Ossila L2002A2 User manual

enabling materials science Ossila.com
UV Ozone Cleaner
User Manual
Manual version 2.0.G
Product code: L2002A2
Product Version: 2.0
Software Version: 2.0

UV Ozone Cleaner User Manual
Ossila.com 2 Ossila Limited © 2023
Contents
Contents................................................................................................................................................................. 2
1. Overview........................................................................................................................................................3
1.1 Applications.................................................................................................................................................................... 3
1.2 Contaminants................................................................................................................................................................. 3
2. EU Declaration of Conformity (DoC).............................................................................................................4
3. Safety.............................................................................................................................................................7
3.1 Warning .......................................................................................................................................................................... 7
3.2 Use of Equipment.......................................................................................................................................................... 7
3.3 Hazard Icons .................................................................................................................................................................. 7
3.4 General Hazards ............................................................................................................................................................ 8
3.5 Power Cord Safety......................................................................................................................................................... 9
3.6 Servicing ......................................................................................................................................................................... 9
3.7 Health and Safety –Installation ................................................................................................................................... 9
3.8 Health and Safety –Operation..................................................................................................................................... 9
3.9 Health and Safety –Servicing ..................................................................................................................................... 10
4. Unpacking....................................................................................................................................................10
4.1 Packing List................................................................................................................................................................... 10
4.2 Damage Inspection...................................................................................................................................................... 11
5. Specifications ..............................................................................................................................................11
6. System Components...................................................................................................................................12
7. Installation...................................................................................................................................................13
8. Operating the UV Ozone Cleaner...............................................................................................................14
8.1 UV Ozone Cleaner Overview ...................................................................................................................................... 14
8.2 UV Ozone Cleaner User Interface .............................................................................................................................. 16
8.3 Practical Operation...................................................................................................................................................... 17
8.4 Program Operation ..................................................................................................................................................... 17
8.5 Operational Safety....................................................................................................................................................... 21
9. Maintenance................................................................................................................................................23
9.1 Cleaning........................................................................................................................................................................ 23
9.2 Repair & Service........................................................................................................................................................... 23
9.3 Storage Conditions...................................................................................................................................................... 23
10. UV Ozone Cleaner Troubleshooting...........................................................................................................24
11. List of Related Products..............................................................................................................................25
12. Revision History...........................................................................................................................................26

UV Ozone Cleaner User Manual
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1. Overview
Our UV Ozone Cleaning System provides a simple, inexpensive, and efficient method of obtaining
ultra-clean surfaces free of organic contaminants. The UV Ozone Cleaning System can clean a wide
range of substrates, such as quartz, silicon, gold, nickel, aluminium, gallium arsenide, alumina, and
glass slides.
The cleaning procedure is based on a photo-sensitized oxidation process, where the contaminant
organic molecules are excited and/or dissociated by the absorption of short wavelength UV
radiation. The unit operates using a high-output ultraviolet (UV) light emitted from a mercury tube
grid lamp, which excites organic molecules and produces highly-reactive ozone gas from oxygen
that is present from the air within the cleaning chamber. Atomic oxygen is simultaneously
generated when molecular oxygen and ozone are dissociated by 185 nm and 254 nm wavelengths
respectively. The 254 nm radiation is absorbed by most hydrocarbons, as well as ozone. The
excited contaminant molecules react with atomic oxygen to form simpler, volatile molecules that
desorb from the surface. When both UV wavelengths are present, atomic oxygen is continuously
generated, and ozone is continually formed and destroyed.
The UV/ozone cleaning process can produce an atomically-clean surface in only a few minutes.
However, the substrate surface must be nominally clean beforehand. The cleaning rate of
UV/ozone using atmospheric oxygen at ambient conditions depends on the nature of the
contaminant molecules, but is typically of the order of 0.1 - 1.0 Å/s. The exact exposure times and
methods required to remove various contaminants will vary and should be determined
empirically. Please refer to the operating instructions for guidelines and further information.
1.1 Applications
•Improving surface hydrophilicity
•Surface cleaning
•Preparation for thin-film deposition and surface treatment
•Ultraviolet curing
•Removal of surface monolayers
•Surface oxidation
1.2 Contaminants
•Photoresist
•Resins
•Cleaning solvent residues
•Plastic surface/silicon oil residues

