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CONTENTS

1 INTRODUCTION.....................................................................................1

1.1 Technical Notes.................................................................................................... 1 1.2 Technical Parameters.......................................................................................... 1 1.3 System Components............................................................................................ 2

2 INSTALLATION.......................................................................................3

2.1 Installation Conditions .............................................................................................. 3

3 OPERATION.............................................................................................4

3.1 Preparatory Work before Boot................................................................................ 4 3.2 Boot Steps................................................................................................................... 4 3.3 Instrument Panel operating Instructions ................................................................ 5

4 TROUBLESHOOTING ...........................................................................6

4.1 Blackout、Gas Stop.................................................................................................. 6 4.2 No Working of Pneumatic actuator....................................................................... 6 4.3 No Working of Level-Measuring Floater Components ........................................ 7

5 SYSTEM MAINTENANCE ....................................................................7

5.1 Level Measuring Device maintenance................................................................. 7 5.2 Pneumatic actuator Maintenance........................................................................ 7 5.3 Operating Panel Maintenance .............................................................................. 7

ANNEX I: DIGITAL TABLE PARAMETERS MANUAL....................9

1 PANEL DESCRIPTION.........................................................................11

2 DISPLAY AND EXPLANATION .......................................................12

2.1 Display when power-on ......................................................................................... 12 2.2 Parameter Safety Protection................................................................................. 12 2.3 Mode Selection ....................................................................................................... 12 2.4 Parameters Setting Flow Chart ............................................................................. 13

3 PARAMETER-SETTING FORM ......................................................15

3.1 LEVEL1 Mode（High-Level Parameter） ............................................................. 15

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3.2 LEVEL2 Mode (Second-Grade Parameter） ...................................................... 15

4 PARAMETERS’ TABLE .....................................................................17

4.1 Table for input signals ............................................................................................. 17 4.2 Table for units ........................................................................................................... 17 4.3 Maintenance and Troubleshooting ..................................................................... 17

ANNEX II SUB-CONTROLLER PARAMETERS MANUAL...........19

1 PANEL DISPLAY DESCRIPTIONS....................................................21

2 DISPLAY AND DESCRIPTION OF SCREEN ................................23

2.1 Boot Show................................................................................................................. 23 2.2 Parameters Setting Flow Chart ............................................................................. 23

3 PARAMETER-SETTING FORM ......................................................24

4 DETAIL OF FUNCTIONS AND OPERATIONS.............................26

4.1 Parameter safety protection................................................................................. 26 4.2 Manual State and Auto State ............................................................................... 27 4.3 Valve Position Feedback Adjustment.................................................................. 28 4.4 Maintenance and Troubleshooting ..................................................................... 29

ANNEX 3 GUIDE OF SPARE PARTS NO. ...........................................31

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7. Relative Humidity：<85％

8. Power：220VAC meter power

1.3 System Components

Flotation level automatic control system is shown as Fig 1.1. The system is mainly

composed of three parts, which are level measuring device, level controller and pneumatic

regulating valve. Pneumatic regulating valve includes pneumatic actuator, dart valve and

stem. The level controller regulates pneumatic regulating valve according to the

comparison between the value of level measuring instrument outputted and the level setting

value, and realizes the level of automatic adjustment.

Fig 1.1 Flotation-Level Automatic Control System Block Diagram

In the fig 1.1, level measuring device is composed of special level measuring

instrument, measuring support, floating component and sprinkler and so on. The measuring

device submits the signal of 4~20mA; Sub-Controller is installed in the field operating

panel to receive the input signal of measuring instrument. Main controller outputs the

control signal according to the level setting value, driving pneumatic.

液位控制器 Level Controller

液位测量装置 Level measuring instrument

矿浆

Pulp

气动执行器

Pneumatic actuator

矿浆

Pulp

矿浆

Pulp

锥阀 Dart Valve

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1 Introduction

Flotation Level Automatic Control System is composed of special flotation level

measuring device, pneumatic regulating valve and controller. It is used to control every

flotation bank’s level automatically to ensure process stable, improve concentrate grade and

recovery rate and meet the demands of process indicators.

