COVVI Nexus User manual

www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
Technical Manual
THE NEXUS HAND

Anything Is
Possible

Foreword
COVVI was founded in 2017 by a passionate and experienced team who wanted to
continue to create leading prosthetic designs.
The human hand is amazing and the level of functionality which can be restored through
prosthetics has historically been very low; but as engineers and designers we see this
as a challenge to continuously improve our designs to meet the needs of users. COVVI
started with a blank sheet of paper and a mission to address some of the most prevalent
deficiencies of current prosthetic hands.
Fast forward to present day and we now have the fastest, strongest, and best-looking
prosthetic hand in the market.
The COVVI Team

00 | Page 04www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
Introduction 06
1.1 What Defines Us? 06
1.2 The Path to the Nexus Hand 06
1.3 Engineering Behind Nexus 07
What’s Inside 10
2.1 The Hand Kit 10
2.2 The Hand Kit Part Numbers 11
2.3 The Advantage Kit 12
2.4 The Advantage Kit Part Numbers 13
Technical Information 14
3.1 Nexus Glove Overview 14
3.2 Nexus Hand Overview 15
The Nexus Hand 17
Environmental Conditions 18
Safety Guidelines 19
6.1 Abuse & Neglect 19
6.2 IP44 19
6.3 Harsh Chemicals/Abrasives 19
6.4 Operating a Vehicle 20
6.5 Firearms 20
6.6 Sporting Activities 20
6.7 Safety Precautions 21
The Nexus Hand Overview 22
7.1 Connecting/Disconnecting the Nexus Hand 22
7.2 E-Paper Screen 24
Why Nexus? 26
8.1 Passively Flexing Fingers and Thumb 26
8.2 Integrated Flex Wrist 27
8.3 Intuitive Thumb Control/Smart Switching 28
8.4 Water and Dust Resistant (IP44) 28
8.5 The Index Fingertip is Touch Screen Compatible 29
8.6 Remote Firmware Updates 29
8.7 Various Grip Switch Triggers 29
Grip Patterns 30
9.1 Opposed Grips 30
9.2 Non-opposed Grips 32
The Nexus Thumb 34
Contents

00 | Page 05www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
Contents
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
The COVVI Power Supply 36
11.1 Contents 36
11.2 Warnings 39
11.3 Power Supply Overview 40
11.4 The Batteries 41
11.5 Activating the System 42
11.6 Changing the Display Mode 43
11.7 Charge Indication 44
11.8 Fitting the COVVI Power Supply 46
11.9 System Specification 48
11.10 System Compatibility 52
11.11 Battery Replacement 52
11.12 Maintenance 53
Component Compatibility 54
COVVI Go App 58
13.1 COVVI Go 58
13.2 Registration 59
13.3 Hand Selection 59
13.4 Input Settings 61
13.5 Setup Wizard 65
13.6 Sensor Interface Screen 65
13.7 Operating Modes 66
13.8 Grip Tables 68
13.9 Grip Switch Triggers 69
13.10 Additional Setup 72
13.11 Changes 75
13.12 Advanced Configuration 76
13.13 Config History 77
13.14 Report a Bug 77
13.15 Reset to Default 77
13.16 Remote Firmware Updates 78
13.17 Custom Firmware Update 79
Maintenance 80
Warranty 81
15.1 24-Month Manufacturer’s Warranty 81
15.2 Optional Extended Warranty of up to 36 Additional Months 82
Warranty Service and Repairs 83
16.1 Limited Liability 83
Returns 84
Disposal 85
Symbols Used 86
EU Declaration of Conformity 87

