Bante Instruments 904P User manual

Bante904P Portable Conductivity/DO Meter
Instruction Manual
BANTE INSTRUMENTS CO., LTD

Bante904P Portable Conductivity/DO Meter
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Introduction
Thank you for selecting the Bante904P portable conductivity/dissolved oxygen meter. This manual provides a step-by-step guide to help you operate the
meter, please carefully read the following instructions before use.
Unpacking
Before unpacking, ensure that the current work environment meets following conditions.
•Relative humidity is less than 80%.
•Ambient temperature is greater than 0°Cand less than 60°C.
•No potential electromagnetic interference.
The following list describes the standard components of the meter. After the unpacking, please check all components are complete. If any are damaged or
missing, please contact nearest distributor.
Bante904P Conductivity/DO Meter
CON-1 Conductivity Electrode
DO100 Dissolved Oxygen Probe
TP-10K Temperature Probe
Conductivity Standard Solutions
DO Membrane Cap
DO Electrolyte Solution
Electrode Clip
Carrying Case

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Display
The Bante904P portable conductivity/dissolved oxygen meter is equipped with an easy-read LCD display that used to show the measured values and mode
icons. The following table describes the function of each icon.
INDEX:
Measurement mode icon:
Indicates the meter is in the measurement mode.
Stable icon:
Indicates the measuring value has stabilized.
Calibration mode icon:
Indicates the meter is in the calibration mode.
Hold icon:
Indicates the measuring value has been locked.
Setup mode icon:
Indicates the meter is in the setting mode.
Calibration Due Alarm:
Prompts the user to calibrate the meter.
Memory icon:
Indicates the data is stored into memory.
Automatic Temperature Compensation:
Indicates the temperature compensation is enabled.
Low battery alarm:
When the battery is depleted, the icon will disappear.

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Keypad
KEY
FUNCTION
•Switches the meter ON/OFF.
•Locks the measured value, press the key again to resume measuring.
•Exits the calibration or setting and returns to measurement.
•Toggles between available measurement modes.
•Sets the temperature (Press and hold the key for 3 seconds).
•Starts calibration.
•Enters the setup menu (Press and hold the key for 3 seconds).
•Stores current reading to memory.
•Increase value or scroll up through the menu item.
•Views the calibration report or data logs.
•Decrease value or scroll down through the menu item.
•Confirms the calibration, settings or displayed options.
•Turn on/off the backlight (Press and hold the key for 3 seconds).
Connectors
INDEX:
NO.
CONNECTOR
DESCRIPTION
1
6-pin Connector
Used for connecting the conductivity electrode or dissolved oxygen probe
2
Phone Jack
Used for connecting the temperature probe
3
USB
Used for connecting the USB cable

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Installing the Batteries
•Remove the battery cover from backside of the meter.
•Insert three AA batteries into the battery compartment, note polarity.
•Replace the battery cover into its original position. Installation is completed.
When the batteries are depleted, the meter allows using the DC5V power adapter with USB cable for power supply. NOTE, take out the batteries.
Connecting the Sensors
Take out the electrode from the carrying case.
•Conductivity Electrode or Dissolved Oxygen Probe: insert the connector into the 6-pin connector socket, ensure the connector is fully seated.
•Temperature Probe: insert the connector into to the corresponding connector socket.
After the connection is completed, DO NOT pull on the cable. Always make sure that connector is clean and dry.

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Filling the Electrolyte Solution
1. Take out the electrolyte solution from the carrying case. Unscrew the membrane cap from the buttom of the dissolved oxygen probe.
2. Fill the membrane cap halfway with electrolyte solution.
3. Screw the membrane cap onto the probe, excess electrolyte solution will drain out.
4. Be sure the cathode of probe makes contact with membrane cap, the electrolyte solution in membrane cap should be without an air bubble.
Prior to Use
Remove the protective cap from the bottom of the electrode.
•Conductivity Electrode:
Soak the electrode for a few minutes in tap water to remove dirt and oil stains on the electrode.
•Dissolved Oxygen Probe:
Connect the probe to meter, turn on the meter 10 to 15 minutes and wait for the probe to polarize.
Cathode