1.1 Technical Notes

The technical features of flotation level automatic control system are as follows:

1. Specially designed level measuring device can obstruct effectively the impact of pulp

bubble to level measurement, and ensure to measure the pulp level accurately and reliably. The

level measuring device has sprinkler, cleaning floating component, which can ensure its work

reliable and long-term.

2. It takes indirectly method to measure pulp level by laser measuring instrument and

floating component. It is by stainless steel cover that Laser measuring instrument is

encapsulated with high corrosion-resistant and long-life.

3. After years of research and useing, special-designed pneumatic regulating valve can

regulate the pulp level of every floatation bank excellently. Pneumatic regulating valve uses

the unique-designed dart valve, which improves the reliability of pneumatic regulating valve’s

work. Moreover, pneumatic actuator is specially designed and developed for the floatation

level controlling. Therefore, overall performance is better than similar products at home and

abroad.

1.2 Technical Parameters

1. Measuring Range：0 ~ 500 mm

2. Measuring Accuracy：better than ±1.0% full-range

3. Control Signals,：4~20 mA DC

4. The Input Signal of the Electro-Pneumatic Valve Positioner：4~20mA DC

5. The Output Signal of Level ：4~20mA DC

6. The Working Environment Temperature：0~50 °C

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2 Installation

Level measuring device is installed on the flotation cell. The operating panel is

installed beside intermediate (tail) box, close to the level measuring device. Pneumatic

actuator is installed on the intermediate (tail) box, and it realize the level automatic control

with the help of pneumatic regulating valve. Please see Level Control System Installation

Manual for further details.

2.1 Installation Conditions

2.1.1 Power Supply requirement

1. Load: satisfy the continuous high load, 24hours/day, 330days/year.

2. Power Supply: Instrument Power AC 220V, Frequency 50Hz

3. Power: The capacity of every Field Panel: 1A

The capacity of PLC control cabinet: 5A

2.1.1 Gas Supply requirement

1. Work pressure：0.6~0.7MPa

2. Air Consumption : 3600L/h （Each pneumatic actuator）

3. Gas-source Temperature: Dry Gas Purification under working pressure is at

least 10℃ lower than the lowest ambient temperature

4. Oil Content: Not more than 8mg/m3

5. Dust Content：0.1g/ m3, Particle size is not greater than 10μm

6. Gas-Supply Pipe: DN15 galvanized pipe

7. The gas-supply should set up a filtering and reducing device

8. Instrument gas-source is supplied near the pneumatic regulating valve, and the

connecting pipe is no longer than 1 meter.

2.1.1 Water-Supply requirement

1. Water-Supply Pressure: 0.01MPa

2. Water-Supply Flow : 1.0m3/h

3. It connects by rubber pipe between rinsing source and sprinkler.

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3 Operation

3.1 Preparatory Work before Boot

1. Check whether the cable plug of pulp level measuring device is firm

2. Check whether the floating components are clean.

3. Check whether the sprinkler is normal.

4. Check whether the gas-supply hand valve and every component for gas supply

pipeline are normal.

5. The Manual / automatic ball valve of pneumatic actuator should be closed.

6. Hand wheel’s screw rod should be separated from the cylinder piston stem, and

returned in sleeve completely.

7. Check whether the signal cables and power cable connect correctly. Refer to

external wiring drawing.

8. Check whether the external wiring of PLC control cabinet is correct.

3.2 Boot Steps

1. Open the air-supply hand valve, and observe the manometer which should indicate

0.5MPa. If deviation, the knob in the upper part of the filter and reducing valve

should be took up and rotated clockwise/anticlockwise to adjust the air pressure to

the value of 0.5 MPa.

2. Put on the switch of field operating panel and observe the servo manual operated

instrument.

3. The digital indicator perform a power-on-self-test, then enter into the normal

operating (or the initial state).

