TFA Dostmann ST485 Operating Manual

Non-Contact Infrared Thermometers

ST485
Operating Manual

3p

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TABLE OF CONTENTS

INTRODUCTION………………………………………3
FEATURES……………………………………………3
WIDERANGEAPPLICATION ………………………… 4
SAFETY……………………………………………… 4
DISTANCE&SPOTSIZE……………………………… 5
SPECIFICATIONS…………………………………… 6
FRONTPANELDESCRIPTION……………………… 8
INDICATOR……………………………………………8
BUTTONS………………………………………………9
MEASURMENTOPERATION………………………… 12
BATTERYREPLACEMENT…………………………… 13
NOTES……………………………………………… 13
MAINTENANCE …………………………………… 17

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INTRODUCTION

Thank you for purchase of the IR Thermometer. This is
capable of non-contact (infrared) temperature
measurements at the touch of a button. The built-in laser
pointer increases target accuracy while the backlight LCD
and handy push-buttons combine for convenient, ergonomic
operation.
The Non-contact Infrared Thermometers can be used to

measure the temperature of objects’ surface that is improper

to be measured by traditional (contact) thermometer (such
as moving object, the surface with electricity current or the
objects which are uneasy to be touched.)
Proper use and care of this meter will provide years of
reliable service.

FEATURES:

 Rapid detection function
 Precise non-contact measurements
 Dual laser sighting
 Unique flat surface, modern housing design
 Automatic Data Hold
 ℃/℉ switch

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 Emissivity Digitally adjustable from 0.10 to 1.0
 MAX temperature displays
 Backlight LCD display
 Automatic selection range and Display Resolution 0.1º

C(0.1ºF)

 Trigger lock
 Set high and low alarms

WIDE RANGE APPLICATION:

Food preparation, Safety and Fire inspectors, Plastic
molding, Asphalt, Marine and Screen printing, measure ink
and Dryer temperature, HVAC/R, Diesel and Fleet
maintenance.

SAFETY

 Use extreme caution when the laser beam is turned on.
 Do not let the beam enter your eye, another person’s

eye or the eye of an animal.

 Be careful no to let the beam on a reflective surface

strike your eye.

 Do not allow the laser light beam impinge on any gas

which can explode.

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Distance & Spot Size

As the distance (D) from the object increases, the spot size
(S) of the area measured by the unit becomes larger. The
relationship between distance and spot size for each unit is

listed below. The focal point for each unit is 914mm (36”).

The spot sizes indicate 90% encircled energy.

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ST485

D:S= 20:1

D

S

20in.

2.0in @

10in.

1.0in @

50.8mm @

508mm

254mm

25.4mm @

1. SPECIFICATIONS

MODEL Temperature range D: S

ST485 -50 to 800 oC(-58℉ ~ 1472℉) 20:1
Display resolution 0.1 oC(0.1℉) <1000

1℉ >1000
Accuracy for targets:

Assumes ambient operating temperature of 23 to 25 oC (73
to 77℉)

-50 … -20℃(-58 t…-4℉): ±5℃(±9℉)

-20 … 538℃ (-4 … 1000℉): ± 2.0% or +2℃(±3.6℉);
538 … 800℃(1000 … 1472℉): ± 3.5% or ± 5℃(±9℉)

Repeatability