Kendro HERAsafe KS User manual

Safety Cabinet HERAsafe KS / KSP
Operating Instructions
Valid: 12.2004 / 50077476 C

Operating Instructions Safety Cabinet HERAsafe KS / KSP
2
Copyright
These operating instructions are protected by copyright. Rights resulting the-
reof, particularly reprint, photomechanical or digital postprocessing or reproduc-
tion, even in part, are only allowed with the written consent of Kendro Laboratory
Products GmbH.
This regulation does not apply to reproductions for in-plant use.
Trademarks
HERAsafe®and Heraeus are registered trademarks of Kendro Laboratory Pro-
ducts GmbH. All other trademarks mentioned in the operating instructions are
the exclusive property of the respective manufacturers.
Kendro Laboratory Products GmbH
Robert-Bosch-Straße 1
D - 63505 Langenselbold
Germany

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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Contents
1. General notes ......................................................................................... 6
1.1 Safety instructions .......................................................................... 6
1.2 Warranty ......................................................................................... 7
1.3 Explanation of symbols................................................................... 7
1.3.1 Symbols used in the operating instructions: ............................ 7
1.3.2 Symbols on the device: ............................................................ 8
1.4 Use of the device ............................................................................ 9
1.4.1 Correct use ............................................................................... 9
1.4.2 Incorrect use: ............................................................................ 9
1.5 Standards and safety regulations ................................................. 10
2. Delivery ................................................................................................. 11
2.1 Standard components ................................................................... 11
2.2 Acceptance inspection.................................................................. 11
3.1 Ambient conditions ....................................................................... 12
3.2 Room ventilation ........................................................................... 12
3.3 Correct location ............................................................................. 13
3.4 Installation in series ...................................................................... 13
3.5 Transport ....................................................................................... 13
4. Description ........................................................................................... 14
4.1 Overall view .................................................................................. 14
4.2 Safety system ............................................................................... 17
4.3 Filter system ................................................................................. 18
4.4 Controls and display ..................................................................... 20
4.5 Sample chamber access .............................................................. 21
4.6 Device interfaces .......................................................................... 22
4.7 UV lamp unit ................................................................................. 24
4.8 Working area................................................................................. 24
5.1 Initial operation ............................................................................. 25
5.2 Installing unit and accessories ..................................................... 25
5.3 Levelling the cabinet ..................................................................... 28
5.4 Activating the remote control ........................................................ 28
5.5 Power supply connection ............................................................. 29
5.6 RS 232 interface connection ........................................................ 31
5.7 UV connection .............................................................................. 31
5.8 Installation test .............................................................................. 32
6. Handling and control ........................................................................... 33
6.1 Display .......................................................................................... 33
6.1.1 Functions of the display components ..................................... 33
6.1.2 Display during the calibration routine ..................................... 34
6.1.3 Display in OFF mode .............................................................. 34
6.1.4 Display in work mode ............................................................. 34
6.1.5 Power interruption .................................................................. 34
6.1.6 Display and functions after a power failure ............................ 34
6.1.7 Failure messages ................................................................... 34
6.2 Description of the operating modes ............................................. 35
6.3 Remote control ............................................................................. 37
6.3.1 Basic functions ....................................................................... 37
6.3.2 Moving the front window to the working position ................... 38
6.3.3 Silencing the audible alarm signal ......................................... 39
6.3.5 Activating and deactivating the internal power supply ........... 40
6.3.6 Displaying the UV disinfection time ........................................ 41