00 | Page 06www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
1.0 Introduction
Our name was formulated to reflect our single driving intention to change multiple lives together forever through
harnessing endless connections to make anything possible. With our name came our ‘delta’ logo, which also
has meaningful origins as a symbol of change and doing things dierently.
1.1 What Defines Us?
COVVI is a portmanteau of the Latin ‘Coperor’ and ‘Vita’, translating as ‘working together’ and ‘life’.
1.2 The Path to the Nexus Hand
The Nexus Hand was born from a genuine passion for prosthetics and helping others. Through 10 years of
working in the industry alongside clinicians and listening to users we have developed a sincere appreciation
for how dicult prosthetics are to use and how poor devices do not address or resolve this. After the initial
excitement of a new device, these frustrations frequently result in the prosthetic device being rejected, which
we see as a personal failure. In today’s world there are so many products and designs that we simply do
not need, yet in the field of prosthetics so much is still to be done. As a team we could not envisage more
rewarding work than developing a cutting-edge prosthetic hand that overcomes as many of these issues as
possible, so we made it our absolute mission to do so. We truly want to reduce the restrictions and limitations
prosthetic users face every day.
We designed the Nexus Hand with your patient in the forefront of our minds and we want it to be an invaluable
tool in their life. Our two main goals were to make it functional and robust and we are confident it not only
enables the easy performance of daily tasks but can withstand anything life throws at it! We always aim to
develop desirable products, which is why we use only the best materials and pride ourselves on our unrivalled
industrial design. After years of hard work, drive, and passion it makes us immensely proud to see our design
working as intended and actively simplifying people’s lives.

00 | Page 07www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
1.0 Introduction
1.3 Engineering Behind Nexus
Stainless Steel
Finger Pivot
E-Paper Screen
High Impact
Polymer Chassis
Stainless Steel
Knuckle
Cast Aluminium Digit
Components
Stainless Steel
Finger Link
Stainless Steel
Finger Chassis
Machined Aluminium
Wrist Housing
High Chromium
Steel Wrist Plate
ESD Pathway
Stainless Steel
Thumb Pivot

00 | Page 08www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
1.0 Introduction
Our hand size range is suitable for all adults and most adolescents. At COVVI, we started with the small Nexus
Hand and built bigger. This ensured we did not compromise on any functionality across the size range where
in the past engineers had always started big and tried to shrink their design down, which was challenging to
do without losing some of the hand’s function. We are extremely proud of our compact design and cannot
wait to see your patient bring it to life!
Note: This infographic below should only be used as a guide. Please take measurements of hands from clinical data.
Note: TASKA is owned by 5TH ELEMENT LIMITED, Bebionic is owned by Otto Bock HealthCare GmbH, i-Limb is owned by Touch
Bionics Limited.
i-Limb XS
Bebionic Medium
Nexus Small
Bebionic Small
Michelangelo
Nexus Medium Nexus Large
i-Limb Large
TASKA (8¼”)

00 | Page 09www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
The Nexus Hand was designed to withstand the necessities of daily activities; however, it should not be subject
to excessive force. Please refer to section 6.0 for more information on our safety guidelines. As seen in section
12.0, please note that the Nexus Hand is recommended with COVVI products.
The Nexus Hand should only be fitted by a Certified Prosthetist.
This symbol is used in instances to warn about hazardous or dangerous materials
and/or objects and will be used throughout this document.
We do not recommend the use of carbon fibre materials in a fabricated socket
unless it is grounded to the carbon fibre lamination.
CAUTION
PRECAUTIONS FOR HANDLING
ELECTROSTATIC SENSITIVE DEVICES.
This product uses semiconductors that can be damaged by electrostatic discharge
(ESD). The Nexus Glove can be removed, but no further disassembly can be done.
All disassembly and/or repairs below this level can only be conducted by certified
technicians with training from COVVI. Any disassembly performed by unauthorised
personnel will not be covered under warranty.
1.0 Introduction

00 | Page 10www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
2.0 What’s Inside
2.1 The Hand Kit
To remove the Nexus Hand from its packaging, first slide foam piece 1 vertically out of the box, then slide the
rest of the foam pieces along into the gap left by foam piece 1. Lift the hand from the box by foam piece 2 and
5 and slide both o from the EQD and fingertips, respectively. To replace the Nexus Hand back into the box,
follow the steps in reverse. Please take care with the orientation of the foam pieces.
Right
Knuckle Foam
Order of Disassembly
Removable Insert for
Medium & Large
Left
2 3 5 4 1