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Switching the Meter On and Off
•Press the Meas key to switch on the meter, the display shows the measured value.
•Press and hold the Meas key for 5 seconds, the meter will switch off.
Setup Menu
The Bante904P portable conductivity/dissolved oxygen meter contains an integrated setup menu that is used to customize the displayed option to meet
measurement requirements. In the different modes, the meter will show the corresponding options. The following table describes the functions of the
menu items.
CONDUCTIVITY/TDS/SALINITY/RESISTIVITY MODE:
MENU
DESCRIPTION
OPTIONS
DESCRIPTION
DEFAULT
Cell Constant:
Set the cell constant to match connected electrode.
K=0.1
K=1
K=1
K=10
User-Defined
Temperature Coefficient:
Set the linear temperature compensation coefficient.
Range: 0.0~10.0%/°C
2.10
Calibration Points:
Set the number of calibration points.
1 point
1 point
2 points
3 points
4 points
5 points
Pure Water Coefficient:
When the option is enabled, pure water coefficient
will be applied automatically for ultra-pure water
measurements.
Enable
Disable
Disable
Reference Temperature:
Set the normalization temperature for conductivity
measurement and calibration.
25°C
25°C
20°C
TDS Factor:
Set the default TDS conversion factor.
Range: 0.40~1.00
0.5
Measurement Unit:
Set the default temperature unit.
Degrees Celsius
°C
Degrees Fahrenheit

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DISSOLVED OXYGEN MODE:
MENU
DESCRIPTION
OPTIONS
DESCRIPTION
DEFAULT
Calibration Points:
Set the number of calibration points.
1 point
1 point
2 points
Pressure Coefficient:
Set the barometric pressure coefficient.
Range: 450~850mmHg or
60.0~113.3kPa
760mmHg
Salinity Coefficient:
Set the salinity coefficient.
Range: 0.0~50.0ppt
0.0ppt
Resolution:
Set the resolution of the DO measurement.
0.01mg/L (0.1%)
0.01mg/L
0.1mg/L (1%)
Measurement Unit:
Set the default measurement units.
Degrees Celsius
°C
mg/L
mmHg
Degrees Fahrenheit
mg/L
Milligrams per liter
ppm
Parts per million
mmHg
Pressure unit
kPa
Pressure unit
GENERAL OPTIONS:
MENU
DESCRIPTION
OPTIONS
DESCRIPTION
DEFAULT
Stability Criteria:
When the LO option is enabled, the Stable icon will
quickly appear on the display.
When the HI option is enabled, the icon will take
longer to appear, but guarantees high accuracy of
the measurement.
Low
Low
High
Auto-Hold:
When the option is enabled, the meter will
automatically sense a stable reading and lock the
measurements.
Enable
Disable
Disable
Auto-Power Off:
When the option is enabled, the meter will
automatically turn off if no key is pressed within a
specified time period.
10 minutes
Disable
20 minutes
30 minutes
Disable

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Calibration Due:
When the option is enabled, if the meter does not
calibrated within a specified time period, the meter
will automatically show the icon.
…
1 to 31 days
Disable
Disable
Date and Time:
Set the current date and time.
---
Year-month-day, hour-minutes
Clear Stored Data:
Delete all stored readings in the memory.
Enable
Disable
Disable
Factory Reset:
If enabled, all of the calibration data and selected
parameters will back to factory default settings,
the meter must be recalibrated.
Enable
Disable
Disable
Setting the default option
1.1 Press and hold the key for 3 seconds to enter the setup menu and the or key to select the menu item (e.g., CELL/P-01).
1.2 Press the Enter key, the display shows an option.
1.3 Press the or key to select the desired option.
1.4 Press the Enter key to confirm, the meter returns to the measurement mode. Setting is completed.
If you want to exit the setting, press the Meas key.
Setting the date and time
2.1 Press and hold the key for 3 seconds to enter the setup menu and the or key until the display shows “DATE”.
2.2 Press the Enter key, the meter shows current year (e.g., 2018).
2.3 Press the or key to set year and the Enter key to confirm, the display shows current date and time (Format: month-day, hour-minutes).
2.4 Press the or key to set the date and time, press the Enter key to confirm until the meter returns to the measurement mode. Setting is
completed.
Menu
Page
Option
Menu