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3.3 Instrument Panel operating Instructions

3.3.1 Instrument Panel Description

1. Pulp Level indicating Instrument

Indicates the value of flotation pulp level, range: 0-500mm, which is inputted

via level measuring instrument

2. Servo manual operated instrument

The A/M on the servo manual operated instrument panel means manual /

automatic switch key. When indicator light of MAN is on, spot-manual control

can be conducted, and dart valve can be controlled via ▲ and ▼ key. SV shows

the manual output value. When indicator light of MAN is out, It is controlled by

remote PLC. SV shows the output value given by remote PLC , and MV shows

feedback value of pneumatic actuator.

3.3.2 Manual Operation

After self-test, sub-controller enters into manual control mode. When the MAN

indicator light is on, it can regulate the opening of pneumatic actuator through

pressing ▲or▼ key. To prevent over-tune, resulting in excessive fluctuations in the

level, the output value should change subsection and slowly

3.3.3 Automatic Regulation

After pulp level is stabled, it can be changed to remote control mode and input

the level setting value of flotation bank. Then it can be changed to the automatic

mode, PLC controller will compare and calculate according to level measuring

value and level setting value to self-regulate the output of pneumatic actuator,

which keep invariableness of pulp level. At auto control mode, if pulp inlet was in a

large fluctuation, it would be disorder easily for level automatic system and be fall

short of control precision. It suggests that it should be changed to manual mode.

After level was stable, it can be changed to auto mode again.

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4 Troubleshooting

4.1 Blackout、Gas Stop

When the power is out, the sub-controller does not have output signal (4mA), and

then the pneumatic regulating valve will be back to original position. After power-on, the

output of sub-controller is zero (4mA), so level need to be regulated manually over again.

After the level is in stable, it will be switched into automatic mode.

When gas supply stops in the state of field manual mode or remote manual mode,

pneumatic regulating valve would be automatically locked to the current position. If in

the state of automatic mode, it should be switched into the field manual mode or remote

manual mode. After restoration of gas supply, it should manually regulate the dart valve

into suitable position once again. After level is in stable, it can enter into the auto mode.

4.2 No Working of Pneumatic actuator

Firstly, check whether the gas supply is working. If gas-supply stops, it can just

operate as 4.1; if gas supply is working, it need to check whether the output of controller is

working as follow steps: enter into the field manual mode, and then regulate the pneumatic

actuator via sub-controllers. If the pneumatic actuator doesn’t work, it need to close the

gas-supply valve, open the ball valve of pneumatic actuator, and connect the hand wheel

screw and the piston rod of pneumatic actuator well, and then regulate the level via

sub-controller.

If you meet such problem, please contact with us as soon as possible. We will send

an engineer to deal with this problem timely on spot.

Attention: the problem is uncommon. Do not use the hand wheel of the

pneumatic actuator usually! Before using the hand wheel, lubricant should be added

on the hand wheel screw!

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damage. The parameters do not modify it at random. After using, close and lock the outside

door of the field operating panel to prevent corrosive gases and dust from being into the

operating panel and even causing electrical fault.

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Annex I: Digital Table Parameters Manual

EN6000B3 Digital Table

Parameters Manual

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Contents

1 PANEL DESCRIPTION ........................................................................ 11

2 DISPLAY AND EXPLANATION....................................................... 12

2.1 DISPLAY WHEN POWER-ON 12 2.2 PARAMETER SAFETY PROTECTION 12 2.3 MODE SELECTION 12 2.4 PARAMETERS SETTING FLOW CHART 13

