Sper scientific 840011 User manual

Pocket Laser
PowerMeter
840011
Instruction Manual
WARRANTY
Sper Scientic warrants this product against defects
in materials and workmanship for a period of ve
(5) years from the date of purchase, and agrees to
repair or replace any defective unit without charge.
If your model has since been discontinued, an
equivalent Sper Scientic product will be substituted
if available. This warranty does not cover probes,
batteries, battery leakage, or damage resulting
from accident, tampering, misuse, or abuse of the
product. Opening the meter to expose its electronics
will void the warranty.
To obtain warranty service, ship
the unit postage prepaid to:
SPER SCIENTIFIC LTD.
8281 E. Evans Rd., Suite 103
Scottsdale, AZ 85260
The defective unit must be accompanied by a
description of the problem and your return address.
INTRODUCTION
This tiny meter is less than ¾” thick,
weighing only 4 oz. (120 g) and is easily
carried in a shirt pocket.
The controls, display and sensor are all
neatly contained and protected within the
folding case with directions printed right
inside the cover.
This meter features a bar graph display,
auto power o󰀨, hold functions and indicates
low battery and over range.
SPECIFICATIONS CONSIDERATIONS
• Clean the sensor with a soft dry cloth.
• Turn the selector to OFF after use.
• To protect the sensor, store the unit with the cover closed.
• Do not expose the unit to excess direct sunlight, shock, vibration, humidity, or
extreme temperatures.
• Fluctuations in the reading may be due to shadows or changes in the line
voltage. Do not move the probe’s cord during measurement.
• Avoid Range Overload.
• Opening the case, except for replacing the batteries, will void the warranty
• Laser light can be harmful to the eyes and skin, avoid exposure to the beam and
do not look directly into the light source.
• Do not aim the light source at the eyes of other humans or animals.
• Do not aim the light source into a mirror or reective surface where the light
could be reected back into your eyes.

Insert the fresh batteries (match the
polarity) and replace the cover.
Remove the batteries when the
instrument will not be used for a
prolonged period.
Note...
This instrument uses 633 nm of a He-
Ne laser as the reference wavelength
To measure light wavelengths other
than 633 nm, convert the reading
using the sensitivity correction
coe󰀩cient obtained from the
photodiode’s spectral sensitivity
characteristics (typical values).
Min/Max (hold): Press the Case Lock
button to cycle through minimum hold (“DH”
and “MIN” is displayed), maximum hold
(“DH” and “MAX” is displayed), and normal
mode. Min/Max is cancelled when the range
is changed.
Automatic Shut O󰀨: The instrument has an
automatic shut o󰀨 function in order to prolong
battery life. After approximately 30 minutes
without activity, the meter will automatically
shut o󰀨. When this occurs, turn the range
selector to OFF for about 2 seconds before
selecting a measurement range.
Battery Replacement:
Replace the batteries
when “BT” appears in the
display. Remove the battery
compartment cover using
a screwdriver.
Measurement of weak laser power
(below 1 mW) tends to be a󰀨ected by
ambient light. In such cases, perform
the measurement in a darkened room.
The probe can be snapped
into a xed position during the
measurement, as shown.
After measuring the current
power, set the Power/Range
Selector to the optimum range.
Turn the selector to OFF when the
measurement is complete.
Store the probe so
the sensor faces up.
Take care not pinch
the probe’s wire in
the unit’s cover.
PANEL DESCRIPTION MEASUREMENT PROCEDURES
Open the cover by
pressing and holding
the Case Lock button.
Turn the selector to the
maximum (40 mW) measurement range.
If the measurement is over range, “4000”
displays and the “4” blinks.
Hold the probe’s sensor at a right angle
to the source to be measured. With
some lasers the power may vary due
to “return light” from the light sensor
surface. In such cases, change the
angle of the sensor so that the reect-
ed light does not return directly into the
laser light output.
Case
Lock
Button
Sensor Probe
Probe Storage
Protective
Cover
LCD
Power/Range
Selector
Example: When the measured laser light wavelength is
780 nm and the power meter reading is 2.44 mW:
Reading Correction coe󰀩cient wavelength converted
value 2.44 (mW) x 0.73 ═ 1.78 (mW)