Emerson Process Management MSL600 User Manual
Installation, Operation & Maintenance Manual
IP262/Z0, Rev. AB
February 2012
MSL600
Ultrasonic continuous sludge blanket monitor
Model Covered:
MSL600/Z0 with MSL603 transducer
MSL600
www.mobrey.com
Page 1
MSL600
THIS MANUAL COVERS MSL600 FROM SOFTWARE VERSION 3.00 AND ABOVE
Installation, Operation & Maintenance Manual
IP262/Z0, Rev. AB
February 2012
CONTENTS
FOR QUICK START, SEE SECTION 5 ON PAGE 20
(i) Safety precautions
Page
1. Introduction ............................................................................................................. 6
1.1 About the MSL600 ............................................................................................................................................... 6
1.2 About this Manual ............................................................................................................................................... 6
1.3 Important MSL600 features ................................................................................................................................ 7
1.3.1 Human Machine Interface ..................................................................................................................................... 7
1.3.2 Self-cleaning ......................................................................................................................................................... 7
1.4 As a system ......................................................................................................................................................... 8
2. Application planning ............................................................................................... 9
2.1 Circular clarifiers ................................................................................................................................................. 9
2.1.1 Rotating bridge ...................................................................................................................................................... 9
2.2 Rectangular clarifiers ....................................................................................................................................... 10
3. Installation ............................................................................................................. 11
3.1 Preliminary checks ........................................................................................................................................... 11
3.2 Location ............................................................................................................................................................. 11
3.3 Mounting bracket attachment .......................................................................................................................... 11
3.3.1 Bridge preparation ............................................................................................................................................... 11
3.3.2 Installing the bracket on the bridge ..................................................................................................................... 12
3.3.3 Attaching the MSL600 ......................................................................................................................................... 12
3.4 Transducer connections .................................................................................................................................. 14
3.5 Power and other electrical connections ......................................................................................................... 14
3.6 Cable extension ................................................................................................................................................. 16
4. Programming ......................................................................................................... 17
4.1 Display ............................................................................................................................................................... 17
4.2 Contrast (viewing angle) control ..................................................................................................................... 18
4.3 Keypad and Menu Navigation .......................................................................................................................... 18
4.4 Security .............................................................................................................................................................. 19
4.5 On-line/Off-line .................................................................................................................................................. 19
5. Quick start parameters ......................................................................................... 20
5.1 Tank depth - Bottom reference ........................................................................................................................ 20
5.2 Determination of tank depth ............................................................................................................................. 21
5.3 Transducer self-cleaning .................................................................................................................................. 21
5.4 mA current output parameters ......................................................................................................................... 22
5.5 Current output adjust ....................................................................................................................................... 22
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IP262/Z0, Rev. AB
February 2012
5.6 Relay parameters .............................................................................................................................................. 23
5.7 Alarm .................................................................................................................................................................. 23
5.8 Transducer out-of-water time ........................................................................................................................... 23
5.9 Digital input ....................................................................................................................................................... 24
MSL600
6. Detailed operation ................................................................................................. 25
6.1 The menu structure ........................................................................................................................................... 25
6.2 Parameter editing .............................................................................................................................................. 26
6.3 Scrolling ............................................................................................................................................................. 26
6.4 Direct access ..................................................................................................................................................... 26
7. Application parameters ........................................................................................ 27
7.1 Main menu parameters ..................................................................................................................................... 27
7.1.1 Cancel password ................................................................................................................................................. 27
7.1.2 Go Online/Offline ................................................................................................................................................. 27
7.2 Installation parameters ..................................................................................................................................... 27
7.2.1 Tank Depth – P101 ............................................................................................................................................. 27
7.2.2 Xdr Tilt Time – P103 ........................................................................................................................................... 27
7.2.3 Tag No. – P242 ................................................................................................................................................... 27
7.2.4 Description – P240 .............................................................................................................................................. 28
7.3 De-sludge parameters ...................................................................................................................................... 28
7.3.1 Start On - P250 ................................................................................................................................................... 28
7.3.2 Stop On - P251 ................................................................................................................................................... 28
7.3.3 Stop If - P252 ...................................................................................................................................................... 29
7.3.4 Start Time - P253 ................................................................................................................................................ 29
7.3.5 Interval - P254 ..................................................................................................................................................... 29
7.3.6 Max Retries - P257 ............................................................................................................................................. 29
7.4 Cleaning parameters ......................................................................................................................................... 30
7.4.1 Start On - P260 ................................................................................................................................................... 30
7.4.2 Interval - P264 ..................................................................................................................................................... 30
7.4.3 Cleaning Time - P444 ......................................................................................................................................... 30
7.5 mA output parameters ...................................................................................................................................... 30
7.5.1 Lower Range Val - P400 ..................................................................................................................................... 30
7.5.2 Upper Range Val - P401 ..................................................................................................................................... 30
7.5.3 Alarm Action - P402 ............................................................................................................................................ 31
7.5.4 0/4-20mA - P403 ................................................................................................................................................. 31
7.6 Relay parameters .............................................................................................................................................. 32
7.6.1 Relay RL1 mode (P410) and RL2 mode (P420).................................................................................................. 32
7.6.2 Relay On and Off Points ..................................................................................................................................... 34
7.6.3 Relay overrides (Min ON, Max ON, and Min OFF) .............................................................................................. 34
7.7 Display parameters (HMI) ................................................................................................................................. 34
7.7.1 HMI upper, middle, and lower display options ..................................................................................................... 34
7.7.2 Backlight On/Off - P575 ...................................................................................................................................... 35
7.7.3 Clear Trend ..............................................................................................................