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•Solder flux
2. EU Declaration of Conformity (DoC)
We
Company Name: Ossila Limited
Postal Address: Solpro Business Park, Windsor street.
Postcode: S4 7WB
City: Sheffield
Telephone number: [phone]
Email Address: [email protected]
declare that the DoC is issued under our sole responsibility and belongs to
the following product:
Product: UV Ozone Cleaner (L2002A2)
Serial number: L2002A2-xxxx
Object of declaration:
UV Ozone Cleaner (L2002A2)
The object of declaration described above is in conformity with the relevant
Union harmonisation legislation:
Low Voltage Directive 2014/35/EU
EMC Directive 2014/30/EU
RoHS Directive 2011/65/EU
The following harmonised standards and technical specifications have been
applied:
BS EN 61010-1:2010/A1:2019 Safety requirements for electrical equipment for measurement,
control, and laboratory use.
Signed:

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Name: Dr James Kingsley
Place: Sheffield
Date: 11/09/2020
Декларация за съответствие на ЕС
Производител: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Великобритания
Декларира с цялата си отговорност, че посоченото оборудване съответства на приложимото законодателство на ЕС за хармонизиране, посочено на предходната(-
ите) страница(-и) на настоящия документ.
[Čeština] Prohlášení o shodě EU
Výrobce: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Spojené Království
Prohlašujeme na vlastní odpovědnost, že uvedené zařízeni je v souladu s příslušnými harmonizačními předpisy EU uvedenými na předchozích stranách tohoto
dokumentu.
[Dansk] EU-overensstemme lseserklæring
Producent: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, UK
Erklærer herved, at vi alene er ansvarlige for, at det nævnte udstyr er i overensstemmelse med den relevante EU-harmoniseringslovgivning, der er anført på
den/de foregående side(r) i dette dokument.
[Deutsch] EU-Konformitätserklärung
Hersteller: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Vereinigtes Königreich
Wir erklären in alleiniger Verantwortung, dass das aufgeführte Gerät konform mit der relevanten EU-Harmonisierungsgesetzgebung auf den vorangegangenen Seiten
dieses Dokuments ist.
[Eesti keel] ELi vastavusavaldus
Tootja: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, UK
Kinnitame oma ainuvastutusel, et loetletud seadmed on kooskõlas antud dokumendi eelmisel lehelküljel / eelmistel lehekülgedel ära toodud asjaomaste ELi
ühtlustamise õigusaktidega.
[Ελληνικά] Δήλωση πιστότητας ΕΕ
Κατασκευαστής: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Ηνωμένο Βασίλειο
Δηλώνουμε υπεύθυνα όn ο αναφερόμενος εξοπλισμός συμμορφώνεται με τη σχεnκή νομοθεσία εναρμόνισης της ΕΕ που υπάρχει σnς προηγούμενες σελίδες του
παρόντος εγγράφου.
[Español] Declaración de conformidad UE
Fabricante: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Reino Unido
Declaramos bajo nuestra única responsabilidad que el siguiente producto se ajusta a la pertinente legislación de armonización de la UE enumerada en las
páginas anteriores de este documento.
[Français] Déclaration de conformitéUE
Fabricant: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Royaume-Uni
Déclarons sous notre seule responsabilité que le matériel mentionné est conforme à la législation en vigueur de l'UE présentée sur la/les page(s) précédente(s)
de ce document.
[Hrvatski] E.U izjava o sukladnosti
Proizvođač: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Velika Britanija
Izjavljujemo na vlastitu odgovornost da je navedena oprema sukladna s mjerodavnim zakonodavstvom EU-a o usklađivanju koje je navedeno na prethodnoj(nim)
stranici(ama) ovoga dokumenta.
[Italiano] Dichiarazione diconformità UE
Produttore: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, UK
Si dichiara sotto la propria personale responsabilità che l'apparecchiatura in elenco è conforme alla normativa di armonizzazione UE rilevante indicata nelle pagine
precedenti del presente documento.
[Latviešu] ES atbilstības deklarācija
Ražotājs: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, UK
Ar pilnu atbilclību paziņojam, ka uzskaitītais aprīkojums atbilst attiecīgajiem ES saskaņošanas tiesību aktiem, kas minēti iepriekšējās šī dokumenta lapās.
[Lietuvių k.] ES atitikties deklaracija
Gamintojas: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, UK
atsakingai pareiškia, kad išvardinta įranga atitinka aktualius ES harmonizavimo teisės aktus, nurodytus ankstesniuose šio dokumento.

