INSTRUCTION MANUAL
ASLD2200 Monitor
Sludge Blanket Level Monitor
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ASLD2200 - Instruction Manual
Table of Contents
1 Introduction.................................................................................................................................................................. 5
1.1 General............................................................................................................................................................. 5
1.2 Output Signal.................................................................................................................................................... 5
1.3 Limit Relay........................................................................................................................................................ 5
1.4 Manual Conventions......................................................................................................................................... 5
1.5 Mechanical Overview........................................................................................................................................ 6
2 Principle of Operation................................................................................................................................................... 7
3 ASLD2200 Selection.................................................................................................................................................... 8
3.1 Sensor Selection............................................................................................................................................... 8
3.2 Encoder Disc Selection..................................................................................................................................... 9
3.2.1 Encoder Disc Ranges................................................................................................................................. 9
4 Control Settings......................................................................................................................................................... 10
4.1 Up and Down Buttons..................................................................................................................................... 11
5 Installation.................................................................................................................................................................. 12
5.1 Location.......................................................................................................................................................... 12
5.2 Electrical Connections.................................................................................................................................... 13
6 Configuration.............................................................................................................................................................. 14
6.1 Sensor Selection............................................................................................................................................. 14
6.2 Depth Range Selection................................................................................................................................... 14
6.3 Links............................................................................................................................................................... 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 Outputs...................................................................................................................................................................... 18
9.1 Analogue Output............................................................................................................................................. 18
9.2 Limit Relay...................................................................................................................................................... 18
10 Maintenance............................................................................................................................................................ 19
10.1 General Precautions..................................................................................................................................... 19
10.2 Routine Maintenance.................................................................................................................................... 19
10.3 Removal of the Printed Circuit Board Assembly............................................................................................ 19
10.4 Sensor replacement...................................................................................................................................... 21
11 Fault Finding............................................................................................................................................................. 22
11.1 Symptom: Digital display changes but does not relate correctly to the sensor position.................................22
11.2 Symptom: The sensor drives to the top limit................................................................................................. 23
11.2.1 Fault: Sensor is fouled............................................................................................................................. 23
11.2.2 Fault: Faulty External UP Switch............................................................................................................. 23
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ASLD2200 - Instruction Manual
11.3 Symptom: Motor does not respond to changes in the sludge blanket level; sensor working correctly...........24
11.4 Symptom: Excessive play on cable drum...................................................................................................... 24
11.5 Sensor operation check................................................................................................................................. 24
12 Spare Parts.............................................................................................................................................................. 25
12.1 Sensor.......................................................................................................................................................... 25
12.2 General......................................................................................................................................................... 25
12.3 Repair........................................................................................................................................................... 25
13 Technical Specifications........................................................................................................................................... 26
13.1 General......................................................................................................................................................... 26
13.2 Alarm Output................................................................................................................................................. 26
13.3 Analogue Output........................................................................................................................................... 26
13.4 EMC.............................................................................................................................................................. 26
13.5 Physical Features......................................................................................................................................... 26
14 Technical Support..................................................................................................................................................... 27
14.1 Returning Equipment for Repair.................................................................................................................... 27
15 Declaration of Conformity......................................................................................................................................... 28
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ASLD2200 - Instruction Manual
1 Introduction
1.1 General
The ASLD2200 is designed to monitor the position of a sludge blanket in a settlement tank. The system uses an
infrared gap type sensor to search for and then track, the interface between the sludge and the water.
This information is then provided via both an LED display and a 4-20 mA output signal.
1.2 Output Signal
The ASLD2200 provides a 4-20 mA output signal that is proportional to the location of the top of the sludge blanket.
With a normal setup the 4mA value relates to the bottom of the tank and 20 mA to the water surface.
1.3 Limit Relay
The ASLD2200 provides a relay contact closure when the display reads 100% or 0% or both.
1.4 Manual Conventions
The manual has been written on the basis that the user has a basic knowledge of instrumentation and an
understanding of the type of measurement being made.