7.7.4 Clear Profile ........................................................................................................................................................ 35
7.8 Logging parameters .......................................................................................................................................... 36
7.8.1 Log Interval - P590 .............................................................................................................................................. 36
7.8.2
7.8.3 Data Overwrite - P592 ......................................................................................................................................... 36
Fast log - P591 .................................................................................................................................................... 36
........................................... 35
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MSL600
Installation, Operation & Maintenance Manual
IP262/Z0, Rev. AB
February 2012
7.8.4
7.9 Engineering parameters ................................................................................................................................... 37
7.9.1 Alg. Select – P620 ............................................................................................................................................... 37
7.9.2 Common algorithm parameters P621 to P629 .................................................................................................... 37
7.9.3 Municipal 1 parameters P630 to P637 ................................................................................................................ 40
7.9.4 Municipal 2 parameter P640 ............................................................................................................................... 42
7.10 System parameters ........................................................................................................................................... 43
7.10.1 AUTO CYCLE function ........................................................................................................................................ 43
7.10.2 DISPLAY test ...................................................................................................................................................... 43
7.10.3 Current Output test parameters P700 to P702 .................................................................................................... 43
7.10.4 LOAD DEFAULTS function ................................................................................................................................. 43
7.10.5 COMMS parameters P710 to P716 ..................................................................................................................... 44
7.10.6 SETTINGS parameters P730 to P737 and BASE UNITS selection .................................................................... 44
7.10.7 PIN parameter P740 ........................................................................................................................................... 45
7.10.8 FIXED parameters D750 to D753 ....................................................................................................................... 45
7.11 Readings and diagnostics parameters ........................................................................................................... 46
7.11.1 Readings parameters D800 to D834 ................................................................................................................... 46
7.11.2 Diagnostics parameters D835 to D852 ............................................................................................................... 47
Low Mem Alarm - P593 ....................................................................................................................................... 36
8. Technical reference ............................................................................................... 49
8.1 Transmit pulse and echo processing .............................................................................................................. 49
9. Maintenance .......................................................................................................... 49
10. Troubleshooting .................................................................................................... 49
11. Programming chart ............................................................................................... 50
12. Specification.......................................................................................................... 53
12.1 MSL600 .............................................................................................................................................................. 53
12.2 MSL603 transducer ........................................................................................................................................... 54
13. Dimensional drawings .......................................................................................... 55
14. MSL603 transducer cable extension ................................................................... 57
Figures and tables
Figure (1): MSL600 system architecture .......................................................................................................................... 9
Figure (2): Circular clarifiers – Rotating bridge ................................................................................................................. 10
Figure (3): Circular clarifiers - Static bridge ...................................................................................................................... 11
Figure (4): Rectangular clarifiers ...................................................................................................................................... 11
Figure (5): MSL600 mounting ........................................................................................................................................... 14
Figure (6): Transducer cable wiring .................................................................................................................................. 15
Figure (7): External connection terminals ......................................................................................................................... 16
Figure (8): The LCD display layout ................................................................................................................................... 18
Figure (9): Keypad layout ................................................................................................................................................. 19
Figure (10): Tank depth parameter ................................................................................................................................. 21
Figure (11): Menu structure .............................................................................................................................................. 26
Figure (12): MSL600 Bridge mounted unit ....................................................................................................................... 53
Figure (13): MSL600 and MSL603 assembly ................................................................................................................... 54
Table (A): Connection descriptions reading from left to right (all via M20 cable glands) .................................................. 16
Table (B): Relay Parameter numbers ............................................................................................................................... 32
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February 2012
(i) Safety precautions
BEFORE OPERATING THIS DEVICE THE MANUAL SHOULD BE READ FULLY
The following safety precautions should be observed before using this product or working on the attached cables.
