BSW-300 Smart Valve Positioner

Categories: Smart Valve Positioner Series, Automatic Control Valves

Overview

The BSW300 Intelligent Valve Positioner is a smart two-wire field instrument introduced by Lianyungang Boshangde Automatic Control Equipment Co., Ltd. As a control component for pneumatic valves, this positioner is widely used in automatic control systems across industries such as chemicals, petroleum, metallurgy, light industry, and power generation.

This smart valve positioner receives a 4–20 mA valve position signal from the control system and uses A/D conversion to obtain the valve position setpoint; at the same time, it uses a position sensor to determine the actual valve position.
Feedback signal; both signals are processed by the control software to control the operation of the pneumatic actuator, thereby driving the valve position to the set value (as shown in Figure 2-1).

Figure 2-1: Schematic Diagram of the Smart Locator

This intelligent valve positioner is a high-performance device based on microprocessor technology. It effectively overcomes friction and unbalanced forces on the valve plug, thereby improving the response speed of the control valve.
, ensuring rapid and accurate positioning. Not only can it replace traditional electric/pneumatic valve positioners, but it can also be directly connected via the HART protocol to facilitate information exchange with network and control systems. This intelligent valve positioner complies with GB 3836.1-2010 “Explosive Atmospheres—Part 1: General Requirements for Equipment,” GB 3836.4-2010 “Explosive Atmospheres—Part 4: Equipment Protected by Intrinsic Safety,” and GB 3836.20-2010 “Explosive Atmospheres—Part 20: Equipment with Protection Level (EPL) Ga.” Its explosion-proof marking is ExiaHC 4T–T6 Ga, and it is suitable for Zone 0, Zone 1, or Zone 2 environments within plants where explosive mixtures of flammable gases or vapors with air exist, classified as IA–IIC and T1–T16 groups. This product has been tested and approved by a nationally accredited certification body for explosion-proof electrical products and has obtained an explosion-proof certificate of conformity.

Feature Overview

Adaptive Function: Automatically detects the valve's zero point and span, optimizes valve control parameters, and improves control accuracy;

Configuration Functions: Allows you to set valve characteristic curves, operating modes, deadbands, tight shut-off, and event outputs;

Self-diagnostic functions: Displays input current values, up/down travel times, dead zones, etc.;

Safety Valve Positions: Selectable modes include fully open, fully closed, hold, manual, and others;

Communication Features: Communication capabilities based on the HART protocol;

Feedback Functions: 4–20 mA DC valve feedback signals, digital feedback signals.

Features

Positioning accuracy as high as 0.51 TP3TF.S;

It features intrinsically safe explosion protection and offers safe and reliable performance;

It has a simple structure and compact size, and can be mounted on small actuators;

Automatic tuning, automatic diagnostics, and configurable valve characteristic curves;

Fewer mechanical parts and good vibration resistance;

Menu settings can be configured on-site or remotely;

Low power consumption, low air consumption, and low operating costs;

Uses a two-wire 4–20 mA standard signal;

A lightning protection module is optional, reducing the likelihood of the locator being damaged by lightning surges.

Lightning Protection Features

With advances in technology, intelligent valve positioners have gradually evolved toward greater intelligence and bus-based systems. Consequently, the use of highly integrated components has become inevitable, resulting in a decrease in the equipment’s pressure and overcurrent resistance, as well as reduced resistance to lightning strikes. In the event of a lightning strike, these components are easily damaged, causing the positioner to fail. If the associated control valve is used at critical process control points or in locations with high safety requirements, the sudden failure of the positioner could likely result in loss of process control or trigger a production safety incident. Conventional smart valve positioners offer no protection against high currents and overvoltages entering through wires, making them susceptible to damage from lightning strikes and posing a hidden hazard to production safety. To address this shortcoming, the BSW600 smart valve positioner offers an optional lightning protection circuit, enabling it to function as a valve positioner with lightning protection capabilities.

