Sentry ST-652 Operation Instructions Manual

Non-contact Infrared

Thermometer

Operation Instructions

Thank you for choosing our product. Before using this product, please read these Operation

Instructions carefully. They will provide you with guidance on how to use the product correctly and
how to examine it and solve common problems to best exploit its excellent performance. You will
find many advantages of this portable infrared thermometer, including its small size, admirable
endurance and user-friendliness. Just point it at the object and pull the trigger. Within less than a
second, you will be able to get the reading of the surface temperature of any object that is too hot,
too dangerous or too difficult to contact safely without the need of physical contact.

WARNING
Do not point the light beam of the instrument at or have it reflected into the eyes of
people or animals to avoid injury.
I. Performance

 Non-contact accurate temperature measuring
 Built-in laser aiming
 White backlight liquid crystal display
 Distance spot ratio 12:1 (see Figure 1)
 OC/OF optional
 MAX, MIN, AVG and storage functions
 Extensive usage, including food, security inspection, train, diesel engine and injection molding

applications

II. Technology Specification:

Resolution: 0.2OC or 0.5OF
Temperature range: -25OC~600OC(-13OF~1112OF)
Sample rate: about 0.5 seconds
Spectrum reaction: 6~14um
Emissivity: optional, 0.99, 0.95, 0.89, 0.85, 0.79 or 0.75
Power: one 9v battery

Figure 1

Accuracy: -25℃～-10℃): ±3℃

(-13℉～14℉): ±5℉
(-10℃～30℃): ±2℃
(-14℉～86℉): ±4℉
(30℃～560℃): 1%±1℃
(-86℉～1040℉): 2%±2℉

Operating environment: temperature: 0OC~50OC (32OF~122OF)
Relative humidity: 10~80%RH
Weight: about 195g (including battery)
Dimension: 180x48x96mm

III. Panel Description (see Figure 2)

A: infrared sensor
B: laser sight
C: liquid crystal display
D: backlight selection button
E: emissivity selection button
F: MAX, MIN and AVG selection button
G: Scan trigger
H: ℃/℉ switch button
I: laser selection switch

Ⅳ Display ( see Figure3)

1. Scan mode symbol

2. Low voltage symbol

3. Backlight symbol

4. Laser on symbol

5. Emissivity (6 options)

6. OC/OF symbol

7. Data storage symbol

8. MAX symbol

9. MIN symbol

10. AVG symbol

IV. How it works

Infrared thermometers measure the surface temperature of an object. An optical component
of the unit collects energy emitted, reflected and transmitted and focuses it onto a detector. Then an
electronic component translates the information into a temperature reading which is displayed on
the unit. The laser is used for aiming purpose only.

VI. Operating Instructions:

1. Install a 9v battery and pull the “Scan Trigger” to turn the power on. If the backlight is needed

but it's not on, press the “Backlight Button” (Button L) at the bottom right corner to turn on the

backlight. Press the button again to turn it off.