x This MSL600 product is intended for use by qualified personnel who recognize shock hazards and are familiar
with the safety precautions required to avoid possible injury. Read the operating information carefully before
using the product.
x The types of product users are:
Responsible body: This is the individual or group responsible for the use and maintenance of equipment, and
for ensuring that operators are adequately trained. Operators use the product for its intended function. They
should not be allowed access to the electrical connections within the control box, and would normally only
operate the external keypad and monitor the display.
Maintenance personnel perform routine procedures on the product to keep it operating, for example, checking
the line voltage or checking electrical connections, replacing mains fuses etc. Otherwise, only service
personnel should perform them.
Service personnel are trained to work on live circuits, and perform safe installations and repairs of products.
Only properly trained service personnel may perform installation and service procedures. There are no user
serviceable parts on the main PCB section of the MSL600 product.
x Users of this product must be protected from electric shock at all times. The responsible body must ensure
that users are prevented access and/or insulated from every connection point. Product users must be trained
to protect themselves from the risk of electric shock.
x Before operating an instrument, make sure the line cord is connected to a properly grounded power
receptacle. Inspect the connecting cables for possible wear, cracks, or breaks before each use. When fuses
are used in a product, replace with same type and rating for continued protection against fire hazard.
x Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth
ground connections.
x Standard fuses, with applicable national safety approvals, may be used if the rating and type are the same. If
you are unsure about the applicability of a replacement component, call a MOBREY office for information.
Only use the MSL600 with the sensor supplied or Mobrey agreed replacement. The unit will not necessarily
work with apparently equivalent sensor units.
MSL600
x To clean the instrument, use a damp cloth or mild, water based cleaner. Clean the exterior of the instrument
only. Do not apply cleaner directly to the inside of the instrument or allow liquids to enter or spill on the
instrument.
x WARNING - If this equipment is used in a manner not specified by Mobrey, the protection provided may be
impaired. The MSL600 is regarded as permanently installed equipment and as such a switch or circuit
breaker must be included in the installation. This should be in close proximity to the equipment, it should be
marked as the disconnecting device, and it should disconnect both current carrying conductors.
x A protective earth should be used for all applications.
x The normal application of the MSL600 requires it to be mounted on a water handling plant. The installation
point and power cables associated with the MSL600 must be such that tank overflow, local flooding or pump
failure do not cause these to be submerged or subject to flows of water. Sensor and sensor cabling can be
submerged without hazard to equipment operators when correctly connected as described in this manual.
Explanation of symbols: The IEC Protective Earth Symbol is:
CHECK THAT THE POWER SUPPLY IS SUITABLE BEFORE SWITCHING POWER ON.
Internal adjustments can select mains 115 Volts AC power, which makes the equipment unsuitable for 230V AC
supplies. Check the 2 voltage selection switches compared with the available power supply.
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MSL600
1. Introduction
Before operating this device the manual should be read carefully paying particular attention to the safety
precautions laid out in section (i).
This instruction manual provides comprehensive information specific to the Mobrey Measurement continuous
suspended solids blanket level monitor, the MSL600.
1.1 About the MSL600
The basic MSL600 system contains an ultrasonic transducer and a bridge-mounted control unit.
The control unit is microprocessor-based and is given the designation MSL600. It is intended to be mounted on a
bridge using a specially designed and easy-to-install mounting bracket that is supplied with the system.
The system is specially adapted for use with clarifiers and thickeners containing municipal and industrial
wastewater treatment sludge. The MSL600 provides a means of sensing the presence of the sludge blanket and
measuring its depth in the clarifier. It also provides a range of current and relay outputs to the user for control and
alarm purposes.
The MSL600 uses the sonar principle, with an ultrasonic pulse transmitted under water from a partially
submerged, IP68-rated transducer (MSL603). The pulse of ultrasound is transmitted vertically down into the
clarifier tank, and then reflects from the surface of the sludge blanket. The system captures the ultrasonic echoes
received from the sludge blanket interface and determines the time-of-flight of the echo from the transducer to the
sludge blanket.
