ParTech ASLD2200 Bedienungsanleitung
INSTRUCTION MANUAL
ASLD2200 Monitor
Sludge Blanket Level Monitor
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ASLD2200 - In truction Manual
Table of Contents
1 Introduction.................................................................................................................................................................. 5
1.1 General............................................................................................................................................................. 5
1.2 Output Signal.................................................................................................................................................... 5
1.3 Limit Relay........................................................................................................................................................ 5
1.4 Manual Convention ......................................................................................................................................... 5
1.5 Mechanical Overview........................................................................................................................................ 6
2 Principle of Operation................................................................................................................................................... 7
3 ASLD2200 Selection.................................................................................................................................................... 8
3.1 Sen or Selection............................................................................................................................................... 8
3.2 Encoder Di c Selection..................................................................................................................................... 9
3.2.1 Encoder Di c Range ................................................................................................................................. 9
4 Control Setting ......................................................................................................................................................... 10
4.1 Up and Down Button ..................................................................................................................................... 11
5 In tallation.................................................................................................................................................................. 12
5.1 Location.......................................................................................................................................................... 12
5.2 Electrical Connection .................................................................................................................................... 13
6 Configuration.............................................................................................................................................................. 14
6.1 Sen or Selection............................................................................................................................................. 14
6.2 Depth Range Selection................................................................................................................................... 14
6.3 Link ............................................................................................................................................................... 15
7 Calibration.................................................................................................................................................................. 16
7.1 Set Zero.......................................................................................................................................................... 16
7.2 Set Span......................................................................................................................................................... 16
8 Scraper Clearance..................................................................................................................................................... 17
8.1 Bridge Clearance Control................................................................................................................................ 17
9 Output ...................................................................................................................................................................... 18
9.1 Analogue Output............................................................................................................................................. 18
9.2 Limit Relay...................................................................................................................................................... 18
10 Maintenance............................................................................................................................................................ 19
10.1 General Precaution ..................................................................................................................................... 19
10.2 Routine Maintenance.................................................................................................................................... 19
10.3 Removal of the Printed Circuit Board A embly............................................................................................19
10.4 Sen or replacement...................................................................................................................................... 21
11 Fault Finding............................................................................................................................................................. 22
11.1 Symptom: Digital di play change but doe not relate correctly to the en or po ition.................................22
11.2 Symptom: The en or drive to the top limit................................................................................................. 23
11.2.1 Fault: Sen or i fouled............................................................................................................................. 23
11.2.2 Fault: Faulty External UP Switch............................................................................................................. 23
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ASLD2200 - In truction Manual
11.3 Symptom: Motor doe not re pond to change in the ludge blanket level; en or working correctly...........24
11.4 Symptom: Exce ive play on cable drum......................................................................................................24
11.5 Sen or operation check................................................................................................................................. 24
12 Spare Part .............................................................................................................................................................. 25
12.1 Sen or.......................................................................................................................................................... 25
12.2 General......................................................................................................................................................... 25
12.3 Repair........................................................................................................................................................... 25
13 Technical Specification ........................................................................................................................................... 26
13.1 General......................................................................................................................................................... 26
13.2 Alarm Output................................................................................................................................................. 26
13.3 Analogue Output........................................................................................................................................... 26
13.4 EMC.............................................................................................................................................................. 26
13.5 Phy ical Feature ......................................................................................................................................... 26
14 Technical Support..................................................................................................................................................... 27
14.1 Returning Equipment for Repair.................................................................................................................... 27
15 Declaration of Conformity......................................................................................................................................... 28
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ASLD2200 - In truction Manual
1 Introduction
1.1 General
The ASLD2200 i de igned to monitor the po ition of a ludge blanket in a ettlement tank. The y tem u e an
infrared gap type en or to earch for and then track, the interface between the ludge and the water.
Thi information i then provided via both an LED di play and a 4-20 mA output ignal.
1.2 Output Signal
The ASLD2200 provide a 4-20 mA output ignal that i proportional to the location of the top of the ludge blanket.
With a normal etup the 4mA value relate to the bottom of the tank and 20 mA to the water urface.
1.3 Limit Relay
The ASLD2200 provide a relay contact clo ure when the di play read 100% or 0% or both.
1. Manual Conventions
The manual ha been written on the ba i that the u er ha a ba ic knowledge of in trumentation and an
under tanding of the type of mea urement being made.
Training in the u e of the ASLD2200 Monitor can be provided by Partech, plea e contact ale for further information.
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ASLD2200 - In truction Manual
1.5 Mechanical Overview
The ASLD2200 i compo ed of three component a emblie : The external cable drum and en or, the motor drive
and encoder a embly, and the control electronic enclo ure.
