MDM50
Standard Version
User’s Manual
97475 Issue 1.3
March 2016
Please fi ll out the form(s) below for each instrument that has been purchased.
Use this information when contacting Michell Instruments for service purposes.
Instrument
Code
Serial Number
Invoice Date
Location of Instrument
Tag No
Instrument
Code
Serial Number
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Serial Number
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MDM50
For Michell Instruments' contact information please go to
www.michell.com
© 2016 Michell Instruments
This document is the property of Michell Instruments Ltd. and may not be copied or
otherwise reproduced, communicated in any way to third parties, nor stored in any Data
Processing System without the express written authorization of Michell Instruments Ltd.
MDM50 LP Version User’s Manual
Contents
Safety ................................................................................................................................ v
Electrical Safety ........................................................................................................... v
Pressure Safety ............................................................................................................ v
Toxic Materials ............................................................................................................. v
Repair and Maintenance ............................................................................................... v
Calibration ................................................................................................................... v
Safety Conformity ........................................................................................................ v
Abbreviations ......................................................................................................................vi
Warnings ............................................................................................................................vi
1 INTRODUCTION ................................................................................................1
2 INSTALLATION ..................................................................................................2
3 OPERATION ......................................................................................................3
3.1 General Operation .............................................................................................. 3
3.2 Atmospheric or Line Pressure Measurements ........................................................ 4
3.3 Measuring Dew Points Below -40°C (-40°F) .......................................................... 5
3.4 User Controls ..................................................................................................... 6
3.5 4-20 mA Output Socket Wiring ............................................................................ 7
4 GOOD MEASUREMENT PRACTICE .......................................................................8
5 MAINTENANCE ................................................................................................12
5.1 Calibration ....................................................................................................... 12
5.2 Transmitter / Battery Replacement ..................................................................... 12
5.3 Filter Cartridge Replacement ............................................................................. 14
5.4 Checking the MDM50 Electronics Calibration ....................................................... 14
5.5 List of Spares ................................................................................................... 14
5.6 Troubleshooting ................................................................................................ 15
Figures
Figure 1 Interchangeable Gas Inlet/Outlet Fittings .....................................................4
Figure 2 User Controls .............................................................................................6
Figure 3 Jack Plug Wiring .........................................................................................7
Figure 4 2-Wire Connection - View Showing Rear of Connector Terminal Block ...........14
Appendices
Appendix A Technical Specifi cations .............................................................................. 17
Appendix B EU Declaration of Conformity......................................................................19
Appendix C Quality, Recycling & Warranty Information ...................................................21
C.1 Pressure Equipment Directive (PED) 97/23/EC ............................... 21
C.2 Recycling Policy ..........................................................................21
C.3 WEEE Compliance ........................................................................ 21
C.4 RoHS2 Compliance ......................................................................22
C.5 Warranty ..................................................................................... 22
C.6 REACH Compliance ...................................................................... 23
C.7 Return Policy ............................................................................... 23
C.8 Calibration Facilities .....................................................................24
C.9 Manufacturing Quality .................................................................. 24
C.10 FCC (EMC Requirements for North America) ..................................24
Appendix D Decontamination Declaration ...................................................................... 26
iv 97475 Issue 1.3, March 2016
MDM50 LP Version User’s Manual
Safety
The manufacturer has designed this equipment to be safe when operated using the procedures
detailed in this manual. The user must not use this equipment for any other purpose than that
stated. Do not apply values greater than the maximum value stated.
This manual contains operating and safety instructions, which must be followed to ensure the safe
operation and to maintain the equipment in a safe condition. The safety instructions are either
warnings or cautions issued to protect the user and the equipment from injury or damage. Use
qualifi ed personnel and good engineering practice for all procedures in this manual.
Electrical Safety
The instrument is designed to be completely safe when used with options and accessories supplied by
the manufacturer for use with the instrument. The instrument is powered by an internally mounted
rechargeable battery. The input power supply voltage limits for the battery charger supplied with the
instrument are 90 to 264 V AC, 47/63 Hz.
NOTE: No other battery charger unit, other than that supplied with the instrument
should be used.
NOTE: Do not allow the battery to fully discharge.
Pressure Safety
DO NOT permit pressures greater than the safe working pressure to be applied to the instrument.
The specifi ed safe working pressure is 20 barg (290 psig). Refer to the Technical Specifi cations in
Appendix A.
Toxic Materials
The use of hazardous materials in the construction of this instrument has been minimized. During
normal operation it is not possible for the user to come into contact with any hazardous substance
which might be employed in the construction of the instrument. Care should, however, be exercised
during maintenance and the disposal of certain parts.
