Michell Instruments Easidew Portable Operating Manual

Easidew Portable
Standard Version
User’s Manual
97065 Issue 16.3
October 2019
Please ll out the form(s) below for each instrument that has been purchased.
Use this information when contacting Michell Instruments for service purposes.
Analyzer
Serial Number
Invoice Date
Location of Instrument
Tag Number
Analyzer
Serial Number
Invoice Date
Location of Instrument
Tag Number
Analyzer
Serial Number
Invoice Date
Location of Instrument
Tag Number
Easidew Portable
For Michell Instruments' contact information please go to
www.michell.com
© 2019 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.
Easidew Portable 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 ................................................................................................11
5.1 Calibration ....................................................................................................... 11
5.2 Sensor / Battery Replacement ........................................................................... 11
5.3 Filter Cartridge Replacement ............................................................................. 13
5.4 Checking the Easidew Portable Electronics Calibration ......................................... 13
5.5 List of Spares ................................................................................................... 13
5.6 Troubleshooting ................................................................................................ 14
Figures
Figure 1 Interchangeable Gas Inlet/Outlet Fittings .....................................................4
Figure 2 User Controls .............................................................................................6
Figure 3 Jack Plug Wiring .........................................................................................7
Figure 4 Material Permeability Comparison ................................................................8
Figure 5 2-Wire Connection - View Showing Rear of Connector Terminal Block ........... 13
Appendices
Appendix A Technical Specications .............................................................................. 16
Appendix B Quality, Recycling & Warranty Information ................................................... 18
Appendix C Decontamination Declaration ......................................................................20
iv 97065 Issue 16.3, October 2019
Easidew Portable 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 quali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 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 specied safe working pressure is 20 barg (290 psig). Refer to the Technical Speci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 oces contact information.
Calibration
The recommended calibration interval for the Easidew Portable is one year, unless otherwise speci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 speci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
Easidew Portable 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 97065 Issue 16.3, October 2019
Easidew Portable User’s Manual
1 INTRODUCTION
The Easidew Portable comprises an Easidew sensor tted into a sample block with an integrated lter cartridge, and Legris push 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 Easidew Portable 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 Easidew Portable 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 o. The charger is suitable to connect power to the instrument indenitely, but it is recommended to allow the battery pack to go through a full charge-discharge cycle at least once per month.
All Michell Ceramic Moisture Sensors are subject to a 13-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 eld. Each Easidew Portable is supplied with a calibration certi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:
Easidew Portable
2m of 6mm O/D PTFE tube
Battery charger
Mains lead
3 pole ¼” jack plug (inside lid) - for analog output connections
Certicate of calibration
Before using the Easidew for the rst time it is recommended that the battery pack is charged for a minimum of 12 hours.
Easidew Portable User’s Manual
2 97065 Issue 16.3, October 2019
Easidew Portable User’s Manual
3 OPERATION
Maximum operating pressure is 20 barg (290 psig).
It is important that the gas ttings are correctly tightened, and
!
3.1 General Operation
To operate the Easidew Portable, follow these instructions:
any tubing is secure in the push ttings before use.
Failure to do so will aect the instrument's pressure rating.
OPERATION
1. Ensure that all gas ttings are fully tightened before use.
2. Gas under test should be restricted to 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 Gas In port.
4. Connect the sample gas vent line to the instrument Gas Out port.
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 ow until the display shows a stable reading. Typically this would be around 15 to 30 minutes for spot checks at dew points of
-40°C (-40°F) and above.
7. Switch the unit o and disconnect the sample lines.
NOTE: Filters are essential for potentially dirty/contaminated gases – the
tted lter should be checked before and after use and replaced regularly - as
required.
Michell Instruments 3
OPERATION
Easidew Portable User’s Manual
3.2 Atmospheric or Line Pressure Measurements
The Easidew Portable is supplied with two labelled, interchangeable, gas inlet/outlet ttings.
Number Description
1 4mm free ow tting 2 0.4mm restricted 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 tting should be on the gas outlet port.
To perform measurements at atmospheric pressure, the restricted tting should be on the gas inlet port.
The Gas In port is ALWAYS on the right hand side.
!
