SANTRY OPTRONICS CORP
Gun-Type Professional
Infrared Thermometer
MODEL: ST 653
Instruction 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 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 801000MHz with the instrument in three orientations. The average error for the three orientations is 0.5 C ( 1.0 F) at 3V/m throughout the spectrum. However, between 7811000MHz at 3V/m, the instrument may not meet its stated accuracy.
Specifications
| Distance/Spot Ratio | 12:1 |
| Temperature Range | -32~535 °C(-25~999 °F) |
| Accuracy (Assumes Operation Ambient Temperature of 25 °C/77 °F) | ± 3°C( ±5°F) From -32~-20 °C(-25~-4 °F) ± 2°C( ±3°F) From -20~100° C(-4~212 °F) ± 2% From 100~535 °C(212~999°F) |
| Spectral Response | 5~14 μ m |
| Repeatability | ± 1°C ( ±2 °F) |
| Resolution | 0.1° C (0.1 °F) |
| Response Time | 500 ms. |
| Operation Temp. | 0~50 °C(32~122 °F),10~90%RH |
| Auto Power Off | Automatically after approx. 6s. |
| Emissivity | Adj. 0.1~1.0 |
| °C/°F Switchable | YES |
| Backlight | YES |
| Laser Sight Switchable | YES |
Max/Min/Avg./  T | YES |
| Auto-measuring | YES |
| 10 point memory | YES |
| Audio Alarm | YES |
| Battery Type | 9V(006P, IEC6F22, NEDA1604) |
| Battery Life | 16 hrs. |
| Dimensions | 170x133x45mm (6.69″x5.23″x1.77″) |
| Weight | 187g Approx. |
| Accessory | 9V Battery, Instruction manual, Carrying case. |
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 advanced functions, simply use the “F” button to set parameters. The sequential operations and the corresponding explanations are shown in the following flowchart.
- Scan and display the temperature during the measurement.
- Continuously measure and display the temperature without pulling the trigger.
- Activate the data record function when pull the trigger and recall the stored data by using
or 
button.
(Note: While triggering to record, the new data will replace the existing data on the next storage space!) - The maximum temperature during one measurement.
- The minimum temperature during one measurement.
- The average temperature during one measurement.
- The temperature differential during one measurement.
- Adjustable emissivity for better accuracy on all surfaces.
- Highest alarm temperature setting.
- Lowest alarm temperature setting.
( *The parameters are adjusted by using or 
buttons.)
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 ensure 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 the ratio of the energy radiated by an object at a 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 are inaccessible due to hostile environments, geometry limitations, or safety hazards. 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.
| Material | Temp °C/°F | Emissivity |
| Gold(pure highly polished) | 227/440 | 0.02 |
| Aluminum foil | 27/81 | 0.04 |
| Aluminum disc | 27/81 | 0.18 |
| Aluminum household(flat) | 23/73 | 0.01 |
| Aluminum (polisned prate 98.3%) | 227/400 | 0.04 |
| 577/1070 | 0.06 | |
| Aluminum(rough plate) | 26/78 | 0.06 |
| Aluminum(oxidized @599°C) | 199/390 | 0.11 |
| 599/1110 | 0.19 | |
| Aluminum surfaced roofing | 38/100 | 0.22 |
| Tin(bright tinned iron sheet) | 25/77 | 0.04 |
| Nickel wire | 187/368 | 0.1 |
| Lead(pure 99.95-unoxidized) | 127/260 | 0.06 |
| Copper | 199/390 | 0.18 |
| 599/1110 | 0.19 | |
| Steel | 199/390 | 0.52 |
| 599/1110 | 0.57 | |
| Zinc galvanized sheet iron(bright) | 28/82 | 0.23 |
| Brass(highly polished): | 247/476 | 0.03 |
| Brass(hard rolled-polished w/lines): | 21/70 | 0.04 |
| Iron galvanized(bright) | – | 0.13 |
| Iron plate(completely) | 20/68 | 0.69 |
| Rolled sheet steel | 21/71 | 0.66 |
| Oxidized iron | 100/212 | 0.74 |
| Wrought iron | 21/70 | 0.94 |
| Molten iron | 1299-1399/3270-2550 | 0.29 |
| Copper(polished) | 21-117/70-242 | 0.02 |
| Copper(scraped shiny not mirrored) | 22/72 | 0.07 |
| Copper(Plate heavily oxidized) | 25/77 | 0.78 |
| Enamel(white fused on iron) | 19/66 | 0.9 |
| Formica | 27/81 | 0.94 |
| Frozen soil | – | 0.93 |
| Brick(red-rough) | 21/70 | 0.93 |
| Brick(silica-unglazed rough) | 1000/1832 | 0.8 |
| Carbon(T-carbon 0.9% ash) | 127/260 | 0.81 |
| Concrete | – | 0.94 |
| Glass(smooth) | 22/72 | 0.94 |
| Granite(polished) | 21/70 | 0.85 |
| Ice | 0/32 | 0.97 |
| Marble(light gray polished) | 22/72 | 0.93 |
| Asbestos board | 23/74 | 0.96 |
| Asbestos paper | 38/100 | 0.93 |
| 371/700 | 0.95 | |
| Asphalt(paving) | 4/39 | 0.97 |
In support of our policy of continuous product improvement, we reserve the right to change materials and specifications without notice. Drawings, where used, are not to scale. All dimensions are in millimetres and the sizes given are approximate. Where possible, technical MSDS data sheets are made available on the website. All products should be installed and used in accordance with the manufacturer’s instructions provided. Warning: products may be the subject of registered designs and patents. Refer to the website for terms and conditions on warranty.
T: 1800 303 424
E: [email protected]
W: www.pcwi.com.au