00 | Page 11www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
2.0 What’s Inside
2.2 The Hand Kit Part Numbers
Example Part Numbers: CV1LSQBLCA21####
CV1 |L | S |Q |BL |CA |21 |####
Fixed Part Numbers
CV1 Product Code
QEQD
BL Glove Colour (Black)
21 Year Manufactured
#### 4 Digit Serial Number
Customisable Part Numbers
CA
WH White
CA Carbon Black
RG Rose Gold
TG Titan Grey
Cover
Colours
S
SSmall
MMedium
LLarge
Size
LLLeft Hand
RRight Hand
Hand Type

00 | Page 12www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
CCOUP
Coupling Piece
CAXCOR
Coaxial Core
& CLAMRG-##
Lamination Ring
*These are located on the underside of the foam with the electrodes
**COVPS-1600 Shown
CEL-##
2x Electrodes
COVSWC
Wall Charger
Gain Adjuster
& CELCAB-###
Electrode
Cables*
Control Panel
Nexus Hand
COVPS-1600 - Prismatic**
COVPS-2600 - Cylindrical
2.0 What’s Inside
2.3 The Advantage Kit

00 | Page 13www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
2.0 What’s Inside
2.4 The Advantage Kit Part Numbers
Example Part Numbers: AK140E316
AK1 |40 | E |3 |16
Fixed Part Numbers
AK1 Product Code
Customisable Part Numbers
Note: The Advantage Kit is only sold with a Nexus Hand.
Note: CEL 60 designed for the following regions, use CEL 50 in all other regions.
United States, Brazil, Canada, Colombia, Mexico, West Japan, Saudi Arabia, South Korea, Guyana, Haiti, American Samoa, Anguilla,
Antigua and Barbuda, Aruba, Bahamas, Belize, Bermuda, British Virgin Islands, Cayman Islands, Costa Rica, Cuba, Dominican
Republic, Ecuador, El Salvador, French Polynesia, Guam, Guatemala, Honduras, Micronesia, Montserrat, Nicaragua, Palau, Panama,
Peru, Philippines, Puerto Rico, Saint Martin (French), Sint Maarten (Dutch), St. Kitts and Nevis, Suriname, Taiwan, Trinidad & Tobago,
U.S. Virgin Islands, Venezuela, Liberia, North Korea
3
X1000mm
6600mm
3300mm
1100mm
Cable
40
40 40mm
45 45mm
50 50mm
Wrist Size
EUCEL-60
ECEL-50
Electrode
Filter
16 16 COVPS-1600
26 COVPS-2600
Battery

00 | Page 14www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
3.0 Technical Information
Flexible Glove
EQD - Electric Quick Disconnect
Palm Grip Surface
E-Paper Screen
Rigid Covers
Dorsal Button
Wrist Lock Button
3.1 Nexus Glove Overview

00 | Page 15www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
3.0 Technical Information
Dimensions
Small Medium Large
Key Inches mm Inches mm Inches mm
Middle Fingertip to Hand Base A 6.61 165 7.25 184 7.7 5 196
Thumb Tip to Hand Base B 4.46 110 4.5 114.5 4.8 124
Max Chassis Width C 2.76 70 3 75 3.1 80
Diameter of Chassis at Wrist D 1.85 47 1.85 47 1.9 50
Palm Circumference G7.3 190 7.6 195 7. 8 200
Maximum Opening Width - Tripod Grip H 4.4 110 4.4 115 4.8 120
Thumb Swing Through Angle 81° 81° 81° 81° 81° 81°
Middle Fingertip to Flex Axis E 6.2 158 6.8 175 7.4 187
Thumb Tip to Flex Axis F 4 102 4.1 103.5 4.4 113
EQD Only X 0.98 3 0.98 3 0.98 3
Wrist
Flexion Axis
3.2 Nexus Hand Overview
C
G
A
B
E
H
F
D X