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[Magyar] EU-s megfelelőségi nyilatkozat
Gyártó: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, UK
Kizárólagos felelösségünk mellett kijelentjük, hogy a felsorolt eszköz megfelel az ezen dokumentum előző oldalán/oldalain található EU-s összehangolt jogszabályok
vonatkozó rendelkezéseinek.
[Nederlands] EU-Conformiteitsverklaring
Fabrikant: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, UK
Verklaart onder onze uitsluitende verantwoordelijkheid dat de vermelde apparatuur in overeenstemming is met de relevante harmonisatiewetgeving van de EU op
de vorige pagina('s) van ditdocument.
[Norsk] EU-samsvarserklæring
Produsent: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, UK
Erklærer under vårt eneansvar at utstyret oppført er i overholdelse med relevant EU-harmoniseringslavverk som står på de(n) forrige siden(e) i dette
dokumentet.
[Polski] Deklaracja zgodności Unii Europejskiej
Producent: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, UK
Oświadczamy na własną odpowiedzialność, że podane urządzenie jest zgodne ze stosownymi przepisami harmonizacyjnymi Unii Europejskiej, które
przedstawiono na poprzednich stronach niniejszego dokumentu.
[Português] Declaração de Conformidade UE
Fabricante: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Reino Unido
Declara sob sua exclusiva responsabilidade que o equipamento indicado está em conformidade com a legislação de harmonização relevante da UE mencionada na(s)
página(s) anterior(es) deste documento.
[Română] Declaraţie de conformitate UE
Producător: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Regatul Unit
Declară pe proprie răspundere că echipamentul prezentat este în conformitate cu prevederile legislaţiei UE de armonizare aplicabile prezentate la pagina/paginile
anterioare a/ale acestui document.
[Slovensky] Vyhlásenie o zhode preEÚ
Výrobca: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Spojené kráľovstvo
Na vlastnú zodpovednosť prehlasuje, že uvedené zariadenie je v súlade s príslušnými právnymi predpismi EÚ o harmonizácii uvedenými na predchádzajúcich stranách
tohtodokumentu.
[Slovenščina] Izjava EU o skladnosti
Proizvajalec: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, UK
s polno odgovornostjo izjavlja, da je navedena oprema skladna z veljavno uskladitveno zakonodajo EU, navedeno na prejšnji strani/prejšnjih straneh tega
dokumenta.
[Suomi] EU-vaatimustenmukaisuusvakuutus
Valmistaja: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, UK
Vakuutamme täten olevamme yksin vastuussa siitä, että tässä asiakirjassa luetellut laitteet ovat tämän asiakirjan sivuilla edellisillä sivuilla kuvattujen
olennaisten yhdenmukaistamista koskevien EU-säädösten vaatimusten mukaisia.
[Svenska] EU-försäkran omöverensstämmelse
Tillverkare: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Storbritannien
Vi intygar härmed att den utrustning som förtecknas överensstämmer med relevanta förordningar gällande EU-harmonisering som fmns på föregående sidor i detta
dokument.

