BANTE BI-620 Industrial pH Controller User Manual
- June 6, 2024
- BANTE
Table of Contents
BI-620 Industrial pH Controller
USER MANUAL
Overview
Introduction
Thank you for selecting the BI-620 industrial pH controller. This user manual
provides a step-by-step guide to help you operate the meter, please carefully
read the following instructions before use.
Environmental Conditions
Before the installation, ensure that current environmental conditions meet the
following requirements.
- Relative humidity is less than 80%
- Ambient temperature between 5°C (41°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.
BI-620 pH controller
IE-20T industrial pH electrode
pH buffer reagents 4.01, 7.00, 10.01
Installation
Safety Warning
- BI-620 meter shall be installed and operated only in the manner specified in this user manual.
- Only skilled, trained, or authorized person should carry out installation, setup, and operation of the meter
- The rear panel of the meter has two screw terminals for connecting the 24V DC power supply. Make sure to cut off the main power before installation and maintenance.
- Once the power supply cable is connected to the meter, DO NOT touch any screw terminals.
Installing the Meter
1.1 Cut out a square hole approximately 91 × 91 mm (3.58 × 1.58 in.) in the
mounting panel.
1.2 Remove the mounting bracket, place the meter into the square hole.
1.3 Replace the mounting bracket and push the meter forward until it is fully
seated on the mounting plate.
Installing the Electrode
2.1 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.
2.2 Wrap Teflon tape to the electrode body threads.
2.3 Insert the electrode into the mounting position and slowly turn clockwise
until secure. Hand tightens the electrode to prevent liquid leakage.
Selectable Mounting Positions:
- Sidewall mounting (Note: the electrode must be positioned at least 15° up from horizontal)
- Flange mounting
- Pipe mounting
- Immersion mounting
- Top mounting
- Flow cell mounting
Connection
No.
| Terminal|
Description
---|---|---
1| pH (−)| pH/mV input (reference)
2| pH (+)| pH/mV input (measurement)
3| —| No connection
4| —| No connection
5| TC (−)| Temperature input (−)
6| TC (+)| Temperature input (+)
7| 485 (B)| RS485 signal output (B)
8| 485 (A)| RS485 signal output (A)
9| DC 24 (+)| DC 24V (+), linear power supply 1
10
| ****
DC 24 (−)
| DC 24V (−), linear power supply 1
4 to 20 mA analog output
11| GND| Earth ground
12| DC 24 (+)| DC 24V (+), linear power supply 2
13| DC 24 (−)| DC 24V (−), linear power supply 2
---|---|---
14| NC2| Relay resting position (NC2)
15| NO2| Relay working position (NO2)
16| COM2| Relay common (COM2)
17| NC1| Relay resting position (NC1)
18| NO1| Relay working position (NO1)
19| COM1| Relay common (COM1)
20| —| No connection
Meter Overview
Display
Icon|
Description
---|---
Calibration| This indicates that the meter is in the calibration mode
Setup| This indicates that the meter is in the setup mode
**** ATC| This indicates that the automatic temperature compensation is
enabled
ALM1| Indicates the measurement exceeded the high limit
ALM2| Indicates the measurement exceeded the low limit
Keypad
| Key | Function |
|---|
| • Switch the meter on or off
• Press and hold the key to enter the setup menu
• Exit the calibration, settings and return to the measurement mode
| • Start calibration
• Increase value or scroll up the menu items
| • Set the temperature
• Decrease value or scroll down the menu items
| • Toggle between the pH and mV modes
• Confirm the calibration, setting, or displayed option
Meter Setup
The BI-620 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
---|---
| 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
| Temperature Unit
| Degrees Celsius (default)
| Degrees Fahrenheit
| Low Alarm Limit
| Setting range: 0.00 to 14.00 pH (default 4.00 pH)
| High Alarm Limit
| Setting range: 14.00 to 0.00 pH (default 10.00 pH)
| Hysteresis Value
| Setting range: 0.01 to 1.00 pH (default 0.01 pH)
| Analog Output (Low)
| Setting range: 0.00 to 14.00 pH (default 0.00 pH)
| Analog Output (High)
| Setting range: 14.00 to 0.00 pH (default 14.00 pH)
| Factory Reset
Reset the meter to factory default settings. Note, the meter must be
recalibrated.
|
|
| Enable
| Disable (default)
• If the high or low alarm is enabled, the meter will be activated when the measurement exceeds the specified limit.