Training in the use of the ASLD2200 Monitor can be provided by Partech, please contact sales for further information.
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ASLD2200 - Instruction Manual
1.5 Mechanical Overview
The ASLD2200 is composed of three component assemblies: The external cable drum and sensor, the motor drive
and encoder assembly, and the control electronics enclosure.
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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 - Instruction Manual
2 Principle of Operation
The ASLD2200 uses a Suspended Solids sensor to detect the density of the sludge & hence the position at which the
density makes a step change (the interface): The instrument moves the sensor to a point that is just above the
interface, (low SS), then lowers the sensor below the interface, (high SS), to confirm the position of said interface. The
control regime operating the motor is then tasked with constantly oscillating the sensor between low & high SS
readings, keeping the sensor at the point of interface. Hence detecting whether there is movement. The numeric
display will show the current value of the interface position in terms of percentage of liquid level in the tank. 0%
represents the bottom, and 100% is the surface the liquid.
The user is provided with information about the sensor reading by the panel of LED’s on the printed circuit board
assembly (PCBA).
The output of the sensor is divided as shown in the graph below:
The ‘motor’ LED’s will come on once the related sensor LED has been on for 5 seconds and the motor will activate.
The ‘limits’ LED’s will be used when the system reaches either 0 or 100%
The 3 digit LED display will indicate the position of the sludge blanket as a percentage of the depth of the tank. For
example if the tank is 4 metres deep and the display is showing 25%, the sludge blanket is 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 - Instruction Manual
3 ASLD2200 Selection
3.1 Sensor Selection
The ASLD2200 is supplied with a IR sensor; the correct sensor should have been selected before purchase. If you are
in any doubt about the sensor that has been supplied please contact Partech.
Sensor replacement in the field is easy to carry out; the table below indicates the normal application of the each of the
four sensor ranges.
IR100 range 0 to 200mg/l
This sensor is normally used for Suspended Solids
measurements and is not normally applied to Sludge
Blanket measurement. The sensor should only be used if
the sludge is very ‘light’ with very clear supernatant.
IR40 range 0 to 1,500mg/l
This is the most commonly used sensor and is suitable for
use on final settlement tanks in sewage treatment
applications and clarifiers in water treatment works.
IR15 range 0 to10,000mg/l
This sensor is also regularly used for sludge blanket
detection and is normally used for primary settlement in
sewage treatment and sludge thickeners in water treatme
IR8 range 0 to 30,000mg/l
This sensor should only be applied on sludge thickeners in
sewage treatment plants.
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ASLD2200 - Instruction Manual
3.2 Encoder Disc Selection
The ASLD2200 is supplied with a selection of encoder discs. The disk choice is dependant on the depth of the
measurement tank.
3.2.1 Encoder Disc Ranges
Number of Blades 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 - Instruction Manual
4 Control Settings
The principle control during operation is the rotary switch; this allows the user to select the following operations
In ‘AUTOMATIC’ mode the instrument will continually monitor the suspended solids density and will move the sensor
up and down to track the sludge blanket interface. The MOTOR UP/DOWN and STOP positions are self-explanatory
and are only used during the setup of the instrument.
On the circuit board there are a number of other controls, the function of these controls is explained in later sections:
Circuit Board Identity Type of Control Use
Zero Push Button Calibration
Top Limit Potentiometer Calibration
Bridge Clearance Potentiometer Scraper Clearance
VR1 - Motor Speed Control Potentiometer Factory setup
VR5 - 20mA Adjustment Potentiometer Factory setup
VR6 - 4mA Adjustment Potentiometer Factory setup
VR8 - 100% Potentiometer Factory setup
VR9 - 0% Potentiometer Factory setup
SW2 - Up Push Button Calibration and
maintenance
SW1 - Down Push Button Calibration and
maintenance
J1 - Link A Jumper Setup
J2 - Link B Jumper Setup
Reset Mode Switch Setup
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PANEL – WITH DISPLAY & CONTROL
ASLD2200 - Instruction Manual
4.1 Up and Down Buttons
The ASLD 2200 has 2 sets of Up and Down buttons; one set is on the outside of the enclosure the other set is on the
main printed circuit board (protruding above the front panel). Both sets have the same function. These buttons are
normally used to aid cleaning of the sensor by bringing the sensor to the surface.