UV Ozone Cleaner User Manual
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3. Safety
3.1 Warning
3.2 Use of Equipment
This UV Ozone Cleaner is designed to be used as instructed. It is intended to be operated in a
laboratory environment under a fume cupboard/hood. It was designed to be used in the following
environmental conditions:
•Indoors in a laboratory environment (pollution degree 2)
•Altitudes up to 2000 m
•Temperatures of 5°C to 40°C; maximum relative humidity of 80% up to 31°C.
The cleaner is supplied with a power cord (and if necessary an additional power transformer) for
the country of purchase, in accordance with European Commission regulations and British
Standards. Use of any other electrical power cables, adaptors, or transformers is not
recommended.
3.3 Hazard Icons
The following symbols can be found at points throughout the rest of the manual. Note and read
each warning before attempting any associated operations associated with it:
Warning
•Operate within a fume cupboard in a room with suitable air ventilation at all times
•Only use the power cord (and transformer) supplied with the unit
•Mains inlet rated for 230V ± 10%. For 110V mains supplies, use the transformer supplied
•Do not cover the ventilation slots
•If the lamp breaks, leave the room ventilating for at least 15 minutes & contact Ossila
•The unit must be connected to a grounded power outlet

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Table 1.1: Hazard warning labels used in this manual.
Symbol
Associated Hazard
General warning or caution, which accompanying text will explain
Electrical shock
Severe injury or death by electrical shock
UV radiation
Ozone inhalation
Explosion
3.4 General Hazards
Before installing or operating the UV Ozone Cleaner, there are several health and safety
precautions which must be followed and executed to ensure safe installation and operation.
WARNING: Improper handling when operating or servicing this equipment can result in serious
injury. Read this manual before operating or servicing this equipment.
I. DANGER: DO NOT use the UV Ozone Cleaner in the presence of an explosive
atmosphere.
II. WARNING: Emergency Power Disconnect options: Use the power cord as a
disconnect method, ensure that the power outlet for this cord is easily accessible
by the user.
III. CAUTION: The UV Ozone Cleaner uses a ground-type power plug, which must be
connected to a grounded outlet to prevent electrical shock. The UV Ozone Cleaning
unit will be supplied with an earthed plug appropriate for the country of purchase.
IV. The UV lamp is a mercury vapour lamp. The consumer may be exposed to mercury
only if the glass of the lamp is cracked /broken. If this happens, please abide by
the following rules to minimise exposure:
•Ensure the power is disconnected to avoid the risk of electrocution.
•Leave the room under ventilation for at least 15 minutes.
•Using cut-resistant gloves, collect any stray glass pieces in a sealed
container and close it tightly.

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•Store the container and UV Ozone Cleaner in a fume hood until they can
be taken to the next collection point for waste lamps.
3.5 Power Cord Safety
I. Emergency power disconnect options: Use the power cord as a disconnecting
method and remove it from the power source. To facilitate disconnect, make sure
the power outlet for this cord is readily accessible to the operator.
II. Only use the power cord (and transformer if using 110 V mains supply) supplied
with the UV Ozone Cleaner. Using an unearthed plug may result in serious injury
or death.
3.6 Servicing
If servicing is required, please return the unit to Ossila Ltd. The warranty will be invalidated if:
Modification or service has taken place by anyone other than an Ossila engineer.
The Unit has been subjected to chemical damage through improper use.
The Unit has been operated outside the usage parameters stated in the user documentation
associated with the Unit.
The Unit has been rendered inoperable through accident, misuse, contamination, improper
maintenance, modification or other external causes.
3.7 Health and Safety –Installation
I. High-intensity, mercury vapour lamps can generate extreme heat and
temperatures. Furthermore, ozone is a powerful oxidising agent and can react
explosively with combustible materials. Keep flammable materials a minimum of
three feet away from operating equipment.
II. The UV Ozone Cleaner is intended for operation inside a fully-functioning fume
hood or fume cupboard only. There is no ozone filtration system incorporated into
the UV Ozone Cleaner.
3.8 Health and Safety –Operation
I. UV radiation can cause severe burns to the eyes and skin. The UV Ozone Cleaner
prevents direct and reflected incident UV radiation through the positioning of the
lamp. Furthermore, an integrated safety interlock prevents the lamp from being