Figure 2-2: Block Diagram of the Principle of a Lightning-Protected Smart Valve Positioner

	1. Lightning protection is not included as standard equipment; it is an optional feature during product selection;
	2. When using a lightning protection locator, grounding must be performed in accordance with relevant national standards;
	3. When the device is equipped with lightning protection, an insulation withstand voltage test must not be performed.

Product Specifications

Technical Specifications

Air Quality Index	Air Supply Pressure	0.14–0.7 MPa
	Valve Leakage Rate	< 0.6 L/h
	Steady-state gas consumption	< 36 L/h
	Air Supply Quality Requirements	In accordance with ISO 8573-1 Maximum particle size and density: Grade 4 Oil Content: Grade 4 Dew point: Class 4 or at least 10 K below the minimum ambient temperature
Input and Output	Adaptive Actuators	Single-acting, double-acting
	Scope of the Trip	Linear stroke: 10–100 mm; angular stroke: 30–120
	Current Input	4–20 mA DC, minimum operating current > 3.8 mA DC; the start and end points of the split-range control are configurable
	Feedback Output	4–20 mA DC
	Switch Input	Dry contacts
	Switch Output	2-Channel Electronic Switch
	Number of Switching Cycles for a Piezoelectric Valve	Average number of fault-free operations > 2 billion
	Output Characteristic Correction	Linear, 1:25, 1:50, N1:25
	Contact Information	HART Communication Protocol
Display Options	Liquid Crystal Display	2-row, 7-digit LCD, dimensions 35 x 22 mm
Display Options	Pressure Gauge Reading	2–3 pressure gauges that display the air pressure at the inlet and outlet
Configuration Operations	Self-tuning	Self-tuning of valve zero point and span, minimum deadband (automatic value)
Configuration Operations	Self-diagnosis	Displays input current values, up/down travel times, and deadband
Accuracy	Dead Zone	0.1–101 TP3T (adjustable)
	Basic Error	≤ ±0.51 TP3TF.S
	Hysteresis	≤0.51 TP3TF.S
Work Environment	Ambient Temperature	Non-intrinsically safe: (-40 to 80) °C
	Ambient Temperature	Intrinsically Safe: T6: (40–50)°C, T5: (40–65)°C, T4: (40–80)°C
	Ambient Humidity	5–95%RH
	Vibration Resistance	15–150 Hz @ 2 g
	Protection Rating	IP65 (based on customer requirements)
	Explosion-Proof Rating	Ex ia IICT4–T6 Ga
Appearance	Weight	3.0 kg
	Dimensions	183 x 96 x 100 mm
	Housing Material	Aluminum Alloy

Installation Instructions

User Guidelines

Please read this manual carefully before installation and commissioning.

I. Safety Icons

To help you make the best use of this manual and to ensure your safety during the commissioning, operation, and maintenance of this instrument, please be aware of the meanings of the following symbols:

Symbol	Slogans	Commentary
	Warning	This warning indicates that if a certain operation or procedure is not performed properly, it may result in personal injury or a safety incident. Please strictly follow the guidelines and proceed with caution.
	Note	If an operation or procedure is not performed correctly, it may result in equipment malfunction or damage. Please strictly follow the guidelines.
	Note	If an operation or procedure is not performed properly, it may indirectly affect the operation of the equipment or trigger an unintended response in a part of the equipment.

II. Safety Precautions

	1. This equipment is designed to meet advanced safety requirements, has passed factory testing, and is safe and effective for operation upon shipment.
	2. This equipment complies with relevant regulations and standards.
	3. The manufacturer of this equipment reserves the right to modify the technical specifications without prior notice.
	4. The permitted storage, transport, and operating temperatures must be observed.
	5. The equipment must be wired in accordance with the wiring diagram.
	6. You must follow the instructions provided on the warning labels, nameplates, and wiring diagrams included with the equipment.
	7. Equipment intended for use in hazardous areas is marked accordingly on its nameplate. When operating equipment in hazardous areas, you must comply with relevant national regulations. You must follow the installation specifications, connection parameters, and safety instructions provided in this Ex explosion-proof documentation.

