ION MVI User manual

Pioneering Gas Sensing Technology. ionscience.com
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MVI
Instrument User Manual V2.4

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Thank you for purchasing your Ion Science instrument.
The standard warranty of your instrument can be extended to up to five
years on PhoCheck Tiger and two years on other Ion Science instruments.
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Declaration of Conformity
The EU Authorised Representative of the manufacturer Ion Science limited has sole responsibility, on the date this product
accompanied by this declaration is placed on the market, the product conforms to all technical and regulatory requirements of the
listed directives
Authorised Representative: ISM Deutschland GmbH · Laubach 30 · D-40822 Mettmann, Germany
Product: MVI Mercury Vapour Indicator
Product Description: Handheld detector comprising dual beam UV absorption module for the detection of Mercury
vapour
Directives: EMC Directive (2014/30/EU)
LVD Directive (2014/35/EU)
Standards:
EN IEC 61010-1:2010 Safety requirements for electrical equipment for measurement, Control and laboratory use –
Part 1: General requirements
EN ISO/IEC 9001:2015 Quality management systems –Requirements
EN 61326-1:2013 Electrical Equipment for measurement, control and laboratory use EMC Requirements (Class
B and General Immunity)
Name: Clemens A. Verley Position: Chief Executive Officer
Signature: Date: 31st December 2020

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Contents
Declaration of conformity ...................................................................................................................... 3
Statements ............................................................................................................................................ 5
Responsibility for Use ..................................................................................................................................... 5
Warnings......................................................................................................................................................... 5
Quality Assurance ........................................................................................................................................... 5
Disposal........................................................................................................................................................... 5
Calibration and Repair Facility........................................................................................................................ 5
Training ........................................................................................................................................................... 5
Legal Notice .................................................................................................................................................... 6
Warranty......................................................................................................................................................... 6
Contact Ion Science Limited ......................................................................................................................... 19
Introduction........................................................................................................................................... 6
Principle of Operation..................................................................................................................................... 6
Specification ....................................................................................................................................................... 7
Packing list.......................................................................................................................................................... 8
Description ......................................................................................................................................................... 9
Operating controls ........................................................................................................................................... 10
Battery charging ............................................................................................................................................... 12
Recharging .................................................................................................................................................... 12
Preparing the MVI for use .................................................................................................................... 13
Interferences ....................................................................................................................................... 15
User maintenance................................................................................................................................ 16
Filter Replacement........................................................................................................................................ 16
Alarm Level ................................................................................................................................................... 16
MVI Health Check ......................................................................................................................................... 16
Consumable items................................................................................................................................ 17
Calibration and repair .......................................................................................................................... 17
Manual log........................................................................................................................................... 18

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Statements
Responsibility for Use
Inadequate performance of the gas detection equipment described in this manual may not necessarily be self-evident
and consequently equipment must be regularly inspected and maintained. Ion Science recommends that personnel
responsible for equipment use institute a regime of regular checks to ensure it performs within calibration limits, and
that a record be maintained which logs calibration check data. The equipment should be used in accordance with this
manual, and in compliance with local safety standards.
Warnings
Mercury amalgamates with gold, silver, stainless steel, aluminium and copper alloys. Accidental trapping of mercury
can cause serious damage to vital parts of electronic equipment and delicate instruments. mercury is also toxic if
inhaled, ingested or absorbed through the skin or eyes. Care must always be exercised when handling mercury.
The MVI employs an internal Ultra-Violet light source operating in the 254 nm region. Ultra-Violet radiation is
dangerous and if for any reason the lamp is operated whilst exposed, UV protective glasses must be worn.
High voltages are used in this instrument and the cover should only be removed by qualified technicians.
Ion Science Limited can accept no responsibility for the incorrect use of the instrument that cause harm or damage to
persons or property. It is the user’s responsibility to appropriately respond to the readings given.
Quality Assurance
MVI instruments are manufactured by Ion Science Limited within an ISO 9001:2015 compliant quality system,
which ensures that the equipment supplied to our customers has been designed and assembled reproducibly,
and from traceable components.
Disposal
Please dispose of the MVI, its components and any used batteries in accordance with all local and national safety and
environmental requirements. This includes the European WEEE (Waste Electrical and Electronic Equipment) Directive.
Ion Science Limited offers a take back service. Please contact us for more information.
Calibration and Repair Facility
Ion Science Limited offer a repair and calibration service. Please contact us for more information:
[email protected]
Training
Ion Science would be happy to provide training in the operation and maintenance of the MVI. Please contact us
should this be of interest.