Up and Stop
This button will cause the sensor to rise to the 100% point at the higher speed.
Down and Reset
This button will cause the sensor to return to automatic measurement
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EXTERNAL & INTERNAL MOTOR CONTROL BUTTONS
ASLD2200 - Instruction Manual
5 Installation
5.1 Location
The ASLD2200 is housed in an IP55 GRP outer enclosure and is suitable for mounting on the bridge of settlement
tanks. The electronics for the monitor are housed within an inner IP65 enclosure.
It is recommended that the monitor be mounted approximately half way between the centre and the outside wall of the
tank, on the leading edge. This offers allows the system to monitor the true settled interface whilst minimising the
effect of disturbance caused by incoming sludge and by the tank scraper.
It is normal for the 4-20 mA output signal to be transmitted via slip rings to the site control system, where this is not
possible Partech are happy to offer a radio telemetry system for transmission directly to the desired point.
Partech offer a mounting bracket shown below that allows easy attachment to tank handrails.
The ASLD2200 weighs 15 kg and can be difficult to handle, it is advisable to have assistance when
installing this instrument.
Do not lift the ASLD2200 by its cable drum.
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TYPICAL MOUNTING ARRANGEMENT & BRACKET DETAIL
ASLD2200 - Instruction Manual
5.2 Electrical Connections
Number Function Colour of
Internal Wiring
1
Remote Up Switch
White/Black
2
Remote Down Switch
Orange/Black
3
Remote Switch Common
Yellow/Black
4
4-20 mA Hi (+)
5
4-20 mA Lo (-)
6
Regulated 12v DC Output
7
0v DC
8
Limit Relay, 0% and/or 100%
9
Limit Relay, 0% and/or 100%
10
0v DC
11
Sensor Lo
Blue
12
Sensor 12v
Brown
13
5v DC to Encoder
Red14Input 1 from Encoder
Blue
15
Input 2 from Encoder
Yellow
16
0v DC to Encoder
Black
17
Nominal 18v DC to Motor (+ve)
Green
18
Nominal 18v DC to Motor (-ve)
Red/Brown
19
Not Used
20
Not Used
21
To mains isolator
Red/Brown
22
To mains isolator
Red/Brown
23
Earth
24
No connection
25
Neutral
26
Live
The ASLD2200 requires a mains power supply to operate this can be either 115 or 230v AC.
Unless specifically advised to do so, do not make changes to the internal wiring.
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PCBA SHOWING TERMINATION DETAILS
ASLD2200 - Instruction Manual
6 Configuration
The ASLD2200 requires very little configuration, the user must check the following details before use. If you find that
the incorrect sensor or encoder disc has been purchased contact Partech to arrange a replacement.
6.1 Sensor Selection
The IR sensors are available in four ranges; which are shown below along with typical applications.
Part
Number
Description Typical Application
102201 IR100, Range 0-200 mg/l Water Treatment Clarifiers
101901 IR40, Range 0-1,500 mg/l Sewage Treatment Final Settlement Water Treatment Primary
101601 IR15, Range 0-10,000 mg/l Sewage Treatment Primary Water Treatment Thickeners
148121 IR8, Range 0-30,000 mg/l Sewage Treatment Thickeners
6.2 Depth Range Selection
The depth range depends on the encoder disc that has been fitted to the instrument, this can be found near the motor
assembly.