February 2012
Knowing the speed of sound in the supernatant (the system has automatic temperature compensation), the
control unit calculates the distance to the blanket interface. This distance is then subtracted from the
programmed depth of the tank to give the sludge blanket depth or interface level. This is the system’s
fundamental process variable.
1.2 About this Manual
This section introduces the user to the MSL600 system, its components and key features. The system’s mode of
operation is explained in this section.
In section 2, the manual discusses application planning where installation is primarily intended to be on municipal
and industrial wastewater clarifiers.
In section 3, the manual discusses the actual physical process of mechanical and electrical installation of the
system. This section provides a step by step procedure for easy installation of the MSL600 system on site.
In section 4, the manual introduces the basics of programming the system. This section introduces the human
machine interface (HMI), keypad and display
In section 5, the manual discusses the minimum programming steps needed for commissioning the system so
that a meaningful measurement can be made. This quick start setup section is intended to cater for the needs of
most users.
In section 6, the manual discusses in more detail the human machine interface and how the system is
programmed.
In section 7, all of the system’s parameters are discussed and their function detailed. Sections 6.0 and 7.0 are
primarily intended for the more advanced user who needs to tune the system to meet an unusual application.
In section 8, the manual discusses in detail the mode of operation of some of the key system elements. This
section is intended for the most advanced user.
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Finally, sections 9 to 13 cover maintenance, troubleshooting, programming chart, technical specifications and
dimension drawings relevant to using the MSL600 system.
MSL600
1.3 Important MSL600 features
The MSL600 system incorporates several unique design features which are intended to promote trouble free
operation, give a degree of installation flexibility, and allow ease of installation.
1.3.1 Human Machine Interface
In common with other Mobrey Measurement control units, the MSL600 makes use of the Mobrey Measurement
Human Machine Interface (HMI). The HMI reflects comments and suggestions received about the need to be
easy and intuitive to use. The intention is that you should be able to program and interrogate the system using the
integral membrane keypad and Liquid Crystal Display (LCD) without the need for regular reference to this manual.
For the more experienced user, the HMI also facilitates rapid navigation of the menu structure to system parameters.
1.3.2 Self-cleaning
One of the most important features of the MSL600 is its transducer self-cleaning facility.
In the application for which the system is designed, the transducer is normally mounted in a relatively hostile
environment. In this environment, the likelihood of the transducer becoming coated or otherwise fouled is
relatively high. A fouled transducer is far less efficient at transmitting sonar pulses into the supernatant. Without
the ability to automatically clean itself, the transducer maintenance cycle would need to be more regular, and thus
increase the life cost of the system.
Experience suggests that any moving mechanical cleaning devices are themselves prone to fouling. It is for this
reason that the MSL600 uses an air purge cleaning function. Extensive experimental results show that this
method is extremely effective in keeping the face of the transducer free from any coating growth or build-up of
floating debris.
The cleaning cycle is optimised for maximum efficiency. However, you can manually initiate a cleaning cycle or
override this feature by turning it off.
1.3.3 Mounting bracket
Most clarifier tanks have railings on the walkway, rotating or moving bridge or walkway. It is recommended that
the MSL600 be mounted on these railings. The MSL600 system is supplied with a purpose designed mounting
bracket. This bracket design has been optimised to fit most designs of railing. This is intended to provide
alignment and a stable platform for the transducer and control unit.
The transducer and mounting bracket, collectively known as an MSL603, are intended to be fitted to the clarifier
before the MSL600 control unit is attached to them. This allows mechanical adjustment and fitting without the
need to worry about the electronics in the enclosure.
The transducer mounting arrangement is hinged so that the transducer can be lifted out of the water, using the
chain provided, for ease of maintenance (in most cases this will not be necessary because the transducer is selfcleaning). When installed, the transducer front face should be continually immersed in water to a depth of
approximately 75mm (3 inches). The MSL600 mounting bracket should allow sufficient adjustment for this in
most cases. Extensions and extra tubes are readily available from a number of sources to allow the mounting to
be modified – contact Mobrey Measurement Sales for assistance (see section 3.3.3 for other sources).
Note:
The MSL603 transducer can also be supplied without mounting hardware and is supplied complete with
10 metres (33 feet) of connecting cable and air hose for the self-cleaning system. This allows the installer to
provide their own mounting arrangements using suitable 25mm (1 inch) pipe or conduit. This arrangement is
normally supplied for fixed bridges or enclosed tanks where a pivoting sensor is not required.
