PASCO CI-6604 User Manual
Instruction Sheet
for the PASCO
Model CI-6504A
and CI-6604
HIGH SENSITIVITY LIGHT SENSOR
CI-6604
High Sensitivity
Light Sensor
012-06306D
LIGHT SENSOR AND
DIN connector
gain adjustment
GAIN
1
10
100
HIGH SENSITIVITY
LIGHT SENSOR
CI-6604
aperture for photodiode
GAIN
1
10
100
SENSOR
Introduction
The PASCO CI-6504A Light Sensor and CI-6604 High
Sensitivity Light Sensor are designed to be used with a
PASCO computer interface to make measurements of
relative light intensity.
Through the use of the gain options on the sensor box
and within Science W orkshop
working range of up to seven orders of magnitude,
allowing application across a wide range of lighting
levels.
The CI-6504A is best suited for experiments performed
at ambient light levels. At the lower end of the range,
interference patterns of monochromatic light after it
passes through single or multiple slits can be measured;
at the higher end, measurements can be made of relative
light intensities of daylight. The range switch settings
(1X, 10X, and 100X) on the top of the sensor roughly
corresponds to maximum input light levels of 500, 50,
and 5 lux.
®
, the Light Sensor has a
interface cable
CI-6504A
LIGHT
CI-6504A
Light Sensor
with 8-pin DIN
connectors
to computer
interface
The CI-6604 can be used where experiments are
performed at low light levels. Interference patterns of
monochromatic light, after it passes through single or
multiple slits, can be measured and spectral lines from a
spectrometer may be detected. The range switch settings
(1X, 10X, and 100X) on the top of the sensor roughly
corresponds to maximum input levels of 5, 0.5, and 0.05
lux. At the highest gain setting (100X on the sensor and
10X in Science Workshop) the High Sensitivity Light
Sensor has a resolution of about 10 micro lux.
The Light Sensor may be used with or without the fiber
optics probe (available separately as PASCO part no.
003-01383). Greater sensitivity is achieved by measuring
light directly, without the probe attached.
The sensing element of the CI-6504A and CI-6604 Light
Sensors is a stable and electrically quiet Si PIN
photodiode. The photodiode is responsive across a wide
spectrum ranging from 320 nm through 1100 nm. The
response curve for the photodiode is shown in Figure 1.
© 1997 PASCO scientific
Light Sensor and High Sensitivity Light Sensor
Interface
500
1
2
GAIN
=
1,10:ISOLATED
GAIN
=
1,10: REF TO GND
GAIN
=
1: REF TO GND
A
s
C
ON
ANALOG CHANNELS
B
n
DIGITAL CHANNELS
ScienceWorkshop
™
P
R
E
S
S
T
O
L
O
G
®
LIGHT
SENSOR
CI-6504A
10
1
100
GAIN
012-06306D
Spectral Response
0.7
0.6
0.5
0.4
0.3
0.2
RELATIVE SENSITIVITY
0.1
0
200
400
600
800
1000
WAVELENGTH (nm)
Figure 1. Spectral response curve of the photodiode
The Light Sensor can be plugged directly into any
PASCO computer interface box or can be connected to
the interface box using the supplied cable with DIN
connectors.
Equipment Included:
• Light Sensor
• 6-foot cable with 8-pin DIN connectors
Additional Equipment Required:
• Any PASCO computer interface
(300, 500, or 700 Science W orkshop
Macintosh or Windows or the 6500 series interface
for DOS)
®
series for
A
Plug into
any analog
channel.
B
ANALOG CHANNELS
™
ScienceWorkshop
®
s
n
A
C
500
Interface
E
S
R
S
1
P
T
G
O
O
L
DIGITAL CHANNELS
GAIN
1
10
100
CI-6504A
LIGHT
SENSOR
B
2
ON
=
GAIN
=
GAIN
1,10:ISOLATED
1,10: REF TO GND
1: REF TO GND
Plug into any
=
GAIN
analog
channel.
Figure 2. Connecting the Light Sensor and the computer
interface
➁ If the fiber optics probe (PASCO part no.
003-01383) is to be used, attach it by slipping the
connector of the fiber optics probe over the input
connector on the Light Sensor (Figure 3). A quarter
twist clockwise locks the probe to the Light Sensor.
(To disconnect, press the connector towards the
sensor box, turn it counterclockwise one-quarter
turn, and pull away from the box.)
GAIN
1
10
100
Rotate ring
one-quarter
turn to secure
CI-6504A
LIGHT
SENSOR
➤
Note: The manual has been written with the
assumption that the user has a basic familiarity with
Science Workshop and has access to the User’s
Guide for Science Workshop. Users can gain basic
skills with Science Workshop by working through
the tutorial within Science Workshop. Another
useful resource is the Quick Reference Card for
Science Workshop.
Setup Procedure
➀ Connect the Light Sensor and any analog channel of
the interface box with the interface cable (Figure 2A),
or
insert the DIN plug of the Light Sensor into the jack
of any analog channel of the interface box (Figure
2B).
Light sensor
probe connector
Figure 3. Attaching the fiber optics probe to the Light
Sensor
➂ Open the Experiment Setup window in
Science W orkshop. Click and drag the analog plug
icon to the analog channel icon that matches the
analog port you are using for the Light Sensor.
NOTE: Use care when handling the
fiber optics probe. The optical fibers
inside may be damaged if the cable is
bent sharply. Do not coil tighter than a 10 cm (4 in.)
diameter circle. Be sure not to damage the input end
of the probe; scratches may impair light
transmission.
2
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