BANTE Bante920 User manual

Bante920 Benchtop pH/ORP Meter
Instruction Manual
BANTE INSTRUMENTS LIMITED

Bante920 Benchtop pH/ORP Meter
1
Introduction
Thank you for selecting the Bante920 benchtop pH/ORP meter. This manual provides a step-by-step guide to help you operate the meter, please carefully
read the following instructions before use.
UNPACKING THE METER:
Before unpacking, ensure that the current work environment meet following conditions.
●Relative humidity is less than 80%.
●Ambient temperature is greater than 0oC and less than 60oC.
●No potential electromagnetic interference.
The following list describes the standard accessories of the meter. After the unpacking, please check all accessories are complete. If any are damaged or
missing, please contact nearest distributor.
ACCESSORIES:
●pH Electrode
●Temperature Probe
●pH Buffer Pouches (pH4.01/7.00/10.01)
●USB Cable
●DC5V Power Adapter
pH Electrode
Temperature Probe
pH Buffer Pouches
USB Cable
DC5V Power Adapter

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Display
Bante920 benchtop pH meter is equipped with a clear and bright LCD display that used to show measured values, mode indicators and help message. The
following table describes the meaning of each indicator.
INDEX:
Measurement mode indicator:
Indicates meter is in the measurement mode
Electrode slope indicator:
Indicates the average slope of the pH electrode
Calibration mode indicator:
Indicates meter is in the calibration mode
Stable indicator:
Indicates the measured value has stabilized
Setup mode indicator:
Indicates meter is in SETUP mode
Hold indicator:
Indicates the displayed value has been frozen
Memory mode indicator:
Indicates data is stored into memory
Calibration Due Reminder:
Prompts user to calibrate the meter regularly

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Keypad
The meter has a succinct membrane keypad, names and symbols describe the each function key controls.
MEAS|
●Power the meter ON/OFF.
●Freezes the measured value on the display, press the key again to resume measuring.
●In the calibration or temperature setting mode, exits current mode and returns to measurement.
MODE|oC
●Toggles between available measurement modes (pH, mV, ORP).
●Press and hold the key to enter temperature setting mode.
CAL|
●Press the key to enter the calibration mode.
●Press and hold the key to enter the setup menu.
MI|
●Press the key to store current measured value.
●Press key in setup mode to scroll up through menu.
●Press key in temperature setting mode to increase the setting values.
MR|
●Press the key to view calibration report or stored data.
●Press key in setup mode to scroll down through menu.
●Press key in temperature setting mode to decrease the setting values.
ENTER
●Confirms the calibration, setting value or displayed option.
●Press and hold the key to turn On/Off the backlight.

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Connectors
Bante920 benchtop pH meter provides 4 connectors for connecting the various types of sensors. Listed in the below table are the details of these
connectors.
INDEX:
NO.
CONNECTOR
FUNCTION
1
pH/ISE
For connecting the pH or ORP electrode
2
ATC
For connecting the temperature probe
3
REF
For connecting the reference electrode
4
USB/
For connecting the USB cable and DC5V power adapter
Connecting the Electrode Holder
The meter comes with an easy-to-use holder for mounting a variety of sensors and temperature probe. If necessary, please follow the steps below to install
the electrode holder.
1. The base of the electrode holder with an irregular round hole.
2. The electrode arm has a plastic rod.
COND REFpH/ISE DOATC USB/
1
Plastic Rod
2
3
4

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3. Insert the plastic rod into the irregular round hole and swivel the electrode arm 90o. Electrode holder is now ready to swing into desired position.
ADJUSTMENT OF ELECTRODE ARM:
After installation, if the electrode arm automatically rises or falls, you need to adjust the screws until arm locate at any position.
1. Remove the plastic cover from the electrode arm.
2. Use the screwdriver to tighten the screw moderately.
3. Insert the plastic cover to previous position. Installation is completed.
Connecting the Electrode
1. Take out the pH or ORP electrode from the packaging. Follow the steps below to place the electrode into left or right sides of the electrode arm.
2. Insert the BNC connector into the corresponding connector socket. 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.
Screws
A. Insert the electrode
B. Hook up the cord
C. Hook up the cord

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Preparing the pH Buffer Solutions
Bante920 benchtop pH meter 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.
Prior to Use
Remove the protective cap from the bottom of the electrode.
FOR 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.
FOR THE ORP ELECTRODE:
Soak the electrode in 4M KCL solution or tap water for at least 15 minutes.
Power On/Off
●Press MEAS key to turn on the meter, the display shows measured values, mode indicators and help messages.
●Press and hold the MEAS key for 3 seconds, the meter will turn off.
●If you do not press any key within the specified time period, the meter will turn off automatically.
To disable the auto-off function, please read the SETUP MENU section.
……..…. Glass Sensitive Membrane