Motor Assembly Version 2
CURRENT VERSION
(Thick aluminium side plates)
Motor Assembly Version 1
OLD VERSION
(Thin stainless steel side plates)
No of Blades Minimum Range
(metres)
Maximum Range
(metres)
Minimum Range
(metres)
Maximum Range
(metres)
1 11.0 20.0 5.6 13.8
2 5.5 11.0 2.8 6.9
4 3.0 6.0 1.4 3.4
6 2.0 4.0 1.0 2.2
8 1.5 2.5 0.8 1.6
The instrument will have been fitted with one of these encoder discs, and will have been selected prior to order
placement. The encoder disc can be changed in the field if required, see the rear of the manual for part numbers.
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ASLD2200 - Instruction Manual
6.3 Links
The circuit board has two sets of links (LINK_A & LINK_B), and a ‘Reset Mode’ switch that need to be set in the
correct position for the application.
Link A
When a jumper is placed the ‘ON’ position the limit relay will activate when the top limit LED is on – display is reading
100%. The factory default is for this jumper to be in the ‘ON’ position.
Link B
When a jumper is placed the ‘ON’ position the limit relay will activate when the bottom limit LED is on – display is
reading 0%. The factory default is for this jumper to be in the ‘ON’ position.
RESET MODE SWITCH
Switch to ‘RIGHT’ with white ident towards ‘BLANKET’ label
On power up, either during commissioning or after a power failure the sensor will immediately start to search for the
sludge blanket.
Switch to ‘LEFT’ with white ident towards ‘TOP’ Label
On power up, either during commissioning or after a power failure the sensor will lift to the top limit. It will then wait for
the down button to be pressed.
This switch setting will only effect operation with the rotary switch on ‘automatic’. Other settings of the rotary switch will
override this feature.
The factory setting for this switch is to the right (with white ident
showing towards ‘BLANKET’)
Switches SW7 & SW9 (as illustrated in the diagram on the right) are
set in the position shown. Do not move these switches. They are
intended for future enhancements of ASLD operation.
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POSITION OF PCBA MOUNTED LINKS & RESET SWITCH
RESET
MODE
SWITCH
LINK A
LINK B
SWITCH in 'UP' POSITION
SWITCH TO THE RIGHT
ASLD2200 - Instruction Manual
7 Calibration
Calibration is carried out in 2 stages; firstly set the zero point, then the 100% value. As the sensor is going to be
lowered to the bottom of the tank it is important that attention is paid to any hazards such as moving scrapers below
the surface of the tank.
NOTE: The Zero & 100% potentiometers mounted on the PCBA play no part in the calibration routine.
7.1 Set Zero
Set the rotary switch to ‘motor stop’ and
take the sensor down to the bottom of the
tank by taking loops of cable off the drum.
Once the cable is close to the bottom of
the tank gently raise and lower the sensor
and it will be possible to ‘feel’ the bottom
of the tank. Use the ‘motor up’ position of
the rotary switch to move the sensor such
that it is approximately 25 mm from the
bottom of the tank. Press the Red Zero
push button to set the zero point, it is
sometimes necessary to press this button
a few times to ensure a correct zero
setting.
It is important that the zero point is set
above the bottom of the tank, if the
sensor is allowed to drag on the floor of
the tank damage can occur and there is a
danger that the sensor can become
entangled in the scraper mechanism.
7.2 Set Span
Now use the ‘motor up’ position to bring
the sensor to the water surface. It is
normally advisable to leave the bottom
part of the sensor (approximately 50 mm)
under the surface.
Set the rotary switch to ‘motor stop’ and
adjust the Top Limit potentiometer until
the TOP LIMIT LED comes on (3 digit
LED display should approx be 100)
It is advisable to run the instrument back
down to 0 to confirm that the calibration
has been performed satisfactorily.
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ROTARY
SWITCH
STEP 1 – ZERO CALIBRATION
STEP 2 – SPAN CALIBRATION
DO NOT USE
THESE POTS
FOR SETTING
UP
CALIBRATION
ASLD2200 - Instruction Manual
8 Scraper Clearance
In certain applications such as those where the ASLD2200 is installed on a fixed bridge above a moving scraper it is
necessary to bring the sensor above the water surface to prevent damage to the sensor.