4 97065 Issue 16.3, October 2019
Easidew Portable User’s Manual
3.3 Measuring Dew Points Below -40°C (-40°F)
Due to the signicantly lower levels of moisture present at dew points of this level, the response times of the sensor will be signicantly increased. The table below oers 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 15
-40 -40 30
-50 -58 60
-60 -76 180
The Easidew sensor tted to the Easidew Portable is designed and calibrated to measure dew points as low as -100°C (-148°F). However, due to the large internal volume of the sample block, the hygroscopic nature of the built-in lter, and the potential of the gas ttings to trap moisture at very low dew points, we recommend that the Easidew Portable is not used to measure dew points below -60°C (-76°F). Suitable alternative solutions in our range would be the Easidew Online, Pura xed installations, MDM300 Portable, or our cooled mirror range of instruments.
T100 Response Time
(mins)
Michell Instruments 5
OPERATION
3.4 User Controls
Easidew Portable User’s Manual
2
1
EASIDEW Portable Hygrometer
Power Fuse
°Cdp
4-20
Gas In
To measure
line pressure
atmospheric pressure
Gas Out
at
2 1
21
Gas Out
3 4
o
-
mA
O/P
Battery Charger
Filter Fitted
5
6
Gas In
7
Figure 2
User Controls
Indicates the measured dew point in °C from -100 to +20 (-148 to +68°F). Under certain conditions the following error messages may be
1 Digital Display
displayed:
ErrL = Sensor under range ErrH = Sensor over range Err I = Sensor fault or sensor disconnected
2 Power Switch Switches the Easidew Portable 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. See Section 5.5 for troubleshooting information.
The battery pack will charge if the instrument is switched ON or OFF.
The Easidew portable features an analog output socket that provides a linear 4-20 mA current loop, scaled to -100 to +20°C (-148 to +68°F)dew point. This allowed the instrument to be connected to a chart recorder, data logger or PC to enable dew­point trends to be analyzed over time. For wiring information see Section 3.5.
The Easidew Portable can be used for measurements at line pressure (up to 20 barg (290 psig)) or atmospheric pressure. Legris push ttings are supplied for use with 6mm OD PTFE tubing. There is a 32mm particulate lter (99.5% removal of 0.1
micron particles) tted as standard under the Gas In port position.
6 97065 Issue 16.3, October 2019
Easidew Portable User’s Manual
3.5 4–20 mA Output Socket Wiring
The Easidew Portable provides a linear 4-20 mA output scaled from -100 to +20°C.
The socket accepts a 3 pole ¼” jack plug (supplied) and should be wired as shown below:
OPERATION
+VE
-VE
Figure 3
-VE
Jack Plug Wiring
+VE
Michell Instruments 7
GOOD MEASUREMENT PRACTICE
4 GOOD MEASUREMENT PRACTICE
Ensuring reliable and accurate moisture measurements requires the correct sampling techniques, and a basic understanding of how water vapor behaves. This section aims to explain the common mistakes and how to avoid them.
Sampling Materials – Permeation and Diusion
All materials are permeable to water vapor since water molecules are extremely small compared to the structure of solids, even including the crystalline structure of metals. The graph above demonstrates this eect by showing the increase in dew point temperature seen when passing very dry gas through tubing of dierent materials, where the exterior of the tubing is in the ambient environment.
- 20
- 30
Easidew Portable User’s Manual
- 40
- 50
Dew point (ºC)
- 60
- 70
Figure 4
nickel
stainless steel
1 2 3 4 5
Time (hours)
Material Permeability Comparison
nylon
copper
polyethylene
PTFE
What this demonstrates is the dramatic eect that dierent tubing materials have on the humidity levels of a gas passed through them. Many materials contain moisture as part of their structure and when these are used as tubing for a dry gas the gas will absorb some of the moisture. Always avoid using organic materials (e.g. rubber), materials containing salts and anything which has small pores which can easily trap moisture (e.g. nylon).
As well as trapping moisture, porous sampling materials will also allow moisture vapor to ingress into the sample line from outside. This eect is called diusion and occurs when the partial water vapor pressure exerted on the outside of a sample tube is higher than on the inside. Remember that water molecules are very small so in this case the term ‘porous’ applies to materials that would be considered impermeable in an everyday sense – such as polyethylene or PTFE. Stainless steel and other metals can be considered as practically impermeable and it is surface nish of pipework that becomes the dominant factor. Electropolished stainless steel gives the best results over the shortest time period.
Take into consideration the gas you are measuring, and then choose materials appropriate to the results you need. The eects of diusion or moisture trapped in materials are more signicant when measuring very dry gases than when measuring a sample with a high level of humidity.
