Bante Instruments 820 User manual

Bante 820 Portable Dissolved Oxygen Meter
USER MANUAL
Bante Instruments Inc.

1 IOverview
Introduction
Thank you for selecting the 820 portable dissolved oxygen meter. This
user manual provides a step-by-step guide to help you operate 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.
•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.
1 Electrode clip 4 Electrolyte solution
2 820 meter 5 Dissolved oxygen electrode
3 Membrane cap
Meter Overview
1 Sensor connections 4 Membrane keypad
2 Slot for electrode clip 5 Slot for hand strap
3 Display 6 Battery compartment
7 Socket for dissolved oxygen electrode (6-pin DIN)
8 USB-A interface to the computer or power adapter
Display
Icon
Description
Indicates that the meter is in the measurement mode
Indicates that the meter is in the calibration mode
Indicates that the meter is in the setup mode
Indicates that you are viewing the stored readings or a
reading is stored into the memory
When the battery voltage falls below the minimum power
requirements, the icon automatically disappears
Indicates that the measurement is locked
Indicates that the automatic temperature compensation
is enabled

Overview I2
Keypad
Key
Function
• Switch the meter on or off
•Lock or unlock the measurement
•Exit the calibration, settings, data logs and return
to the measurement mode
• Select the % saturation or mg/L mode
• Press and hold the key to enter the temperature
setting
• Start calibration
• Press and hold the key to enter the setup menu
• Store current reading to memory
• Increase value or scroll up through a list of options
• View the data log or calibration log
• Decrease value or scroll down through a list of
options
• Confirm the calibration or displayed option
• Press and hold the key to switch the backlight on
or off
Installing the Batteries
1. Remove the battery compartment cover from the backside of the
meter, insert three AA batteries into the battery compartment,
note polarity.
2. Replace the battery compartment cover to its original position,
push the limiter until it locks.
The meter allows using the 5V DC power adapter (order code: DCPA-
5V) or the USB port on computer as a power supply.
Note, take out the batteries before connecting an external power
supply.
Installing the Electrode Clip
The electrode clip is designed for mounting a sensor, but it is not a
necessary component for meter. If you want to install this accessory,
insert the electrode clip into the slot on the right of the meter.
Switching the Meter On and Off
•Press the Meas key and release to switch on the meter.
•Press and hold the Meas key to switch off the meter.

3 ISetup
Meter Setup
The 820 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.
Menu Item
Option and Description
Calibration Points
Set the number of calibration points.
1 point (default)
2 points
Pressure Coefficient
Set the barometric pressure coefficient according to
the local altitude (refer to page 4).
450 to 850 mmHg (default 760 mmHg)
60.0 to 113.3 kPa (default 101.3 kPa)
Salinity Coefficient
Set the salinity compensation coefficient of sample.
0.0 to 50.0 ppt (default 0.0 ppt)
Measurement Unit
Set the default temperature unit.
Degrees Celsius (default)
Degrees Fahrenheit
Auto-Hold
If enabled, the meter will automatically sense and
lock the measurement endpoint.
Enable
Disable (default)
Auto-Power Off
If enabled, the meter will automatically switch off
if no key is pressed within 30 minutes.
Enable
Disable (default)
Clear Stored Data
Delete all data logs in the memory.
Enable
Disable (default)
Factory Reset
Reset the meter to factory default settings. Note,
the meter must be recalibrated.
Enable
Disable (default)
Setting a Default Option
1. In the measurement mode, press and hold the key to enter the
setup menu. Press the / key to select a menu item.
2. Press the Enter key, the meter shows the current option.
3. Press the / key to select a desired option. Press the Enter
key to save and return to the measurement mode.
To exit the setup menu without saving changes, press the Meas key.
Menu item
Page number
Option
Menu item

Setup I4
Setting the Barometric Pressure
The table below describes the relationship between the altitude and
barometric pressure, make sure to set a compatible parameter before
the calibration or measurement.
Altitude (m)
kPa
mmHg
0
101.3
760
100
100.1
750
200
98.8
741
300
97.6
732
400
96.4
723
500
95.2
714
600
94.0
705
700
92.8
696
800
91.7
688
900
90.5
679
1000
89.4
671
1100
88.3
662
1200
87.2
654
1300
86.1
646
1400
85.0
638
1500
84.0
630
1600
82.9
622
1700
81.9
614
1800
80.9
607
1900
79.9
599
2000
78.9
592
2100
77.9
584
2200
76.9
577
2300
76.0
570
2400
75.0
563
2500
74.1
556
2600
73.2
549
2700
72.3
542
2800
71.4
536
2900
70.5
529
3000
69.6
522
3100
68.7
515
3200
67.9
509
3300
67.0
502
3400
66.2
496
3500
65.4
490
1. In the measurement mode, press and hold the key to enter the
setup menu.
2. Press the key until the display shows (pressure).
3. Press the Enter key, the meter shows the default pressure unit.
4. If necessary, press the /key to select the "mmHg" or "kPa".
Press the Enter key, the meter shows the default barometric
pressure value.
5. Press the / key to modify the value, press the Enter key to
save.
During the setting process, press the / key once, the setting
value will increase or decrease by 0.1. Press and hold the / key,
the setting value will increase or decrease by 1.