3 PARAMETER-SETTING FORM...................................................... 15

3.1 LEVEL1 MODE（HIGH-LEVEL PARAMETER） 15 3.2 LEVEL2 MODE (SECOND-GRADE PARAMETER） 15

4 PARAMETERS’ TABLE ..................................................................... 17

4.1 TABLE FOR INPUT SIGNALS 17 4.2 TABLE FOR UNITS 17 4.3 MAINTENANCE AND TROUBLESHOOTING 17

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1 Panel Description

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2 Display and explanation

2.1 Display when power-on

To connect the signal cables and power cables, refer to terminal wiring diagram. Turn

on the power supply only after the wiring has been checked and tested. The instrument will

perform a power-on self-test for 1 second and then display the hardware configuration

information. It will then enter the normal operating state (or the initial state). The display

procedure is shown as follows:

2.2 Parameter Safety Protection

In the normal operating state, press and together and hold for 2 second,

then enter the setup mode for parameter safety protection. Repeating the same operation

will return the normal operating state.

2.3 Mode Selection

In the normal operating state, Press for 2 sec to enter the mode selection menu. Then,

press or to select different operation modes, such as LEVEL1 mode, LEVEL2

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mode and TIME mode.

2.4 Parameters Setting Flow Chart

In the mode selection menu, if parameter protection is not set(refer to section

2.2-Parameter safety protection), you may press once to enter the parameter setup state.

Under the display of one parameter, you may press or to increase or decrease

the setting value of the parameter (refer to section 3-Parameter table for its range).

Continued pressing of or brings a rapid increase or decrease of the value.

Then press again to ensure the modification of the parameter value and enter the

next parameter. Here the function of key is similar to that of the key. Press the

key once to move the display a step forward. Alternatively, press key once to

move the display a step backward. Continued pressing of or brings rapid

display movement. For the last parameter of this mode, press the key once to return

the mode selection menu and then press again for another 2 sec to return the normal

operating state. The instrument will then run the new parameters.

Note: If no keys are pressed for 120 seconds, the display moves backward step by

step automatically, from parameter setup state, to mode selection, to the normal

operating state.

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3 Parameter-Setting Form

3.1 LEVEL1 Mode（High-Level Parameter）

3.2 LEVEL2 Mode (Second-Grade Parameter）

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Code Name Descriptions Range Setting

Input in CH1 Select the input type for CH1

(channel 1). See section 4.1-Table for input signals.

0~31

24

Position of decimal point of CH1

Define the position of decimal point .

0

0.0

0.00

0.000

0

CH1 low range The parameter defines the low range -1999~9999 0

CH1 high range The parameter defines the high

range -1999~9999 600

CH1 filter time Low-pass filter time constant for CH1.If the control variable is a slow-changing physical variable, such as temperature, water level, etc, the filter effect is significant. The greater the value of FT1, the more significant the filter effect will be, but the slower will be the response speed of the measured value. Setting FT1=0 cancels the filter effect.

0~20 0

CH1 input offset This offset value is used to modify the actual measured PV input value in CH1.Actual PV +offset value=modified PV. The initial offset value has been set to 0,but the user can adjust it.

-1999~9999 0

RETR1 channel Select the channel to be transmitted: NULL：no retransmission CH1：CH1 retransmission CH2: CH2 retransmission

NULL

CH1

CH2

CH1

RETR1 current Set the retransmission current range for RETR1 and RETR2

0~10

4~20

0~20

4~20

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4 Parameters’ Table

4.1 Table for input signals

4.2 Table for units

4.3 Maintenance and Troubleshooting

This instrument does not need special maintenance. Measurement errors will not

increase even after extensive use. Appropriately adjust the relay contact output control

cycle time and ON/OFF alarm hysteresis to avoid switching ON/OFF frequently. If signal

exceeds the relay contact capacity, use an auxiliary relay to execute ON/OFF control. For

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inductive loads, externally connect a RC snubber or MOV transient/surge absorber.

General troubleshooting：

Trouble Cause Solution

PV display is

wrong

1． The ordered product model is not the

one the user needs.

2． The input signal code doesn’t match

actual input signal.

3． The wiring of the input signal is

incorrect.

1． Check model code.

2． Check input parameter

setting.

3． Correct the wrong wiring.

No display 1．Power supply has failed.