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MSL600
1.4 As a system
Figure (1) shows the architecture of the complete MSL600 system and where each component is intended to be
used. Install the MSL603 transducer and mounting bracket on the rotating bridge or fixed walkway over the
clarifier tank. Install the MSL600 control unit on the mounting bracket.
Figure (1): MSL600 system architecture
February 2012
Location
Fixed or rotating bridge
3 relay
outputs
RS232
4-20mA
output
MSL600 - Standalone Bridge Mount Unit
PLC/SCADA
PC or
Laptop
com
ute
Location
Control room
MSL603 Transducer
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February 2012
2. Application planning
The following section discusses a few practical considerations when planning an installation.
2.1 Circular clarifiers
Circular clarifiers are very common and can come with rotating or static bridges over them.
2.1.1 Rotating bridge
If the transducer is mounted on a rotating bridge then it should be positioned on the leading edge of the bridge,
see Figure (2). This places it ahead of any bow wave in the sludge blanket which may be created by trailing sub
surface scrappers that would otherwise give rise to a false indication of the blanket level.
Ideally the transducer should be mounted between 1/3 and 2/3 of the way along from the outer (wall) edge of the
settlement tank (i.e. 1/3 to 2/3 of the radius from the inside of the tank wall).
Care should be taken to ensure that the transducer is mounted over an undisturbed section of the tank, i.e. not
too close to the tank inlet or tank wall, and away from columns of rising gas bubbles. All of these factors can
result in false sonar echoes being received. It is recommended that the transducer be mounted at least
1m (3.3 feet) from any such structures.
If a scum removing skimmer is present then the transducer should be mounted behind this.
MSL600
When locating the transducer the user must ensure that there are no permanent underwater obstructions below
the transducer, as these will give false sonar echoes and disrupt the signal. It is recommended that the
transducer be mounted at least 1m (3.3 feet) from any such structures.
Ensure that the transducer does not come into contact or collide with any scum boards, weirs or other surface
obstructions as the bridge rotates.
Figure (2): Circular clarifiers – Rotating bridge
Approximate
MSL600
mounting
position
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MSL600
2.1.2 Static bridge
The transducer mounting arrangement is designed to lift out of the water if it is mounted on a fixed bridge when a
moving scraper passes underneath (e.g. on a picket fence thickener). Ideally, the transducer should be mounted
1/3 to 2/3 of the way along from the outer (wall) edge of the settlement tank (i.e. 1/3 to 2/3 of the radius from the
inside of the tank wall).
If the transducer is mounted on a static bridge then it should be positioned on the trailing edge of the bridge, see
Figure (3). This gives the hinge mechanism maximum clearance from the bridge structure.
Ensure the transducer guard is facing towards the moving sweeper. The guard and hinge mechanism can be
angled slightly to meet the rotating parts at a normal incidence. This avoids the transducer guard sliding
sideways along the rotating part as it is lifted.
Always check that the parts sliding over each other will not become entangled or locked together. The rotating
mechanism on most bridges is strong enough to bend the mounting bracket if this should happen.
It is strongly recommended that a few uneventful rotations be observed before installation is completed.
Figure (3): Circular clarifiers - Static bridge
February 2012
2.2 Rectangular clarifiers
As with a rotating bridge and a circular tank, the transducer should be mounted from the leading edge of the
bridge to avoid false level readings from the disturbed bow wave in the sludge blanket as the bridge scrapes
sludge into the hopper at the end of the clarifier.
The considerations detailed in section 2.1 for rotating clarifiers should all be considered as appropriate for a
rectangular clarifier.
Figure (4): Rectangular clarifiers
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MSL600
3. Installation
The following section discusses installation considerations in more detail.
3.1 Preliminary checks
Carefully unpack the MSL600 control unit, transducer, and mounting bracket arrangement from their packaging.
Check that there is no visible damage to any of the packed parts, paying particular attention to the transducer and
transducer cables, and the membrane keypad and display area on the MSL600.
Contained in the packaging should be the following:
Pack one
• 1 x MSL600 bridge mounted unit, with compressor housing containing the air compressor for self-cleaning on
a metal mounting plate (pre-assembled).
• 1 x MSL600 manual.
Pack two
• 1 x transducer assembly, and bridge mounting kit (including tool kit).
(Optional – MSL603 transducer only with 10 metres of cable and air hose)
3.2 Location
Determine the optimum location for installation of the MSL600 following the hints and tips given in section 2,
Application planning.