5 ICalibration
Prior to Use
Filling the Electrolyte Solution
1.1 Take out the dissolved oxygen electrode from the carrying case.
Unscrew the membrane cap from the bottom of the electrode,
rinse the inside and outside with distilled water and blot dry.
1.2 Fill the membrane cap halfway with electrolyte solution.
1.3 Screw membrane cap back onto the electrode. Some electrolyte
solution will overflow during this process.
1.4 Check the electrode, ensure that no air bubbles are trapped in the
electrolyte solution and membrane is not creased or damaged.
Polarizing the Electrode
2.1 Insert the connector of the dissolved oxygen electrode into the
connector socket on meter, ensure that the connector is fully
seated.
2.2 Switch on the meter and wait 10 minutes for the electrode to
polarize.
Dissolved Oxygen Calibration
The 820 meter allows 1 or 2 points dissolved oxygen calibration. If you
have selected the single point calibration in the setup menu, we
recommend that you perform a 100% saturation calibration in the.
air-saturated water. If the 2 points calibration is selected, the zero.
oxygen solution needs to be used.
Note: During the calibration and measurement, the temperature sensor
on electrode must be immersed in the sample solution completely, the
solution should keep 0.3 m/s of minimum flow rate to avoid oxygen
starvation at the membrane.
DO Calibration in mg/L Mode
1.1 Press the Mode key to enter the dissolved oxygen concentration
mode and select the 1 point calibration in the setup menu.
1.2 Press the Cal key, the display shows 8.26 mg/L / CAL1 (@25° C).
1.3 Place the dissolved oxygen electrode into the air-saturated water
for 10 minutes and stir gently. Press the Enter key, the meter
begins the calibration, the Calibration icon continuously flashing.
1.4 When the reading has stabilized, the meter will show and
return to the measurement mode.
Temperature sensor
Remove air bubbles

Calibration I6
2 Points Calibration
2.1 Ensure that you have selected 2 points calibration in the setup
menu.
2.2 Press the Cal key and key, the meter shows 0.00 mg/L/ CAL1.
2.3 Place the dissolved oxygen electrode into the zero oxygen solution
for about 10 minutes and stir gently. Press the Enter key to begin
the calibration.
2.4 When the reading has stabilized, the display will show 8.26 mg/L
/ CAL 2 (@25° C). The meter prompts you to continue with second
point calibration.
2.5 Repeat the step 1.3 above until the meter shows .
Calibration is completed.
DO Calibration in % Saturation Mode
3.1 Press the Mode key to enter the % saturation mode and select
the 1 point calibration in the setup menu.
3.2 Press the Cal key, the display shows 100.0% /CAL1.
3.3 Hold the dissolved oxygen electrode in the air at 100% relative
humidity or place the electrode into the air-saturated water for
10 minutes. Press the Enter key, the meter begins the calibration.
3.4 When the reading has stabilized, the meter will show and
return to the measurement mode.
2 Points Calibration
4.1 Ensure that you have selected 2 points calibration in the setup
menu.
4.2 Press the Cal key and the key, the meter shows 0.0%/CAL1.
4.3 Place the electrode into the zero oxygen solution for 10 minutes
and stir gently. Press the Enter key to begin the calibration.
4.4 When the reading has stabilized, the display will show 100.0%
/ CAL2. The meter prompts you to continue with second point
calibration.
4.5 Repeat the step 3.3 above until the meter shows .
Calibration is completed.
To exit the calibration without saving changes, press the Meas key.
Temperature Calibration
1. Place the dissolved oxygen electrode into a solution with a known
accurate temperature.
2. Press and hold the °Ckey to enter the temperature setting.
3. Press the / key to modify the temperature value.
4. Press the Enter key to save.

7 IMeasurement
Measurement
The 820 meter can be used to measure the water, wastewater, brine
and other liquids. If your sample is seawater or water containing large
amounts of salt, make sure to set the salinity coefficient before
measurement. Some gas and steam such as chloride, sulfur dioxide,
sulfureted hydrogen and carbon dioxide can permeate the membrane
via diffusion. Their existence will influence the measurements. If the
sample contains solvent, grease, sulfide and alga, the membrane will
be damaged or eroded.
1. Set the barometric pressure and salinity coefficient in the setup
menu.
2. Rinse the electrode with distilled water, place the electrode into
the sample solution and stir gently.
3. If the Auto-Hold option in the setup menu is enabled, the meter
will automatically lock the measurementendpoint and show HOLD
icon. Press the Meas key to resume measuring.
If the option is disabled, the meter will continuously measure and
update the readings.
4. Wait for the measurement to stabilize and record the reading.
5. When all of the samples have been measured, rinse the electrode
with distilled water.
If the meter shows ---- indicating the measurement exceeds the range,
remove the electrode from the sample solution immediately.
Data Management
The 820 meter is capable of storing and recalling up to 100 data sets.
Storing a Measurement Result
In the measurement process, press the MI key to store the reading
into the memory, the Memory icon appears on the display.
Viewing the Data Logs
1.1 Press the MR key in the measurement mode, the meter shows
the serial number of the stored data.
1.2 Press the key to view the stored data.
1.3 Press the key to view the next data set.
1.4 To exit the data log, press the Meas key.
Serial number