The ASLD2200 allows the user to instruct the sensor to rise to 100% to allow the scraper to pass and then return to
the tank to continue measurement.
It is recommended that the installer consult Partech before starting installation to ensure that the correct measures are
taken to prevent damage to either instrument or to the scraper mechanism.
Under normal circumstance it is possible to place a detector ahead of the bridge that will provide the ‘up’ command
and another sensor after the bridge that will provide the ‘down’ command.
These external sensors can be wired in parallel to the up and down button on the outside of the enclosure using
terminals 1 to 3.
8.1 Bridge Clearance Control
Associated with the scraper clearance function is the Bridge Clearance adjustment, this allows the sensor to come
clear of the water to allow the scraper to pass. To adjust use the following steps:
Raise the sensor to the surface using the rotary switch.
Select ‘motor off’
Turn off power
Set RESET MODE SWITCH to the LEFT (White Ident to the right)
Turn on power
Select ‘motor up’ and turn the bridge clearance control clockwise until the sensor is raised far enough to allow the
scraper to pass. This can be set to a maximum of 110%.
Return the unit to ‘automatic’ and press down to return to measurement.
If power is temporarily lost the sensor will rise to the surface on power up and remain there until the scraper passes
after which it will return to automatic measurement.
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ASLD2200 - Instruction Manual
9 Outputs
9.1 Analogue Output
The ASLD2200 has one analogue output that is directly proportional to the 0 to 100% digital display. Under normal
circumstances this relates to 4 mA with the sensor at the bottom of the tank and 20 mA with the sensor at the water
surface.
There is no need to make any field adjustments during commissioning. If during maintenance it is felt that the 4-20 mA
signal needs calibration this can be carried out using the 4 mA and 20 mA potentiometer adjustments.
To calibrate the analogue output connect a multimeter on the mA setting. Remove J13 and connect multimeter across
Pins 4 & 5. The ‘motor up’ and ‘motor down’ controls can then be used to force the output to 4 mA and 20 mA as
necessary.
If the ‘Up’ button is pressed at any time the 4-20 mA loop will go to 12 mA until the ‘Down’ button is pressed and the
sludge blanket is detected.
9.2 Limit Relay
The ASLD2200 is equipped with a relay that is normally open; when either the top or bottom limit is reached this
contact will close. Either or both top and bottom limits can cause this relay to activate, links A and B are used to
configure this feature.
It should be noted that the trip point is not adjustable.
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ASLD2200 - Instruction Manual
10 Maintenance
10.1 General Precautions
Do not lift the unit by the drum
Check that the unit is bolted firmly to the support bracket
Warning: Isolate the mains supply before commencing any maintenance to the electronics enclosure; the external
switch does not isolate the electronics
10.2 Routine Maintenance
The sensor will require routine cleaning; the frequency of cleaning is site dependent and should be determined by
observation of the sensor during the first few weeks of operation.
Typically the sensor should be cleaned once per fortnight, although on many sites once per month is sufficient.
The sensor can be cleaned using a soft cloth; no special cleaning materials are required.
Care must be taken to ensure that no loops of cable are displaced during cleaning and the sensor should be lowered
carefully into the tank after cleaning.
10.3 Removal of the Printed Circuit Board Assembly
1. Unscrew thumb screws and remove Front panel
2. Unscrew 3 pozi screws and remove terminal cover.
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FRONT PANEL SCREWS
1
2
ASLD2200 - Instruction Manual
3. Remove 3x Orange connectors
4. Remove 2X Nylon pillars
5. Unscrew earth nut and remove earth wires
6. Remove 2x Posi head screws and remove printed circuit board assembly
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6
4
5
3
PCBA SCREWS
ASLD2200 - Instruction Manual
10.4 Sensor replacement
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UNSCREW
4 X BOLTS
TO
REMOVE
SIDE PLATE
SIDE PLATE REMOVAL
DISCONNECT
SENSOR SPADE
CONNECTIONS
SENSOR WIRING REMOVAL
ASLD2200 - Instruction Manual
11 Fault Finding
Listed below are some of the common problems found on the ASLD2200, the list is not comprehensive and if you are
in any doubt please contact your local distributor or Partech.