Repair and Maintenance
The instrument must be maintained either by the manufacturer or an accredited service agent. Refer
to www.michell.com for details of Michell Instruments’ worldwide offi ces contact information.
Calibration
The recommended calibration interval for the MDM50 is one year, unless otherwise specifi ed by Michell
Instruments Ltd. The instrument should be returned to the manufacturer, Michell Instruments, or one
of their accredited service agents for re-calibration (go to www.michell.com for contact information).
Safety Conformity
This product meets the essential protection requirements of the relevant EU directives. Further
details of applied standards may be found in the product specifi cation.
Michell Instruments v
Abbreviations
!
The following abbreviations are used in this manual:
AC alternating current
atm pressure unit (atmosphere)
barg pressure unit (=100 kP or 0.987 atm) gauge
°C degrees Celsius
°F degrees Fahrenheit
dp dew point
ft feet
kg kilogram
lb pound
MDM50 LP Version User’s Manual
mA milliampere
m meter
mm millimeter
MPa megapascal
Nl/min normal liters per minute
psig pound(s) per square inch (gauge)
scfh standard cubic feet per hour
μm micrometer
Ω ohm
V Volts
Warnings
The following general warnings listed below are applicable to this instrument. They are
repeated in the text in the appropriate locations.
Where this hazard warning symbol appears in the following
sections, it is used to indicate areas where potentially hazardous
operations need to be carried out.
vi 97475 Issue 1.3, March 2016
MDM50 LP Version User’s Manual
1 INTRODUCTION
The MDM50 comprises a fast responding polymer sensor fi tted into a sample block with
an integrated fi lter cartridge, and Legris push fi ttings or optional Swagelok® tube fi ttings
on the gas inlet and outlet. The measured dew point from the sensor is shown on the
clear red LED display on the front panel of the instrument.
The MDM50 can be supplied with either °C or °F dew-point measurement units.
A 4-20 mA analog output is provided for connection to a chart recorder, data-logger or
computer system, so dew-point trends can be analyzed over time.
The electronics are housed in a rugged Peli case, providing NEMA 6 protection when the
lid is closed. The case is supplied with a lifetime guarantee.
INTRODUCTION
The MDM50 is powered by a rechargeable NiMH battery pack, giving between 12 and
16 hours of measurement time from a full charge. The instrument is delivered complete
with a universal battery charger stored in the lid. It takes 16 hours to fully charge the
battery pack, during which time the instrument can be switched on or off. The charger is
suitable to connect power to the instrument indefi nitely, but it is recommended to allow
the battery pack to go through a full charge-discharge cycle at least once per month. A
battery charge indicator on the instrument front panel warns when the battery is low.
MDM50 polymer moisture sensors are subject to a 9-point calibration, where their
performance is characterized against a fundamental reference hygrometer. This process,
and subsequent quality testing, ensures that all sensors behave optimally before they
are used in the fi eld. Each MDM50 is supplied with a calibration certifi cate traceable to
national standards (NIST) from Michell Instruments' accredited laboratory.
Michell Instruments 1
INSTALLATION
2 INSTALLATION
On delivery, please check that all the following standard components are present in the
packing box:
• MDM50
• 2m of 6mm O/D PTFE tube
• Battery charger
• Mains lead
• 3 pole ¼” jack plug (inside lid) - for analog output connections
• User manual
• Certifi cate of calibration
MDM50 LP Version User’s Manual
Before using the MDM50 for the fi rst time it is recommended that the battery pack is
charged for a minimum of 12 hours.
The case has a pressure relief valve on the exterior below the handle. When closed,
the case is completely sealed. If the instrument is taken through altitude changes, a
pressure differential will occur within the case. If this occurs: Before opening the lid,
open the black pressure relief valve by one turn (anti-clockwise) for a few seconds. This
will equalize the pressures. When the case has been opened, ensure that the pressure
relief valve has been fully closed.
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!
3 OPERATION
Maximum operating pressure is 20 barg (290 psig).
It is important that the gas fi ttings are correctly tightened, and
any tubing is secure in the push fi ttings before use.
Failure to do so will affect the instrument's pressure rating.
3.1 General Operation
To operate the MDM50, follow these instructions:
OPERATION
1. Ensure that all gas fi ttings are fully tightened before use.
2. Gas under test should be restricted to fl ow rates between 1 and 5 Nl/min
(2 and 10.6 scfh) and pressures from atmospheric to 2 MPa (20 barg (290
psig)).
3. Connect the sample gas supply line to the instrument
4. Connect the sample gas vent line to the instrument
5. Switch the instrument on. The display will begin to change as the sensor
responds to the applied dew point.