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powered on whilst the tray is open. As a precaution, never look directly into the
sample chamber when the UV ozone cleaner unit is powered on.
II. Ozone is a highly reactive substance. Any adverse health effects will be found at
the sites of initial contact: The respiratory tract, lungs - and at higher
concentrations, the eyes. The principal health effects are caused by irritation or
damage to the small airways of the lungs, and symptoms include coughing and a
feeling of tightness in the chest. Uncontrolled exposure to high levels of ozone
could lead to more severe health effects.
III. When operating the UV cleaning system, air flow in and around the unit (lamp
housing) must remain unobstructed to prevent the unit from overheating.
If the temperature inside the unit reaches above 65 °C, the unit will automatically switch off to
prevent overheating. Switch off the system and allow it to cool back to room temperature before
resuming use.
I. IMPORTANT NOTE: Excessive cooling will diminish the lamp’s operating voltage
and effectiveness, whereas Inadequate cooling may cause damage to system
components.
3.9 Health and Safety –Servicing
I. Service or installation work that includes integrating electrical components should
only be performed by an Ossila engineer. Never alter the wiring of any purchased
equipment. If changes are made, such alterations may damage the equipment,
cause injury, or death. At the very least, such alterations will void your equipment’s
warranty.
II. If the fuses located in the fuse drawer at the back of the unit need changing, the
unit must be placed in a safe mode by switching the unit off and disconnecting the
power cord from the power socket.
4. Unpacking
4.1 Packing List
The standard items included with the UV Ozone Cleaner are:
•UV Ozone Cleaner unit
•Power cord set (specific for country of operation)

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•User guide manual on a USB stick.
4.2 Damage Inspection
Examine the components for evidence of shipping damage. If damage has occurred, please
contact Ossila directly for further action.
The UV lamp is a mercury vapour lamp. The consumer may be exposed to mercury only if the glass of the lamp
is cracked or broken. If this happens, please contact Ossila after abiding by these rules to minimise exposure:
1. Leave the room under ventilation for at least 15 minutes.
2. Using cut-resistant gloves, collect any escaped glass pieces in a sealed container and close
it tightly.
3. Store the container and UV Ozone cleaner in a fume hood until they can be taken to the
next collection point for waste lamps.
5. Specifications
The UV Ozone Cleaner specifications are shown in Table 5.1.

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Table 5.1. UV Ozone Cleaner Specification.
UV Ozone
Specifications
UV Lamp
Synthetic quartz UV grid lamp
UV lamp key wavelengths
185 nm and 254 nm
Power supply
230V ± 10 %; 50/60Hz, 50 VA
Class of protection
Class I
Degree of protection
IP20
Maximum run time
59 minutes and 59 seconds
Safety features
Drawer safety switch; thermal cut-out
Unit dimensions
Width: 193 mm
Height: 230 mm
Depth: 300 mm
Tray dimensions
100 mm x 100 mm
Fuses
1 A slow blow
Weight
5 kg
Warning: The unit contains a source of high voltage.
Internal UV lamp supply
4 KV no load across secondary terminals or
2 KV no load to earth (max); 30 mA
6. System Components
The UV Ozone Cleaner L2002A comprises of two items:
•UV Ozone Cleaner unit (Figure 6.1).
•Power supply cord (Figure 6.2). The UV Ozone Cleaner unit is powered by 230V, 50/60Hz
supply, Countries with a 110V power supply are supplied with an additional power
transformer.

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Figure 6.1. Ossila’s UV Ozone Cleaner.
Figure 6.2. Main power cord adapter. Plug shown is for United Kingdom; the UV Ozone Cleaner ships with a
suitable plug for the country of purchase.
7. Installation
1. Place the unit on a solid, level surface inside a fume cupboard.
i. Ensure the area is free from vibrations, temperature extremes and highly
flammable or explosive materials.
2. Before plugging in the UV Ozone Cleaner, ensure the power switch on the unit is
switched to the ‘0’ position (off).

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3. Connect the power cord to the UV Ozone Cleaner unit.
i. See Figure 7.1 to see how to connect the UV Ozone Cleaner to the power supply
cable.
4. Switch the UV Ozone Cleaner power switch to the ‘I’ position to turn on.
Figure 7.1. Installation of the UV Ozone Cleaner by plugging in the power cord cable.
8. Operating the UV Ozone Cleaner
8.1 UV Ozone Cleaner Overview
A top-down view of the UV Ozone Cleaner is shown in Figure 8.1, with all the relevant components
highlighted. Figure 8.2 shows the power cord socket, fuse socket, and the power switch.