8 97065 Issue 16.3, October 2019
Easidew Portable User’s Manual
Temperature and Pressure eects
As the temperature or pressure of the environment uctuates, water molecules are adsorbed and desorbed from the internal surfaces of the sample tubing, causing small uctuations in the measured dew point.
GOOD MEASUREMENT PRACTICE
Adsorption
solid to the surface of a material, creating a lm. The rate of adsorption is increased at higher pressures and lower temperatures.
Desorption
constant environmental conditions, an adsorbed substance will remain on a surface almost indenitely. However, as the temperature rises, so does the likelihood of desorption occurring.
Ensuring the temperature of the sampling components is kept at consistent levels is important to prevent temperature uctuation (i.e. through diurnal changes) continually varying the rates of adsorption and desorption. This eect will manifest through a measured value which increases during the day (as desorption peaks), then decreasing at night as more moisture is adsorbed into the sampling equipment.
is the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved
is the release of a substance from or through the surface of a material. In
If temperatures drop below the sample dew point, water may condense in sample
tubing and aect the accuracy of measurements.
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 reduces the water vapor content of the gas being measured. Condensed liquid can also alter the humidity elsewhere by dripping or running to other locations where it may re-evaporate.
Although ambient pressure does not change drastically in a single location, the gas sample pressure does need to be kept constant to avoid inconsistencies introduced by adsorption or desorption. 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; however, vortices at the leak point and a negative vapor pressure dierential will also allow water vapor to contaminate the ow.
Theoretically ow rate has no direct eect on the measured moisture content, but in practice it can have unanticipated eects on response speed and accuracy. An inadequate ow rate may:
Michell Instruments 9
GOOD MEASUREMENT PRACTICE
Accentuate adsorption and desorption eects 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 ow.
Increase the chance of contamination from back diusion. Ambient air that is wetter than the sample can ow from the exhaust back into the system. A longer exhaust tube can help alleviate this problem.
Slow the response of the sensor to changes in moisture content.
An excessively high ow rate can:
Introduce back pressure, causing slower response times and unpredictable changes in dew point
Result in a reduction in depression capabilities in chilled mirror instruments by having a cooling eect on the mirror. This is most apparent with gases that have a high thermal conductivity such as hydrogen and helium.
Easidew Portable User’s Manual
System design for fastest response times
The more complicated the sample system, the more areas there are for trapped moisture to hide. The key pitfalls to look out for here are the length of the sample tubing and dead volumes.
The sample point should always be as close as possible to the critical measurement point to obtain a truly representative measurement. The length of the sample line to the sensor or 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 eects of adsorption and desorption will become more apparent.
Dead volumes (areas which are not in a direct 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 lters, valves (e.g. rubber from pressure regulators) or any other parts of the system can also trap moisture.
Plan your sampling system to ensure that the sample tap point and the measurement point are as close as possible to avoid long runs of tubing and dead volumes.
Filtration
All trace moisture measurement instruments and sensors are by their nature sensitive devices. Many processes contain dust, dirt or liquid droplets. Particulate 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 or membrane lter should be used. The membrane provides protection from liquid droplets and can even stop ow to the analyser completely when a large slug of liquid is encountered, saving the sensor from potentially irreparable damage.
10 97065 Issue 16.3, October 2019
Easidew Portable User’s Manual
5 MAINTENANCE
Routine maintenance of the Easidew Portable is conned to regular re-calibration of the internal, removable Easidew sensor and replacement of the lter cartridge.
5.1 Calibration
The calibration of the internal sensor 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 sensor is returned to the manufacturer, Michell Instruments, or an approved agent. A calibration certicate bearing a seven-point calibration is issued with each sensor.
In most applications, annual re-calibration ensures that the stated accuracy of the Easidew sensor is maintained.
or US
National Institute of Standards and Technology
MAINTENANCE
United Kingdom Accreditation
(NIST) standards
5.2 Sensor / Battery Replacement
To remove the sensor, or battery pack:
1. Ensure instrument is switched o 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 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 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 sensor connecting plug and pull o the connector.
6. Unscrew the sensor from the block.
Fitting the replacement is simply a reversal of the above procedure. When tting a new sensor it may be necessary to change the alignment of the GDSN connector (see next page).
