Ash Technologies Prisma HD Portable Video Magnifier User Manual
- June 13, 2024
- Ash Technologies
Table of Contents
Prisma HD Portable Video Magnifier
User Manual
Prisma HD Portable Video Magnifier
User Manual
Package Contents
Your Prisma HD package contains:
- Prisma HD camera and table
- Power supply
- HDMI output cable
- Reading mat and operation manual
- Allen key for adjusting the hinge tension
Please retain the packaging in case there is a need to return the unit for service or repair.
Installation
Plug the power supply into a mains socket. Plug the power lead from the power
supply into the Prisma HD, at the rear near the base (see diagram).
Plug the HDMI cable into the Prisma HD and the other end into your
television.
Power on the Prisma HD by
pressingthe power button on the right of the control panel.
You should have an image on the TV. If not, use your TV’s remote control or
control panel to switch to the appropriate HDMI input used for the Prisma
HD
Raise the camera so that it is roughly 25 to 30 cms above the table. If it is
too far or too close to the text the camera will not be able to focus
correctly.
The light can be rotated as
shown. It should be adjusted so that it shines on an area centred about the
camera’s image.
Controls
Power
Push the button to turn the power on. A blue image will appear on your TV and,
after a few seconds, the picture from the camera will appear on the TV.
Pushing the Powerbutton again will power-off the Prisma HD.
Mode
Repeated pressing of the Mode button will cycle through the eight available
viewing modes:
- Photo mode – full colour for general viewing.
- Positive mode – high contrast black on white.
- Negative mode – white letters on a black background.
- Semi-colours – five high contrast false colour modes.
If the mode button is pressed while in any reading mode the unit will change
to photo mode. If the mode button is pressed again within 3 seconds the next
mode will be displayed.
However if the button is pressed after 3 seconds the unit will return back to
the original reading mode. This feature allows a quick view in photo mode. The
3 second timeout is indicated by a click sound.
Magnification
Press the Zoom-Up button to enlarge the image and ZoomDown to reduce the image
size. When reading you should generally choose the smallest size that you can
read comfortably. Note that holding the Zoom-Up button for a further two
seconds at maximum optical zoom will allow the unit to continue zooming
digitally. Digital zoom is indicated by an “xD” symbol in the top left corner
of the screen.
Overview
Overview allows you to easily locate a point of interest on the page you are
viewing. Press and release the Overview button to make the camera zoom out
fully and revert to fullcolour mode. A dot is displayed in the centre of the
screen as an aid to location. Place the point of interest under the dot and
press any key to restore the magnification to the previous level.
Focus
The camera will continuously autofocus to achieve the sharpest image.
However, please be aware that there is a limited range over which the camera
can focus. Raising the camera too high (greater than 30cms from the base of
the camera to the page) or placing the camera too low (less than 25cms from
the page) will mean the camera cannot focus at high magnification correctly.
If the image does not appear to be in focus, try raising or lowering the
camera to correct it.
Brightness
The image brightness can be adjusted to suit your preference. Press and hold
the Mode button for three seconds until the unit beeps. Use the Zoom Up and
Zoom Down buttons to adjust the image as desired. Press Mode again to save the
setting. The setting you choose will be saved and used subsequently for that
mode of operation.
Freeze
To freeze the image, press and hold the Overview button until the beep is
heard. The Mode button will operate as normal but pressing any other button
will unfreeze the image.
Using the Prisma HD
Reading with the Prisma HD
Place the Prisma HD on a suitable table near the televisionand sit in front of
it. Ideally the television should be at eye level or slightly below, and the
Prisma HD reading table should be level with your elbows when seated. A good
reading position prevents problems with your back, neck and arms.
Place the material you wish to read on the reading table, looking at the TV
screen to see where you are. Adjust the magnification to suit. Ensure the
camera head is horizontal for optimum image quality.
Move the book on the table until you locate the top of the page and then
locate the start of the text. Simply slide the book side to side and watch the
television screen while reading.
There is a mat provided with your Prisma HD to facilitate reading heavier
materials. Place the mat across the reading table with the rubber side
upwards. Place the book on themat and slide the mat from side to side. 
Writing with the Prisma HD
Remove the mat from the table. Place the page under the camera and locate the
area of the page where you wish to start writing (the overview function is
useful for this).
