point is completed, the display will show /. The meter prompts you to continue with the second point calibration.
2.  Rinse the pH electrode with distilled water, place the electrode (and temperature probe) into the pH 4.01 buffer solution, and stir gently.
3.  Press the Enter key, the meter begins calibration, the Calibration icon continuously flashes.
4.  Wait for the reading to stabilize, the display will show electrode slope and / (or / ).
5.  Rinse the pH electrode with distilled water, place the electrode (and temperature probe) into the pH 10.01 (or 9.18) buffer solution, and stir gently.
6.  Press the Enter key, the meter begins the calibration.
7.  Wait for the reading to stabilize, the display will show electrode slope and. Calibration is completed.

• During the calibration, if the display shows —- indicating the meter is waiting for recognizing the pH buffer solution.
• If the display shows indicating the measured mV value for the current calibration point deviates by more than 60 mV from the theoretical value of the pH buffer. The calibration will not be accepted. Please check the pH electrode and ensure the buffer solutions are fresh and uncontaminated.
• If the calculated electrode slope is not between 70% to 110%, the icon will disappear from the display. The pH electrode may need to be replaced.
• To exit the calibration without saving changes, press the Meas key.

Temperature Calibration

The 210 meters are supplied with a temperature probe for measurement and temperature compensation. If the measured temperature reading differs from that of an accurate thermometer, the probe needs to be calibrated.

1. Connect the temperature probe to the meter and place it into a solution with a known accurate temperature.
2.  Press the °C key to enter the temperature setting.
3.  Press the  /  key to modify the temperature value.
4. Press the Enter key to save.

Measurement

pH Measurement

1. Rinse the pH electrode with distilled water. Place the electrode (and temperature probe) 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 Auto-Hold option in the setup menu is enabled, the meter will automatically sense a stable reading and lock measurement, the icon appears on the display. Press the Meas key to resume measuring. If the option is disabled, the meter 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, never wipe the pH-sensitive membrane as this will cause static interference, blot dry with a lint-free tissue to remove waterdrops on the electrode.
• If the meter shows —- indicating the measurement exceeds the range, remove the electrode from the sample immediately.
• If your sample is pure water, low ionic or low conductivity water, we recommend measuring the pH in the smallest sample volume possible or adding 0.3 ml of the 3M KCl to 100 ml of the sample solution. Note, only high purity KCl can be used.

mV Measurement

1. Press the Mode key to switch the meter to mV mode.
2. Rinse the electrode with distilled water. Place the electrode into the sample solution and stir gently. Record the reading when the measurement is stable.

Electrode Maintenance

Cleaning the pH Electrode

Since pH electrode is susceptible to contamination, thoroughly clean as necessary after each use.

1. General Cleaning
   Rinse the pH electrode with distilled water and soak in 3M KCl solution.

2. 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.

3. 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.

4. Protein

5.  Add 1% pepsin to 0.1M HCl solution.

6.  Place the electrode in the above solution for 15 minutes.

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

8. Clogged Liquid Junction

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

10. Place the electrode into the heated solution for 10 minutes.

11. Allow the electrode to cool in an 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.

• Soak the electrode in 0.1M of HCl for 10 minutes.
•  Remove and rinse with distilled water, then place into 0.1M of NaOH for 10 minutes.
•  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 Storing the Electrode

• For best results, always soak the electrode in 3M KCl solution.
• If the 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 a storage solution.

Appendix

Troubleshooting

Fault Cause and Corrective Action

——
Electrode dried out. Soak the electrode in 3M KCl solution at least 30 minutes. Measurement exceeded the maximum range. Check the electrode and sample.
Drifting erratic readings Check whether the electrode is contaminated, clogged or broken.
ERR pH buffer problem. Use a freshly prepared buffer solution to calibrate the meter. The electrode has expired. Replace pH electrode

Optional Accessories

pH Electrodes
Order Code Description
E201-BNC For general purpose applications
E202-BNC For measuring the flat surface samples
P11 For measuring the non-high temperature liquids
P11-LiCl For measuring the non-aqueous samples
P13 For measuring the micro-volume samples
P15 For measuring the low conductivity samples
P16 For measuring the liquids with Tris buffers
P18 For measuring the slurries or soils
P19 For measuring the semisolids
P21 For measuring the colloids
P22 For measuring the high-temperature liquids

Temperature Probe

Order Code Description
TP-10K 3.5 mm jack plug, 1 m (3.3 ft) cable

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-OG Removes oil and grease contaminants, 480 ml
PHCS-PR Removes protein contamination, 480 ml

Power Supply

Order Code Description
DCPA-9V 9V DC power adapter, European standard plug

Meter Specifications

Model Bante 210
pH
Range -1.00 to 15.00 pH
Resolution 0.01 pH
Accuracy ± 0.01 pH
Calibration Points 1 to 3 points
pH Buffer Options
USA (pH 4.01, 7.00, 10.01)
NIST (pH 4.01, 6.86, 9.18)
Temperature Compensation
0 to 100° C (32 to 212° F), manual or
automatic
mV
Range -1999 to 1999 mV
Resolution 1 mV
Accuracy ± 1 mV
Temperature
Range 0 to 105° C (32 to 221° F)
Resolution 0.1° C (0.1° F)
Accuracy ± 1° C (± 1.8° F)
Calibration Point 1 point
Other 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)
Display LCD, 135 × 75 mm (5.3 × 2.9 in.)
Power Requirements 9V/400mA DC power adapter
Auto-Off 3 hours after the last key pressed
Dimensions
210 (L) × 205 (W) × 75 (H) mm,
(8.2 × 8.0 × 2.9 in.)
Weight 1.5 kg (3.3 lb)

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 the product in accordance with local regulations at the collecting point specified for electrical and electronic equipment.

Warranty
The warranty period for the meter is one year from the date of shipment. The 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 meter shall not apply to defects resulting from:

• Improper or inadequate maintenance by the customer
• Unauthorized modification or misuse
• Operation outside of the environmental 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: banteinstruments@yahoo.com
Factory: F3, Building 2, No.2185, Laifang Rd., Shanghai 201615, China Tel: (+86) 21-6404-1598
E-mail: banteinstrument@hotmail.com

References

• Bante Instruments | Professional pH, Ion, Conductivity, Dissolved Oxygen, Turbidity Meters and Lab Equipment Manufacture

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