Note, this option can not enter the same values.
-
If the hysteresis is enabled, the meter will prevent rapid contact switching when the measurement is fluctuating near the set point.
For example, you have set the high alarm at 14.00 pH and hysteresis value at 0.1 pH.
When the measurement overshoots the 14.1 pH, the meter will activate an external device.
When the measurement drops to 13.9 pH, the device will switch off. -
The default RS485 communication is 0 to 14.00 pH corresponds to the 4.00 to 20.00 mA.
Setting a Default Option
-
In the measurement mode, press and hold the key to enter the setup menu.
-
Press the / key to select a menu item, press the Enter key to confirm.
-
Press the / key to select an option or set a value, press the Enter key to save.
To exit the setup menu without saving changes, press the key.
Temperature Compensation
The BI-620 meter is supplied with an industrial pH electrode. When the wires of the electrode are connected to the meter, the display will show the ATC icon immediately. The meter is now switched to the automatic temperature compensation mode.
Temperature Calibration
During the measurement, if the measured temperature reading differs from that
of an accurate thermometer, the electrode needs to be calibrated.
- Place the electrode into a solution with a known accurate temperature.
- 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 BI-620 meter allows up to 3 points 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.
Single Point Calibration
1.1 Ensure that the meter is in the pH measurement mode and you have selected
1 point calibration in the setup menu.
1.2 Press the Cal key, the meter shows/or/, depending on the selected pH
buffer group.
1.3 Rinse the pH electrode with distilled water, place the
electrode into the pH 7.00 buffer solution, stir gently to create a
homogeneous solution.
1.4 Press the Enter key, the meter begins the calibration.
1.5 When the reading has stabilized, the meter will show and return to the measurement mode.
2 Points Calibration
2.1 Ensure that you have selected 2 points calibration in the setup menu.
2.2 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.
2.3 Rinse the pH electrode with distilled water, place the electrode into the next buffer solution (e.g., pH 4.01).
2.4 Press the Enter key, the meter automatically recognizes the buffer solution and begins the calibration.
2.5 When the reading has stabilized, the display will show electrode slope. Calibration is completed.
3 Points Calibration
3.1 Ensure that you have selected 3 points calibration in the setup menu.
3.2 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.
3.3 Rinse the pH electrode with distilled water, place the electrode into the
pH 4.01 buffer solution and stir gently.
3.4 Press the Enter key, the meter begins calibration.
3.5 Wait for the reading to stabilize, the display will show electrode slope
and / (or / ).
3.6 Rinse the pH electrode with distilled water, place the electrode into the
pH 10.01 (or 9.18) buffer solution and stir gently.
3.7 Press the Enter key, the meter begins the calibration.
3.8 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 pH electrode may need to be replaced.
- To exit the calibration without saving changes, press the key.
Measurements
pH Measurement
1.1 Press the key until the display shows measurement unit “pH”.
1.2 Place the electrode into the sample. Wait for the measurement to
stabilize.
mV Measurement
2.1 Press the key to switch the meter to “mV” mode.
2.2 Place the electrode into the sample. Wait for the measurement to
stabilize.
Communication
The BI-620 meter uses a standard Modbus-RTU protocol. All of the data are
character types (2 bytes). The response data ranges between -32767 to 32767,
hexadecimal.
PC Command
Definition| Length of Byte|
Data
---|---|---
ID address| 1| 0 × 01
Command| 1| 0 × 03
Start address| 2| 0 × 0001
Data number| 2| 0 × 0002
CRC16| 2| 0 × 95CB
Meter Response
Definition
| Length of Byte|
Data
---|---|---
ID address| 1| 0 × 01
Command| 1| 0 × 03
Data Length| 1| 0 × 0002
Data| N| 0 × 02 0 × BC
CRC16| 2| 0 × E4DB
- If the response is 01 indicating the command is an error.
- If the response is 02 indicating the address is incorrect.
- If the response is 03 indicating the byte length is incorrect.
