General IRT855DL User Manual

50:1 ULTRA WIDE-RANGE

DATA LOGGING IR THERMOMETER

WITH “K” PORT

USER’S MANUAL

IRT855DL

Please read this manual carefully and thoroughly before using this product.

TABLE OF CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 –3

Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

What’s in the Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Product Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 –5

Setup Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 10

Making Basic Temperature Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Using the “K” Type Temperature Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 –7

Accounting for Emissivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 –8

Setting and Arming Temperature Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Storing & Recalling Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 –9

Measurement Lock Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Data Logging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 – 10

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 – 11

Operating & Maintenance Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Warranty Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 – 12

Return for Repair Policy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

INTRODUCTION

Thank you for purchasing General Tools & Instruments’ IRT855DL 50:1 Ultra Wide-Range Data
Logging IR Thermometer with “K” Port. Please read this user’s manual carefully and thoroughly
before using the instrument.

The IRT855DL measures surface temperature using either of two methods: non-contact (using
an IR thermometer with a laser pointer) or contact (using a “K” type thermocouple). A “K” type
bead thermocouple with a measurement range of -40° to 500°F (-40° to 260°C) is included in
the package. Non-contact measurements made by the IRT can be adjusted for the emissivity
of the surface, increasing the accuracy of readings.

The instrument automatically stores (records) up to 100 temperature readings in nonvolatile
memory for later recall. During a single scanning session, the IRT855DL can simultaneously
display real-time measurements on a primary (larger) readout and the maximum, minimum or
average measurement, or the largest difference between measurements, during that session
on a secondary (smaller) readout. Its range and D:S ratio make this IRT suitable for use in
superheated and subcooled applications.

2

KEY FEATURES

• Extremely wide measurement range • Adjustable emissivity • Laser pointer

• Includes “K” port and “K” type bead thermocouple for making contact surface
temperature measurements

• Includes USB port and cable and PC interface-data logging software on mini-disc

• Releasing trigger holds measurement

• Can store and recall up to 100 temperature readings

• Min/Max/Avg/Dif displays • Adjustable Hi and Lo temperature alarm setpoints

• Large backlit LCD w/dual 4-digit readouts

• Auto power off (can be disabled for data logging and is automatically disabled in
measurement lock mode)

• °C/°F and laser on/off buttons • Low battery indicator

SAFETY INSTRUCTIONS

WARNING!

The IRT855DL is a Class 2 laser product that emits less than 1mW of radiation at a wavelength
between 630 and 670nm. Avoid looking directly at the laser pointer. U.S. law prohibits pointing
a laser beam at aircraft; doing so is punishable by a fine of up to $10,000 and imprisonment.

The laser may cause discomfort if viewed directly. Your eyes’ natural aversion reflex will
prevent you from looking at the beam long enough to cause harm. As a precaution, keep the
IRT855DL out of the hands of children, especially if you have pets.

Never stare at the laser beam through binoculars or a magnifying glass.
Do not operate the IRT in the presence of flammable or explosive gases or in environments full

of dust or static electricity.
Do not operate the unit near a source of a strong electromagnetic field, such as an arc welder

or an induction heater.
Be careful not to burn yourself when attaching the bead thermocouple probe to a hot surface.

WHAT’S IN THE PACKAGE

The IRT855DL comes in a custom metal carrying case inside a cardboard box. Also in the case
are:

• A “K” type bead thermocouple with a range of -40° to 500°F (-40° to 260°C)

• A cable with a full-size USB plug at one end and a micro-USB plug at the other

• PC interface-data logging software on a mini-disc

• (1) “9V” battery • This user's manual • A 9V AC adaptor

3

PRODUCT OVERVIEW

Fig. 1 shows all of the controls, indicators and physical structures of the IRT855DL. Fig. 2
shows all possible indications on the LCD. Familiarize yourself with the position and meaning
of all buttons, indicators, physical structures and display indications before moving on to the
Setup Instructions and Operating Instructions.

A. LCD
B. /▲. Used to turn laser pointer on and off. Also used to increment number of selected

memory storage location and value of High and Low alarm setpoint.

C.

MODE

button. Used to choose Min, Max, Dif or Avg value for display on secondary

readout. Also used to save emissivity setting.

D. /▼. Used to turn backlight on and off. Also used to decrement number of selected

memory storage location and value of High and Low alarm setpoint.

E.

°C/°F

button. Toggles between

two measurement units.

F.

SEL

button. Enables display of
temperature value measured
by “K” type probe on primary
readout. Also used to view
and adjust values of

␧ (emissivity setting) and

HAL

and

LAL

(Hi and Low

temperature alarm setpoints)

G.

MEM

button. Used to store
measurements in on-board
memory. Also used to save
/settings of

␧,

HAL

and

LAL

.

H.

RCL

button. Used to recall and

delete stored readings.

I.

USB

button. Used to enter Measurement Lock mode and to enable PC interface

J. Measurement trigger K. Laser pointer aperture L. Battery compartment

M. Micro-USB jack N. Jack for 9VDC adaptor output O. Tripod mount

P. Jack for “K” type thermocouple with spade lugs

Q. Laser Identification/Certification/Warning/Safety labels

4

Fig. 1. The IRT855DL’s controls, indicators and

physical structures

BOTTOM

O

A

O

D

O

L

O

Q

O

E

O

B

O

C

O

K

O

O

OMONO

P

OFOGOHOIO

J

IR = -25 ° to 3002 °F (-32° to 1650°C

)

K (TC) = -40° to 2498°F (-40° to 1370°C

)

IRT855DL

IR Thermometer

D

:

S

=

5

0

:

1

2

5

@

1

2

5

0

5

0

@

2

5

0

0

7

5

@

3

7

5

0

1

@

5

0

2

@

1

0

0

3

@

1

5

0

i

n

c

h

m

m

Complies with 21 CFR 1040.1 0 and 1040.11

except for deviations pursu ant to Laser Notice

No. 50, dated June 24, 2007 .