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Figure 8.1. UV Ozone Cleaner front panel image.
Clear LCD display
Durable metal
casing
Simple keypad for
programming
Tray to place the
substrate
Internal safety interlock
prevents the lamp being on
when tray is open

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Figure 8.2. UV Ozone power switch, fuse socket, and power socket position on the back panel.
8.2 UV Ozone Cleaner User Interface
Figure 8.3 shows the front panel of the UV Ozone cleaner, where the function of each of the keypad
buttons is explained in Table 8.1.
Figure 8.3. UV Ozone Cleaner LCD screen and keypad.
Fuse socket
Power switch
Power socket
Electrical Fuse (1A)

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Table 8.1. Operational buttons and their associated functions.
Button
Function
START
Starts operation for the Set Time programmed.
STOP
Terminates the running program and resets the Set Time to zero.
MIN
Increment the set time by 1 minute.
Decrement the set time by 1 minute.
SEC
Increment the set time by 1 second.
Decrement the set time by 1 second.
Increment the set time by 10 seconds.
Decrement the set time by 10 seconds.
8.3 Practical Operation
Operate within fume cupboard in room with suitable air ventilation at all times.
1. Open the tray door.
2. Load your sample to be cleaned carefully onto the tray.
I. The tray surface may become slippery with use of the UV Ozone Cleaner;
take care to avoid your sample sliding off the surface.
II. WARNING: Should your sample fall inside of the UV Ozone Cleaner unit, do
not attempt to retrieve it. Doing so may result in damage to the unit or
personal injury. The UV Ozone Cleaner can operate safely should small
objects fall off the tray provided the tray door can close fully.
3. Program the UV Ozone Cleaner with the desired Set Time and run the program (see
section below).
4. Once the program has finished, open the tray door and remove your sample.
8.4 Program Operation
WARNING! High voltage
The UV lamp can operate at a maximum of 4000 V. Avoid any electrical cables or solvents
around the UV Ozone Cleaner.

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WARNING! Ultraviolet light
The low-pressure mercury vapour grid lamp inside this equipment emits harmful UV
radiation. Avoid exposure at all times.
WARNING! Inhalation hazard
Ozone is produced by this equipment during operation. Use only inside a fume cupboard
and in an area where appropriate ventilation is available.
1. Turn the UV Ozone Cleaner power switch on (position ‘I’); the bootup screen is shown
Figure 8.4.
Figure 8.4. Bootup screen.
2. During the bootup time, the user can enter the buzzer setting and temperature
reading menu screens for the UV Ozone Cleaner.
I. Press and hold both single-increment second buttons (up and down) at the
same time to see the temperature readings display as in Table 8.2.

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Table 8.2. Temperature readings display.
Buttons
Display
II. Press and hold both double-increment second buttons (up and down) at the
same time to enter the buzzer settings as in Table 8.3
III. To change the buzzer settings, press the single-increment up second button
to turn the buzzer sound on, or the single-increment down second button to
turn the buzzer sound off.
Table 8.3. Buzzer settings menu.
Buttons
Display
3. To exit the Settings page, press the START button to proceed to the Caution page.
4. The user must read the instructions and press START to enter the main screen of the
UV Ozone Cleaner as shown in Figure 8.5.

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Figure 8.5. Instruction screen.
5. Modify the Set Time using the Minute (MIN) and Second (SEC) buttons on the keypad.
The maximum value of the timer is 59 min 59 secs as in Figure 8.6.
Figure 8.6. Set time screen.
6. Once the timer has been set, press the START button to run the program. The LCD will
display the following information as in Figure 8.7.
I. The Elapsed timer will begin and the LED indicator light will switch on.
II. When the Elapsed time matches the Set Time, the one-note buzzer will sound
- indicating the program has finished.
III. While the program is running, the user can stop the program by pressing the
STOP button. This will also reset the Set Time to 00:00.