Emerson IP2046IM, MSP400RH User Manual

Instruction & maintenance leaflet

IP2046IM, Rev. AA
November 2006

Mobrey

MSP400RH Series
Level Transmitter

MSP400RH

www.mobrey.com

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CONTENTS

Page

1. Introduction 3

2. The MSP400RH ultrasonic level transmitter 3

2.1 Type numbering system 3

2.2 Pressure Equipment Directive 4

2.3 Specifications 4

3. Installation 6

3.1 Location of the MSP400RH transmitter 6

3.1.1 General considerations 6

3.1.2 Liquid surface conditions 7

3.1.3 In-tank / well effects 8

3.1.4 Open Channel Flow installations 8

3.2 Mounting the transmitter above the liquid surface 10

3.3 Wiring 11

3.4 Additional components in the 2 wire loop 12

4. Commissioning / Programming 13

4.1 Display & push buttons 13

4.2 Power up 14

4.3 Programming - important notes 14

4.4 Setting up for the chosen application 15

4.5 Diagnostic data 27

4.6 Loop Test 28

4.7 Engineering Set-up menu 29

5. Maintenance 35

Appendices

Appendix A1 Main Menu - Programming 36
Appendix A2 Diagnostic Menu 38
Appendix A3 Commissioning / Loop test menu 39
Appendix A4 Engineering menu 40
Appendix B Default menu listing 41
Appendix C Listing of non-linear profiles in the MSP400 43
Appendix D Hart Communications with the MSP400 44

The MSP400 transmitter is a measuring instrument

and should be handled with due

care and attention at all times

Footnote :-

In this manual the following terms are used which refer to trademarks from other manufacturers:

HART: is the protocol adopted for the MSP400 SMART Communications.
HART is a registered trademark of the HART Communications Foundation and is a mnemonic For
Highway Addressable Remote Transducer.

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1.0 Introduction

The MSP400 ultrasonic level transmitter is designed to be mounted above a liquid and will measure the
distance to the liquid surface.
When programmed with details of the vessel, sump or open channel, the MSP400 will compute level,
contents or flow and give a 4-20mA signal proportional to the chosen variable. 2 relays are provided for
control functions. Programming is achieved using integral push buttons or by remote communication
using HART protocol.

MSP400 is a two wire 24V dc loop powered transmitter and may be connected to any suitable dc power
source using 2 core shielded cable. The Mobrey MCU900 range of Control Units is designed to
be used with the MSP400 transmitter in this way.

The MSP400 transmitter must not be mounted in a hazardous area, even if supplied from a protected
power supply.

2.0 The MSP400RH ultrasonic level transmitter.

The transmitter operates over a range of 0.45m to 11m. When powered up the transmitter will give a
4-20mA signal on the two wire power cable over the factory default range :

4mA at 11m; 20mA at 0.45m. This range may be adjusted during commissioning. See section 4.0

Models covered in this manual :

MSP400RH - B28
MSP400RH - N28

The transmitter is mounted using the 2” thread provided. An optional mounting bracket kit is available
on request. MSP-BRK2 (2” BSPT) or MSP-BRK3 (2” NPT).

2.1 Type numbering system

MSP Mobrey ultrasonic level transmitter

400R 11m operating range, 2 relay outputs

H HART communications

-B28 2” BSPT mounting, PVDF wetside

-N28 2” NPT mounting, PVDF wetside

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2.2 Pressure Equipment Directive

The MSP400RH transmitter does not fall within the PED definition as enclosing a pressurised fluid, so is
therefore outside the scope of the Directive.

Accordingly, the Declaration of Conformity does not list the Pressure Equipment Directive.

2.3 Specifications

Materials of construction:

Transducer material PVDF
Body & cover Material Glass filled nylon
Cable gland Nylon with Nitrile cable seal
Cover seal Silicone rubber
Cover screws 316 Stainless Steel

Transducer bodyseal EPDM

Electrical

Supply voltage 12-40V dc

Output 4-20mA (3.8 - 20.5mA linear)

Relays (2) : SPST rated 1A at 24Vdc
Communications HART Digital communications (Rev. 5)
Earthing None required
Recommended Cable Two core each 0.22 mm2 min, shielded
Max. cable length 3000m
Cable resistance 0.1 Ohm per metre length max.
Cable gland Suitable for cable sizes 4mm - 8mm diameter

Operating

Range 0.45 to 11m
Temperature

Ambient -40°C to +70°C

Wetside -30°C to +70°C
Pressure -0.25 bar to 3.0 bar
Weatherproofing IP66/IP67

Certification

The MSP400 range of products are Factory Mutual (Fm) certified as Process Control Equipment meeting
basic electrical, mechanical and fire protection requirements (IP66/IP67).