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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Contents
6.3.7 Activating and deactivating the potential-free contact (optional)41
6.3.8 Switching the cabinet to OFF mode ....................................... 41
6.3.9 Setting the time ....................................................................... 42
6.3.10 Displaying the downflow velocity ........................................... 43
6.3.11 Displaying the operating hours of the HEPA filters ................ 43
6.3.12 Displaying the Kendro Performance Factor ........................... 44
6.3.13 Setting and activating the timer .............................................. 45
6.3.14 Deactivating the timer ............................................................. 46
6.3.15 Setting the UV disinfection time ............................................. 47
6.3.16 Starting the UV disinfection .................................................... 47
6.3.17 Cancelling the UV disinfection ............................................... 48
6.3.18 Activating the stop watch ....................................................... 48
6.4 Pilot switch .................................................................................... 49
6.4.1 Moving the front window: ....................................................... 49
6.4.2 Silencing the audible alarm signal: ........................................ 50
6.4.3 Switching the device to OFF mode ........................................ 50
7. Operation .............................................................................................. 51
7.1 Hygiene preparations for the sample chamber ............................ 51
7.2 Preparing the sample chamber .................................................... 51
7.3 Response to failure messages ..................................................... 52
7.4 Work rules ..................................................................................... 53
8. Shut-down............................................................................................. 54
8.1 Interrupting an operation .............................................................. 54
8.2 Shutting the unit down .................................................................. 54
9. Cleaning and decontamination .......................................................... 55
9.1 Decontamination procedure ......................................................... 55
9.2 Wipe/spray disinfection................................................................. 55
9.3 UV disinfection after a wipe/spray disinfection ............................ 57
9.3.1 UV disinfection using the integral UV lamps .......................... 57
9.3.2 UV disinfection using a mobile UV device ............................. 57
9.4 Disinfection with formaldehyde .................................................... 57
9.5 Cleaning the exterior surfaces ...................................................... 58
9.6 Cleaning the floorpan ................................................................... 58
10. Maintenance ......................................................................................... 59
10.1 Inspection...................................................................................... 59
10.2 Service .......................................................................................... 59
10.2.1 UV lamps ................................................................................ 59
10.2.2 Sample chamber illumination ................................................. 60
10.3 Retrofitting and repairs ................................................................ 61
11. Disposal ................................................................................................ 62
11.1 Disposal procedure ...................................................................... 62
12. Technical data ...................................................................................... 63
13. Device log ............................................................................................. 68
14. Certificate of decontamination ........................................................... 69

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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Figures
Fig. 1 Device locations in a room ...........................................................13
Fig. 2 Lift points ......................................................................................13
Fig. 3-a Overall view / Version KS .............................................................15
Fig. 3-b Overall view / Version KSP .......................................................... 16
Fig. 4-a Filter system with prefilters, downflow filter and exhaust
air filter / Version KS .....................................................................18
Fig. 4-b Filter system with prefilters, downflow filter and exhaust
air filter / Version KSP ..................................................................19
Fig. 5 Controls and display .....................................................................20
Fig. 6 Display with remote control sensor ..............................................20
Fig. 7-a Access through front cover ..........................................................21
Fig. 7-b Access through front window .......................................................21
Fig. 8 Supply interfaces ..........................................................................22
Fig. 9 UV lamp unit .................................................................................24
Fig. 10 Working area on the workplate .................................................... 24
Fig. 11-a Rack installation / Version KS ......................................................25
Fig. 11-b Installation / Version KSP ............................................................. 26
Fig. 11-c Drain valve installation .................................................................27
Fig. 12 Inserting the batteries ................................................................... 28
Fig. 13 RS 232 interface connection ........................................................ 31
Fig. 14 UV connection ..............................................................................31
Fig. 15 Functions of the display components .......................................... 33
Fig. 16 Basic functions of the remote control ........................................... 37
Fig. 17 Basic functions of the pilot switch ................................................49
Fig. 18 Sitting posture ..............................................................................53
Fig. 19 Front cover seal replacement ......................................................60