6. Allow the gas to fl ow until the display shows a stable reading. Typically
this would be around 5 to 15 minutes for spot checks at dew points of
-40°C (-40°F) and above.
7. Switch the unit off and disconnect the sample lines.
NOTE: Filters are essential for potentially dirty/contaminated gases – the
fi tted fi lter should be checked before and after use and replaced regularly - as
required.
Gas In port.
Gas Out port.
Michell Instruments 3
OPERATION
!
MDM50 LP Version User’s Manual
3.2 Atmospheric or Line Pressure Measurements
The MDM50 is supplied with two labelled, interchangeable, gas inlet/outlet fi ttings.
Number Description
1 4mm free fl ow fi tting
2 0.4mm restricted fi tting
Figure 1
§
§
2
Gas Out
LINE PRESSURE
1
Gas Out
ATMOSPHERIC
1
Filter Fitted
2
Filter Fitted
Interchangeable Gas Inlet/Outlet Fittings
§
§
Gas In
Gas In
In order to perform measurements at line pressure, the restricted fi tting should be on
the gas outlet port.
To perform measurements at atmospheric pressure, the restricted fi tting should be on
the gas inlet port.
The Gas In port is ALWAYS on the right hand side.
4 97475 Issue 1.3, March 2016
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3.3 Measuring Dew Points Below -40°C (-40°F)
Due to the signifi cantly lower levels of moisture present at dew points of this level, and
the increased amount of time to dry the system out, the response times of the sensor
will be signifi cantly increased. The table below offers an approximate guide to the
times taken for the instrument to stabilize at a given dew point (from a starting point
of 10°Cdp (50°Fdp) ambient):
OPERATION
Target Dew Point
°C °F
-30 -22 5
-40 -40 15
-50 -58 30
T100 Response Time
(mins)
Michell Instruments 5
OPERATION
3.4 User Controls
MDM50 LP Version User’s Manual
2
1
MDM50 Portable Hygrometer
h
Power Fuse
°Cdp
4-20
Battery
Gas In
To measure
line
pressure
atmospheric
pressure
Gas Out
at
§
§
21
21
Gas Out
§
34
h
h
o
-
Battery
Charger
h
mA
O/P
BATTERY
Level
Filter Fitted
h
h
h
5
6
h
Gas In
§
7
Figure 2
User Controls
Indicates the measured dew point in °C from -50 to +20 (-58 to
+68°F).
Under certain conditions the following error messages may be
1 Digital Display
displayed:
ErrL = Transmitter under range
ErrH = Transmitter over range
Err I = Sensor fault or transmitter disconnected
2 Power Switch Switches the MDM50 ON or OFF.
This 1A quick blow fuse provides protection for the display
3 Fuse
NiMH Battery
4
Pack
Analog Output
6
Socket
7 Gas Fittings
electronics in the event of a fault with the charger or battery pack.
Another protection fuse is located on the display PCB.
Located in the top right hand corner of the instrument, it can be
accessed by removing two screws (5). The battery pack can be
recharged using the supplied charger, via the battery-charging
socket and should be recharged whenever the battery level
meter is in the red region. See Section 5.6 for troubleshooting
information.
The battery pack will charge if the instrument is switched ON or
OFF. However, the battery level meter will only indicate when the
instrument is switched on.
The MDM50 features an analog output socket that provides
a linear 4-20 mA current loop, scaled to -60 to +60°C (-76 to
+140°F) dew point. This allowed the instrument to be connected
to a chart recorder, data logger or PC to enable dew-point trends
to be analyzed over time. For wiring information see Section 3.5.
The MDM50 can be used for measurements at line pressure (up to
20 barg (290 psig)) or atmospheric pressure. Legris push fi ttings
are supplied for use with 6mm OD PTFE tubing or, optionally,
®
Swagelok
tube fi ttings for use with 6mm or ¼" OD stainless steel
tube. There is a 32mm particulate fi lter (99.5% removal of 0.1
micron particles) fi tted as standard under the
Gas In port position.
6 97475 Issue 1.3, March 2016
MDM50 LP Version User’s Manual
3.5 4-20 mA Output Socket Wiring
The MDM50 provides a linear 4-20 mA output scaled from -60 to +60°C (-76 to +140°F).
The socket accepts a 3 pole ¼” jack plug (supplied) and should be wired as shown
below:
OPERATION
+VE
-VE
j
j
Figure 3
-VE
h
Jack Plug Wiring
+VE
h
Michell Instruments 7
GOOD MEASUREMENT PRACTICE
MDM50 LP Version User’s Manual
4 GOOD MEASUREMENT PRACTICE
Measurement of moisture content is a complex subject, but does not need to be diffi cult.