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Legal Notice
Whilst every attempt is made to ensure the accuracy of the information contained in this manual, Ion Science accepts
no liability for errors or omissions, or any consequences deriving from the use of information contained herein. It is
provided "as is" and without any representation, term, condition or warranty of any kind, either express or implied. To
the extent permitted by law, Ion Science shall not be liable to any person or entity for any loss or damage which may
arise from the use of this manual. We reserve the right at any time and without any notice to remove, amend or vary
any of the content which appears herein.
Warranty
Standard Warranty can be extended to up to 2 years on the MVI when registering your instrument via
our website: www.ionscience.com
To receive your Extended Warranty, you need to register within one month of purchase (Terms and
Conditions apply). You will then receive a confirmation email that your Extended Warranty Period has
been activated and processed.
Full details, along with a copy of our Warranty Statement can be found by visiting: www.ionscience.com
Introduction
The Mercury Vapour Indicator (MVI) is primarily used to monitor environments where mercury or any of the mercury
compounds are produced, processed or stored and applications where mercury vapours may pose a health hazard to
personnel.
Units of measurement used for detecting mercury vapour are micrograms/cubic metre expressed as µg/m3.
The MVI has two manually switched ranges of measurement:
0-199 µg/m3with a resolution of 0.1 µg/m3
0-1999 µg/m3with a resolution of 1 µg/m3
Principle of Operation
A sample of the immediate atmosphere under investigation is drawn by the pump into a glass sampling cell where an
Ultra-Violet light source is absorbed by the sample. Photodiode detectors are used to measure the intensity of
radiation passing through the sample chamber. The optical system is designed specifically to detect mercury in the
Ultra-Violet region of 254 nm.
The presence of mercury vapour will reduce the radiation energy reaching the photodiode detector in proportion to
the vapour concentration. This change is then converted into an electrical signal and conditioned to provide a linear
reading on the front LCD as µg/m3.
An audible alarm is fitted which gives warnings when pre-set conditions are achieved.

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Specification
Function Surveying atmospheres for mercury (Hg) concentrations below and above
the accepted exposure limit
Detector Dual beam Ultra-Violet absorption module
Measuring Ranges 0.1-199.9 and 1.0-1999 µg/m3(user controlled)
Sensitivity 0.1 µg/m3and 1 µg/m3
Accuracy ± 5 micrograms or ± 10% of reading
Repeatability ± 5% FSD
Response Time Approximately 3 seconds
Temperature Range +10°C to +50°C
0 to 100% RH (non-condensing)
Battery Type 15 Volt NiMH rechargeable
Battery Life Greater than >4.5 hours after full charge
Dimensions 145 x 295 x 80 mm (120 mm with handle)
Weight 5 lb 3 oz (2.35 kg)
Linearity Within 5% from 0 to 500 µg/m3
Zero Drift Less than 5 µg/hour
Alarms Audible alarm factory preset to 20 µg/m3
Datalogger 0-2 volt for use with a datalogger (not supplied)
Operation After a short warm up the MVI gives real time indication of Mercury vapour
levels through the PTFE probe

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Packing list
The MVI is sent to you packaged in a lightweight, waterproof structural resin instrument case with foam insert.
Contents should be carefully removed and checked against the packing list. Any discrepancies between the contents
and packing list must be reported to Ion Science Limited within 10 days of receipt of shipment. Ion Science cannot be
held responsible for shortages not reported within that period.
Item Description Quantity
1 MVI instrument 1
2 MVI battery charger 1
3 Charcoal in line filter 1
4 PTFE probe and filter assembly 1
(including 10 water trap filters)
5 MVI Calibration Certificate & Checklist 1
6 Premium case with foam inserts 1
1
3
2
6
5
4

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Description
The Mercury Vapour Indicator (MVI) is a compact, self contained and completely portable instrument which indicates
the amounts of Mercury in micrograms/cubic metre.
The indicating digital display and carrying handle are mounted on the top cover. A female Luer connector is provided
at the end of the instrument to accommodate a dust and water trap filter with PTFE extension probe. In addition, a
length of flexible tubing may be connected to the filter for greater convenience when checking floor areas or gratings.
The internal Nickel Metal Hydride battery is rechargeable using a plug-in battery charger. The operating time when
fully charged is greater than >4.5 hours. Warm up time is approximately 10 minutes and direct readings are indicated
on an easy to read LCD display.
The audible alarm provides warning of three pre-defined conditions:
Condition Audible Signal
1. Mercury vapour concentration greater than 20 µg/m3Slow pulse (1/sec)
2. Negative reading from -20 to -25 µg/m3 and lower Continuous tone
3. Low battery Fast pulse (3/sec)
The audible alarm is inhibited during the first 5 minutes of operation.

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Operating controls
The MVI indicating display and all operating controls are mounted on the front panel where they are readily accessible
when the unit is held in the operating position.
1. The ON/OFF switch is located immediately below the display and to the left. In the ON position the MVI will
operate and display. In the OFF position, battery power to the MVI is disconnected. The instrument MUST also
be switched OFF to enable charging.
2. The Zero Adjust control is located at centre of the panel between the handle and display. A ten turn
potentiometer is used to manually set the display to zero, provided that the instrument is in a mercury free
atmosphere. The MVI is designed to show both positive and negative readings and can be adjusted between ±
240 µg/m3 by use of the zero control. Zero drift shown on the display is normal and is caused by changes in
temperature or humidity. The zero control is used to cancel out any negative or positive change on the display
prior to taking a reading.
3. Range Switch
a) 2000 in this range the instrument will measure over a range of 0-1999 µg/m3in steps of 1 µg/m3.
b) 200 in this range the instrument will measure over a range of 0-199 µg/m3 in steps of 0.1 µg/m3.
ON/OFF Switch
Range Switch
Zero Adjust