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Temperature Compensation
In order to get accurate measuring results, we recommend that using a temperature probe for the calibration and measurements. Note, the dissolved oxygen
probe has a built-in temperature sensor. You do not need to use the supplied temperature probe.
Automatic Temperature Compensation
Connect the temperature probe to the meter (Refer to page 4 “Connecting the Sensors”). The ATC icon immediately appears on the display, the meter is now
switched to the automatic temperature compensation mode.
Manual Temperature Compensation
If the meter does not detect a temperature probe, the °C icon will show on the display indicating that the meter is switched to the manual temperature
compensation mode. To set the temperature value of sample, follow the steps below.
1. Press and hold the oCkey for 3 seconds to enter the temperature setting mode.
2. Press the or key to modify the temperature value.
3. Press the Enter key to confirm.
Press the 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.
Year
Date
Time
ATC

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Selecting the Conductivity Electrode
The Bante904P portable conductivity/dissolved oxygen meter is capable of using the 3 types of conductivity electrodes. Prior to the calibration and
measurement, you need to select the different sensors as per your sample concentration. The table below shows available electrode and its effective
measuring ranges.
CONDUCTIVITY ELECTRODE
MEASURING RANGES
CELL CONSTANT
CON-0.1
0.1~100µ S/cm
K=0.1
CON-1
10µ S/cm~10mS/cm
K=1
CON-10
100µ S/cm~200mS/cm
K=10
Conductivity Calibration - Automatic Calibration
Make sure that you selected the cell constant between 0.1, 1 or 10 in the setup menu. If the current option is “USER”, the automatic calibration function will
be disabled (Refer to chapter SETUP MENU).
The meter allows 1 to 5 points calibration in the automatic calibration mode. To ensure higher accuracy, we recommend that you perform 3 points calibration
or select a standard value close to the sample value you are measuring. The meter will automatically detect these conductivity standard solutions and
prompt the user to calibrate the meter. When the calibration is completed, all new calibration values will automatically override existing data.
The following table shows acceptable conductivity range of standard solution for each measuring range.
MEASURING RANGE
CALIBRATION SOLUTION RANGE
DEFAULT
0~20µ S/cm
7~17µ S/cm
10µ S/cm
20~200µ S/cm
70~170µ S/cm
84µ S/cm
200~2000µ S/cm
700~1700µ S/cm
1413µ S/cm
2~20mS/cm
7~17mS/cm
12.88mS/cm
20~200mS/cm
70~170mS/cm
111.8mS/cm
Single point calibration
1.1 Press the Mode key until the meter shows icon and you have selected 1 point
calibration in the setup menu.
1.2 Rinse the conductivity electrode with distilled water, then rinse with a small amount of standard
solution.
1.3 Press the Cal key, the display shows “CAL1” and waits for recognizing the standard solution.

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1.4 Place the electrode into the conductivity standard solution, the meter automatically shows
current calibration standard (e.g., 1413µ S/cm).
1.5 If necessary, press the or key to set the calibration value.
1.6 Press the Enter key, the Calibration icon begins flashing.
1.7 Wait for the reading to stabilize, the display automatically shows END. Single point calibration
is completed.
Multi-point calibration
2.1 Ensure that you have selected 2 or 5 points calibration in the setup menu.
2.2 Repeat steps 1.2 to 1.6 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 and place the electrode into the standard solution, the display automatically shows current calibration standard (e.g.,12.88mS/cm).
2.4 If necessary, press the or key to set the calibration value.
2.5 Press the Enter key, the Calibration icon begins flashing.
2.6 Wait for the reading to stabilize, the display will show “CAL3”. The meter prompts you to continue with third point calibration.
2.7 Repeat the steps 2.3 and 2.5 above until the meter returns to the measurement mode. Calibration is completed.