Data Management I8
If the meter does not store any reading, the display will show ---- only.
Clearing the Data Logs
If the memory is full, the meter will show when the MI key
is pressed. To delete the data logs, please follow the steps below.
2.1 Press and hold the key to enter the setup menu.
2.2 Press the key until the meter shows /.
2.3 Press the Enter key, the meter shows /.
2.4 Press the key to select the /.
2.5 Press the Enter key to confirm.
Communication
The 820 meter can transfer the data to a computer or import the data
to Excel by a DAS software. You are able to download this software
from our official website.
Before installation, make sure that the Windows 10 operating system
has been installed on your computer and you have a USB-B2303 data
cable.
Receiving the Data
1. Connect the black port of the data cable to meter and the blue
port to computer.
2. Click the DAS _ECO _Series icon, the system automatically
scans an available communication port and shows a message
box "Found a port on your computer".
3. Click the OK, the application starts.
4. Click the Connect, the screen shows "Port is connected".
5. Click the OK, then click the Receive, the stored data will transfer
to computer automatically.
If your computer can not find a communication port, click the "PL2303
_Prolific_DriverInstaller_v1190.exe" to update the drive program.
Creating an Excel File
When transfer is completed, click the Save as Excel, the readings
in data sheet will automatically convert to Excel file.
Note, once the software is closed, all received data will be lost and
can not be recovered.
Black port
Blue port

9IAppendix
Electrode Maintenance
•Rinse the dissolved oxygen electrode thoroughly with distilled
water after use.
•Do not touch the membrane and always keep it is clean and wet.
•If you do not use the electrode for long periods, screw off the
membrane cap, rinse the electrode anode, cathode, membrane
cap with distilled water and blot dry. Install the electrode and
store dry.
Cathode Anode
Appendix
Optional Accessories
Dissolved Oxygen Electrode and Components
Order Code
Description
DO100
Dissolved oxygen electrode, range: 0 to 20 mg/L
DO-MEM
Membrane cap, 2 PCS/set
Solution
Order Code
Description
DO-ES
Electrolyte solution, 480 ml
Communication and Power Supply
Order Code
Description
USB-2303A
USB connector A to A, 1 m (3.3 ft) cable
DCPA-5V
5V DC power adapter, european standard plug
Preparation of Zero Oxygen Solution
Dissolve 500 mg of the sodium sulfate (Na2SO3) reagent and a small
amount of cobalt (II) chloride hexahydrate (CoCl2•6H2O) in the 250 ml
distilled water, mix the solution until reagent is completely dissolved.
Preparation of Air-Saturated Water
Use an air-pump to blow air into distilled water at least 1 hour, while
stirring the solution.
Meter Specifications
Model
Bante 820
Dissolved Oxygen
Range
0.00 to 20.00 mg/L
Resolution
0.01 mg/L
Accuracy
± 0.5 mg/L
Calibration Point
1 or 2 points
Temperature Compensation
0 to 50° C (32 to 122° F), automatic
Barometric Pressure
Correction
450 to 850 mmHg, 60.0 to 113.3 kPa,
manual
Salinity Correction
0.0 to 50.0 ppt, manual
% Saturation
Range
0.0 to 200.0%
Resolution
0.1%
Accuracy
± 2.0%
Other Specifications
Memory
100 data sets
Communication Interface
USB-A
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, 80 × 60 mm (3.15 × 2.36 in.)
Power Requirements
3 × 1.5V AA alkaline batteries or
5V DC power adapter
Auto-Off
30 minutes after last key pressed
Dimensions
170 (L) × 85 (W) × 30 (H) mm,
(6.69 × 3.35 × 1.18 in.)
Weight
300 g (10.5 oz.)
Troubleshooting
Fault
Cause and Corrective Action
Dissolved oxygen electrode does not connect to the
meter or measured value is out of range.
Drifting erratic
readings
Check whether the membrane cap is contaminated
or the electrolyte solution is depleted.
Electrode is broken.
Replace the dissolved oxygen electrode.
Keypad is not
working
Replace the batteries.

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 meter is one year from the date of shipment.
Above warranty does not cover the electrode and electrolyte solution.
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 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