Command 03: Read the data from the measurement
Command 04: Read the data from the setting
• ID: 0 × 01 (Fixed)
• 03: Definition
Address:
0 × 0000 – pH/ORP reading
0 × 0001 – Measurement unit (0 × 0001: pH, 0 × 0002: mV) 0 × 0002 –
Temperature (Reading × 0.1)
• 04: Definition
Address:
0 × 0000 – Read the low alarm limit
0 × 0001 – Read the high alarm limit
0 × 0002 – 4.00 mA correspond to pH value
0 × 0003 – 20.00 mA correspond to pH value
For Example (Hexadecimal):
PC send: 01 03 00 00 00 02 C4 0B (Read the pH)
Response: 01 03 02 02 BC B8 95 (700)
PC send: 01 03 00 01 00 02 95 CB (Read the unit)
Response: 01 03 02 00 01 79 84 (pH)
The result will show 7.00 pH (700 × 0.01 pH)
Electrode Maintenance
In order to maintain an accurate measurement, the pH electrode needs cleaning and regular maintenance, cleaning procedure is as follows:
General Cleaning:
Remove the pH electrode from service and rinse the pH-sensitive glass membrane
and the liquid junction with clear water to remove deposits.
If necessary, use a soft-bristled brush to clean the electrode.
Note, DO NOT scratch or break the glass membrane.
Oil or Grease:
Soak the pH electrode in detergent for 30 minutes. Rinse the electrode with
clear water and soak in 3M KCl solution for 1 hour.
Lime or Mineral Deposits:
Soak the pH electrode in 0.1M HCl for 10 minutes. Rinse the electrode with
clear water and soak in 3M KCl solution for 6 hours.
Protein:
Add 1% pepsin to 0.1M HCl solution. Soak the pH electrode in the above
solution for 15 minutes. Rinse the electrode with clear water and soak in 3M
KCl solution for 6 hours.
Bacterial or Mold Growth:
Soak the pH electrode with diluted chlorine bleach. Rinse the electrode with
clean water and soak in 3M KCl solution for 30 minutes.
After cleaning, refer to the pH Calibration section on page 4 to recalibrate the pH electrode.
If you do not use the electrode for long periods, store the electrode in a 3M KCl solution. If this solution is not available, use a 4.01 pH buffer or tap water.
Do not store the pH electrode in distilled or deionized water that will deplete the hydration layer of the pH-sensitive membrane and render the electrode useless.
Appendix
Troubleshooting
Fault|
Cause and Corrective Action
---|---
| Electrode dried out.
Soak the pH electrode in 3M KCl solution for 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.
| pH buffer problem. Use freshly prepared buffer solutions to calibrate the
meter.
| The electrode has expired. Replace pH electrode.
Preparation of pH Buffer Solutions
The BI-620 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.
-
Swirl the volumetric flask gently to dissolve the reagent and fill it to the mark with distilled water.
-
Cap and upend the volumetric flask several times to mix the solution.
Preparation of pH 4.01 and 10.01 buffer solutions is the same as above. Prepared buffer solution should be stored in a hermetically sealed glass container and avoid direct sunlight.
Optional Accessories
| Order Code | Description |
|---|---|
| IE-20T | Industrial pH electrode, 5 m (16 ft) cable |
| PHCS-USA | pH 4.01, 7.00, 10.01 buffer solutions, 480 ml |
| PHCS-ES | Electrode storage solution, 480 ml |
Meter Specifications
| Model | BI-620 |
|---|---|
| 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), automatic
mV|
Range| -1000 to 1000 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
Communication|
Signal Output| 4 to 20 mA
Low or High Alarm| 0.00 to 14.00 pH
Load| 500 ohm
Communication Interface| RS485
Other Specifications|
Operating Temperature| 5 to 50°C 41 to 122°F)
Storage Temperature| 0 to 60°C (32 to 140°F)
Relative Humidity| < 80% (non-condensing)
Display| LCD, 70 × 45 mm (2.9 × 1.7 in.)
Power Requirements| DC 24V
**** Dimensions| 96 (L) × 96 (W) × 75 (H) mm, (3.7 × 3.7 × 2.9 in.)
Weight| 350 g (12.3 oz.)
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 the 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 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: A10, No.2066, Laifang Rd., Shanghai 201615, China
Tel: (+86) 21-6404-1598
E-mail: banteinstrument@hotmail.com
www.bante-china.com
http://bante-china.com/enHome/
The information in this document is subject to change without notice.
Copyright © Bante Instruments Inc, 2022. All rights reserved.