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Conductivity Calibration - Manual Calibration
The Bante904P portable conductivity/dissolved oxygen meter provides an easy manual calibration mode. If the conductivity standard solution is not ready,
you are able to use this method for calibration.
3.1 Record the cell constant value on the conductivity electrode (e.g., K=1.01).
3.2 Press and hold the key for 3 seconds to enter the setup menu, the display shows “CELL/P-01”.
3.3 Press the Enter key, the meter enters the setting mode.
3.4 Press the or key until the display shows “User/Cell”, press the Enter key to confirm.
3.5 Press the or key to set each digit according to previous record.
3.6 Press the Enter key to confirm until the setting values stop flashing. The meter returns to the measurement mode. Calibration is completed.

•Performing the conductivity calibration will simultaneously calibrate the corresponding TDS, salinity and resistivity values.
•If you want to exit the calibration, press the Meas key.

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Viewing the conductivity calibration report
4.1 Press the MR key in the measurement mode, the display shows LOC/P-01.
4.2 Press the or key until the display shows ELE/P-02.
4.3 Press the Enter key, the display shows the last calibration date (Format: month-day).
4.4 Press the key, the display shows the calibration point and calibration factor (e.g., K=0.998).
4.5 To exit the calibration report, press the Meas key.

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DO Calibration in % Saturation Mode
The Bante904P portable conductivity/dissolved oxygen meter is able to perform either 1 or 2 points calibration in the dissolved oxygen mode. For single point
calibration, we recommend that you perform 100% saturation calibration in the air-saturated water. If the 2 points calibration is selected, the zero oxygen
solution needs to be used.
Single point calibration - 100% saturation
1.1 Press the Mode key until the meter shows icon and measurement unit “%”.
1.2 Ensure that you have selected 1 point calibration in the setup menu.
1.3 Press the Cal key, the meter shows 100.0%/CAL 1.
1.4 Hold the dissolved oxygen probe in the air at 100% relative humidity or place the probe into the air-saturated water for 15 minutes. Press the Enter
key, the meter begins the calibration, the Calibration icon continuously flashing.
1.5 Wait for the reading to stabilize, the meter automatically shows END. Calibration is completed.
2 points calibration
2.1 Ensure that you have selected 2 point calibration in the setup menu.
2.2 Press the Cal key, the meter shows 100.0%/CAL 1, press the or key until the display shows 0/CAL1.
2.3 Immerse the dissolved oxygen probe into the zero oxygen solution for at least 10 minutes. Press the Enter key, the meter begins the calibration, the
Calibration icon continuously flashing.
2.4 Wait for the reading to stabilize, the display will show “100%/CAL2”, the meter prompts you to continue with second point calibration.
2.5 Immerse the dissolved oxygen probe into the air-saturated water for 15 minutes, press the Enter key to confirm. Wait for the reading to stabilize, the
meter automatically shows END. Calibration is completed.
Performing a percentage saturation calibration will simultaneously calibrate the corresponding mg/L (or ppm) concentration value. Therefore,
additional mg/L calibration is not required in most circumstances.

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DO Calibration in mg/L or ppm Mode
Single point calibration - air-saturated water
1.1 Press the Mode key until the meter shows icon and measurement unit “mg/L or ppm”.
1.2 Ensure that you have selected 1 point calibration in the setup menu.
1.3 Press the Cal key, the meter shows 8.25mg/L/CAL 1 (@25°C).
1.4 Immerse the dissolved oxygen probe into the air-saturated water for 15 minutes. Press the Enter key, the meter begins the calibration, the
Calibration icon continuously flashing.
1.5 Wait for the reading to stabilize, the meter automatically shows END. Calibration is completed.
2 points calibration
2.1 Ensure that you have selected 2 point calibration in the setup menu.
2.2 Press the Cal key, the meter shows 8.25mg/L/CAL 1 (@25°C), press the or key until the display shows 0.00mg/L/CAL1.
2.3 Immerse the dissolved oxygen probe into the zero oxygen solution for at least 10 minutes. Press the Enter key, the meter begins the calibration, the
Calibration icon continuously flashing.
2.4 Wait for the reading to stabilize, the display will show “8.25mg/L/CAL 2”, the meter prompts you to continue with second point calibration.
2.5 Immerse the dissolved oxygen probe into the air-saturated water for 15 minutes, press the Enter key to confirm. Wait for the reading to stabilize, the
meter automatically shows END. Calibration is completed.
If you want to exit the calibration, press the Meas key.