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-40 / +158°F

-40 / +70°C

Ambient

135

(5.3")

65

(2.6")

-30 / +70°C

Ø 144 (5.7")

-22 / +158°F

IP66 / IP67

2 x M20 conduit connections

1 x cable gland
1 x blanking plug

60mm A/F (2.4")

MSP400RH-B28 : 2" BSPT
MSP400RH-N28 : 2" NPT

MIN : 0.45m (18”)
MAX : 11.0m (433”)

-0,25 / +3,0bar

Wetside

-4 / +44psi

b.rEF

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3.0 Installation

Important safety notice : The MSP400 is designed for safe area use only, and must not be installed in a

hazardous area, even if the power is supplied through a barrier device.

General

a. Installation must be carried out by suitably trained personnel in accordance with the

applicable code of practice.

b. If the equipment is likely to come into contact with aggressive substances, it is the

responsibility of the user to take suitable precautions that prevent it from being adversely
affected, thus ensuring that the type of protection is not compromised.

Aggressive Substances – e.g. acidic liquids or gases that may attack metals or solvents that may

affect polymeric materials.

Suitable Precautions – e.g. regular checks as part of routine inspections or establishing from the

material’s data sheet that it is resistant to specific chemicals.

c. The equipment should only be cleaned with a damp cloth, do not use solvents.

d. The equipment is not intended to be repaired by the user and is to be replaced by an

equivalent certified unit. Repairs should only be carried out by the manufacturer or
approved repairer.

3.1 Location of the MSP400RH transmitter

Correct location of the transmitter is essential for the reliable operation of any ultrasonic level
measurement system.
Whilst the transmitter may be site tuned to deal with most application conditions, it is strongly
recommended that the following guidelines should be adopted wherever relevant.

3.1.1 General considerations

• The MSP400RH transmitter complies with the European Directive for Electro Magnetic Compatibility

(EMC) Class B.
It is not advisable to mount the transmitter in close proximity to a source of electrical noise such as a
variable speed drive or other high powered electrical device.

• The MSP400 should be mounted above the liquid surface using the “2” thread provided. To
facilitate mounting, a bracket kit is available. See Section 3.2.

Note : The MSP400 is designed to be mounted in a non-metallic fitting or flange. The use of
metallic fittings or flanges is not recommended.

• The transmitter should be mounted as near vertical as possible to ensure a good echo from the liquid
surface and maximum echo size received.
The beam angle (to the half power point) of the transmitter is 12 degrees inclusive.

Obstructions in the tank or well may generate echoes which can be confused with the real liquid
surface echo. Obstructions within the beam angle generate strong “false-echoes”; wherever possible,
the transmitter should be positioned such that false echoes are avoided.
To avoid detecting unwanted objects in the tank or well, it is advisable to maintain a distance of at
least 0.11m from the centre line of the transmitter for every metre range to the obstruction.

• If the transmitter is located near the side of the tank or well, there will be no false echo generated
provided the wall is smooth and free of protrusions. However, there will still be a reduction in the
echo size. To avoid large echo size loss, it is recommended that the transmitter never be mounted
closer than 0.3m to the wall.
Fatty, dirty or viscous liquids can cause a “scum line” to build-up on the tank or well wall. Avoid false
echoes from this by enabling “scum line prevention” software in the MCU control unit.

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Max 3°

(1.3"/ft)

0,11m/m

C

i.e. D Min = 0.45m (18”)

D Max = 11m (433”)
C = 0.3m (12”) min to 0.88m (36”)

D

• If the transmitter is mounted in an enclosed tank, avoid mounting the transmitter in the centre of the

tank roof as this could act as a parabolic reflector and create unwanted echoes. Avoid applications
where heavy condensation could form on the transducer face.

• If the transmitter is mounted in a stand-off or nozzle, it is always preferable that the transmitter face

be at least 5mm proud of the stand-off such that it protrudes beyond the stand-off and into the tank.
If this is not possible, see section 3.2.

• If the transmitter is used in environments where direct sunlight can cause very high surface

temperatures on exposed instruments, it is recommended that the installer should construct a
suitable sun-shade to protect against this.

• Remember that the minimum operating range of the transmitter is 0.45m. The transmitter will not

detect any liquid surface closer than 0.45m to the transmitter face.