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Setup Menu
Bante920 benchtop pH meter contains an integrated setup menu that allows you to customize each displayed option to meet measurement requirements. In
the different modes, the meter will show the corresponding options. For the general options, once it is changed that will be applied to all modes.
pH MODE:
PARAMETER
DESCRIPTION
OPTIONS
DESCRIPTION
DEFAULT
pH Buffers:
Select your desired pH buffer group for calibration
and auto-recognition.
USA (1.68, 4.01, 7.00, 10.01, 12.45)
●
NIST (1.68, 4.01, 6.96, 9.18, 12.45)
DIN (1.09, 4.65, 6.79, 9.23, 12.75)
User-Defined Buffer
Calibration Points:
Select the number of calibration points you intend
to calibrate the meter.
1 point
2 points
3 points
●
4 points
5 points
Resolution:
Sets the resolution for pH measurement.
0.001pH
●
0.01pH
0.1pH
Measurement Unit:
Sets the default temperature unit.
Degrees Celsius
●
Degrees Fahrenheit
ORP MODE:
PARAMETER
DESCRIPTION
OPTIONS
DESCRIPTION
DEFAULT
Resolution:
Sets the resolution for ORP measurement.
0.1mV
●
1mV
GENERAL OPTIONS:
PARAMETER
DESCRIPTION
OPTIONS
DESCRIPTION
DEFAULT
Stability Criteria:
Sets the stability criteria for measurement.
When the “LO” option is enabled, measuring value
will stabilize quickly, but reading is less accurate.
When the “HI” option is enabled, measuring value
will stabilize slowly, but guarantees high accuracy.
Low
●
High

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Auto-Hold:
When the auto-hold function is enabled, the meter
will automatically sense a stable end-point reading
and freeze it.
Enable
Disable
●
Auto-Power Off:
When the auto-off power is enabled, if you do not
press any key within a specified time period, the
meter will automatically turn off.
10 minutes
20 minutes
30 minutes
Disable
●
Calibration Due:
When calibration due reminder is enabled, if you do
not recalibrate meter within a specified time period,
the meter will automatically show indicator.
…
1 to 31 days
Disable
●
Date and Time:
Sets the date and time of the meter.
---
---
Clear stored data:
Clear all stored data.
Enable
Disable
●
Reset:
Reset function allows user to restore the meter
back to factory default parameters. When this
function is enabled, all calibration values and
selected parameters will be lost or reset.
Enable
Disable
●
Setting the Default Parameters
1. If necessary, press MODE key until the display shows corresponding mode indicator (e.g., pH mode).
2. Press and hold the key for 3 seconds, the meter enters setup menu, the display shows selectable parameter and page number.

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3. Press or key to scroll through menu, select the parameter you want to set (Refer to Setup Menu section).
4. Press ENTER key to confirm, the display shows an option in the submenu.
5. Press or key to select the desired option.
6. Press ENTER key to confirm, the meter returns to measurement mode. Setting is completed.
EXIT THE SETUP MENU:
During the setup mode, press MEAS key, the meter returns to measurement mode immediately.
…………Parameter
…………Page number
…………Parameter
…………Option

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Setting the Date and Time
Bante920 benchtop pH meter has a real time clock that is used to time-stamp stored measured value and calibration data. Follow the steps below to set
the date and time during the first use.
1. Press and hold the key for 3 seconds to enter the setup menu.
2. Press or key until the display shows “DATE”option.
3. Press ENTER key to confirm, the meter shows current year.
4. Press or key to set the year.
5. Press ENTER key to confirm, the meter shows current date and time.
…………Year
…………Format: Month - Day
…………Format: Hour - Minutes

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6. Press or key to set the date and time.
7. Press ENTER key to confirm, the meter returns to measurement mode. Setting is completed.
Temperature Compensation
In order to get accurate measuring results, you need to enable the manual or automatic temperature compensation before measurement or calibration.
AUTOMATIC TEMPERATURE COMPENSATION:
●Place the temperature probe into the circular hole of electrode arm.
●Insert the connector of temperature probe into corresponding connector socket (Marked “ATC”).
●The “ATC” indicator will show on the display, the meter is now switched to automatic temperature compensation mode.
MANUAL TEMPERATURE COMPENSATION:
1. DO NOT connect the temperature probe to meter.
2. Press and hold the oC key for 3 seconds to enter temperature setting mode.
3. Press or key to set the temperature value of sample.
4. Press ENTER key to confirm, the meter returns to measurement mode. Setting is completed.
In the temperature setting mode, press or key once, the setting value will increase or decrease by 0.1. Press and hold the or key, the
setting value will increase or decrease by 1.