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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1. General notes
The following are the addresses of the international Kendro
Sales Organisations.
1.1 Safety instructions
These safety instructions describe the safety features of the HERAsafe series
and apply to the models KS 9/12/15/18.
The safety cabinet has been manufactured in keeping with the latest techno-
logical developments and has been tested before delivery for its correct func-
tion. It may, however, present potential hazards if it is not used according to the
intended purpose or outside of operating parameters. Therefore, the following
procedures must always be observed:
• The safety cabinet must be operated only by trained and authorized personnel.
• For any operation of this unit, the operator must prepare clear and concise
written instructions in the language of the operating and cleaning personnel
based on these operating instructions, applicable safety data sheets, plant
hygiene guidelines, and technical regulations, in particular:
• which decontamination measures are to be applied for the cabinet and
accessories,
• which protective measures apply while specific agents are used,
• which measures are to be taken in the case of an accident.
• Repairs to the device must be carried out only by trained and authorized expert
personnel.
• The contents of the operating instructions are subject to change without
further notice.
• Concerning translations into foreign languages, the German version of these
operating instructions is binding lease.
• Keep these operating instructions close to the unit so that safety instructions
and important information are always accessible.
• Should you encounter problems that are not detailed adequately in these ope-
rating instructions, please contact Kendro Laboratory Productsimmediate-
ly for your own safety.
Postal address Germany
Kendro Laboratory Products GmbH
Robert-Bosch-Straße 1
D - 63505 Langenselbold
Anfragen aus Deutschland
Telefon
Vertrieb 0800 1 536376
Service 0800 1 112110
Fax
Vertrieb/Service 0800 1 112114
E-Mail [email protected]
Enquiries from Europe, Middle East
and Africa
Tel. + 49 (0) 6184 / 90-6940
Fax + 49 (0) 6184 / 90-7474
E-Mail [email protected]
Postal address USA
Kendro Laboratory Products Inc.
275 Aiken Road
Asheville, NC 28804
USA
Enquiries from North America
Phone [phone]
Fax [phone]
E-Mail [email protected]
Enquiries from Latin America
Phone [phone]
Fax [phone]
E-Mail [email protected]
Enquiries from Asia Pacific
Phone [phone]
Fax [phone]
E-Mail [email protected]

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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1. General notes
1.2 Warranty
Kendro Laboratory Products warrant the operational safety and functions of the
safety cabinet only under the condition that:
• the device is operated and serviced exclusively in accordance with its intended
purpose and as described in these operating instructions,
• the device is not modified,
• only original spare parts and accessories that have been approved by Kendro
Laboratory Products are used,
• inspections and maintenance are performed at the specified intervals,
• an installation test is performed prior to the initial operation of the device and
that a repeat test is performed on the occasion of all inspections and repairs.
The warranty is valid from the date of delivery of the device to the operator.
1.3 Explanation of symbols
1.3.1 Symbols used in the operating instructions:
WARNING!
is used if non-observance may cause serious
or even lethal injuries.
CAUTION!
is used if non-observance may cause medium
to minor injuries or damage.
NOTE!
is used for hints and useful information.
RECYCLING!
Valuable raw materials can be reused.

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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1. General notes
1.3.2 Symbols on the device:
Betriebsanleitung beachten (Decke Schaltraum)
Observe operating instructions (cover electrical box)
Cytostatic agents (left device front)
Checked safety (Cover light dome)
T5A note (sample chamber fusing)
RS 232 interface (connection label)
Armrest installation
(right side of light dome)

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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1. General notes
1.4 Use of the device
1.4.1 Correct use
KS version:
The safety cabinet is a laboratory device for installation and operation in micro-
biological and biotechnical laboratories of safety levels 1, 2, and 3. It has been
designed as a Class II microbiological safety cabinet, in accordance with EN
12469 / 2000.
Depending on the hazard level of the agents involved, the operator must pre-
pare in writing appropriate decontamination procedures for the device and the
accessories used in the sample chamber.
KSP version:
The safety cabinet also meets the requirements from DIN 12980 of 2/2004 and
can be used for the production of cytostatic agents.
For cytostatic agent applications, use the lowered one-piece working plate only.
Prior to the initial operation of the cabinet, the operator must perform an instal-
lation test. The test result must be documented by a test report. The cabinet must
only be released for operation if it is in compliance with the operating parame-
ters specified by Kendro Laboratory Products.
After any changes to the installation conditions or after any modification to the
technical system, a repeat test must be performed and the test result must be
documented by a test report that shows that all operating parameters are in com-
pliance with those specified by Kendro Laboratory Products.
1.4.2 Incorrect use:
The safety cabinet must not be used in laboratories that do not comply with the
requirements of safety levels 1, 2, and 3.
The unit must not be operated as a Class II safety cabinet, if:
• no repeat test is performed after changes to the installation conditions or after
modifications to the technical system,
• the alarm system of the device has issued a failure message and the cau-
se for the failure has not been repaired.
The alarm system must not be tampered with or disabled. If alarm system com-
ponents heve been removed or disabled for service or repairs, the unit must only
be released for operation if all alarm system components are functioning again
properly.
The filters installed in the device are not capable of separating gaseous sub-
stances. Therefore, do not work with or store substances in the device:
• who in quantity or concentration are toxic,
• if a reaction with other substances may result in hazardous toxic concentrations
or formation of toxic gases,
• that may form combustible or explosive mixtures in combination with air.