3.1.2 Liquid surface conditions

• Foaming liquids can reduce the size of the returned echo as foam is a poor ultrasonic reflector. It is

always preferable to mount an ultrasonic transmitter over an area of clear liquid, such as near the
inlet to a tank or well. In extreme conditions, or where this is not possible, the transmitter may be
mounted in a vented stilling tube provided that the inside bore of the stilling tube is at least 100 mm
(4”) and is smooth and free from joints or protrusions. It is also preferable that the bottom of the
stilling tube does not become uncovered, thus preventing the ingress of foams.

• Beware of mounting the transmitter directly over any inlet stream.

• Liquid surface turbulence is not normally a problem unless it is excessive. In most cases, the effects

of turbulence are minor, with excessive turbulence being catered for by fine tuning the transmitter on
site if necessary.

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3.1.3 In-tank effects

• Stirrers or agitators can cause a vortex. Always try to mount the transmitter off-centre of any vortex to
maximise the return echo.
As stirrer blades become uncovered they will create echoes as they pass through the ultrasonic beam.
The transmitter can be tuned to ignore these false echoes on site.

• In non-linear tanks with rounded or conical bottoms, always mount the transmitter off-centre. In some
cases, it may be desirable to install a perforated reflector plate on the tank bottom directly under the
transmitter centre line to ensure a satisfactory return echo.

• Avoid mounting the transmitter directly above any pumps as the transmitter will detect the pump
casing as the liquid falls away. If this is not possible, fine tuning on site may be required to ignore
echoes from the pump casings.

3.1.4 Open Channel Flow installations.

There are normally two distinct parts to an open channel flow measurement system; the primary element
(flow structure) and the secondary element (Head measurement instrumentation).
For accurate open channel flow measurement, both parts of the system must be installed accurately.

This manual explains some key aspects of the installation of the secondary element, in this case the
ultrasonic transmitter.
For full details of the installation of a primary element such as a flume or weir, reference should be made
to the relevant British (BS3680) or International standard.

In the United Kingdom, Mobrey Ltd offers a complete installation and commissioning service for
open channel flow measurement systems. For further information contact the sales office and/or refer to
Mobrey’s ‘The Guide’.

Positioning of the transmitter is critical and should be the correct distance upstream from the flow
structure as stated in BS3680 e.g. a distance of 4 to 5 times Hmax for a thin plate weir or 3 to 4 times
Hmax for a flume.
For optimum accuracy, the front face of the transmitter should be positioned at a height that is at least
equal to the maximum flow depth plus the blanking distance of the transducer. A minimum distance of

0.46m is recommended.

Hmax + 0.46m

Hmax

It is important to note that the bottom reference of the transmitter should be related to the centre of the
invert of the primary device, NOT the distance to the channel bottom directly below the transmitter.

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Flow

Transmitter

front face

Channel invert

Primary device (eg.

flume, weir) invert

In addition to the above, when setting the bottom reference on a ‘V’ notch weir it is important that the
true invert of the weir is taken and not the meniscus liquid level, which may be 3 to 4mm (1/8”) above
the true invert.

Transmitter bottom

reference

Meniscus

True invert

• The liquid surface at the point of measurement must have a stable, smooth surface and uniform
approach velocity. It must not be affected by baffles, foam, hydraulic jumps or any other object
likely to cause flow disruption.

• The primary element should be free from any situation where it is likely to ‘drown’ (refer to relevant
standard for further information)

• The MSP400RH transmitter has integral temperature compensation and must be protected at all
times from direct sunlight and any radiated heat.
For maximum accuracy and stability of level measurement reading the transmitter should always be
shrouded to prevent the incidence of direct sunlight.
If the flow structure permits, mount the transmitter within the flow channel or chamber.
Alternatively, the MSP400RH transmitter can accept an input from an external temperature sensor.
See section 3.3.1.

If you are in doubt about any aspect of transmitter installation, contact Mobrey (Service

Division) who will be pleased to advise.

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3.2 Mounting the transmitter above the liquid surface.

A 2” thread is provided to mount the transmitter.
The user should check the thread form, which will be either 2” BSPT (MSP400RH-B28) or 2” NPT
(MSP400RH-N28). The thread form is clearly marked on the hexagon of the transducer body.

Note : The MSP400 is designed to be mounted in a non-metallic fitting or flange. The use of metallic
fittings or flanges is not recommended.

To help installation, a bracket kit is available from Mobrey. This comprises a Stainless Steel angle bracket
and PVC threaded disc which may be used to mount the MSP400 on a gantry or other support over the
liquid level. Order part number MSP-BRK2 (BSP) or MSP-BRK3 (NPT). The bracket may be bolted to a
suitable cross member above the liquid surface.

Ensure that the transmitter is perpendicular to the liquid surface to maximise the return echo size.