III. Scope of Application

	1. Any use other than those specified in this manual poses a safety hazard to personnel and the entire equipment system and is strictly prohibited.
	2. The manufacturer shall not be liable for any damage resulting from improper operation or use for purposes other than those specified.

IV. Installation and Commissioning Procedures

	1. This equipment may only be installed, connected, commissioned, and maintained by trained, authorized, and qualified professionals (such as electricians). All work must be performed in full compliance with the guidelines in the User Manual, relevant application standards, and legal and regulatory requirements, and the professionals must hold the appropriate certification (as required by the application conditions).
	2. Before installing this equipment, the installer must read the User Manual, understand its provisions, and comply with them.
	3. When installing this equipment, ensure that the power is turned off and that there are no external loads or stresses.
	4. Unless permitted by the User Manual, do not modify or repair the device.
	5. Repairs to this equipment may only be performed if explicit authorization has been granted and only original equipment parts are used.
	6. If welding operations are being performed near this equipment, do not use this equipment to ground the welding equipment.

Dimensions

BSW600 Smart Valve Positioner Dimensions Diagram

Linear-Travel Mounting Accessories

The feedback rod is mounted on the positioner.

Installation and Connection of Angular Travel Positioners

The installation steps are as follows (see Figure 4.2.3 for the installation and connection of the angular travel positioner)

1. Use the flat washer ①, spring washer ②, and hex head screw ③ to secure the upper bracket block ⑥ to the bottom of the positioning device.

2. Slide the feedback rod ④ onto the positioner's drive shaft and secure it with a set screw.

3. Use flat washers 12, spring washers 11, and hex head screws ⑩ to secure the two lower bracket blocks ⑦ to the actuator.

4. First, screw the hex nut (9) into the base of the fork-shaped feedback rod (8), then attach the fork-shaped feedback
Screw rod ⑧ onto the actuator.

5. Carefully place the positioner, with the mounting bracket attached, onto the actuator so that the cylindrical pin on the feedback rod ④ is correctly inserted into the slot of the fork-shaped feedback rod ⑧. Adjust the positioner’s mounting height, tighten the lock nut on the cylindrical pin of feedback rod ④, and secure the positioner to the actuator using the upper and lower mounting blocks, flat washers 15, spring washers 14, and hex screws 13. Adjust the rotation angle of the feedback rod to meet the requirements specified in Section 4.2.1.

	1. When installing a valve positioner, ensure that the mounting bracket does not block the positioner’s vent hole;
	2. The rotation angle of the feedback rod shall comply with the requirements specified in Section 4.2.1;
	3. When the linear-travel valve is open to 50%, the feedback rod is horizontal.

Air Line Connections

The air connections are located on the right side of the positioner. There are two types of air connections available: G1/4 and 1/4 NPT (please select the appropriate model when ordering). The specific type is marked on the housing, and users can choose the connection that best suits their piping configuration.

Figure 4-7: Pneumatic Connection Diagram

Installation Instructions:

Connect the outlet of the smart valve positioner to the inlet of the pneumatic actuator as shown in Figure 4-7.

To prevent air leaks at the connections, use soapy water to check the airtightness of the joints.

Connect the IN port of the valve positioner to the air supply. The compressed air entering the positioner must be filtered and regulated by an air filter-regulator.

Air Supply Requirements:

The air supply pressure must be between 0.14 and 0.7 MPa; the specific value depends on the actuator;

The air supply must be clean and dry, and must be free of noticeable oil vapors, oil, and other liquids;

The air supply should be free of any noticeable corrosive gases, vapors, or solvents;

Maximum particle size and density in the air supply: Class 4; oil content: Class 4;

The dew point of the process gas supply must be at least 10 K lower than the minimum ambient temperature.

Electrical Connections

Electrical Connection Requirements

Electrical connections must be made strictly in accordance with the wiring diagrams, secured reliably, and must not be loose.

Intrinsically safe positioners must be used in conjunction with associated equipment or intrinsically safe devices that have already been certified as explosion-proof to form an intrinsically safe system before they can be used in explosive gas atmospheres. The system wiring must
You must follow the instructions in the user manuals for both the locator and its associated equipment/intrinsically safe devices; do not connect the terminals incorrectly.