Holding the page firmly, bring your pen, raised well above the paper, until
the nib is visible on the screen at the point you wish to write. Lower the pen
to the paper carefully and write. You should watch the screen as you write.
Locating the Prisma HD camera in a well-lit area will enhance the image
available from the unit. If possible, avoid direct overhead lighting as this
can cause shadows on the page, leading to shading differences on the screen.
Focus lock
Press Mode and Overview simultaneously to turn off the autofocus facility.
Repeat to re-enable autofocus.
Lighting on/off
If you wish to turn off the LED lighting then, with the unit powered off,
press Zoom Up and power the unit on. Repeat to allow the lighting to function
again.
Sound on/off
The sounds can be disabled by pressing Zoom Down while powering on the unit.
Repeat to enable the sounds again.
Factory defaults
Press Mode while powering-on the Prisma HD to restore factory settings for
sound, lighting, brightness settings and video frame rate.
Troubleshooting
Changing TV Standard
Most HD televisions can display all the many different standards of HD
signals, however some cannot. If your television does not display the image
from the Prisma HD you should try the following: power-off the Prisma, press
and hold the Overview button and power on the unit. This will change the unit
from 50 Hz mode to 60 Hz and vice versa. You will hear a sequence of three
beeps confirming the frequency change.
Taking Care of your Prisma HD
Do not touch the lens. Dirt on the lens will appear as a blurred or dim image
or as fuzzy spots on the screen. If you believe the lens is dirty, it can be
cleaned with a soft, dry cloth applying minimal pressure. As the lens is
polished and coated, do not use a wet or coarse cloth, avoid detergents and
abrasive substances or solvents to clean it.
WARNING: Never look directly at the LED light source for any prolonged
period of time.
If the hinges loosen with use they can be tightened with the Allen key
provided. To do this, insert the Allen key into the screw head. Turn each
screw clockwise about a quarter turn. Do not overtighten.
Use only the supplied power supply and inspect the cabling regularly for
damage.
Specifications
Dimensions:| Table area: 24 x 41cm Folded height: 9cm
Raised height: 40cm
Weight: 1.1kg
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Power:| 12V 600mA from the power supply provided.
Modes of
Oseration:| High-contrast positive, high contrast negative, high
contrast semi colour and full colour normal.
Magnification:| Dependent on screen size and aspect
19″ 4:3 screen: 1.3x to 100x
32″ widescreen: 3x to 210x
Temperature:| Storage: -10°C to +60°C. Operating: +5°C to +40°C
Output| TMDS, DVI/HDMI
As we strive to constantly improve our products, this information is subject to change without notice.
Declaration of Conformity
We, Ash Technologies Ltd., declare under our sole responsibility that this
product Prisma HD, of the brand Ash Technologies to which this declaration
relates, is in conformity with the following standards or other normative
documents:
EN 60601-1-2:2007 Medical Electrical Equipment – Electromagnetic
Compatibility.
Classification: Residential
following the provisions of EMC directive 2004/108/EC.
Signed, for and on behalf of Ash Technologies Ltd,
**** Alan Johnston,
Naas, Ireland.
January 2011.
Warranty
Ash Technologies warrants the equipment, when purchased new, to be free from
defects in material and workmanship and will repair or replace at Ash
Technologies’ discretion, any equipment which exhibits such defects; provided
that the equipment has been operated under the proper conditions of
installation and has not been tampered with by any persons not authorised by
Ash Technologies or its agents and that it is solely serviced by Ash
Technologies or its agents.
In no event shall Ash Technologies or its agents be liable for special,
indirect, incidental or consequential damages; the original user’s remedies
being limited to repair or replacement. This warranty is valid only when
serviced in the country of original purchase.
Ash Technologies makes no other or further warranty, express or implied,
including and warranty of fitness for a specific purpose or warranty of
merchantability.
This warranty is valid for a period of 24 Months effective from the date of
delivery.
For warranty claims or service during or after warranty period please contact
your distributor.
Ash Technologies Limited, B5, M7 Business Park, Naas,
Ireland.
[email protected]
www.ashlowvision.ie
Prisma HD English Rev 1.00
Documents / Resources
| Ash
Technologies Prisma HD Portable Video
Magnifier
[pdf] User Manual
Prisma HD, Prisma HD Portable Video Magnifier, Portable Video Magnifier, Video
Magnifier, Magnifier
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