3.3 Mounting bracket attachment
The mounting bracket is specifically designed for mounting on the centre rail of the safety railing on the bridge of
any settling tank, see Figure (5). The rail can be any diameter up to 52mm (2 inches).
The bracket is also clamped to the bridge kicking board or similar supporting frame.
Adjustments can be made for different bridge heights, and the bracket can be angled to miss obstructions.
An extension arm can be added to the main support tube to extend the adjustment of the bracket further, if required.
Most adjustments are made by hexagon key and spanner, included in the supplied bridge mounting kit.
The transducer arm hangs vertically from a pivot and can be swung out of the water for cleaning and inspection.
WARNING!
The transducer is a sensitive instrument and care must be taken to prevent unnecessary impact or strain on it during installation.
3.3.1 Bridge preparation
The bracket should be prepared and initial adjustments made off the bridge. If any obstructions are present in the
installation area, the unit should be set up accordingly. This will greatly simplify any adjustments required during
mounting of the unit on the bridge. The cable and hose from the transducer should be handled with care to
prevent any sharp bending, especially in the area where they exit the transducer arm.
Check there is sufficient room between the top rail, centre rail, and any other structure for the control box to be
fitted. The space required is 430mm (17 inches) high and 360mm (14 inches) wide [see Figure (5)].
Measure the distance from the water surface to the centre rail of the safety railing (dimension A).
Measure the distance from the centre rail to the kicking board (dimension B) or similar structure.
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MSL600
With the bracket on the ground adjust the pivot tube up or down the main support tube until the distance between
the angle bracket and midpoint of the transducer is dimension A. Adjust the clamping bracket up or down the
main support tube to dimension B so it will be just clear of the final clamping position.
If the clamp is higher than the pivot tube this will need to be removed and reassembled in reverse order (view X).
If dimension A is too large and cannot be achieved, remove the pivot tube assembly, screw on the extension tube
and refit the pivot tube (view Y). If the pivot arm is to be set at an angle or set to the opposite hand, this should
be done at this stage.
Adjust the transducer guard so that it is at 90° to the pivot arm, projecting under the pivot arm and approximately
25mm (1 inch) below the bottom of the transducer.
If necessary move the chain attachment clamps to positions convenient for swinging the transducer out of the
water. Adjust the chain so that it is slightly slack with the unit fully extended and any excess chain is hanging on
the main support tube and not the transducer arm.
The cable and air hose can now be attached to the bottom of the main support tube with the cable ties provided.
The cable and hose must make a 360° loop between transducer tube and main support tube to allow for flexing
when the arm is lifted. Move the transducer arm up and down and check that the cable and hose move freely
without excessive strain.
Before installing the unit on the bridge check that all the fittings associated with pivot tube are securely tightened,
including those which have not been adjusted, as these are often difficult to reach later.
3.3.2 Installing the bracket on the bridge
Before carrying the unit on to the bridge, swing the transducer arm into the up position and attach it to the main
support tube with the chain. This makes the unit more compact and easier to manage. Lift the unit over the
handrail and hook it on to the horizontal centre tube of the rail. Release the rail clamp and push it up firmly under
the rail. While pushing on the barrel of the rail clamp (not the lug) retighten the clamping screw. This will
ensure a tight fit against the rail.
Loosen the clamping bracket assembly, attach it to the kicking board or similar structure and retighten. The
studding allows the main support tube to be adjusted approximately to the vertical position. In some instances
one or both nuts between the clamps will need to be removed. Tighten all fixings.
Lower the transducer arm carefully into the water and check the water surface is approximately in line with the top
of the parallel portion of the transducer and it is clear of obstructions. Adjust the pivot arm height and angle as
necessary. It is recommended the unit be removed from the bridge to make these fine adjustments. Ensure the
cable and air hose still move freely without excessive strain when the transducer is raised and lowered.
Check that the transducer arm is hanging vertically. The transducer guard also functions as a balance arm.
To adjust, swing the arm up and loosen the transducer guard. Move the guard backwards or forwards as
appropriate and retighten. Repeat until the arm hangs vertically.
When the unit is installed and functioning correctly check all fittings are securely tightened, including those which
have not been adjusted.
3.3.3 Attaching the MSL600
The MSL600 and compressor box come attached to a back plate complete with mounting lug. Check the
clamping screw of the mounting lug is clear of the inside face and slide the complete unit onto the top of the main
support tube. Orientate the unit to the correct position and tighten the clamping screw.