Check that the maximum liquid level will not encroach into the 0.45m blanking zone of the transmitter.

Note : To aid alignment, the echo size / signal strength can be displayed on the MCU900 control unit or
on the MSP400RH transmitter display. Refer to section 4 for details.

Use PTFE tape on the screw thread, tighten to hand tight + ¼ turn, using the Hexagon.

When installing on a vessel which has a nozzle or stand-off, and the transducer face does not protrude into
the vessel, note the dimensions in the diagram below and always ensure that the nozzle/vessel weld is
smooth and free from internal weld beads or other projections.

Use hexagon to
tighten to hand
tight + ¼ turn
DO NOT USE
HOUSING TO
TIGHTEN.

PTFE

(Teflon)

Min :
R3,0mm (1/8")

Max : 0,35m (14")

Min 0,15m (6")

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3.3 Wiring

The transmitter is supplied with cable gland suitable for cable sizes 4-8mm diameter.

Terminal 1 : +24V dc

2 : 0v dc
3 : RL1 (SPST)
4 : RL1 (SPST)
5 : RL2 (SPST)
6 : RL2 (SPST)
7 : MSP-RTP temperature probe (if used)
8 : MSP-RTP temperature probe (if used)

Earth Screen : Connect to a standard earth in the control room.

Max 3000m (9845ft)

Earth screen in
control room only

Twisted pair, screened

Ø 4 - 8mm
(0.15 - 0.31")

Min 0,22mm2 (25 SWG / 24 AWG)
Max 1,5mm2 (17 SWG / 15 AWG)

0V

+12-40V dc

3.3.1 External temperature sensor

The MSP400RH transmitter will accept an input from a Mobrey external temperature sensor.

Order part number MSP-RTP.
This is a thermistor based temperature sensor specifically designed for use with the MSP400RH
transmitter.
Full installation instructions are supplied with the temperature sensor, but note that it should be mounted
out of direct sunlight in a position such that it can give a representative reading of the air temperature
between the liquid surface and the MSP400RH transmitter.

3.3.2 After completing the wiring

Ensure all cable glands / blanking plugs and seals are in good condition after wiring to maintain the
weatherproof rating of the transmitter.

Check that the cover seal is in good condition and not twisted or misaligned in the seal location groove.
When replacing the cover, tighten the 3 cover screws evenly to exert uniform pressure on the cover seal.

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3.3.3 Relays

The MSP400RH transmitter has 2 integral relays which may be used for control purposes. These relays
are light duty and should be used as signal relays only, with control functions being performed by external
control relays.

Relay 2 is defaulted as a ‘fault’ relay, normally energised, but may be reconfigured on site as a set point
relay if required.

3.4 Additional components in the two wire loop.

3.4.1 Lightning / surge protection and other loop devices

It is allowable to fit loop powered or separately powered devices in the two wire loop provided that the
transmitter receives a minimum voltage of 12V dc at 21 mA loop current.

If the area is prone to lightning strikes or voltage surges, fitting of a suppressor device is desirable
between the transmitter and the control unit.

3.5 Wiring to allow HART communication

If it is intended to use HART digital communications with the MSP400RH transmitter, a 250 Ohm 0.25W
load resistor must be installed in the loop.

When used with the Mobrey MCU900 family of Control Units, there is no need to install an
external load resistor in the loop as there is a suitable resistor built in to the Control Unit.

If the transmitter is being supplied through a safety barrier, ensure the type chosen will pass HART/
SMART information.

Once installed, a HART communicator can be connected across the load resistor, or across the loop at
any point downstream of the load resistor.

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4.0 Commissioning, programming and operation

The MSP400 operates from a menu of parameters, each held in a specific memory location within the
instrument. The memory locations may be pictured as a matrix, and the user navigates to each parameter
to programme the instrument using ↓ and → steps.
Refer now to the Main Menu structure shown in Appendix A

The MSP400 leaves the factory pre-programmed with a value in each parameter location such that , when
the power is first applied, the instrument will give a sensible reading. A list of default values is given in
the parameter listing in Appendix B.

The MSP400 is HART enabled, allowing remote communications with the instrument.
The instrument can therefore be either programmed using a suitable HART compatible master, or may be
programmed locally using the push buttons provided inside the instrument. For details of local
programming, continue reading this section. For details of HART communications, refer to Appendix D.

4.1 Display and push buttons.

D
L

Alarm
Fault

C
F

Button Colour : Green Blue Red

The main display allows display of up to 5 characters, which in the normal run mode will be the
measurement, termed the Primary Variable (PV) of the instrument, or in the programming mode will be
data to assist in programming.