This product comes standard with a waterproof cable connector. The signal cable must have an outer diameter of at least 8 mm, and the connector cap must be securely tightened during installation to prevent a reduction in the product’s IP rating: If
Users who configure cable entry devices on their own must use cable entry devices or seals that are approved by a nationally authorized inspection agency, comply with the provisions of national standard GB/T 4208-2017, and have an enclosure protection rating of at least IP20; only such devices may be used in potentially explosive atmospheres.

There should be no gases at the installation site that could corrode the product's housing.

When installing, using, and maintaining this intrinsically safe positioner, you must strictly comply with both the product manual and the following standards:

GB 3836.13-2013 Explosive Atmospheres—Part 13: Repair, Maintenance, Restoration, and Modification of Equipment;

GB/T 3836.15-2017 Explosive Atmospheres—Part 15: Design, Selection, and Installation of Electrical Equipment;

GB/T 3836.16-2017 Explosive Atmospheres—Part 16: Inspection and Maintenance of Electrical Installations.

Intrinsically Safe Positioner Connection

Input Electrical Connections (as shown in Figure 10)

Type:	Two-wire system
Input Signal:	4–20 mA DC
Minimum operating current:	3.8 mA DC
Input Impedance:	325 Ω, 20 mA DC (without HART)
Input Impedance:	375 Ω, 20 mA DC (HART type)
Intrinsic Safety Parameters (6+ to 7-):	Ui = 28 V DC
	Ii = 93 mA
	Pi = 0.65 W
	Ci = 18 nF
	Li ≈ 0
Safety Barrier Requirements:	U0 ≤ 28 V DC
	I0 ≤ 93 mA
	P0 ≤ 0.65 W
Intrinsic Safety Parameters (3–4):	Uo = 5.36 V DC
	Io = 0.2 mA
	Po = 0.3 mW
	Co = 2 uF
	Lo = 5 mH
Intrinsically Safe Equipment Requirements:	Ui ≥ 5.36 V DC
	Ii ≥ 0.2 mA
	Pi > 0.3 mW
	Ci<2uF
	Li < 5 mH

Figure 4-8: Input Electrical Connection Diagram

The HART handheld communicators provided on-site must be inspected and approved by a nationally recognized certification body for explosion-proof electrical products and must have obtained an explosion-proof certification.

Electrical Connections for the Valve Position Feedback Module (as shown in Figure 4-10)

Feedback Signal Type:	Two-wire system, 4–20 mA DC
Temperature Drift:	≤100 ppm/°C
Scope of Work:	Operating Range: 3.6–20.5 mA DC
Accuracy:	≤0.11 TP3T
Port Voltage:	12–28 V DC
Intrinsic Safety Parameters (11+ to 12-):	Ui = 28 V DC
	Ii = 93 mA
	Pi = 0.65 W
	Ci = 10 nF
	Li ≈ O
Safety Barrier Requirements:	Uo ≤ 28 V DC
	Io ≤ 93 mA
	Po ≤ 0.65 W

Figure 4-10: Electrical Connection Diagram for the Valve Position Feedback Module

Connection of Non-Intrinsically Safe Positioners

Input Electrical Connections (as shown in Figure 4-11)

Type:	Two-wire system
Input Signal:	4–20 mA DC
Minimum operating current:	3.8 mA DC
Input Impedance:	325 Ω, 20 mA (without HART)
Input Impedance:	375 Ω, 20 mA (HART type)

Figure 4-11: Input Electrical Connection Diagram

Debugging Settings

Adjustment Procedures

User Interface Guide

Display:	The LCD is divided into two lines.
Under normal conditions:	Line 1 displays the valve position value.
Under normal conditions:	Line 2 lists, from left to right, the operating status and the input value, respectively.

The positioner can be configured on-site using its three buttons.

The function of the buttons depends on the selected operating mode.