2．The instrument is damaged

1. Check power supply wiring

2. Replace the instrument.

The keys are

disabled

1．The keys are locked.

2．The keys are damaged.

1．Unlock the keys.

2．Check or replace the

instrument.

Error code

instruction

See “Error code”

Error Code:

Error code Trouble Cause Solution

Over the high

range

1． The input signal has exceeded

the input high range by 10%.

2． Wrong input connection.

Under the low

range

1． The input signal is less than

the input low range by 10%.

2． Wrong input connection.

1．Check input signal

and its parameter

setting.

2．Check input

connection.

3．Check connection

Sensor

break/open

1． Thermocouple input break.

2．Wrong signal parameter

setting.

1．Check connection.

2．Check signal

parameter setting

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Annex II Sub-controller Parameters Manual

EN6000B4 Servo

Manual Operated Instruments

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Contents

1 PANEL DISPLAY DESCRIPTIONS ................................................. 21

2 DISPLAY AND DESCRIPTION OF SCREEN.............................. 23

2.1 BOOT SHOW 23 2.2 PARAMETERS SETTING FLOW CHART 23

3 PARAMETER-SETTING FORM........................................................ 24

4 DETAIL OF FUNCTIONS AND OPERATIONS 26

4.1 PARAMETER SAFETY PROTECTION ................................................................................. 26 4.2 MANUAL STATE AND AUTO STATE................................................................................. 27 4.3 VALVE POSITION FEEDBACK ADJUSTMENT ................................................................... 28 4.4 MAINTENANCE AND TROUBLESHOOTING ...................................................................... 29

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1 PANEL DISPLAY DESCRIPTIONS

Name Descriptions

For EN6000B4-2

Indicator for the manual output value in the manual state and the valve position control input value in the auto state.

For EN6000B4-4

No indicator in the manual state and indicator for the valve position control input value in the auto state.

SV

Indicator for parameter name in the parameter setup state.

Indicator for the feedback input value of valve position in the manual or auto state. MV

Indicator for parameter value in the parameter setup state.

MAN The lamp is on in the manual state and off in the auto state.

AL1：The lamp of ALARM 1

AL2：The lamp of ALARM 2

Indicator lamps

OUT/

OPEN

For EN6000B4-2, the lamp is always on.

For EN6000B4-3, the lamp is on means the OPEN relay is on.

RETR ： When an retransmission occurs, the lamp will be on.

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CLOSE

For EN6000B4-2, the lamp is always on.

For EN6000B4-4, the lamp is on means the CLOSE relay is on.

COM：When communication with the master computer, the lamp will flash.

Light Bar Percentage value indicator for valve position feedback input.

Auto/manual key

In the normal state, press for 2 sec to switch

Auto/Manual.

Together with , access to parameter safety protection.

In parameter setup state, press to return previous

display.

Function Key

In the normal state, press to enter the

parameter setup state and press once to move the display a step forward.

In the normal state, press and together

and hold for 2 sec to enter the parameter safety protection mode. Use the same operation to exit from the mode.

In the normal state and in the manual state, if valve

position adjustment is allowed, press and

together and hold for 2 sec to enter the valve

position adjustment mode.

Up Key

In the parameter setup state, the key is used to increase the value.

In the manual state, the key is used to increase the output value or run the positive rotation.

Keys

Down Key

In the parameter setup state, the key is used to decrease the value.

In the manual state, the key is used to decrease the output value or run the negative rotation.

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2 Display and Description of Screen

2.1 Boot Show

To connect the signal cables and power cables, refer to terminal configuration. Turn on

the power supply only after the wiring has been checked and tested. The instrument will

perform a power-on self-test for 1 second and then display the hardware configuration

information(refer to model code). It will then enter the normal operating state(or the initial

state of LEVEL0 mode). The manual output value or value position control input value is

displayed in the upper display window SV and the valve position feedback input value is

displayed in the lower display window MV. The display procedure is shown as follows:

2.2 Parameters Setting Flow Chart

In either of manual state and auto state, parameters can be set.

