B&K Precision 636 - Manual - Manual (Page 2)

MEASUREMENT CONSIDERATIONS
1. Theory of Measurement
Every object emits infrared energy in accordance with its
temperature. By measuring the amount of this radiant
energy, it is possible to determine the temperature of the
emitting object.
2. About Infrared
Infrared radiation is a form of light (electromagnectic
radiation), and has the property that it passes easily
through air while it is easily absorbed by solid matter.
With an emission thermometer which operates by detect-
ing infrared radiation accurate measurement is possible,
irrespective of the air temperature or the measurement
distance.
3. Emission Thermometer Structure
Infrared radiation which has been emitted from the object
is focused upon an infrared radiation sensor, via an optical
system. This includes a lens which is transparent to
infrared radiation. And 5.3µm cut off filter. The output
signal from the infrared radiation sensor is input to an
electronic circuit along with the output signal from a
standard tempeature sensor (Thermopile).
4. Emissivity
All objects emit invisible infrared energy. The amount of
energy emitted is proportional to the object's temperature
and its ability to emit IR energy. This ability, called
emissivity, is based upon the material that the object is
OPERATION
1.Take the protective cap off and then pull the trigger to
turn on the meter.
2.Point the lens at the object whose temperature is to be
measured.
3.Pull the trigger. Measurement is performed as long as
trigger is kept.
4.Referring to the spot size figure ,aim the laser beam at
the object whose temperature is to be measured.
5.Put the cap on to extend life of the sensor and to avoid
danger caused by wrong way to use laser.
NOTE: Although the field of measurement (or Field of View)
and the spot almost coincide, actually the field of
measurement corresponds to the diameter for 90%
optical response. The object whose temperature is
to be measured needs to be larger than the mea-
surement diameter (spot of size) by an adequate
margin at least 1.5 to 2 times larger.
made of and its surface finish. Emissivity values range
from 0.10 for a very reflective object to 1.00 for a black
body. Factory set emissivity value of 0.95, which cover
90% of typical applications.
5. If the surface to the measured is covered by frost or other
material, clean it to expose the surface.
6. If the surface to be measured is highly reflective, apply
masking tape or matt finish black paint to the surface.
7. If the meter seems to be giving incorrect readings check
the front cone. There may be condensation or debris
obstructing the sensor; clean per instructions in the
maintenance section.
Please Attention
"
#
For your convenience, we suggest you contact your BK
PRECISION
distributor, who may be authorized to make
repairs or can refer you to the nearest service contractor.
If warranty cannot be obtained locally, please send the unit
to BK PRECISION Service Department, 22820 Savi
Ranch Parkway Yorba Linda, CA 92887, properly pack-
aged to avoid damage in shipment.
BK PRECISION Test Instruments only warrants prod-
ucts sold in the U.S.A. and its overseas territories. In other
countries each distributor warrants the BK PRECISION
products which it sells.
CUSTOMER SUPPORT
1-800-462-9832
Precision offers courteous, professional technical support
before and after the sale of their test instruments. The
following services are typical of those available from our
toll-free telephone number:
• Technical advice on the use of your instrument.
• Technical advice on special applications of your
instrument.
• Technical advice on selecting the best instrument for a
given task.
• Instrument for information on optional accessories for
your instrument.
• Information on instrument repair and recalibration
services.
• Replacement parts ordering.
• Information on other BK PRECISION instruments.
• Requests for a new BK PRECISION catalog.
• The name of your nearest BK PRECISION distributor.
Call toll-free 1-800-462-9832
Monday through Friday, 8:00 A.M. to 5:00 P.M.
Pacific Standard Time
22820 Savi Ranch Parkway Yorba Linda, CA 92887
© 2005 BK PRECISION
481-544-9-001 Printed in Taiwan
®
LIMITED ONE YEAR WARRANTY
BK PRECISION warrants to the original purchaser that
its product, and the component parts thereof, will be free
from defects in workmanship and materials for a period of
one year from the date of purchase.
BK PRECISION will, without charge, repair or replace,
at its option, defective product or component parts upon
delivery to an authorized BK PRECISION service con-
tractor or to the factory service department, accompanied by
proof of the purchase date in the form of a sales receipt.
Exclusions: This warranty does not apply in the event of
misuse or abuse of the product or as a result of unauthorized
alterations or repairs. It is void if the serial number is altered
, defaced or removed.
BK PRECISION shall not be liable for any consequential
damages, including without limitation damages resulting
from loss of use. Some states do not allow limitation of
incidental or consequential damages, so the above limitation
or exclusion may not apply to you.
This warranty gives you specific rights and you may have
other rights which vary from state-to-state.
MAINTENANCE
Battery Replacement
1. Power is supplied by a 9 volt "transistor" battery. (NEDA
1604, IEC 6F22).
2. Pull off battery cover " ".
3. Remove the battery cover by gently sliding it towards the
bottom of the meter.
4. Remove and disconnect the old battery from the meter and
replace with a new unit. Wind the excess lead length and
put the top of battery beneath the battery chamber. Install
the battery and put the battery cover.
Cleaning
Periodically wipe the case with a damp cloth and deter-
gent, do not use abrasives or solvents.
LASER RADIATION - DO NOT STARE INTO BEAM
POWER OUT: < 1mW
WAVE LENGTH: RED (630-670nm)
LASER SAFETY CLASSIFICATION OF CLASS 2
EN 60825-1:1994/A11:1996/A2:2001
AVOID EXPOSURE Laser radiation is emitted
from the APERTURE
CAUTION
(Table 1)
Asphalt 0.90 to 0.98 Cloth (black) 0.98
Concrete 0.94 Human skin 0.98
Cement 0.96 Lather 0.75 to 0.80
Sand 0.90 Charcoal (powder) 0.96
Earth 0.92 to 0.96 Lacquer 0.80 to 0.95
Water 0.92 to 0.96 Lacquer (matt) 0.97
Ice 0.96 to 0.98 Rubber (black) 0.94
Snow 0.83 Plastic 0.85 to 0.95
Glass 0.90 to 0.95 Timber 0.90
Ceramic 0.90 to 0.94 Paper 0.70 to 0.94
Marble 0.94 chromium oxides 0.81
Plaster 0.80 to 0.90 Copper oxides 0.78
Mortar 0.89 to 0.91 lron oxides 0.78 to 0.82
Brick (red) 0.93 to 0.96 Textiles 0.90
Substance Thermal Substance Thermal
emissivity emissivity