Sanwa mobiken Series User manual

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Light sensor element
Measurable wavelength
range
Directly-readable
wavelength
Display
“Over” display
Low battery indication
Sampling rate
Measuring ranges
Measuring accuracy
Functions
Power supply
Power consumption
Operating temperature
/humidity range
Storage temperature
/humidity range
Main body dimensions
& weight
Light sensor probe
Sensor cord length
Provided accessories
Si photodiode (Light sensor surface diameter Ø 9 mm)
400 nm to 1100 nm
633 nm (He-Ne laser)
Other wavelengths should be converted using typical
correction coefficient
Digital display: 3999 full scale
Bar graph display: 42-segment display
“4000” with “4” in the highest digit blinking
Blinking “BT” appears in the display when the built-in batteries
are nearly exhausted and battery supply voltage drops
Digital display: Approx. 2 times/sec.
Bar graph display: Approx. 20 times/sec.
40 µW range: 0.01 µW to 39.99 µW
400 µW range: 0.1 µW to 399.9 µW
4 mW range: 0.001 mW to 3.999 mW
40 mW range: 0.01 mW to 39.99 mW
±5% (in the 4 mW range, at the reference wavelength of
633 nm and 1 mW)
Temperature: 23°C ±2°C
MIN Hold function, MAX Hold function
Auto power save function (30 min. after operation)
SR-44 or LR-44, x 2
Approx. 6 mW
Temperature 0 to 40°C, humidity 80%RH or less (without
condensation)
Temperature -10 to +50°C, humidity 80%RH or less
(without condensation)
117(H) x 76(W) x 18(D) mm, approx. 120 grams
84(H) x 16(W) x 10(D) mm
Approx. 0.5 m when extended
Instruction manual x 1
To maintain accuracy, perform calibration and inspection at least once an year.
[7] Maintenance and Administration [9] Specifications
[8] After-Sale Servicing
The panel and case are little resistant to volatile solutions and heat. Do
not wipe the thermometer using lacquer thinner or alcohol and do not
place it heat a source of high temperatures (soldering iron, for example).
Do not store the instrument in a place subject to vibrations
or in a place which it may drop.
Do not store the instrument under direct sunlight or in a
place with low temperatures, high humidity or condensation.
Be sure to remove the batteries when the instrument is not
to be used for an extended period.
For information of repair, please contact the dealer, selling
agent or maker.
4. Storage
Remove the screw retaining the battery compartment
cover using a screwdriver.
Remove the battery compartment cover and take out the
exhausted batteries.
Insert new batteries without mistaking the + and – polarity.
Attach the battery compartment cover and clamp it with the screw.
3. Battery replacement
Replacement Procedure:
For calibration and inspection of the instrument, please
contact dealer, sole agent and maker.
2. Calibration
Instructions
1. Maintenance check
1) External finish
2) Light sensor
Check if the external finish is damaged by dropping the
instrument, etc.
Check if the light sensor surface is damaged.
Check if the light sensor cord is damaged.
If any of the above parts is damaged, do not use the instrument
but have it repaired.
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Design and specifications are subject to change for reasons of
improvement, etc.
Dempa Bldg, Sotokanda 2-Chome,Chiyoda-ku, Tokyo, Japan
TEL.: [phone] FAX.: [phone]
Web site: www.sanwa-meter.co.jp
e-mail: [email protected]

[4] Nomenclature
400
442
450
488
500
515
550
600
X 10.4
X 3.86
X 3.29
X 2.08
X 1.93
X 1.71
X 1.39
X 1.12
Wavelength (nm)
Correction
coefficient
Wavelength (nm)
Correction
coefficient
Wavelength (nm)
Correction
coefficient
850
900
940
950
1000
1050
1060
1100
X 0.69
X 0.68
X 0.72
X 0.74
X 0.96
X 2.25
X 2.70
X 5.40
633
650
670
700
750
780
800
830
X 1.00
X 0.95
X 0.90
X 0.84
X 0.77
X 0.73
X 0.72
X 0.70
Wavelength λ (nm)
Relative sensitivity
(%)
Spectral sensitivity characteristic (representing value)
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100
633
400
442
450
488
500
515
550
600
×10.4
×3.86
×3.29
×2.08
×1.93
×1.71
×1.39
×1.12
Wavelength(nm)
Correction
coefficient
Wavelength(nm)
Correction
coefficient
Wavelength(nm)
Correction
coefficient
850
900
940
950
1000
1050
1060
1100
×0.69
×0.68
×0.72
×0.74
×0.96
×2.25
×2.70
×5.40
633
650
670
700
750
780
800
830
×1.00
×0.95
×0.90
×0.84
×0.77
×0.73
×0.72
×0.70
Wavelength λ (nm)
Relative sensitivity
(%)
Spectral sensitivity characteristic (representing value)
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100
633
The meter uses 633nm of He-Ne laser reference wavelength.
Using the below conversion table of spectral sensitivity
characteristic (representing value), measurement of wavelengths
from 400nm to 1100nm can be made as rough readings.
Protective cover
Light sensor probe
storage position
Light sensor probeLight sensor window
Power/Range
switch
MIX/
MAX
Hold
button
Normal measurement
Push Push
Push
MIN Hold MAX Hold
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MIN Hold mode:
Holds the minimum value during measurement and
displays it in the digital display. Indicated by “DH” and
“MIN” shown in the display.