This section aims to explain the common mistakes made in measurement situations, the
causes of the problem, and how to avoid them. Mistakes and bad practices can cause
the measurement to vary from the expectation; therefore a good sampling technique is
crucial for accurate and reliable results.
Transpiration and Sampling Materials
- 20
- 30
- 40
- 50
Dew point (ºC)
- 60
- 70
12345
nickel
stainless steel
Time (hours)
nylon
copper
polyethylene
PTFE
All materials are permeable to water vapor, as the water molecule is extremely small
compared to the structure of solids, even when compared to the crystalline structure of
metals. The graph to the right shows the dew point inside tubing of different materials
when purged with very dry gas, where the exterior of the tubing is in the ambient
environment.
Many materials contain moisture as part of their structure, particularly organic materials
(natural or synthetic), salts (or anything which contains them) and anything which
has small pores. It is important to ensure that the materials used are suitable for the
application.
If the partial water vapor pressure exerted on the outside of a compressed air line is
higher than on the inside, the atmospheric water vapor will naturally push through the
porous medium causing water to migrate into the pressurized air line. This effect is
called transpiration.
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Adsorption and Desorption
Adsorption is the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved
solid to the surface of a material, creating a fi lm. The rate of adsorption is increased at
higher pressures and lower temperatures.
Desorption is the release of a substance from or through the surface of a material. In
constant environmental conditions, an adsorbed substance will remain on a surface
almost indefi nitely. However, as the temperature rises, so does the likelihood of
desorption occurring.
In practical terms, as the temperature of the environment fl uctuates, water molecules
are adsorbed and desorbed from the internal surfaces of the sample tubing, causing
small fl uctuations in the measured dew point.
GOOD MEASUREMENT PRACTICE
Sample Tubing Length
The sample point should always be as close to the critical measurement point as possible,
in order to obtain a truly representative measurement. The length of the sample line to
the instrument should be as short as possible. Interconnection points and valves trap
moisture, so using the simplest sampling arrangement possible will reduce the time it
takes for the sample system to dry out when purged with dry gas.
Over a long tubing run, water will inevitably migrate into any line, and the effects of
adsorption and desorption will become more apparent. It is clear from the graph shown
above that the best materials to resist transpiration are stainless steel and PTFE.
Trapped Moisture
Dead volumes (areas which are not in a direct fl ow path) in sample lines, hold onto
water molecules which are slowly released into the passing gas; this results in increased
purge and response times, and wetter than expected readings. Hygroscopic materials
in fi lters, valves (e.g. rubber from pressure regulators) or any other parts of the system
can also trap moisture.
Michell Instruments 9
GOOD MEASUREMENT PRACTICE
Sample Conditioning
Sample conditioning is often necessary to avoid exposure of sensitive measuring
components to liquids and other contaminants which may cause damage or affect the
accuracy over time, depending on the measurement technology.
Particulate fi lters are used for removing dirt, rust, scale and any other solids that may
be in a sample stream. For protection against liquids, a coalescing fi lter should be used.
The membrane fi lter is a more expensive but highly effective alternative to a coalescing
fi lter. It provides protection from liquid droplets, and can even stop fl ow to the analyzer
completely when a large slug of liquid is encountered.
Condensation and Leaks
MDM50 LP Version User’s Manual
Dewpoint > T Dewpoint < T
Maintaining the temperature of the sample system tubing above the dew point of the
sample is vital to prevent condensation. Any condensation invalidates the sampling
process as it changes the water vapor content of the gas being measured. Condensed
liquid can alter the humidity elsewhere by dripping or running to other locations where
it may re-evaporate.
The integrity of all connections is also an important consideration, especially when
sampling low dew points at an elevated pressure. If a small leak occurs in a high
pressure line, gas will leak out but vortices at the leak point and a negative vapor
pressure differential will also allow water vapor to contaminate the fl ow.
10 97475 Issue 1.3, March 2016
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!
!
Flow Rates
Theoretically fl ow rate has no direct effect on the measured moisture content, but in
practice it can have unanticipated effects on response speed and accuracy. The optimal
fl ow rate varies depending on the measurement technology, and can always be found
in the instrument or transmitter manual.
An inadequate fl ow rate can:
• Accentuate adsorption and desorption effects on the gas passing
through the sampling system.
• Allow pockets of wet gas to remain undisturbed in a complex sampling
system, which will then gradually be released into the sample fl ow.
• Increase the chance of contamination from back diffusion: ambient air
that is wetter than the sample can fl ow from the exhaust back into the
system. A longer exhaust (sometimes called a pigtail) can also help
alleviate this problem.