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Temperature Calibration
During the measurement process, if the temperature reading displayed differs from that of an accurate thermometer, the meter needs to be calibrated.
1. Connect the temperature probe to the meter and place into a solution with a known accurate temperature.
2. Press and hold the oCkey for 3 seconds to enter the temperature setting mode.
3. Press the or key to set the temperature value.
4. Press the Enter key to confirm. Calibrating is completed.
During the setting process, press the 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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Conductivity/TDS/Resistivity Measurement
1. Press the Mode key until the meter shows (Conductivity) or (TDS) or (Resistivity) icon.
2. Rinse the conductivity electrode thoroughly with distilled water.
3. Place the electrode into the sample solution, stir the electrode gently.
4. Record the measured value when the reading is stable.
Salinity Measurement
The meter provides two salinity measurement modes - practical salinity (unit: PSU) and natural seawater (unit: ppt).
1. Press the Mode key until the display shows icon and measurement unit “PSU”, the meter enters the practical salinity measurement mode.
2. If necessary, press the Mode key again, the meter shows icon and measurement unit “ppt”, the meter enters the seawater measurement
mode.
3. Select the desired measurement mode. Place the electrode into the sample solution, stir the electrode gently.
4. Record the measured value when the reading is stable.
Dissolved Oxygen Measurement
The meter is suitable for measuring the water, wastewater, brine and other liquids. If the sample is belong to the seawater or other water containing large
amounts of salt, please setting the salinity coefficient before measurement. Some gas and steam such as chloride, sulfur dioxide, sulfureted hydrogen,
ammonium, carbon dioxide and iodin can permeate the membrane via diffusion. So their existence will influence the measurement of dissolved oxygen. If
the sample contains the solvent, grease, sulfide and alga, the membrane on the probe will be blocked, damaged or eroded.
Setting the barometric pressure
The following table describes the relationship between altitude and barometric pressure. Prior to the calibration or measurement, you need to set the
compatible parameter according to the local altitude.
ALTITUDE (m)
kPa
mmHg
ALTITUDE (m)
kPa
mmHg
0
101.3
760
1600
82.9
622
100
100.1
750
1700
81.9
614
200
98.8
741
1800
80.9
607
300
97.6
732
1900
79.9
599
400
96.4
723
2000
78.9
592
500
95.2
714
2100
77.9
584
600
94.0
705
2200
76.9
577
700
92.8
696
2300
76.0
570
800
91.7
688
2400
75.0
563
900
90.5
679
2500
74.1
556
1000
89.4
671
2600
73.2
549
1100
88.3
662
2700
72.3
542
1200
87.2
654
2800
71.4
536
1300
86.1
646
2900
70.5
529
1400
85.0
638
3000
69.6
522
1500
84.0
630
3100
68.7
515

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1. Press and hold the key for 3 seconds to enter the setup menu and the or key until the meter shows PRES/P-02.
2. Press the Enter key, the meter shows the default barometric pressure.
3. Press the or key to set the value, press the Enter key to confirm. Setting is completed.
Setting the salinity coefficient
Salt dissolved in water will influences oxygen content of water. If your sample belong to high concentration liquids, please make sure that you have selected
an applicable salinity coefficient before measurement. For the low concentration liquids, please use the default coefficient 0.0 ppt.
1. Press and hold the key for 3 seconds to enter the setup menu and the or key until the meter shows SAL/P-03.
2. Press the Enter key, the meter shows the default salinity coefficient (0.0 g/L).
3. Press the or key to set the salinity of sample, press the Enter key to confirm. Setting is completed.
Measurement
1. Connect the dissolved oxygen probe to meter and wait for 15 minutes to polarize the probe.
2. If necessary, to set the barometric pressure and salinity coefficient in the setup menu.
3. Immerse the probe in the sample solution, make sure the temperature sensor on the probe is fully immersed.
4. Stir the probe gently. Record the measured value when the reading is stable.
Temperature sensor

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Auto-Hold
The meter contains an Auto-Hold function. If enabled, the meter will automatically sense a stable reading and lock the measurements, the HOLD icon
appears on the display. If disabled, press the key, the meter will immediately lock the displayed value. Press the Meas key to resume measuring.