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pH Calibration
Bante920 benchtop pH meter allows up to 5 points calibration in the pH mode. 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 Buffer Options
pH1.68, 4.01, 7.00, 10.01, 12.45
NIST Standard Buffer Options
pH1.68, 4.01, 6.86, 9.18, 12.45
DIN Standard Buffer Options
pH1.09, 4.65, 6.79, 9.23, 12.75
If you selected the user-defined option in the setup menu, the meter will allow only 2 points calibration. Single point calibration should only be carried out
with pH7.00, 6.86 or 6.79, otherwise calibration will not be accepted.
Make sure to calibrate the meter when attaching a new electrode or during first use. 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.
1.3 Press CAL key, the meter shows “pH7.00/CAL” (or “6.86/CAL”, “6.79/CAL”).
1.4 Dip the pH electrode into the pH7.00 (or 6.86, or 6.79) buffer solution, the end of the electrode must be completely immersed into the calibration
solution. Stir the sensor gently to create a homogenous solution.
1.5 Press ENTER key, “Calibration” indicator begins flashing. Wait for the measured value to stabilize, the display shows “END”. The meter returns to
measurement mode automatically. Calibration is completed.


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MULTI-POINT CALIBRATION:
2.1 Make sure that you have selected 2 to 5 points calibration in the setup menu.
2.2 Repeat steps 1.2 to 1.5 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 pH electrode with distilled water. Dip the electrode into the next standard buffer solution (e.g., pH4.01). The meter automatically senses
the current calibration solution and begins calibrating. “Calibration” indicator begins flashing.
2.4 Wait for the measured value to stabilize, the display shows “CAL3”. The meter prompts you to continue with third point calibration.
2.5 Repeat the steps 2.3 until the display shows “END”. The meter returns to measurement mode automatically. Calibration is completed.

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pH CALIBRATION WITH THE USER-DEFINED BUFFERS:
3.1 Make sure that you have selected “USER” option in the setup menu. Custom buffer solution values should be at least 1 pH unit apart from each
other.
3.2 Rinse the pH electrode with distilled water. Dip the electrode into the custom buffer solution. Stir the sensor gently. The meter shows the current
measured value.
3.3 Press or key to increase or decrease displayed value, press ENTER key to confirm. “Calibration” indicator begins flashing.
3.4 Wait for the measured value to stabilize, the display shows “CAL2”. The meter prompts you to continue with second point calibration.
3.5 Rinse the pH electrode with distilled water. Dip the electrode into the next custom buffer solution.
3.6 Press or key to increase or decrease displayed value, press ENTER key to confirm. “Calibration” indicator begins flashing.
3.7 Wait for the measured value to stabilize, the display shows “END”. The meter automatically returns to measurement mode. Calibration is completed.

●During the calibration process, if you want to exit the calibration mode, press MEAS key, the meter will return to measurement mode immediately.
●Electrode indicator shows average slope of the pH electrode after calibration. When the electrode or calibration result does not meet measurement
requirements, the indicator will disappear on the display.

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pH Calibration Report
This program lets you check the parameters of pH electrode for diagnostic purposes.
1. Press MR key in the pH measurement mode, the display shows “LOC/P-01”.
2. Press or key until the meter shows “ELE/P-02” (Electrode Diagnosis).
3. Press ENTER key to confirm, the meter shows the last calibration date (Format: mm-dd).
4. Press key, the meter shows “OFS” (zero-point offset potential).

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5. Press key again, the meter shows the slope of each pH buffer group.
6. After the browsing, press MEAS key to exit the currect mode.
If you are not calibrate the meter or calibration is not successfully, press MR key, the display will show "----" only.
….......Calibration Points
….......Slope

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ORP Calibration
Bante920 benchtop pH meter allows 1 point calibration in the relative mV mode, but calibration is not necessary unless exact readout agreement with a
work standard and at a specific ORP value is needed.
1. Press MODE key until the meter shows indicator.
2. Rinse the ORP electrode with distilled water. Dip the electrode into the calibration solution. Stir the sensor gently.
3. Press CAL key, the meter shows the current measured value.
4. Press or key to set the displayed value, press ENTER key to confirm. “Calibration” indicator begins flashing.
5. Wait for the measured value to stabilize, the display shows “END”. The meter returns measurement mode automatically. Calibration is completed.

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ORP Calibration Report
This program lets you check the millivolt offset in the ORP mode.
1. Press MR key in the ORP measurement mode, the display shows “LOC/P-01”.
2. Press or key until the meter shows “ELE/P-02” (Electrode Diagnosis).
3. Press ENTER key to confirm, the meter shows the last calibration date (Format: mm-dd).
4. Press key, the meter shows “OFS” (Offset Potential).
5. After the browsing, press MEAS key, the meter returns to measurement mode.

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Temperature Calibration
During the measurement, when automatic temperature compensation is enabled, if the temperature reading displayed differs from that of an accurate
thermometer, you need to calibrate the meter.
1. Press and hold the oC key for 3 seconds to enter temperature calibration mode, the display shows current temperature reading.
2. Press or key to set the temperature value.
3. Press ENTER key to confirm. Calibration is completed.