MAX Hold mode:
Holds the maximum value during measurement and
displays it in the digital display. Indicated by “DH” and
“MIN” shown in the display.
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The bar graph display is not held.
The MIN/MAX Hold mode is canceled when the
measurement range is changed.
The auto power save function of the instrument turns
it off in 30 minutes after an operation. To turn the
instrument on after it has been turned off by the auto
power save function, set the Range switch to OFF and
keep it in the OFF position for more than 1 second
before setting it to another position.
When over range, "4000" displays with "4" in the
highest digit blinking.
Laser should be received on the center of the sensor at
right angle.
With certain lasers, the laser power may vary due to
“return light” from the light sensor surface. In this case,
change the angle of the light sensor surface so that the
reflected light does not return directly to the laser light
outlet.
Measurement of weak laser power (below 1 mW) tends
to be affected by ambient light (disturbance). In this
case, it is required to take a countermeasure against
disturbance, by performing measurement in a dark room.
Notes)
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4.
Measurement Procedure
[6] Measurement
Using the MAX Hold function makes it possible display
always the maximum value measured. This solves the
problem in the meter reading, that varies depending on the
position, distance and angle of the incidence of laser beam
into the light sensor surface.
How to integrate the light sensor
probe with the main body for
measurement
Insert the light sensor probe in
the position on the top left of the
main body as shown in the
figure.
How to open or close the
protective cover
To open the protective cover,
push and hold the button on the
left side of main body into the
direction shown in the figure,
and open the protective cover.
To close the protective cover, first store the light sensor
probe in the storage position of the main body as described
below, and then close the protective cover until it is locked.
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[5] Functions
Notes)
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How to store the light sensor probe
The light sensor probe can be stored in the main body as
shown below.
Fit the light sensor probe
into the storage position so
that the light sensor surface
faces up.
Bend the cord and store it
in the space on the right of
the light sensor probe.
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2.
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Reading Correction coefficient Wavelength-converted value
2.44 (mW) x 0.73≒1.78 (mW)
Conversion readings (W) = reading (W) x correction coefficient
Conversion readings (W) = reading (W) x correction coefficient
Thank you for purchasing SANWA laser power meter LP1.
Read this manual carefully before use for safe use of the instrument.
Retain this manual together with the instrument for future reference.
[1] Operating Precautions
Do not stare directly at the laser light or allow its reflections
enter your eyes during measurement. Laser light incident to
your eyes may lead to degradation or loss of eyesight. Special
care is required for the IV light which is invisible for naked eyes.
An excessive optical input may damage the photodiode in
the light sensor. Do not apply light that is stronger than the
measurable range (40 mW).
Be careful not to damage the light sensor surface or stain it
by douching with a bare hand. Scratches or stain may
deteriorate the sensitivity of the instrument. If the light
sensor surface gets dirty, wipe lightly with ethyl alcohol.
This instrument incorporates the auto power save function, which
turns it off in 30 minutes after an operation. To turn the instrument
on after it has been turned off by the auto power save function, set
the Power/Range switch to OFF and keep it in the OFF position
for more than 1 second before setting it to another position.
Be sure to set the Power/Range switch to OFF after use.
Power/Range switch
This rotary switch is used to turn the illuminance meter on-
off and switch the measurement range to the 40 µW, 400
µW, 4 mW or 40 mW range.
Battery warning indicator
When the internal batteries are nearly exhausted and the
supply voltage drops, blinking “BT” appears in the display. If
this happens, please replace both batteries with new ones.
MIN/MAX Hold button (Also used as the protection cover lock)
Push this button during measurement to set the digital value
display to the MIN Hold or MAX Hold mode as shown below.
Pocket size.
Separate light sensor probe can be integrated with the main
body for measurement.
3999 full-scale count with a bar graph display.
Direct reading of the laser power of the reference
wavelength of 633 nm, while the laser power of other
wavelengths can be read by converting it according to the
spectral sensitivity characteristic table.
Wide measuring range from 0.01 µW to 39.99 mW.
MIN/MAX hold functions.
Auto power save function prevents wasting of battery power.
This instrument is a pocket-sized laser power meter featuring
excellent portability and operability.
It can be applied easily in check and maintenance of the
optical power levels of equipment using laser light.
Using 633 nm of a He-Ne laser as the reference wavelength,
this instrument enables direct reading of the optical power of
visible-range laser light from a visible laser pointer, DVD
player’s optical pickup, etc.
The power of other wavelength can also be measured by
converting the reading according to the spectral sensitivity
characteristic table (typical values).
[2] Applications
[3] Features
LCD display panel
Set the measuring range to the maximum range (40 mW).
Apply the laser beam to the light sensor surface.
After measuring the current power, set the measuring range
to the optimum range.
After completing measurement, set the Power/Range switch to OFF.
How to correct the wavelength sensitivity of the light sensor
The reference wavelength that can be read directly with this
instrument is 633 nm. To measure light with wavelengths
other than 633 nm, convert the reading using the sensitivity
correction coefficient obtained from the photodiode’s spectral
sensitivity characteristics (typical values).
Example)
When the measured laser light wavelength is 780 nm and the
power meter reading is 2.44 mW: