Functional Description - Abbott NycoCard READER II Manual De Instrucciones

NycoCard READER II
™
For professional near-patient testing and laboratory use.
Intended use of NycoCard
The NycoCard Reader II is a small battery-powered
™
reflectometer, designed to measure the coloured surfaces on
the NycoCard Tests and calculate the concentration values.
The coloured responses are measured by spectral reflectance
in three parts of the visible spectrum.
The NycoCard Reader II is calibrated by the
manufacturer for the NycoCard Tests. Accurate results
can only be assured when the NycoCard Reader II is
used with the NycoCard Tests.
Contents of NycoCard
The NycoCard Reader II Kit consists of:
NycoCard Reader II
Battery charger
Batteries (rechargeable)
A1
Calibration devices
A2
Pen tips
A3
Pen rings
Pad
Instruction manual
When unpacking, examine the contents of the package for any
sign of shipping damage and check if the package is complete.
Report the missing items or shipping damage to your supplier.

Functional description

The NycoCard Reader II consists of the instrument box
(1), which is the operational and calculating unit, and the
Reader pen (5), which is the measurement unit. The main
components of the instrument box are the microprocessor,
the LCD display (3) and the push buttons (2) for operation.
The key elements of the Reader pen are the Light Emitting
Diodes (LEDs) (11), a photodiode (12) and a light/dark
detector (10). A pen cable (4) connects the box and pen
together. The penholder (8) is located to the right of the
display on the instrument box. In front of this holder, there
is a lid (6), and on the rear side of the lid a white calibration
device (9) is placed.
Do not interchange Reader pens between different
•
instruments. The specific calibration data is stored in
the box.
The pen should be placed in the penholder when not in
•
use. This protects the optics from dust and damages.
READER II
™
READER II
™
1 unit
1 unit
3 units
10 units
10 units
10 units
1 unit
1 unit
NycoCard READER II User Manual
Basic theory
The Reader pen contains three pairs of LEDs: red, green
and blue. Reflected light from the test sample is measured,
relative to a white sample, by a light-sensitive photodiode
circuit. When a specific test from the NycoCard Reader II
Test Menu is chosen, the required LEDs illuminate the sample
to be measured. The sample will reflect some of the light,
which will be detected by the photodiode.
When the pen is placed over the sample and the pen sleeve
is pushed down, the light/dark detector registers that
the environment has changed from light to dark and the
measurement is automatically started. The sleeve will ensure
that the pen is held stable in a vertical position, and that
external light is excluded from the sample.
Adjusting
This procedure compensates for the contribution of reflected
light from the inside of the pen tip (14) and slight electrical
current leakage in the electronic circuit. Adjusting is
performed when the pen is placed in the penholder, i.e. in a
dark chamber without any sample present.
It is important to adjust the instrument each time
•
the instrument is turned on and when the pen tip is
replaced.
White calibration
The White calibration is essential in reflectance
measurements and adjusts for any differences in measuring
conditions and variation of pen tips. The white calibration
is performed on a special calibration device, which is stored
under the lid, protected from light and dust.
The White calibration should be performed prior to
•
each single, sporadic measurement and prior to each
series of measurements (max 20 measurements per
series).
Installation and environment
Recommended ambient temperature is 18 – 25°C and
humidity must not be condensing. Ensure that the instrument
is protected from dirt and direct sunlight.
Placement of the NycoCard Reader II should allow
•
easy disconnection from mains A/C power at any
time.
• Make sure that the instrument is acclimatised to room
temperature before use.
Water or any other liquid should not be in contact
•
with the instrument.
Please check the surroundings environment with
•
respect to strong electromagnetic radiation. It might
interfere with proper operation.
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