00 | Page 16www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
Maximum Hand Load Limit (A) with force applied upwards
90 kg / 198 lbs over the knuckles
Maximum Hand Load Limit (B) picking weight up
32 kg / 70.5 lbs
Avoid pressure on thumb
3.0 Technical Information
Nexus Hand Voltage 7 to 8.4V
Maximum Current Consumption 5A
Device Weight 0.57kg / 1.25 lbs
Maximum Hand Load Limit (A) 90kg / 198 lbs across knuckle
Maximum Finger Load Limit 16kg / 35 lbs
Full Open to Full Close 0.7 seconds to achieve grip
Tripod Grip 0.4 seconds to achieve grip
Tripod Grip Force 45N / 10 lbf
Power Grip Force 80N / 18 lbf
Key Grip Force 22N / 5 lbf

00 | Page 17www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
4.0 The Nexus Hand
Prosthetic devices are very personal, the hand especially as it is always on show. We tirelessly reviewed
current technology and always came back to the same conclusion: there is a big compromise between
looks and function when it comes to a hand cosmesis. High-definition cosmetic gloves look very lifelike, but
they are extremely expensive and limit hand dexterity. As the gloves get thinner, the function improves, but
the realism decreases, ultimately negating the purpose of a cosmetic glove. With the Nexus Hand we went
down a radical route to design something that users can customise in a way that speaks to their personality.
Something that is undeniably them.
We designed the Nexus Hand based on measured data collated from human hands to give it a more
anatomically proportionate and natural form with novel colours and materials to create a concept that users
will be proud to wear. We oer a black glove with four striking cover colours for them to choose from:
Rose GoldCarbon Black Grey TitanWhite

00 | Page 18www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
Maximum Temperature 104°F / 40°C
Minimum Temperature -4°F / -20°C
Humidity Maximum 80%, non-condensing
Pressure 101.3kPa / 14.7psi
The Nexus Hand is to be used exclusively for prosthetic fittings of upper limbs. Based on the environmental
conditions below, the user should not use, transport, or store the Nexus Hand outside of the boundaries
listed below.
5.0 Environmental Conditions

00 | Page 19www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
6.1 Abuse & Neglect
We designed the Nexus Hand to be robust, but it still cannot withstand intentional abuse. The Nexus Hand
cannot sustain excessive impacts or excessive water damage.
6.3 Harsh Chemicals/Abrasives
The Nexus Hand is made up of a variety of materials which may be vulnerable to damage by various chemicals,
such as solvents, acids, alkalis, corrosive substances, detergents, and similar chemicals.
Please avoid exposing the Nexus Hand to any harsh chemicals that may cause damage. If your patient chooses
to clean their Nexus Hand, please ensure they use mild soap and water. Abrasive cleaners and cleaning cloths
will scratch the cover.
6.2 IP44
The Nexus Hand has been tested and certified with IP44 rating, which classifies the degree of protection that
is provided against solids and water. The Nexus Hand is protected against solid objects over 1 mm in diameter
and is also protected against sprays or splashes from all directions.
The wrist interface is not IP44 water or dust resistant as it is highly dependent on the individual socket build.
The wrist area on the hand should be kept dry at all times.
6.0 Safety Guidelines

00 | Page 20www.covvi.com | Unit 4, Quayside Business Park, Leeds, LS10 1DJ | 020 3949 9500
6.0 Safety Guidelines
6.6 Sporting Activities
The Nexus Hand is not suitable to be worn whilst undertaking extreme sports. These include, but are not limited
to: base jumping, sky diving, downhill/enduro mountain biking, motocross, rock climbing, abseiling, bouldering
and powerlifting. Any sport that would involve the Nexus Hand getting wet must be avoided. These include,
but are not limited to: diving, swimming, snorkelling, surfing, kayaking and canoeing.
Avoid using the Nexus Hand for a sporting event to a competitive level. There is likely to be a specific terminal
device which would be better suited.
6.4 Operating a Vehicle
Although the Nexus Hand can be used for many day-to-day activities, please ensure your patient checks with
their local regulations regarding the operation of a motorised vehicle with their Nexus Hand.
Please ensure your patient has notified their insurance provider and consult with your patient before they decide
to operate a vehicle. If your patient should choose to operate a vehicle, we recommend that their prosthesis is
fully charged. In the event of an accident occurring while operating a vehicle with a Nexus Hand or any other
COVVI product; COVVI Ltd. shall not be liable under any circumstances.
6.5 Firearms
The Nexus Hand should not be used to operate a firearm.