In the normal operating state, if parameter protection is not set (refer to parameter

safety protection), you may press for 2 sec to enter the parameter setup state. Under the

display of one parameter, you may press or to increase or decrease the setting

value of the parameter(refer to parameter table for its range). Continued pressing of

or brings a rapid increase or decrease of the value. Then press again to

ensure the modification of the parameter value and enter the next parameter. Here the

function of key is similar to that of the key. Press the key once to move the

display a step forward. Alternatively, press key once to move the display a step

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backward. Continued pressing of or brings rapid display movement. For the last

parameter, press the key once to exit from the parameter setup state and then press

again for another 2 sec to return the normal operating state. The instrument will then run the

new parameters.

Note: if no keys are pressed for 120 seconds, the display moves backward,

automatically, from parameter setup state to the normal operating state.

3 Parameter-Setting Form

Code Name Descriptions Range Setting

Control input Valve position control input signal: 0~20mA 0~10mA 4~20mA

0~5V 1~5V 0~10V

0~20 010A4~20 0~5 1~5

010V

4~20mA

Feedback input Valve position feedback input signal:

0~20mA 0~10mA 4~20mA

0~20 010A4~20 0~5

4~20mA

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0~5V 1~5V 0~10V

POT（potentiometer，resistance signal）

1~5 010VPOT

OP1 current Linear current output signal:

0~10mA,4~20mA,0~20mA 010A4~20 0~20

4~20mA

Position of decimal point

Defines the position of decimal point. 0 0.0 0.00 0.000

0

Control input low range

Define the low limit of control input signal.

-1999~9999

0

Control input high range

Define the high limit of control input signal.

-1999~9999

100

Control input offset The offset value is used to modify the

valve position control input value (SV). Control input + offset value= modified SV.

-1999~9999

0

Feedback input low range

Define the low limit of feedback input signal.

-1999~9999

0

Feedback input high range

Define the high limit of feedback input signal.

-1999~9999

100

Feedback input offset The offset value is used to modify the

valve position feedback input value (MV). Feedback input + offset value= modified MV.

-1999~9999

0

RETR signal Select the signal to be transmitted:

MV：MV retransmission SV：SV retransmission

MV SV

MV

RETR current Set the retransmission current range:

0~10mA, 4~20mA,0~20mA 010A4~20 0~20

4~20mA

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4 Detail of functions and operations

4.1 Parameter safety protection

In the normal operating state, either of manual and auto state, press and

together and hold for 2 sec, then enter the setup mode for parameter safety protection. Repeating the same operation will return the normal operating state.

Setting option

： key protection

：No key protection

：Set the key protection and key operation is disabled.

：Parameter protection

：no parameter protection and allow to modify parameters.

：sets parameter protection and parameter menu is disabled.

： Valve position adjustment.

： do not allow valve position adjustment.

： allow valve position adjustment.

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4.2 Manual State and Auto State

This instrument has two operating states, auto state and manual state. In the normal

operating state, press for 2 sec to switch from auto to manual state and MAN indicator

lamp will flash. Press for 2 sec again to switch back auto state and MAN indicator lamp

will be off.

The current output value follows the manual control input value (setting value). The

parameters, SV_L and SV_H, are used to set the manual control input low range and high

range. Their range are -1999~9999. MO_L and MO_H, are used to set the current output

low limit and high limit. There range are 0~100%. For example, if setting SV_L=100.0

SV_H=999.9, then in the manual state, when the SV window displays the manual control

input low range value, the current output value is equal to the minimum value of valve

position manual output signal range(its low limit MO_L). When the SV window displays the

manual control input high range value, the current output value is equal to the maximum

value of valve position manual output signal range (its high limit MO_H). For example, if

setting MO_L=30, MO_H=80, then the minimum value of the current output is equal to

30% of full scale and the maximum value of the current output is equal to 80% of full scale.