Parameter Settings

If the user needs to change the positioner's parameter settings (normally, the user does not need to change the parameters, as the positioner meets the control requirements), press the button after the positioner is powered on.

Press and hold the button for more than 5 seconds to enter the parameter configuration mode. The user should select parameters based on on-site requirements (see the parameter configuration table for detailed settings). After completing parameter configuration, press

If the key is held down for more than 5 seconds, parameter settings are exited and the system switches to automatic mode.

Automatic Initialization Steps

Display		Factory Default Settings	Unit	Features
Function Symbols	Content	Factory Default Settings	Unit	Features
	WAY ˆ Turn		WAY	Linear Stroke/Angular Stroke
	90 33	33	度	Rated Feedback Angle Conversion Ratio Selector
	OFF
	NO	NO		Initialization (Automatic)
	NO	NO		Initialization (Manual)
	4MA	4MA		Input Current Verification
	riSE FALL	riSE		riSE: Signal 4–20 mA, Output 0%–100% FAAL: 4–20 mA signal, output 100%–0%
	0, 0 to 100, 0	0, 0	%	Set the starting point for the segment range
	0, 0 to 100, 0	100.0	%	Set the End Point for the Leg Range
	Lin 1-25 1-33 1-50 n1-25 n1-33 n1-50	Lin		Setpoint Function Linear Split times: 1:25, 1:33, 1:50 Quick Open 1:25, 1:33, 1:50
	Auto 0, 0 to 10.0	Auto	%	Controller Dead Zone
	0, 0 to 100, 0	0, 0	%	Minimum Travel Distance
	0, 0 to 100, 0	100	%	Maximum Travel Distance
	MPOS FLOW	MPOS		Standardized Control Variables (LED Display) Mechanical Stroke (Actual Value) Flow Rate (0–100)
	riSE FALL	riSE		riSE: Travel range 0%–100%, LCD display value 0%–100% (the signal matches the travel range); FALL; Travel range 0%–100%, LCD display value 100%–0% (the signal matches the LCD display value)
	no up do up do	no		“Tightly Closed” with manual control variable None Only an increase Decrease only Up and Down
	0, 0 to 100, 0	0.5	%	Tightly closed, bottom
	0, 0 to 100, 0	99.5	%	Tightly Closed, Top
	OFF	OFF		Current Calibration Enable Option
	no Strt oCAY	no		”Default Settings (Factory Settings)” "no" Not enabled “Press and hold the ”Strt” button for 5 seconds to restore factory settings. “oCAY” is displayed after the factory settings are successfully configured Note: This preset causes a ”NOINIT” error.”

Selected Parameters

List of Positioner Parameters

Parameter names are shown in both printed text and on-screen display formats. The “Function” column provides a brief description of each parameter’s function, along with its value, physical unit, and factory-set value.

1. YFCT

Actuator Types

Actuator Selection: Linear-travel actuator (WAY)

Angular-Travel Actuator (TURN)

YFCT = WAY. Thus, the nonlinearity resulting from the linear conversion to angular displacement is compensated by the positioner.

2. YAGL

Converting Potentiometer Values Between Positive and Negative:

If 1YFCT=TURN is selected, the rotation angle of the rotary actuator is automatically set to 90 degrees.

If you select 1YFCT=WAY, a linear-travel actuator, you can set the values to 33 or 90, depending on the valve stroke and the mounting distance of the feedback rod pivot.

□ 33 Stroke ≤ 20 mm: For valves that are air-to-open or air-to-close, when performing a manual initialization, the valve begins to operate when air is supplied, and the angle display value should increase from a smaller to a larger value. If the opposite occurs, change it to 90.

□ 90 Stroke > 20 mm: When the valve is air-to-open or air-to-close, and manual initialization is used, the valve begins to operate when air is supplied, and the angle display value should increase from a smaller to a larger value. If the opposite occurs, change the setting to 33.

3. AWAY

4. INIT

Initialization (Automatic)

If you select “strt” and press

If the key is held down (>5 seconds), automatic initialization begins. The initialization process displays “RUN1” through “RUN5”; when the “FINSH” symbol appears, continue pressing

Press the 5S key to exit.