To the left of the main display are 4 arrow icons, only one of which will be illuminated at any one time to
indicate the duty chosen by the user.

gal/m3/hrft3/hringal/s @max

↓↓↓

→→→

↵↵↵

To the right of the main display are 2 arrow icons which indicate the status of the transmitter relays.
When illuminated, they indicate that the relay contact is closed.

Under the main display is a text string which allows display of the units of measurement. The instrument
will illuminate only those characters applicable to the units of measurement chosen.

To the right of the text string is an echo received icon made up of 3 arc segments which continuously
indicate the strength of the echo received (minimum, average and good)

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4.2 Power up

On power up, the MSP400 will take a few seconds to initialise. The display will run through a set-up
routine, first illuminating all display characters then showing the software revision number. Once checks
are complete, the display will show the Primary Variable (PV) determined based upon the factory default
values in the memory.

On a new instrument aimed at a good target, this will be what the MSP400 calculates as a level reading
based upon the default value for the bottom reference.
The duty icon against the letter L on the top plate and the RL2 icon will be illuminated.
It is possible that the RL1 icon may be illuminated depending upon the level calculated by the MSP400
at this time.

The MSP400 is now ready for use, and the next step is to programme the unit with details of the
application.

The MSP400 may be programmed either in-situ or prior to installation. All programmed data is retained in
the MSP400 memory after power off.

4.3 Programming- Important notes to help you programme the MSP400

• Do not allow rain or water to enter the MSP400 whilst programming or damage to the circuit boards

will occur.

• Use the push buttons as instructed below to navigate through the programming menu and select or

enter application data.
It is recommended that use of the push buttons is firm but not overly so to prevent damage to the
circuit boards below, and that the user should not press buttons too fast to avoid incorrect data entry.
Simply holding down the green button ↓ will automatically scroll through any option list without the
need for repeated pressing of the button.

• Pressing the red button ↵ at any time will step the user back to the previous level in the menu.
Note, if the red button ↵ is pressed after a menu option selection has been made or new data has
been entered, this option selection or new data will automatically be saved.

• Whilst programming should be simple and intuitive, it may be that the user wishes to start again or
may wish to clear the memory of site entered data from a previous application. The MSP400 has a
“re-set default values” routine which allows the user to reload the MSP400 memory with the factory
default values as shown on the menu structure. Refer to section 4.7.10.

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4.4 Setting up for the chosen application - the Main Menu.

Refer now to the main menu structure chart in Appendix A.

It is important to note that MSP400 programming is most easily accomplished by first selecting the duty
the transmitter is to perform.
Once a duty is selected (see section 4.4.1), a “mini-wizard” programming assistant is invoked and the
user is thereafter only asked for information relevant to the duty chosen. As the user is guided through the
menu, data input allows the mini-wizard to populate relevant parameters with application specific data in
the background, and then select the next step required to configure the transmitter for the chosen
application.

The user is strongly advised to enter the duty menu whenever programming the MSP400, thus invoking
the mini-wizard which will assist programming.

Once programmed, it is possible to review the data entered into or calculated by the MSP400 by stepping
through the main menu using the green button ↓.

Note however that this will be a manual navigation of the MSP400 menu, and that

all

menu items will be
shown in this procedure, regardless of the duty chosen; the mini-wizard is only invoked if the user enters
and scrolls through or selects/refreshes a duty choice.
In a manual navigation down the main menu, simply ignore those menu items shown that do not relate to
your application.

4.4.1 Selecting the duty: Screen display: dutY

Factory default setting: Level

The MSP400 may be programmed to perform one of 4 duties:

• Distance measurement

• Level measurement (factory default setting)

• Flow measurement

• Contents measurement

To change the duty:

a) Press the green button ↓ to display the “dutY” menu entry screen.

b) To confirm or change the duty from Level to one of the other duties, thus invoking the mini-wizard,

press the blue button → to enter the “dutY” menu. Press the blue button → again to allow change of
the duty. The current duty will now be flashing, indicating it may be confirmed or changed.

c) Press the green button ↓ to scroll through the list of available duty options, or press the red button ↵ if

the duty displayed is correct

d) Once the desired duty is shown (flashing) on the display, press the blue button → to select this duty. It

will now stop flashing.

e) If the chosen duty is incorrect, the edit sequence for the duty can be re-started by pressing the blue

button → again.

If the chosen duty is correct, press the red button ↵ to save the duty to memory and automatically
scroll on to the next main menu option: units.

Note that the arrow icon to the left of the display will now show the duty chosen and saved.

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