Sentry ST653 Gun-Type Professional Infrared Thermometer Manual
Product Introduction
Thank you for purchasing this infrared thermometer. The Infrared Thermometer is a non-contact infrared temperature measuring instrument. To measure a temperature, point the unit at the object until the temperature is read, pull the measuring trigger and hold. Make sure the target area is larger than the unit’s spot size. For large target objects assure you are within target distance.
Features
- Adjustable emissivity from 0.1 to 1.00 in 0.01 steps.
- Ultra low power consumption in shutdown mode.
- Extended long time measuring reliability.
- Laser sighting On/Off is switchable.
- Backlit LCD display.
- C or F selectable.
- Electronic trigger lock.
- Temperature data storage.
- Audible alarms
Applications
- Electrical troubleshooting.
- Automotive repair and maintenance.
- Air conditioner.
- Science experiment.
- Manufacturing processes of semiconductor technology.
- Test terminals on circuits.
- Food safety and processing.
- Perform HVAC energy audits.
Safety Information
Read the following safety information carefully before attempting to operate or service the meter. Only qualified personnel should perform repairs or servicing not covered in this manual.
Laser Warning Note!
Do not point laser directly at eye. Use caution a round reflective surfaces. Keep out of reach of children.
Cautions!
- DO NOT submerge the unit in water.
- This product is not designed for use in medical evaluations. The product can only be used to measure body temperature simply for reference. They are meant for industrial and scientific purposes.
Safety symbols
Dangerous, refer to this manual before using the meter.
CE Certification.
This instrument conforms to the following standards:
EN61326:Electrical equipment for measurement, control and laboratory use.
IEC61000-4-2:Electrostatic discharge immunity test.
IEC61000-4-3: Radiated, radio-frequency, electromagnetic field immunity test.
IEC61000-4-8: Power frequency magnetic field immunity test.
Tests were conducted using a frequency range of 80- 1000MHz with the instrument in three orientations. The o o average error for the three orientations is 0.5 C ( 1.0 F) at 3V/m throughout the spectrum. However, between 781- 1000MHz at 3V/m, the instrument may not meet its stated accuracy.
Specifications
Operation of Instrument
Quick Start
To measure a temperature, point the unit at the target you want to measure, pull the trigger and hold. In SCAN mode, the LCD displays the current temperature in Celsius or Fahrenheit. The unit will HOLD the last reading for about 6 seconds after the trigger is released; the word HOLD appears. Be sure to consider the target area inside the angle of vision of this instrument. The laser is used for aiming only. For small targets at short distances the aim should be adjusted respectively.
Unit Diagram
LCD Display
C/ F and Battery Change
The unit is powered by 9V battery and displays temperatures in either C or F. The user has to replace the battery when the battery voltage drops below the voltage for reliable operation and at the same time the low battery symbol will appear. To change the 9V battery, pull open the unit’s handle under the trigger. After replacing the battery push back and snap in place.
Advance Function
To configure advance functions, simply use the “F” button to set parameters. The sequential operations and the corresponding explanations are shown in the following flow-chart.
Techniques Of Infrared Thermometer
Field of view(FOV) ratio =Distance to diameter (DS) ratio
The field of view is the angle of vision at which the instrument operates, and is determined by the optics of the unit. The FOV is the ratio of the distance from the target to the target diameter. The smaller the target, the closer you should be to it. When the target diameter is small, it is important to bring the thermometer closer to the target to insure that only the target is measured.
Emissivity
Emissivity is the ability of an object to emit or absorb energy. Perfect emitters have an emissivity of 1, emitting 100% of incident energy. An object with an emissivity of 0.8 will absorb 80% and reflect 20% of the incident energy. Emissivity is defined as ratio of the energy radiated by an object at given temperature to the energy emitted by a perfect radiator at the same temperature. All values of emissivity fall between 0.1 and 1.0. (PS. Please refer to the chart next page.)
Non-contact temperature sensors measure IR energy emitted by the target, have fast response, and are commonly used to measure moving and intermittent targets, targets in a vacuum, and targets that inaccessible due to hostile environments, geometry limitations, or safety hazard. The cost is relatively high, although in some cases is comparable to contact devices.
Maintenance
Cleaning the lens: Blow off loose particles using clean compressed air. Gently brush remaining debris away with a camels hair brush. Carefully wipe the surface with a moist cotton swab. The swab may be moistened with water.
NOTE: DO NOT use solvents to clean the lens.
Cleaning the housing: Use soap and water on a damp sponge or soft cloth.
REFRENCE LINK