5. INITM

Initialization (Manual)

If you select “Strt” and press the

Key (>5 seconds)

□ When “YENDL” appears, press

Key: Drive the valve to the fully closed position;

□ Tap “

”After that, “YEND2” is displayed";

□ Press “

”Move the control valve to the open position;"

□ Tap “

”After that, the process from “RUN3” to “RUN5”;"

When the “FINSH" symbol appears, continue pressing "

”Press the 5S button to exit."

6. SCUR

Verify the input current value; this option must be enabled in item 47.

7. SDIR

The “Set Value Direction” setting is used to specify the direction in which the setpoint is adjusted. It is primarily used for split-range operations and for actuators that function in the "UP" direction when set to "UP."

8. SPRA

Setting the starting point for stage-by-stage control (see Fig. 1).
See 7.SDIR.

9. SPRE

Setting the starting point for stage-by-stage control (see Fig. 1).

Parameters “7.SPRA” and “8.SPRE,” together with parameter “6.SDIR,” are used to limit the valid setting range. This allows range splitting to be accomplished using characteristic curves.

□ Increase/Decrease

□ Decrease/Increase

□ Down/Down

□ Add/Add

Fig. 1: An example of split-range operation with two instruments

10. TUSP

Set the slope.

The setpoint slope is effective in automatic mode and when limiting the rate of change of the effective setpoint. When the instrument switches from manual to automatic mode, the setpoint slope ensures that the effective setpoint matches the setpoint displayed on the instrument. Seamless switching between manual and automatic modes prevents overpressure in long pipelines. When TS is set to AUTO, the initial double execution time is determined by the setpoint slope.

11. TSDO

12. SFCT

Setpoint Function (see Fig. 2).

Using this feature linearizes the valve's nonlinear characteristics, and any flow characteristic can be simulated on the valve's linearized characteristic curve.

The instrument stores the characteristic curves for two types of valves.

□ Quick-opening equal-percentage valve n1-33 (12SFCT=1-33)

□ Quick-opening equal percentage n1-50 (12SFCT=1-50)

Setpoint inflection points can only be entered when 12SFCT=FREE.

Fig. 2 Setpoint Characteristics, Standard Control Variables, and Shutdown Functions

34. DEBA

Controller Dead Zone

When dEbA = AUto, the deadband typically meets the requirements of the control loop in automatic mode. If, however, gradually increasing the detection deadband range results in oscillations, the deadband used for other range-switching controls is reduced by adjusting the time criterion; this setting is typically a constant.

35. YA

Lower Limit of Operating Variables (see Figs. 2 and 3)

36. YE

Upper Limit of Operating Variables (see Figs. 2 and 3)

Using parameters 35.YA and 36.YE, the mechanical stroke (from stop to stop) is limited to the set value. Using this method, the correct mechanical stroke of the actuator can be restricted to the effective flow range, and the effects of integrator saturation can be avoided.

37.YNRM

Standard Operating Variables (see Figs. 2 and 3)

Using YA and YE, the operating variables are limited to produce two different scale displays (MPOS and FLOW) and provide position feedback via the output current. The MPOS scale indicates mechanical position (0 to 100%); the parameters YA and YE are not valid here. The MPOS scale displays the parameters YA and YE.

The flow scale between YA and YE is standard (0 to 100%). The setpoint W (0 to 100%) is always relative to this range. This results in the display and position feedback JY being more or less proportional to the flow (even when using the valve’s characteristic curve). To calculate the system deviation, the setpoint is also displayed on the corresponding scale.

38.YDIR

Route Direction Display

Used to set the direction of the action (increase or decrease).

Fig. 3 shows an 80-mm linear-stroke actuator, illustrating the relationship between the standard stroke and the YA and YE values.

39. YCLS

The ”Closed-Form Function” of Operational Variables (see Fig. 2)

Using this function, the valve can reach its maximum open position (by keeping the piezoelectric valve contacts energized); the fully closed function can be applied to the positioning of single-output or dual-output actuators. YCLS is activated when the setpoint is less than 0.5% or greater than 99.5%.