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DISPLAY
LED
INDICATORS
MOTOR SUB
ASSEMBLY
CABLE
DRUM
DRIVE
BELT
BELT
TENSIONER
SENSOR
ENCODER
BRACKET
ENCODER
ENCODER
DISC
AC MAINS
MOTOR ENCODER
& SENSOR
CONNECTIONS
EXTERNAL SWITCHES,
4-20mA O/P & RELAY
CONNECTIONS
SERIAL
NUMBER
FUSE
ASLD2200 - In truction Manual
2 Principle of Operation
The ASLD2200 u e a Su pended Solid en or to detect the den ity of the ludge & hence the po ition at which the
den ity make a tep change (the interface): The in trument move the en or to a point that i ju t above the
interface, (low SS), then lower the en or below the interface, (high SS), to confirm the po ition of aid interface. The
control regime operating the motor i then ta ked with con tantly o cillating the en or between low & high SS
reading , keeping the en or at the point of interface. Hence detecting whether there i movement. The numeric
di play will how the current value of the interface po ition in term of percentage of liquid level in the tank. 0%
repre ent the bottom, and 100% i the urface the liquid.
The u er i provided with information about the en or reading by the panel of LED’ on the printed circuit board
a embly (PCBA).
The output of the en or i divided a hown in the graph below:
The ‘motor’ LED’ will come on once the related en or LED ha been on for 5 econd and the motor will activate.
The ‘limit ’ LED’ will be u ed when the y tem reache either 0 or 100%
The 3 digit LED di play will indicate the po ition of the ludge blanket a a percentage of the depth of the tank. For
example if the tank i 4 metre deep and the di play i howing 25%, the ludge blanket i 1 metre from the bottom of
the tank
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PCBA OF DISPLAY PANEL SHOWING LEGENDS
DISPLAY PANEL SHOWING LEGENDS
INTERFACE
SUPERNATENT
CLEAN
WATER
SUSPENDED SOLIDS
SENSOR
OUTPUT
SENSOR ‘LO’
LED ON
BOTH LEDS
OFF
SENSOR ‘HI’
LED ON
ASLD2200 - In truction Manual
3 ASLD2200 Selection
3.1 Sensor Selection
The ASLD2200 i upplied with a IR en or; the correct en or hould have been elected before purcha e. If you are
in any doubt about the en or that ha been upplied plea e contact Partech.
Sen or replacement in the field i ea y to carry out; the table below indicate the normal application of the each of the
four en or range .
IR100 range 0 to 200mg/l
Thi en or i normally u ed for Su pended Solid
mea urement and i not normally applied to Sludge
Blanket mea urement. The en or hould only be u ed if
the ludge i very ‘light’ with very clear upernatant.
IR 0 range 0 to 1,500mg/l
Thi i the mo t commonly u ed en or and i uitable for
u e on final ettlement tank in ewage treatment
application and clarifier in water treatment work .
IR15 range 0 to10,000mg/l
Thi en or i al o regularly u ed for ludge blanket
detection and i normally u ed for primary ettlement in
ewage treatment and ludge thickener in water treatme
IR8 range 0 to 30,000mg/l
Thi en or hould only be applied on ludge thickener in
ewage treatment plant .
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ASLD2200 - In truction Manual
3.2 Encoder Disc Selection
The ASLD2200 i upplied with a election of encoder di c . The di k choice i dependant on the depth of the
mea urement tank.
3.2.1 Encoder Disc Ranges
Number of Blade Tank Depth (m)
1 11-20
2 5.5-11
4 3-6
6 2-4
8 1.5-2.5
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ENCODER DISC SELECTION
ASLD2200 - In truction Manual
Control Settings
The principle control during operation i the rotary witch; thi allow the u er to elect the following operation
In ‘AUTOMATIC’ mode the in trument will continually monitor the u pended olid den ity and will move the en or
up and down to track the ludge blanket interface. The MOTOR UP/DOWN and STOP po ition are elf-explanatory
and are only u ed during the etup of the in trument.
On the circuit board there are a number of other control , the function of the e control i explained in later ection :
Circuit Board Identity Type of Control Use
Zero Pu h Button Calibration
Top Limit Potentiometer Calibration
Bridge Clearance Potentiometer Scraper Clearance
VR1 - Motor Speed Control Potentiometer Factory etup
VR5 - 20mA Adju tment Potentiometer Factory etup
VR6 - 4mA Adju tment Potentiometer Factory etup
VR8 - 100% Potentiometer Factory etup
VR9 - 0% Potentiometer Factory etup
SW2 - Up Pu h Button Calibration and
maintenance
SW1 - Down Pu h Button Calibration and
maintenance
J1 - Link A Jumper Setup
J2 - Link B Jumper Setup
Re et Mode Switch Setup
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PANEL – WITH DISPLAY & CONTROL
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