Michell Instruments 11
MAINTENANCE
If the front panel prevents the connector from tting onto the sensor, 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).
Easidew Portable User’s Manual
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.
12 97065 Issue 16.3, October 2019
Easidew Portable User’s Manual
Replace the locking screw and cable gland.
5.3 Filter Cartridge Replacement
Unscrew the gas inlet tting to reveal the lter, which can then simply be removed for checking or replacement.
MAINTENANCE
5.4 Checking the Easidew Portable Electronics Calibration
Supply
4-20 mA
PIN 1
PIN 3
Figure 5
To verify the display electronics are within calibration a 4-20mA current source can be connected in place of the sensor.
At 4 mA the display should show -100.0°Cdp ±0.5°C (-148°Fdp ±0.9°F)
At 20 mA the display should show +20.0°Cdp ±0.5°C ( +68°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
(GND)
Screen/Shield
Optional
5.5 List of Spares
P/N Description
SSF-PF-10PK Pack of 10 particulate lter cartridges EAP-BAT Replacement battery pack EAP-CHR Replacement battery charger
Michell Instruments 13
MAINTENANCE
5.6 Troubleshooting
Symptom Cause Actions
Display shows “ErrI
Display shows “ErrL
Easidew Portable User’s Manual
Sensor disconnected or sensor tile / sensor thermistor fault.
NOTE: This error is normally displayed
during the rst few
seconds while the instrument is starting up.
Sensor reading under­range.
Check sensor cable is securely connected inside instrument.
Check instrument electronics with 4-20mA source.
Exchange sensor.
Check instrument electronics with 4-20mA source.
Display shows “ErrH
Display ickers on and o.
Sensor current signal < 4mA
Sensor tile open circuit. Sensor reading over-
range.
Sensor current signal > 20mA
Sensor tile short circuit.
Battery voltage low. Connect charger.
Exchange sensor.
Sensor may have been exposed to saturation conditions or liquid contamination. Check that 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) / 1ppmV moisture) air for 12 to 24 hours.
Exposure to other contaminants can cause lasting damage and may require sensor to be exchanged.
Check instrument electronics with 4-20mA source.
14 97065 Issue 16.3, October 2019
Easidew Portable User’s Manual
APPENDIX A
Appendix A
Technical Specications
Michell Instruments 15
APPENDIX A
Easidew Portable User’s Manual
Appendix A Technical Specications
Performance
Measurement Technology Impedance Measurement Ranges
Spot Checks Online
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)
-40 to +20°Cdp (-40 to +68°Fdp)
-100 to -40°Cdp (-148 to -40°Fdp)
Electrical Input/Output
Output
Power Supply Rechargeable NiMH battery pack, charger included
4-20 mA current maximum load resistance 400 Ω
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))
Mechanical Specications
Display Flush mounted 3.5 digit red LED
Case
Weight 4kg (8.8lbs) total weight Enclosure Rating
Case Closed Sample Connections Push t penumatic ttings for gas inlet/outlet
Sample Block
Filter Cartridge
Interchangeability Sensor is fully interchangeable with other Easidew products 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)
16 97065 Issue 16.3, October 2019
Easidew Portable User’s Manual
APPENDIX B
Appendix B
Quality, Recycling
& Warranty
Information
Michell Instruments 17
APPENDIX B
Easidew Portable User’s Manual
Appendix B Quality, Recycling & Warranty Information
Michell Instruments is dedicated to complying to all relevant legislation and directives. Full information can be found on our website at:
www.michell.com/compliance
This page contains information on the following directives:
ATEX Directive
Calibration Facilities
Conict Minerals
FCC Statement
Manufacturing Quality
Modern Slavery Statement
Pressure Equipment Directive
REACH
RoHS3
WEEE2
Recycling Policy
Warranty and Returns
18 97065 Issue 16.3, October 2019
Easidew Portable User’s Manual
APPENDIX C
Appendix C
Decontamination Declaration
Michell Instruments 19
APPENDIX C
Easidew Portable User’s Manual
Appendix C Decontamination Declaration
Decontamination Certicate
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
materials. For most applications involving solvents, acidic, basic, ammable or toxic gases a simple purge with dry gas (dew point <-30°C) over 24 hours should be sufcient to decontaminate the unit prior to return.
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
20 97065 Issue 16.3, October 2019
Easidew Portable User’s Manual
NOTES:
Michell Instruments 21
http://www.michell.com
Loading...