When the YA and YE setpoint ranges are set to 0–100%, the action point for the flow-based shut-off function can be set to a lower value using YA and to a higher value using YE.

47. SRTU

Route Direction Display

Input Signal Calibration Enable Option

55. PRST

Presets

Resetting to Factory Settings and Initialization

After presetting, the positioner must be reinitialized, and all calculated maintenance parameters must be reset.

Troubleshooting

Operational Issues and Maintenance

Maintenance and Care

The positioner is a field instrument and should be maintained and serviced regularly. The air supply to the positioner must be kept dry and clean. Periodically drain water and remove contaminants from the pressure regulating valve used in conjunction with the positioner to prevent them from entering the positioner and affecting its normal operation.

The feedback connection components of the positioner may become loose due to prolonged operation; therefore, you should periodically check whether the threads are loose. If any looseness is detected, tighten them immediately and determine whether to perform an initialization based on the magnitude of the deviation at the zero and full-scale positions.

To make it easier to check whether the positioner is operating properly, keep the air supply and the output pressure gauge clean.

Maintenance and servicing of the explosion-proof components of the positioner shall be performed in accordance with relevant national regulations.

Troubleshooting

If you encounter an issue while using the locator, please follow these steps to troubleshoot it.

If the problem is not resolved by following the steps below, please contact the supplier.

Characteristics of Abnormal Conditions	Causes	Solution
The actuator does not operate in either manual or automatic mode.	Low source pressure	Adjust the air supply pressure to the pressure required by the actuator.
	The actuator is stuck	Resolving Issues with a Jammed Actuator
The actuator does not operate or operates slowly in automatic mode	Low source pressure	Adjust the air supply pressure to the pressure required by the actuator.
	The locator exits prematurely during calibration	Re-calibration
Frequent Movement (To Tonify Qi)	Air Leak in the Air Supply System	Check the external air lines for leaks
Frequent Movement (To Tonify Qi)	Air Leak in the Air Supply System	If the positioner has a leak, notify the manufacturer to replace or repair it.
Oscillation	The user menu settings are incorrect	Increase the deadband range and increase the damping value
	The actuator's air chamber volume is too small	Replace the actuator with one that meets the requirements
	Large hysteresis	Check whether the mounting bracket or feedback connector meets the installation requirements; initialize if necessary.
The valve cannot be fully opened or fully closed	The air supply pressure is too low	Adjust the air supply pressure to the pressure required by the actuator.
	Incorrect initialization data	Execute the initialization command
	Limit values have been set	Check User Parameters
	The "Close Tightly" feature is not enabled.	Enable the "Close Tightly" feature in the user settings
No results found	Input signal is too low (<3.6 mA)	Check the input signal
	Loose electrical connection terminals	Tighten the terminal wires
	The motherboard is broken	Replacing the Motherboard
Poor exhaust flow	The vent is blocked	Clean the exhaust vents
Valve-less Position Feedback Current	Valve Position Feedback Module Failure	Replace
	No external power supply; the valve position feedback module has no operating voltage.	Supply the module with a 24V operating voltage
	Reverse polarity of external wiring	Reconnect the wires correctly
The feedback current does not match the actual valve position	Valve Position Feedback Module Failure	Replace
	Valve Position Feedback Module Zero Point and Range Deviation	Adjust the zero and full-scale potentiometers on the feedback module
The zero point and range displayed on the LCD do not match the scale markings.	The actual travel of the control valve does not match the scale.	Manual Calibration

Users must not replace any components that affect explosion-proof functionality on their own, to avoid compromising explosion safety.

Ordering Information

Order Code

BSW-300 □□

Forms of Action	L Linear Stroke
	R Angular Travel

Ordering Information

1. Name, Model Number

2. Attachments

Providing detailed process data and automation documentation will help ensure that you order a product that is more suitable and meets your needs.

BSW-300 Smart Valve Positioner

Product Specifications

Installation Instructions

Debugging Settings

Troubleshooting

Ordering Information

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