February 2012
Run the cable and hose up to the control unit avoiding sharp bends and flattening of the hose. Plug the air hose
onto the air connector on the bottom of the compressor box. The unit is now ready for wiring.
Additional fittings for MSL bracket (UK only) can be obtained from:
Alvin Products Limited, Knight Works, 10-12 Hampton Street, London, SE1 6SN
Tel. 020 7708 2004, Fax. 020 7708 3044, Web site:
Fittings are ALVIN ‘KEY’ CLAMPS (Size 5 - 26.9mm dia.) Similar fittings are also available from other manufacturers.
Note: Socket head screws require 1/4” A/F Hex key clamp bracket screws require 17mm A/F spanner.
www.alvin.net
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February 2012
Figure (5): MSL600 mounting
MSL600
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MSL600
3.4 Transducer connections
The MSL600 is housed in an ABS enclosure rated to IP66. The lower section of the housing is for cable
connections and the upper part has the LCD and keypad controls.
It is not necessary, or advisable, to remove the lid of the upper part of the enclosure. There are no user
serviceable parts inside.
All field wiring connections are accessible by removing the lower lid, which is secured by four screws. Inside the
terminal area, all connections are made using screw terminals. All terminal blocks are suitable for wires 0.5mm
2
2.5mm
(26 to 12 AWG). Insulation should be stripped back 7.0mm (0.25 inches).
The transducer cable comprises of five wires, see Figure (6), the connections for which are as follows:
• White wire - Transducer signal wire. This should be connected to the terminal
block marked ‘SENSOR’ and ‘SIG’.
• Black wire - Transducer 0V wire. This should be connected to the terminal block
marked ‘SENSOR’ and ‘0V’.
• Yellow wire - Transducer screen wire. This should be connected to the terminal
block marked ‘SENSOR’ and ‘SCN’.
• Red wire - Temperature compensation positive wire. This should be connected
to the terminal block marked ‘TEMP’ and ‘IN’
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2
to
• Brown wire - Temperature compensation 0V wire. This should be connected to
the terminal block marked ‘TEMP’ and ‘0V’.
Figure (6): Transducer cable wiring
All connections to the transducer are intended to be made via the first M20 cable gland (fitted) on the left-hand
side, at the bottom of the MSL600 enclosure.
3.5 Power and other electrical connections
(See also section (i), safety precautions)
It is the responsibility of the installer to observe all local regulations and approval requirements, and to use cable
to suit the environmental requirements of the particular application.
Prior to applying power to the unit ensure that the two voltage selection switches are set to the appropriate
voltage for the installation.
In the event of a fuse needing replacement the user must ensure that the mains input fuse (F1) has a rating of
200mA (F) and the cleaning compressor (F2) has a rating of 1A(T).
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February 2012
The diagram below, Figure (7) shows the layout of external connection terminals of the MSL600 with the lower
terminal housing cover removed. Table (A) gives a description of each.
Note:
When wiring of the unit is finished, ensure that the terminal housing cover is replaced the correct way up, i.e. with
the bevelled edge uppermost otherwise the IP rating of the enclosure may be compromised.
Figure (7): External connection terminals
SENSOR TEMP (see note 1)
SIG Transducer sonar signal (white)
0V Transducer zero volts (black)
SCN Transducer screen (yellow)
IN Temperature compensation signal (red)
0V Temperature zero volts (brown)
DIGITAL INPUT (see note 2)
1 Digital input signal
0V Digital input zero volts
CURRENT OUT ISOLATED
0V Current output zero
Io Current out
24V 24V source for current output (Not normally used)
RELAY 1 (de-energised state)
NO Normally open
C Common
NC Normally closed
RELAY 2 (de-energised state)
NO Normally open
C Common
NC Normally closed
RELAY 3 (de-energised state)
NO Normally open
C Common
NC Normally closed
COMPRESSOR (Factory wired)
115V (White) 115V supply for the cleaning compressor
C (Purple) Common for the cleaning compressor
230V (Orange) 230V supply for the cleaning compressor
MAINS
L Live terminal for mains supply
N Neutral terminal for mains supply
E Earth terminal for mains supply
MSL600
Table (A): Connection descriptions reading from left to right (all via M20 cable glands)
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MSL600
3.6 Cable extension
The transducer is connected using ALPHA XTRA-GUARD4 P/N45272. The standard cable length is 10 metres.