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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1. General notes
1.5 Standards and safety regulations
The device complies with the safety requirements of the following standards and
guidelines:
• IEC 1010-1 / EN 61010-1
• EN 12469 / 2000
• DIN 12980 / 1996 (E DIN 12980 / 2'2004)
• Low Voltage Directive 73/23 EWG
• EMC Directive 89/336 EWG

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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2. Delivery
2.1 Standard components
Delivery for the safety cabinet includes the following:
Version KS:
• safety cabinet,
• remote control,
• drain valve.
Version KSP:
• safety cabinet
• remote control
• armrests
• rack
All versions:
• Device documentation:
— operating instructions,
— factory test report.
Optional components and accessories are listed as separate items in the deli-
very document.
2.2 Acceptance inspection
After the device has been delivered, immediately check the device:
• for completeness,
• for possible damage.
If the delivery is incomplete or if you detect any transport damage to the
device, contact the forwarding agency and Kendro Laboratory Products
immediately.

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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3. Installation
3.1 Ambient conditions
The operational safety and correct function of the unit depend on the location
where it is to be operated. The safety cabinet must be operated only at locati-
ons that meet the ambient conditions listed below.
Location requirements:
• The electrical system of the device has been designed for an operating height
of up to 2000 m above sea level.
• The mains power supply outlets should be out of casual reach to prevent ac-
cidental shut-off. Ideally, the outlets should be installed above the safety
cabinet.
• The flooring of the location must be adequately strong and not flammable.
• The room in which the device is installed must be of adequately height. For
units not connected to an exhaust system, the distance between the exhaust
air opening and the room ceiling must be at least 200 mm (8 in).
• The location must be equipped with an appropriate ventilation system
(see Section 3.2.).
• The temperature within the room must be between 15° C and 40° C
(49° F and 104° F).
• The relative humidity in the vicinity of the device must not exceed 90 %.
NOTE - Ambient conditions!
If ambient conditions vary from those descri-
bed above, please contact Kendro Laborato-
ry Products for assistance in installing the
device.
NOTE - Temporary storage!
If the device is stored only temporarily (up to
four weeks), the ambient temperature may be
between -20° C and +60° C (-4° F and +140° F)
at a relative air humidity of up to 90 %. For lon-
ger storage periods, the location requirements
apply.
3.2 Room ventilation
The room ventilation should preferably be a ventilation system that complies with
the national requirements for the application.
• The inlet air and exhaust air openings of the room ventilation must be located
so that drafts are prevented from impairing the function of the safety cabi-
net air system.

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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Fig. 1
Locations in a room
Fig. 2
Lift points
3. Installation
3.3 Correct location
Choose a draft-free location where the safety cabinet does not
interfere with the plant traffic.
Fig. 1: This figure shows preferred locations for safety cabi-
nets and unsuiable locations, not in accordance with the safety
requirements.
Unsuitable locations: The locations [1], [2], and [3] are not
suitable because they are exposed to drafts from windows and
doors.
Location [5] is undesirable because it is in range of plant traffic
and within the exhaust air range of a ventilation system [4].
Preferred locations [6], [7], and [8] are correct because they
are in a draft-free section of the room and not exposed to plant
traffic.
3.4 Installation in series
When several devices are to be installed in series, please ob-
serve the following:
• Make sure that vibrations cannot be transferred between
adjacent units.
• Exterior surfaces of the cabinets must always be accessible
for cleaning and disinfection.
3.5 Transport
Version KS:
Fig. 2: To prevent tilting, always transport the device using a
suitable carrier, even for a transport within a building, and se-
parate it from the rack.
NOTE – Lift points
For transport, lift the unit only at the lift points
shown in Figure 2.
Do not allow the weight of the cabinet to rest
on the floorpan!
Version KSP:
If required, the device frame must be removed from the rack
to be reinstalled onto the rack for the initial start-up after the
transport (see Section 5.2).

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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4. Unit description
4.1 Overall view
Version KS:
•Fig. 3a: Plenum assembly [5] with plenum for downflow blower [24] and
plenum for exhaust air blower [2]. The downflow filter and the exhaust air filter
are installed directly to the pertaining blower. The exhaust air is released into
the environment around the device through the opening [1].
• At the side of the plenum, the optional media supply lines [25] are routed into
the sample chamber [20].
• Electrical box [4] with power supply cable [3]. An RS 232 connection to a PC
and two fuse holders are installed at the front of the electrical box.
• Front cover [6] with integral, electrically movable front window [7], operated by:
• the pilot switch [26],
• the remote control [28].
The gas struts [22] secure the front cover in the open state.
Optionally, two safety latches [27] can be installed to the front cover so that
the door can be protected against unauthorized opening.
• The light dome [23] with two tubes is part of the front cover assy.
• Side slates [9] with two sealed access openings [19]. These can be equip-
ped with media valves [13].
• Internal outlets [10] for power supply of accessories and adapter [11] for mobile
UV device.
• Optional UV lamp unit [8] consisting of two UV lamps per side.
• Optional stands [12], adjustable in height (KFS 2) and with fixed height
(KFS 1).
• Workplate segments [15] with optional arm rests [16]. A one-piece workplate
and special workplates are available options.
• Lockable drain valve [17] for installation into floorpan.
• Display [21] with remote control sensor and alarm system LEDs.
• Test hoses for the supply unit [18] at the left side of the sample chamber and
for the exhaust unit [14] at the right side of the sample chamber.
NOTE – Test hoses!
Do not remove the two test hoses for checking
downflow and exhaust air.

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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4. Unit description
Fig. 3
Overall view / Version KS

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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4. Unit description
Version KSP:
•Fig. 3b: Rack [5] with integral prefilter housing [6].
• Filter inserts [2] for the prefilter housing. The number of supplied filter in-
serts depends on the width of the device. To protect from liquid residues,
the filter inserts are oriented slightly sloping from the device backpanel to
form a drain duct to the floorpan [3].
The filter plates [4] have tongues and grooves and are inserted in an over-
lapping pattern from right to left.
• Membrane sleeve or opening for filling with aerosole for testing the filter of
the downflow unit [1] at the left side of the sample chamber and of the ex-
haust air unit [7] at the right side of the sample chamber.
Fig. 3b
Overall view / Version KSP

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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4. Unit description
4.2 Safety system
The safety system comprises a combination of protective and alarm systems
that ensure maximum personal and material protection.
Safety systems:
•Vacuum-sealed air system
A vacuum-sealed air system in combination with HEPA filters for downflow
and exhaust air forms the basis of the safety system for personal and ma-
terial protection.
• Personal protection
Air aspired from the exterior along the entire working opening at a constant
high velocity prevents that:
• agents may leak through the working opening of the chamber.
As the exterior air pressure around the unit exceeds the pressure of the in-
ternal air system (vacuum sealing), it is ensured that:
• agents cannot be released to the exterior in the case of a leak in the
cabinet housing.
• Material protection
A steady airflow within the air system ensures that:
• a constant downflow allows the HEPA filters to remove contaminants
so that the samples are always surrounded by ultrapure air,
• harmful particles are not carried over through the sample chamber
(protection from cross-contamination).
•HEPA filters
The downflow (i.e. the air circulating within the device) and the exhaust air
(air that is released to the exterior) are cleaned by HEPA filters (HEPA = High
Efficiency Particulate Air Filter).
For version KSP, a prefiltering system is used to increase the filter efficien-
cy and to protect the exhaust air and downflow systems.
• Safety lockout
To protect from UV radiation, the optional UV disinfection routine can be run
only if the front opening is closed. During UV disinfection, the front opening
safety lockout is activated and prevents harmful UV radiation from being
emitted from the sample chamber.
Warning system:
• Airflow monitoring
Airflow monitoring determines the velocity of the airflow in the sample chamber
as well as the inflow velocity of the air aspired from the exterior through the
working opening. As soon as airflow velocities move above or below a spe-
cified safety value, a signal is transmitted to the alarm system.
• Visual and audible alarm system
The warning system constantly monitors the safety-relevant device functions:
• Inflow velocity of the air aspired from the exterior,
• downflow velocity,
• working position of the front window.
If the warning system detects changes to one of these device functions, it
issues:
• an audible and a visual alarm signal.

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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4. Unit description
•Position monitoring
The position sensors monitor the position of the front co-
ver as well as the movement of the front window; it will in-
dicate when the front window is in the working position.
•Kendro Performance Factor
The Kendro Performance Factor (PER) is a value that in-
dicates the safety state of the safety cabinet. This value is
calculated from data determined by the safety system and
from values captured empirically by service personnel during
safety checks. This data is entered into a parameter list of
the control software and interconnected. The result can be
indicated by the display.
4.3 Filter system
Version KS:
Fig. 4: The filter system consists of two HEPA filters [2] and
[5] for the circulating air and for the exhaust air and of a coarse
filter for the aspired air.
HEPA filters: Room air [10] is drawn into the sample cham-
ber through the working opening. In the air duct, room air and
the downflow within the chamber [7] are then blended to make
up the blend air [9]. The blend air is then:
• filtered proportionally by the downflow filter [5] and supp-
lied as ultrapure air [6] evenly into the sample chamber of
the device,
• filtered by the exhaust air filter [2] and released as ultra-
pure air [1] to the exterior of the device.
Inlet air protection: The air duct between the sample chamber
and the device plenum has an inlet air protection [8] below the
working surface to prevent coarse particles from entering the
plenum where they may impair blower [3] und [4] and filter
functions.
Fig. 4a
Filter system with prefilters,
downflow filter and exhaust air
filter / Version KS

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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4. Unit description
Version KSP:
Fig. 4b: The filter system consists of a set of HEPA prefilters
[10] (the number of filters depends on the sample chamber
width) and two HEPA filters [2] and [5] for downflow air and
exhaust air.
HEPA prefilters:
The compact size of the filter inserts allows filter replacement
with minimal contamination hazard. The use of the prefilters
protects the downflow and exhaust air filters considerably.
The filter inserts used are HEPA filters of Class H14 (accor-
ding to DIN EN 1822). Alternatively, activated carbon filters can
be inserted into the housing to protect from smells.
Room air [11] is drawn into the sample chamber through the
working opening. In the air duct above the prefilter, room air
and the downflow within the chamber [7] are then blended to
make up the blend air [8]. The blend air is then:
• aspirated into the prefilter [10], filtered and fed into the air
duct [9].
HEPA filters: From the air duct, the prefiltered air is:
• filtered proportionally by the downflow filter [5] and supp-
lied as ultrapure air [6] evenly into the sample chamber of
the device,
• filtered by the exhaust air filter [2] and released as ultrapure
air [1] to the exterior of the device.
Fig. 4b
Filter system with prefilters,
downflow filter and exhaust air
filter / Version KSP

Operating Instructions Safety Cabinet HERAsafe KS / KSP
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4. Unit description
4.4 Controls and display
Fig. 5: The safety cabinet is equipped with two separate control
elements that operate independently of each other:
• remote control [3],
• pilot switch [1].
The status indicators of the display [2] indicate control opera-
tions initiated with the control elements.
Remote control: All device functions can be activated and
deactivated easily using the remote control.
Pilot switch: Use to control all basic functions required for the
operation. This switch allows you to operate the safety cabi-
net if the remote control is not operational or available.
Fig. 6: The display [1] can show text or numeric values and
has 12 LEDs [2] and [4] to indicate the current operational state
of the unit.
The display module also houses the sensor system for the re-
mote control. The pulses transmitted are best received by the
sensor if the distance Abetween the remote control [5] and the
sensor [3] does not exceed 1m and if the radio signal beam
does not deviate more than 15° horizontally.
The transmission range of the remote control also depends on
the battery state of charge.
Fig. 5
Controls and display
Fig. 6
Display with remote control
sensor