GOOD MEASUREMENT PRACTICE
• Slow the response of the sensor to changes in moisture content.
An excessively high fl ow rate can:
• Introduce back pressure, causing slower response times and
unpredictable effects on equipment such as humidity generators.
• Result in a reduction in heating capabilities of the sensor tile during the
initialization period. This is most apparent with gases that have a high
thermal conductivity such as hydrogen and helium.
Which Gases to Measure?
The MDM50 is suitable for measurement of the moisture content of a wide variety
of gases. In general, if the gas (in conjunction with water vapor) is not corrosive to
ceramics or base metals then it will be suitable for measurement.
POSSIBLE INJURY! The tubing, valves and other apparatus
attached to this instrument must be adequate for the
maximum pressure which will be applied, otherwise physical
injury to the operator or bystander is possible.
Before disconnecting the MDM50 from the gas line it is
essential to vent the system to atmospheric pressure,
otherwise severe injury could result.
Michell Instruments 11
MAINTENANCE
5 MAINTENANCE
Routine maintenance of the MDM50 is confi ned to regular re-calibration of the internal,
removable SF72 transmitter and replacement of the fi lter cartridge.
5.1 Calibration
The calibration of the internal transmitter is traceable to national standards. For this
reason it should only be calibrated in an accredited, e.g. UK
Service (UKAS)
laboratory. If these facilities do not exist it is recommended that the transmitter is
returned to the manufacturer, Michell Instruments, or an approved agent. A calibration
certifi cate bearing a seven-point calibration is issued with each transmitter.
In most applications, annual re-calibration ensures that the stated accuracy of the SF72
transmitter is maintained.
or US
MDM50 LP Version User’s Manual
United Kingdom Accreditation
National Institute of Standards and Technology
(NIST) standards
5.2 Transmitter / Battery Replacement
To remove the transmitter, or battery pack:
1. Ensure instrument is switched off and that the battery charger, current
output and any sampling components are also disconnected.
2. Remove and retain the 10 cross-head screws from the top plate.
3. Lift the small battery pack cover in the top right corner of the instrument.
A small fl at bladed screwdriver may be required to gently pry the edges
of the cover if it has become stuck to the waterproof seal underneath.
Removing this cover fi rst will make it easier to lift the entire top panel out
of the instrument.
4. Lift the top plate of the instrument out of the case. Disconnect the battery
pack before removing the top plate completely to prevent it from straining
on the attached cable. If only replacing the battery pack, do not follow
the next two steps.
5. Undo the screw from the centre of the transmitter connecting plug and
pull off the connector.
6. Unscrew the transmitter from the block.
Fitting the replacement is simply a reversal of the above procedure. When fi tting a new
transmitter it may be necessary to change the alignment of the GDSN connector (see
next page).
12 97475 Issue 1.3, March 2016
MDM50 LP Version User’s Manual
If the front panel prevents the connector from fi tting onto the transmitter, follow the
instructions below:
• Completely unscrew the cable gland on the GDSN connector to release
the cable tension.
• Remove the locking screw from the back of the connector (retaining the
metal O-ring).
MAINTENANCE
• Remove the connector block using a small screwdriver.
• Rotate the connector block and push it back into the connector housing.
Take care not to trap any wires against the hole for the locking screw.
X
Michell Instruments 13
MAINTENANCE
• Replace the locking screw and cable gland.
5.3 Filter Cartridge Replacement
Unscrew the gas inlet fi tting to reveal the fi lter, which can then simply be removed for
checking or replacement.
MDM50 LP Version User’s Manual
5.4 Checking the MDM50 Electronics Calibration
PIN 1
PIN 3
Figure 4
To verify if the display electronics are within calibration a 4-20mA current source can be
connected in place of the transmitter.
At 4 mA the display should show -60.0°Cdp ±0.5°C (-76.0°Fdp ±0.9°F)
At 20 mA the display should show +60.0°Cdp ±0.5°C (+140.0°Fdp ±0.9°F)
If the displayed values are outside of this range, please contact Michell Instruments'
Service Department.
2-Wire Connection - View Showing Rear of Connector Terminal Block
h
(GND)
Screen/Shield
Optional
Supply
4-20 mA
h
5.5 List of Spares
P/N Description
SSF-PF-10PK Pack of 10 particulate fi lter cartridges
MDM50-BAT Replacement battery pack
MDM50-CHR Replacement battery charger
14 97475 Issue 1.3, March 2016
MDM50 LP Version User’s Manual
5.6 Troubleshooting
Symptom Cause Actions
Transmitter disconnected
or sensor element /
sensor thermistor fault.