This cable comprises of two twisted pairs with an overall screen and drain. The brown and red wires from the
transducer should be connected to one twisted pair. The black and white wire from the transducer should be
connected to the other twisted pair. The yellow from the transducer should be connected to the drain wire which
must be terminated at the screen (SCN) terminal on the PCB.
Fitting instructions for extending the MSL603 transducer cable are in section 14.
Note 1:
The standard 10 metres of cable should be sufficient for most installations. The maximum recommended
additional extension is 20m. Use only cable conforming to the specification given above and ensure any
connections are made using high grade screened connectors. For suitable specification connectors refer to
Mobrey Measurement customer support. It is the responsibility of the installer to ensure that any extension to the
cable must be suitable for its working environment.
Note 2:
The digital input, if used must be connected to switch relay contacts which are insulated to IEC6010 category III
(4kV impulse) with no exposed live parts.
February 2012
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February 2012
4. Programming
The following sections introduce the main display and use of the keypad (MSL600 only) for programming the
MSL600. Password protection to prevent unauthorized access is also discussed.
4.1 Display
The display is a 240 x 128 dot matrix LCD module with full graphics capability and LED back light. The LCD is
split into four parts, see Figure (8).
Figure (8): The LCD display layout
MSL600
• Upper left – In the upper left of the display is an icon representing the transducer and the unit tag
number. The tag number is user programmable via the HMI.
• Upper right – The HMI information is displayed in the upper right of the display. The HMI uses 4 lines
• Lower left – The lower left of the display shows the sonar echo profile from which the blanket position
is determined.
• Lower right – The lower right of the display shows the blanket level trend at minute intervals over the
last hour.
When the display is in the normal mode, trending is active and the m and o keys enable the user to view the last
12 hours of data, an hour at a time backwards and forwards respectively. The views are labelled with their start
and finish times. The sonar echo profile recorded at the corresponding start time is also displayed.
After reaching the oldest data the o key is inoperative. Where no data has been recorded there is a gap in the
trend line. A zero value is represented by a line a single-pixel thick. Pressing Esc returns to the real time normal
display.
Note: Do not confuse this trending with data logging which is discussed in more detail later.
The LCD has a back light for operator convenience. This has one of 3 modes selectable using the HMI:
• On permanently unless internal temperature too high, in which case automatically off.
• Off permanently unless internal temperature is too low, in which case automatically on.
• Auto - i.e. off until keypad is actuated, in which case on and stay on for, typically, 5 minutes - on for only 10
seconds if internal temperature too high.
The LCD on the MSL600 is supplemented by a single red LED which indicates the health of the unit. The LED
flashes every 2 seconds (½Hz) to indicate normal operation, whilst a steady illumination or no illumination
indicates a problem.
x 20 characters with each character 7 x 5 dots. In normal operation, the actual blanket
level is displayed here.
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MSL600
February 2012
4.2 Contrast (viewing angle) control
When the system is making measurements in normal mode the screen contrast or viewing angle can be adjusted.
Whilst holding down the Esc key press either the n or p key
Esc and - increases (darkens) the contrast and Esc and p decreases (lightens) the contrast.
4.3 Keypad and Menu Navigation
Data entry and interrogation is normally achieved using the integral membrane keypad on the MSL600 front
panel, see Figure (9).
Figure (9): Keypad layout
The keypad comprises 6 keys:
• Cursor keys (npmo)
• Enter key ()
• Escape key (Esc)
The four arrow keys allow navigation around the HMI menu structure and the Esc and keys allow movement
from one menu level to the next. Each time a key is pressed an audible “beep” is heard. This “beep” can be
turned off via the HMI if required.
To access the main menu (from the normal display, see section 4.1) press .
To access a menu option, highlight the option using the np keys and press .
To change a parameter the padlock in the on line/off line menu must be open. This is done by highlighting “Go off
Line” in the main menu and pressing . Press again and the padlock will open. Press again and the padlock
will close.
By pressing Esc repeatedly, the screen will always return to the normal display. Alternatively, pressing and
holding Esc for a few seconds will result in jumping straight back to the Main Menu screen.
If any key other than Esc is held pressed for more than 1 second then it auto repeats. This is particularly useful for
fast scrolling through parameters. Although the display does not show every parameter whilst fast scrolling (it is
only refreshed every 500ms), the key beep (if enabled) is actuated for each parameter.
Movement through the menu structure using the arrows is shown by the titles being highlighted and flashing, i.e.
reversed to showing clear letters on a black background and vice versa. Pressing with the title highlighted
enters that part of the menu.
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