Sentry ST-677 Instruction Manual

Infrared Thermometer

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ST-677ST-677

HDS Infrared Thermometer

Instruction Manual

Instruction

Manual

Version-01 07/MAY.

1.Product Introduction

1-2 Applications

2.Safety Information

2-2 Safety symbols

3.Specifications

4.Operation Instructions

Unit Diagram

Function

5.Techniques of Infrared Thermometer

6.Maintenance

1-1 Features

2-1 Cautions

4-1 Quick Start

4-2

4-3 Operation

4-4 °C/°F,Laser Switch and Battery Change

5-1 Field of view(FOV) ratio

5-2 Emissivity

Table Content

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1. 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.

1-1 Features

Features with board temperature and high DS ratio.

These allow user to monitor the target temperature for a

long distance, far away from the potential risk.

H

igh DS ratio.

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.

1-2 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.

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2. Safety Information

Laser Warning Note!

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.

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 80-1000
M Hz with the instrument in three orientations.The average

o o

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.

Dangerous, refer to this manual before using the meter.

CE Certification.

D o n o t p o i n t l a s e r d i r e c t l y a t e y e .
U s e c a u t i o n a r o u n d r e f l e c t i v e s u r f a c e s .
K e e p o u t o f r e a c h o f c h i l d r e n .

The device may not be disposed of with the trash.It
promotes the re-use recycling and other forms of
recovery of used materials and components, and to
improve the environmental performance of all
operators ( manu facturers, traders and treatment
facilities) involved in the life cycle of products.
Dispose of the product appropriately in accordance
with the regulations in force in your country.

2-1 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.

2-2 Safety symbols

This instrument conforms to the following standards:

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3. Specifications

Temperature Range -32~1650℃ (-25.6~3002ºF)

Accuracy

±3.0ºC(±5ºF) from -32~-20ºC(-25.6~-4ºF)

±2.0ºC(±3ºF) from -20~100ºC(-4~212 ºF),

±2% from 100~1650ºC(212~3002ºF)

Th er mo p il e 8 ~1 4μm

Re pe a t a bi li ty ± 1º C ( ± 2º F)

Re so l u t io n

Re sp o n s e Ti me 500 ms

Em is si v it y Ad ju st ab le 0 .1 ~ 1. 0

Di st an c e/ Sp ot R at io 50 : 1

Su pp l y Vo lt ag e 9 V

at i a l r

m c l pp

Au to P ow er O ff A ut a f t a rox 6s

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Op er at i ng Tem p. 0~ 5 0℃(3 2~ 12 2℉), 10 ~9 0% R H

°C / °F S w i tc ha bl e

YE S

Ba ck li g ht YE S

Laser S igh t S witchabl e YES

Ma x/ Mi n /Av g/ΔT YE S

10 P oi nt M em or y Y ES

Au di o Al a rm Y E S

Au to M ea su ri ng Y ES

Du al D is pl ay YE S

Tri po d Mo un t Y ES

Di me n s i on s 2 00 x1 6 6x 51 mm

We ig ht 2 8 0 g Ap pr ox .

0.1°C or 0.1°F (Above 2000°F:1°F)

Measuring Window

4. Operations of Instrument

4.1 Quick Start

To measure a temperature , point the unit at the target,

pull the trigger and hold. Be sure to consider the

target area inside the angle of vision of this instrument.

The single spot of laser is used for aiming only.

4-2 Unit diagram

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Measuring Trigger

Display Screen

Laser Sighting

Battery and Cover

Control Panel

LCD & Control panel

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SCAN / HOLD / AUTO

°C / °F Indication

Main Temperature Display

Max / Min / Avg

Set / Record Value

Lock Key

Mode Key

Up Button

Laser / Buzzer On / Off

Low Battery

Data Log

ΔT / Emissivity

High / Low Alarm

Memory Key

Down Button

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4.3 Operation Functions

To operate more advance functions, it is simply by using

MODE button to change. The sequential operations and

the corresponding explanations are shown in the following

flow-chart.

Operation Mode

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Mode

SCAN

MIN

AVG

T

HAL

LAL

Par ameter Setup mode

●Scan and di splay the temperature
during measurement.

●The maximum temperature within
one shot measuring..

●The minimum temperature within
one shot measuring.

●The average temperature within
one shot measuring.

●The highe st and lowest temperatur e
differenc e within one shot mea suring

●Recall th e stored data by using

or button.

● Emissivity for more accuracy

on differen t materials.

●Highest a larm temperature setti ng.

●Lowest al arm temperature settin g.

(* The parame ters are adjusted b y
using or buttons .)

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DATA

MAX

Remarks

a. Memory: Activate the record function by push the M button.

To delete all the records, press up or down button to DATA0

and press “M” button.

b. LOCK: Push the button to continuously measure and

display the temperature without pull the measuring trigger.

c. The above functions can be activated always in any step of

operations mode in flow-chart.

d. In SCAN mode, the LCD displays both the current tempera-

ture in Celsius or Fahrenheit. The unit will HOLD the last

reading for 30 seconds after the trigger is released. When

the battery is low, the battery icon is display, but the unit will

continue to function.

e. While DATA# flashes on the left bottom, the value on the

main Temperature Display can be recorded in “#” log. Simply

press “M” button.

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4.4 °C/°F, Laser Switch and

Battery Change

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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.

° °

°C / °F

Switch

Laser on/off

9V Battery

Battery cover
release button

5. Techniques of Infrared
rmometer

The

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5.1 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

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closer you should be to it . When the target dia et r s

small, it is important to bring the thermome ter closer to the

t

targe to insur t hat on y the target i s measured,e xcluding

l

e

the surroundings.

5.2 Emissivity

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6. Maintenance

Cleaning the lens: Blow off loose particles using clean

compressed air. Gently brush remaining debris away

with a camel's 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.

Non-contact temperature sensors measure IR energy emitted
by the target, have fast response, and are commonly use 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.

Emissivity is the ability of an object to emit or absorb
energy. Perfect emitters have an emi ssi vi ty of 1 ,
emitting 100% of incident energy. An object with an

emissivity of 0.8 will absorb 80% and reflect 20% of

ra

the incident energy. Emissivi y is defined as t he tio

t
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 0.0 and 1.0.

Emissivity Table

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

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

Aluminum (polisned prate 98.3%) 227/400

0.04

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ST 677 Version-01 07/MAY.

3F, No.122, Sec.1, Sanmin Road,

Ban-Ciao, Taipei 220, Taiwan, R.O.C.
TEL:[phone]
FAX:[phone]
http://www.sentrytek.com.tw

PA05-0000677-01