Omega OS643W User manual
OMEGA
OS643W
Infrared Thermometer
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1
INTRODUCTION
This instrument is a portable easy use 3½ digit, compact-sized digital
thermometer designed to use infrared or K-type thermocouple as input. Meter
with Backlit LCD, Auto-hold function and auto power off (15 seconds approx.)
feature after releasing MEAS button to extend battery life and with analog signal
outputfunction.TemperatureindicationfollowsReferenceTemperature/Voltage
Tables N.I.S.T. Monograph 175 Revised to ITS-90 for K-type thermocouple.
SAFETY INFORMATION
It is recommended that you read the safety and operation instructions before
using the thermometer.
WARNING
To avoid electrical shock, do not use this instrument when voltages
at the measurement surface exceed 24V AC or DC.
2
WARNING
To avoid damage or burns, do not make temperature measurement
in microwave ovens.
The symbol on the instrument indicates that the operator must refer to an
explanation in this manual.
3
CAUTION
• Do not use the unit near any device which generates strong electromag-
neticradiationornearastaticelectricalcharge,asthesemaycauseerrors.
• Do not point the lens at the sun or at any other source of strong light. If you
do, the sensor may be damaged.
• Do not contact the lens against the object whose temperature is to be
measured, or get it dirty, allow it to be scratched, or allow any foreign
material to adhere to it. Doing so may cause errors.
• Donottouchorholdbythefrontcone.Temperaturereadingcanbeaffected
by heat from hand.
• Donotplacethemeteronoraroundhotobjects(70°C/158°F).Itmaycause
damage to the case.
• If the meter is exposed to significant changes in ambient temperature (hot
tocoldorcoldtohot).Allow20minutesfortemperaturestabilization,before
taking measurement.
• Condensation may form on the lens when going from a cold to hot
environment-wait 10 minutes for conden sation to dissipate befor taking
measurements.
• This unit is not constructed to be water proof or dustproof, so do not use it
in a very dusty environment or in one where it will get wet.
4
SPECIFICATIONS
GENERAL
Display: 3½ digit liquid crystal display (LCD) with maximum reading of 1999.
Overrange: (OL) or (-OL) is displayed.
Low battery indication: the " " is displayed when the battery voltage drops
below the operating level.
Measurement rate: 2.5 times per second, nominal.
Operating Environment: 32°F to 122°F (0°C to 50°C) at < 70% relative
humidity.
StorageTemperature:40°Fto140°F(-20°Cto60°C),0to80%R.H.withbattery
removed from meter.
Auto power off: 15 seconds approx.
Standby consume current: <1µA.
Battery: 4 pcs 1.5V (AAA size).
Battery Life: 100 hours (continuity) typical (Back-Light not illuminated).
Dimensions: 170mm(H) x 44mm(W) x 40mm(D).
Weight: 160g including batteries.
5
Infrared Radiation ELECTRICAL
Temperature Range: 0°F to 500°F, -20°C to 260°C.
Display Resolution: 1°F / 1°C.
Accuracy: ±3% of reading or ±6°F/3°C, whichever is greater @ 64.4 to 82.4°F
(@ 18 to 28°C) ambient operating temperature.
Temperature Coefficient: ±0.2% of reading or ±0.36°F/0.2°C, whichever is
greater, change in accuracy per °F/°C change in ambient operating tempera-
ture above 82.4°F/28°C or below 64.4°F/18°C.
Response Time: 1 second.
Spectral Response: 6 to 14µm nominal.
Emissivity: Pre-set 0.95.
Analog Output: 1mV/°F(°C).
Detection Element: Thermopile.
Optical Lens: Fresnal Lens.
Field of View: 65mmØ at 1000mm.
6
Spot size increases with distance from the probe tip as shown
7
K-type thermocouple ELECTRICAL
Temperature Range: -58°F to 1999°F, -50°C to 1300°C.
Display Resolution: 1°F / 1°C.
Accuracy: Accuracy is specified for operating temperatures over the range of
64°F to 83°F (18°C to 28°C), for 1 year, not including thermocouple error.
±(0.3% rdg + 2°F) -58°F to 1999°F
±(0.3% rdg + 1°C) -50°C to 1000°C
±(0.5% rdg + 1°C) 1000°C to 1300°C
Temperature Coefficient: 0.1 times the applicable accuracy specification per
°C from 32°F to 64°F and 83°F to 122°F (0°C to 18°C and 28°C to 50°C).
Input Protection: 24V dc or 24V ac rms maximum input voltage on any
combination of input pins.
Input Connector: Accepts standard miniature thermocouple connectors (flat
blades spaced 7.9mm, center to center).
Analog Output: 1mV/°F(°C).
8
OPERATING INSTRUCTIONS
MEAS (MEASURE) Button
DepressMEASbuttontoturnonthemeterformeasuringtemperature.Releasing
MEAS button to stop measuring temperature and automatically hold the display
reading, the meter turns off automatically after 15 seconds.
This manual suits for next models
1
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