11.1 Symptom: Digital display changes but does not relate correctly to the sensor position
Fault: Encoder incorrectly positioned
Remove motor assembly cover as per photograph below
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REMOVE TWO
SCREWS & SLIDE
COVER TO TE
LEFT
MOTOR ASSEMBLY COVER
REMOVAL
ASLD2200 - Instruction Manual
Encoder centre adjustment
Loosen 2x pozi screws on encoder bracket and slide the encoder assembly left or right until the encoder arms are
positioned centrally over the blade of the encoder disc
Encoder depth adjustment
Loosen the 2x Allen screws and adjust encoder bracket so that the encoder disc blade is positioned deep into the
encoder arms about 1mm clearance from the back.
After adjustment, check that disc blade is not touching any part of the encoder when the motor is moving.
11.2 Symptom: The sensor drives to the top limit.
11.2.1 Fault: Sensor is fouled
Clean the sensor.
If the problem persists after sensor cleaning then the sensor is likely to have failed. Contact Partech.
11.2.2 Fault: Faulty External UP Switch
Replace switch
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ENCODER ALIGNMENT
ENCODER
DISC
ENCODER
ASSEMBLY
ENCODER
ASSEMBLY
BRACKET
CENTRE
ADJUSTMENT
DEPTH
ADJUSTMENT
BELT
TENSIONER
ENCODER ALIGNMENT
ENCODER
DISC
ENCODER
ASSEMBLY
ENCODER
ASSEMBLY
BRACKET
CENTRE
ADJUSTMENT
DEPTH
ADJUSTMENT
BELT
TENSIONER
ASLD2200 - Instruction Manual
11.3 Symptom: Motor does not respond to changes in the sludge blanket level; sensor working
correctly.
Fault: Printed circuit board assembly fault.
Remove the printed circuit board assembly as described in section10.3 above, and return to Partech for investigation.
Pack the board carefully protecting the selector switch
11.4 Symptom: Excessive play on cable drum
Fault: Loose grub screws securing cable drum shaft
Tighten grub screws.
11.5 Sensor operation check
• Using the selector switch manually drive the sensor up or down till the display reads 80%
• Remove the sensor from the water and check the sensor operation as follows:
• Block the light path between the sensor gap and the Hi LED should light up
• Unblock the light path between sensor gap and the LO LED should light up
If this is not successful check continuity of sensor wiring between the orange terminal connector 11 &12 ( Sensor &
12v DC) and the spade connectors inside the drum.
• Red sensor wire with spade connector routes to brown wire on J9 (12V DC).
• Black wire with spade connector routes through to blue wire on J9 (Sensor)
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TIGHTEN 2X
GRUBSCREWS
DRUM SHAFT SECURING
ASLD2200 - Instruction Manual
12 Spare Parts
The parts listed below are available for the ASLD2200; it is advisable to contact your local distributor or Partech’s
technical support team before purchasing these parts to ensure that the correct items are purchased.
12.1 Sensor
Part No Description
102201 IR100 Sensor for ASLD2200
101901 IR40 Sensor for ASLD2200
101601 IR15 Sensor for ASLD2200
148121 IR8 Sensor for ASLD2200
12.2 General
Part No Description
101170 Mounting Bracket for ASLD2200
103370 Instruction Manual for ASLD2200
12.3 Repair
Part No Description
117150 Encoder Disc 1 Bladed for ASLD2200
117160 Encoder Disc 2 Bladed for ASLD2200
117170 Encoder Disc 4 Bladed for ASLD2200
121950 Encoder Disc 6 Bladed for ASLD2200
121960 Encoder Disc 8 Bladed for ASLD2200
222326 ASLD2200 Motor Assembly Version 2
222341 Drive Belt ASLD2200 Motor Assembly Version 2
228988 Replacement PCBA ASLD2200 Rev 10 - For ASLD2200 already fitted with Rev 10 PCBA
226784 Fuse 2.5A T 250V Anti-surge
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ASLD2200 - Instruction Manual
13 Technical Specifications
13.1 General
Supply Voltage 115/230 VAC, 50/60 Hz, +10/-15%
Power Consumption 25 VA
Supply Fuse Fuse 2.5A T 250V Antisurge 5mm x 20mm Glass (Fitted to PCBA)
Operating Temperature 0 to 50°C
Storage Temperature -20 to 70°C
Display 3 Digit LED
Sensing Speed 1 metre per minute
Manual Operation Speed 5 metres per minute
Accuracy Dependent on depth of tank typically +/- 5%*
Resolution +/- 100 mm*
Terminals: Max conductor cross section 2.5 mm2
13.2 Alarm Output
Number of Output 1 Contact Closure
Alarm Types Zero and/or 100% fixed
Relay Rating 0.5 A @ 100 VDC
13.3 Analogue Output
Type: 4-20 mA
Resolution: Better than 1%
4-20mA Maximum Output Load: 500 Ohms
13.4 EMC
EMC: EN 50081-1 (1992), EN 50082-1 (1994)
13.5 Physical Features
Dimensions: 350 x 490 x 382 mm (w h d)
Weight: 15 Kg
Environmental Rating: IP55 Outer Enclosure
IP65 Electronics Housing
Material: GRP
Cable Entry: 3 PG11
Mounting Legs 10 mm holes
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ASLD2200 - Instruction Manual
14 Technical Support
Technical Support is available by phone, fax, or email, the details of which are shown below.
• Phone: +44 (0) 1726 879800
• Fax: +44 (0) 1726 879801
• Email: techsupport@partech.co.uk
• Website: www.partech.co.uk
To enable us to provide quick and accurate technical support please have the following information ready when you
contact us:
• Serial Number or original purchase details
• Sensor Type, and Serial Number
• Application details
• Description of fault
14.1 Returning Equipment for Repair
If equipment needs to be returned to Partech for repair or service the following address should be used:
SERVICE DEPARTMENT
PARTECH INSTRUMENTS
ROCKHILL BUSINESS PARK
HIGHER BUGLE
ST AUSTELL
CORNWALL
PL26 8RA
UNITED KINGDOM
Please include the following information with the returned equipment. Also ensure that sensors are adequately
protected for transportation (Advice on packing can be provided by our service department).
• Contact name and phone number
• Return address for equipment
• Description of fault or service required
• Any special safety precautions because of nature of application
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ASLD2200 - Instruction Manual
15 Declaration of Conformity
DECLARATION OF CONFORMITY
According to EN 45014
We, Partech Instruments, Rockhill Business Park, Higher Bugle, St Austell, Cornwall, United Kingdom, declare under
our sole responsibility that the product:
Product Name: ASLD2200 Monitor
Model Number(s): 167430
to which this declaration relates is in conformity with the standards noted below:
EN 50081-1 (1992) EMC Generic Emission Standard
Residential, commercial & light industry
EN 50082-1 (1994) EMC Generic Immunity Standard
Residential, commercial & light industry
following the provisions of European Directives:
89/392/EEC Machinery Directive
91/368/EEC Amending 89/392/EEC
93/44/EEC Amending 89/392/EEC
89/336/EEC Electromagnetic Compatibility Directive
92/31/EEC Amending 89/336/EEC
93/68/EEC Amending 89/336/EEC
73/23/EEC Low Voltage Directive
93/68/EEC Amending 73/23/EEC
Roger Henderson, Technical Director, September 2003
Page 28 of 30 103370IM Issue 10 Date 19/03/2018
ASLD2200 - Instruction Manual
103370IM Issue 10 Date 19/03/2018 Page 29 of 30
Partech Instruments
Rockhill Business Park, Higher Bugle, St Austell, Cornwall, PL26 8RA, UK
Tel: +44(0)1726 879800
Email: info@partech.co.uk Web: www.partech.co.uk
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