MAINTENANCE
Check transmitter cable is securely
connected inside instrument.
Display shows “
Display shows “
Display shows “ErrH”
ErrI”
ErrL”
NOTE: This error is
normally displayed
during the fi rst few
seconds while the
instrument is starting
up.
Transmitter reading
under-range.
Transmitter current
signal
< 4mA.
Transmitter element
open circuit.
Transmitter reading
over-range.
Transmitter current
signal > 20mA.
Sensor element short
circuit.
Check instrument electronics with
4-20mA source.
Exchange transmitter.
Check instrument electronics with
4-20mA source.
Exchange transmitter.
Sensor may have been exposed
to saturation conditions or liquid
contamination. Check that fi lter and
sensor guard are clean and dry.
If liquid water has contacted sensor,
or sensor block, then disassemble
and dry thoroughly. After drying, it
is recommend to purge assembled
instrument with very dry (-75°Cdp
(-103°Fdp) / 1ppm
12 to 24 hours.
Exposure to other contaminants can
cause lasting damage and may require
transmitter to be exchanged.
moisture) air for
V
Check instrument electronics with
4-20mA source.
Display fl ickers on
and off
Display off but
battery meter full
Battery voltage low. Connect charger.
Battery voltage low. Connect charger.
Michell Instruments 15
APPENDIX A
MDM50 LP Version User’s Manual
Appendix A
Technical Specifi cations
16 97475 Issue 1.3, March 2016
MDM50 LP Version User’s Manual
Appendix A Technical Specifi cations
Performance
Measurement Technology Polymer Capacitive
Measurement Range -50 to +20°Cdp (-58 to +68°Fdp)
Accuracy ±2°Cdp (±3.6°Fdp)
Run time 12 - 16 hours
Charge time 16 hours for maximum charge
Flow Rate 1 to 5 Nl/min (2.1 to 10.5 scfh)
Electrical Input/Output
Output
Power Supply Rechargeable NiMH battery pack, charger included
Operating Conditions
Operating Temperature -20 to +50°C (-4 to +122°F)
Storage Temperature -40 to +75°C (-40 to +167°F)
Operating Pressure Up to 2 MPa (20 barg (290 psig))
4-20 mA current maximum load
resistance 400 Ω
APPENDIX A
Mechanical Specifi cations
Display Flush mounted 3.5 digit red LED
Case
Weight 4kg (8.8lbs) total weight
Enclosure Rating
Case Closed
Sample Connections Push fi t penumatic fi ttings for gas inlet/outlet
Sample Block
Filter Cartridge
Sample Tubing 2m (6.6ft) of 6mm O/D PTFE supplied
Yellow propylene with charger, sample tubing and output connector
stored in the lid
NEMA Type 6
Stainless steel, fully self-contained sample system using a standard
drop-in cartridge
Removes 99.5% of particles ≥ 0.3 μm supplied with cartridge
installed. Spare cartridges are available (part no: SSF-PF-10PK)
Michell Instruments 17
APPENDIX B
MDM50 LP Version User’s Manual
Appendix B
EU Declaration of Conformity
18 97475 Issue 1.3, March 2016
MDM50 LP Version User’s Manual
Appendix B EU Declaration of Conformity
APPENDIX B
Michell Instruments 19
APPENDIX C
MDM50 LP Version User’s Manual
Appendix C
Quality, Recycling
& Warranty
Information
20 97475 Issue 1.3, March 2016
MDM50 LP Version User’s Manual
APPENDIX C
Appendix C Quality, Recycling & Warranty Information
C.1 Pressure Equipment Directive (PED) 97/23/EC
The above Directive has been implemented in United Kingdom Law by the Pressure Equipment
Regulations 1999.
The Regulations require that all pressure equipment and assemblies within the scope of the Pressure
Equipment Directive must be safe when placed on the market or put into service.
Michell Instruments’ products have been assessed and, as referenced against the Classifi cation Charts
detailed in Annex II of the Directive, do not fall into the requirements for CE marking compliance
with the Pressure Equipment Directive.
Article 3, paragraph 3 states that any product containing a pressurized fl uid that does not qualify for
compliance should, nevertheless, be constructed with Sound Engineering Practice (SEP).
Michell Instruments attests here that its products have been designed, manufactured & tested to
assure safe operation, and in accordance with Sound Engineering Practices.
C.2 Recycling Policy
Michell Instruments is concerned with the protection of the environment. It is our commitment to
reduce and eliminate from our operations, wherever possible, the use of substances which may be
harmful to the environment. Similarly, we are increasingly using recyclable and/or recycled material
in our business and products wherever it is practical to do so.