Here the parameters, MO_L and MO_H, are used to set the valve position feedback output

low limit and high limit to control when positive/negative rotation output stops. Their range

are 0~100%. In this state the single key control operation method of and key is

explained in detail as followed:

A. When pressing key, the output is positive rotation. It can’t stop until this key is

released or the valve position feedback value reaches MO_H.

B When pressing key, the output is negative rotation. It can’t stop until this key is

released or the valve position feedback value reaches MO_L.

C. When and are pressed or released at the same time, there is no signal

output.

The instrument receives the control input signal and outputs the current signal for valve

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setting. In the auto state, the output valve position open degree percent value equals the input

one. The output is isolated from the input. The parameters, AO_L and AO_H, are used to set

the current output low limit and high limit. Their range are 0~100%. For example, if setting

AO_L=10,AO_H=90, then the minimum value of the current output is equal to 10% of full

scale and the maximum value of the current output is equal to 90% of full scale. The

switching from auto to manual state is without disturbance.

4.3 Valve Position Feedback Adjustment

Only in the manual state and when valve position adjustment is allowed, the user is able

to execute valve position adjustment. After valve position adjustment is allowed, the single

key control of and key is disabled.

Adjustment for current output type of instrument:

Adjustment for motor positive/negative rotation control type of instrument:

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Valve position adjustment is disabled under following conditions:

（1） Valve position adjustment is not allowed.

（2） The instrument is in the auto state.

Why the instrument cannot exit from adjustment process?

When the adjustment operation is at the parameter , if it can not return the

normal operating state by pressing key once, the reason may be that:

（1） Potentiometers resistance is not properly set.

（2） The connection is not made between the feedback signal and the instrument.

（3） Valve does not move.

To solve the problem, press for 2 sec to force the instrument to return the normal

operating state, then eliminate malfunction and execute adjustment again. If it do not need

adjustment, valve position adjustment option should be reset parameter safety protection. if

valve position adjustment is still allowed, the single key control of and key is

disabled.

4.4 Maintenance and Troubleshooting

This instrument does not need special maintenance, if used within the specifications

described in this manual. Measurement errors will not increase even after extensive use.

Appropriately adjust the relay contact output control cycle time and ON/OFF alarm

hysteresis to avoid switching ON/OFF frequently. If signal exceeds the relay contact

capacity, use an auxiliary relay to execute ON/OFF control. For inductive loads, externally

connect a RC snubber or MOV transient/surge absorber.

General trouble:

Trouble Cause Solution

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PV display is

wrong

1． The ordered product model is not the

one the user needs.

2． The input signal code doesn’t match

actual input signal.

3． The wiring of the signal is incorrect.

1． Check model code

2． Check input parameter

setting

3． Correct the wrong wiring

No display 1．Power supply has failed

2．The instrument is damaged

1. Check power supply wiring

2. Replace the instrument

The keys are

disabled

1．The keys are locked

2．The keys are damaged

1．Unlock the keys

2．Check or replace the

instrument

error code

indication

See “Error code”

Error code:

Error code Trouble Cause Solution

Over the high range

1． The input signal has exceeded

the input high range by 10%.

2． Wrong input connection

Under the low range

1. The input signal is less than the

input low range by 10%.

2. Wrong input connection.

1．Check input signal.

2．Check the parameter

setting.

3．Check connection.

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ANNEX 3 Guide of Spare Parts No.

Table of Spare parts No.

Number Name Unit Equipment No

1 Level Measuring Device Set BFLC-30211

2 Level Measuring instrument Set BFLC-302111

3 Measuring instrument’s bracket Set BFLC-302112

4 Sprinkler Set BFLC-302113

5 Level Floating Ball Pcs BFLC-302114

6 Floating Ball Driver + disc Set BFLC-302115

7 Level sub-controller Pcs BFLC-302211

8 Field Operating Panel Set BFLC-30221

9 Pneumatic Actuator Set BFLC-30231

10 Positioner Pcs BFLC-302312

11 Filtering and reducing Valve Pcs BFLC-302313