To protect natural resources and to promote material reuse, please separate batteries from other
types of waste and recycle responsibly. If batteries are not properly disposed of, these substances
can cause harm to human health and the environment.
The product that you have purchased may contain recyclable and/or recycled parts and we will be
happy to provide you with information on these components if required. For further information
please see the following sections.
C.3 WEEE Compliance
Directive 2012/19/EU 4 July 2012 on Waste Electronic and Electrical Equipment (WEEE)
The Waste Electronic and Electrical Equipment (WEEE) Directive places rules upon European
manufacturers of electrical and electronic equipment. The directives’ aim is to reduce the impact
that electronic devices have on the environment.
Michell Instruments is in full compliance with the WEEE Directive and is registered with an approved
recycler (Registration No. WEE/JB0235YW) and treats the requirement of the directive and the
protection of the environment with the utmost importance. All Michell Instruments’ products are
appropriately marked indicating their requirement for recycling.
It may be required to return certain instruments for treatment at the end of their working life.
Feb 2013
Michell Instruments 21
APPENDIX C
C.4 RoHS2 Compliance
Directive 2011/65/EU of the European Parliament and of the Council of 8 June 2011
The Restriction of Hazardous Substances (RoHS) Directive places rules upon European manufacturers
of electrical and electronic equipment. The directives’ aim is to reduce the impact that electronic
devices have on the environment.
According to the EC Directive 2002/95/EC, Michell Instruments’ products qualify as Category 9,
Control and Monitoring Equipment. Under the 2002/95/EC Directive, Category 9 products are exempt
from compliance with the Directive.
However, the careful design of all Michell Instruments’ products takes into consideration the
requirements of the Directive and, wherever possible, compliance is achieved. All future products
will be developed entirely using compliant materials. Furthermore, Michell Instruments is taking
active steps to remove non-compliant materials and components from existing products wherever
these may occur. Presently, none of the non-compliant materials are known to occur in Michell
Instruments’ products.
The new Directive 2011/65/EU (RoHS2) entered into force on 21 July 2011 and required all Member
States to transpose the provisions into their respective national laws by 2 January 2013.
MDM50 LP Version User’s Manual
Under the provisions of the RoHS2 EU Directive 2011/65/EU (Article 3, [24]) defi nes ‘Control and
Monitoring Equipment’ specifi cally as ‘monitoring and control instruments designed exclusively for
industrial or professional use’.
RoHS2 EU Directive 2011/65/EU states the closing date for compliance of any Control and Monitoring
Equipment product sold into the EU market place as 22nd July 2017.
However, the careful design policy of all Michell Instruments’ products continues to attain compliance
in the shortest practical timescales and strives to ensure that less than 0.1% of total mass per
product, of all non-compliant materials, appear within them. Michell Instruments continues to
monitor suppliers and material sources to ensure that compliance of goods provided is maintained.
January 2013
C.5 Warranty
Unless otherwise agreed, the Supplier warrants that, as from the date of delivery for a period of 12
months, the goods and all their component parts, where applicable, are free from any defects in
design, workmanship, construction or materials.
The Supplier warrants that the services undertaken shall be performed using reasonable skill and
care, and be of a quality conforming to generally accepted industry standards and practices.
Except as expressly stated, all warranties whether express or implied, by operation of law or
otherwise, are hereby excluded in relation to the goods and services to be provided by the Supplier.
All warranty services are provided on a return to base basis. Any transportation costs for the return
of a warranty claim shall reside with the Customer.
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C.6 REACH Compliance
Regulation (EC) No. 1907/2006
Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH)
Michell Instruments is a manufacturer of moisture measurement and gas analysis instrumentation
and is a ‘downstream’ user of chemicals, as described by the EU Council Directive 76/769/EEC. The
products we supply are not raw chemical products (goods).
Under normal and reasonably foreseeable circumstances of application, the goods supplied to you
shall not contain or release any prohibited chemicals. No listed SVHC (Substances of Very High
Concern) appear within products manufactured by Michell Instruments. Therefore the 0.1% mass
per product, or total usage of 1 tonne/year, will never be exceeded. For these reasons we are neither
required by obligation for registration nor for the creation of material safety data sheets (MSDS) for
our products.
APPENDIX C
Our continued review of the SVHC Candidate List and
compliant.
Michell Instruments maintains a hazardous material register in which MSDS data sheets are collated,
and we will check that our suppliers will comply to REACH requirements for all materials and
substances we use in the processes of our manufacturing.
In the unlikely event that any chemicals of concern appear in our products in quantities greater than
0.1% of total mass per product we will immediately inform you by correspondence according to the
REACH Article 33 requirements. Our current appraisal is, however, that we do not expect or foresee
such an incidence.
January 2013
C.7 Return Policy
If a Michell Instruments’ product malfunctions within the warranty period, the following procedure
must be completed:
1. Notify a Michell Instruments’ distributor, giving full details of the problem, the
model variant and the serial number of the product.
latest additions is to ensure we remain
2. If the nature of the problem indicates the need for factory service then the
instrument should be returned to Michell Instruments, carriage prepaid, preferably
in the original packaging, with a full description of the fault and the customer
contact information.
3. Upon receipt, Michell Instruments will evaluate the product to determine the cause
of the malfunction. Then, one of the following courses of action will be taken:
• If the fault is covered under the terms of the warranty, the
instrument will be repaired at no cost to the owner and returned.
• If Michell Instruments determines that the fault is not covered
under the terms of the warranty, or if the warranty has expired,
an estimate for the cost of the repairs, at standard rates, will be
provided. Upon receipt of the owner’s approval to proceed, the
product will be repaired and returned.
Michell Instruments 23
APPENDIX C
C.8 Calibration Facilities
Michell Instruments’ calibration facilities are among the most sophisticated in the world and have
been recognized for their excellence.
Traceability to the National Physical Laboratory (NPL) UK is achieved through our UKAS Accreditation
(Number 0179). This covers dew point over the range -90 to +90°C (-130 to +194°F) and also
Relative Humidity.
Dew-point calibrations are also traceable to the National Institute for Standards & Technology (NIST)
USA over the range -75 to +20°C (-103 to +68°F).
NOTE: Standard traceable calibration certifi cates for instruments and sensors are not
issued under our UKAS accreditation.
C.9 Manufacturing Quality
Michell Instruments is registered with the British Standards Institute for Quality Assurance to:
MDM50 LP Version User’s Manual
BS EN ISO 9001: 2008
Rigorous procedures are performed at every stage of production to ensure that the materials of
construction, manufacturing, calibration and fi nal test procedures meet the requirements laid down
by our BSI approved Quality System.
Please contact Michell Instruments (www.michell.com) if the product does not arrive in perfect
working order.
C.10 FCC (EMC Requirements for North America)
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference, including interference that may cause
undesired operation.
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the user manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own expense. This product must be
operated as per the operating instructions provided. Do not make any alterations or modifi cations
to the product. Any unauthorized alterations or modifi cations made to this product may require you
to stop operating the product.
Canadian Radio Interference Regulations.
This Class A digital product complies with Canadian ICES-001. Règlement canadien sur les
interférences radio. Ce produit numérique de classe A est conforme à la norme NMB-001.
24 97475 Issue 1.3, March 2016
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APPENDIX D
Appendix D
Decontamination Declaration
Michell Instruments 25
APPENDIX D
MDM50 LP Version User’s Manual
Appendix D Decontamination Declaration
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IMPORTANT NOTE: Please complete this form prior to this instrument, or any components, leaving your
site and being returned to us, or, where applicable, prior to any work being carried out by a Michell
engineer at your site.
Instrument Serial Number
Warranty Repair? YES NO Original PO #
Company Name Contact Name
Address
Telephone # E-mail address
Reason for Return /Description of Fault:
Has this equipment been exposed (internally or externally) to any of the following?
Please circle (YES/NO) as applicable and provide details below
Biohazards YES NO
Biological agents YES NO
Hazardous chemicals YES NO
Radioactive substances YES NO
Other hazards YES NO
Please provide details of any hazardous materials used with this equipment as indicated above (use continuation sheet
if necessary)
Your method of cleaning/decontamination
Has the equipment been cleaned and decontaminated? YES NOT NECESSARY
Michell Instruments will not accept instruments that have been exposed to toxins, radio-activity or bio-hazardous
PDWHULDOV)RUPRVWDSSOLFDWLRQVLQYROYLQJVROYHQWV DFLGLFEDVLF ÀDPPDEOHRUWR[LFJDVHVDVLPSOHSXUJHZLWKGU\
JDVGHZSRLQW&RYHUKRXUVVKRXOGEHVXI¿FLHQWWRGHFRQWDPLQDWHWKHXQLWSULRUWRUHWXUQ
Work will not be carried out on any unit that does not have a completed decontamination declaration.
Decontamination Declaration
I declare that the information above is true and complete to the best of my knowledge, and it is safe for Michell
personnel to service or repair the returned instrument.
Name (Print) Position
Signature Date
F0121, Issue 2, December 2011
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NOTES:
Michell Instruments 27
http://www.michell.com
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