Omega OS523, OS531, OS530L, OS532, OS53X-CF User Manual

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MADE IN

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User’sGuide

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Shown with

Built-in Laser Sighting

OS531, OS532, OS53x-CF,

OS533, OS534, OS530L, OS530HR

OS523, OS524 OMEGASCOPE®

Handheld Infrared Thermometer

 

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Internet e-mail

 

 

omega.com

 

info@omega.com

 

 

 

 

 

 

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The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.

WARNING: These products are not designed for use in, and should not be used for, human applications.

Unpacking Instructions

Notes

n4

Unpacking Instructions

Remove the Packing List and verify that you have received all equipment, including the following (quantities in parentheses):

OS530/OS520 Series Handheld Infrared Thermometer (1)

AA Size Lithium Batteries (4)

Soft Cover Carrying Case (1)

Analog Cable (1)

RS232 Cable (only for OS533, OS534, OS523, OS524)

CD Software (only for OS533, OS534, OS523, OS524)

Quick Start Manual (1)

User’s Guide (1)

Accessories

Model No.

Description

 

 

OS520-ADAPTER-110V

110 VAC wall Adaptor, 9 VDC @ 200 mA

OS520-ADAPTER-220V

230 VAC wall Adaptor, 9 VDC @ 300 mA

OS520-RCC

Hard Carrying Case, Standard

OS520-SC-RCC

Hard Carrying Case, Large

88013K

Surface Probe, K Type T/C, up to 815°C (1500°F)

88001K

Surface Probe, K Type T/C, up to 482°C (900°F)

CAL-3-IR

NIST Traceable Calibration

SC-520

Sighting Scope

If you have any questions about the shipment, please call the Customer Service Department at:

1-800-622-2378 or 203-359-1660. We can also be reached on the Internet at www.omega.com

e-mail: info@omega.com

When you receive the shipment, inspect the container and equipment for signs of damage. Note any evidence of rough handling in transit. Immediately report any damage to the shipping agent.

NOTE

The carrier will not honor damage claims unless all shipping material is saved for inspection. After examining and removing contents, save packing material and carton in the event reshipment is necessary.

i

ii

 

 

OS530/OS520 Series

TABLE OF

 

 

Handheld Infrared Thermometer

CONTENTS

 

 

 

 

 

 

 

Page

Unpacking Instructions

i

Chapter

1

General Description . . . . . . . . . . . . . . . . . . . . . . . .

. . 1-1

1.1

 

Introduction

1-1

1.2

 

Parts of the Thermometer

1-4

1.2.1

Front of the Thermometer

1-4

1.2.2

Rear of the Thermometer

1-6

Chapter

2

Using the Handheld Infrared Thermometer . . . . . . .

. . 2-1

2.1

 

How to Power the Thermometer

2-1

2.1.1

Battery Operation

2-1

2.1.2

ac Power Operation

2-1

2.2

 

Operating the Thermometer

2-2

2.2.1

Measurement Techniques

2-6

2.3

 

Real Time Mode (Active Operation)

2-8

2.3.1

Adjusting Emissivity

2-11

2.3.2

Using the LOCK Function

2-11

2.3.3

Calculating Temperature Values

2-12

2.3.4

Changing the Temperature from °F to °C (or vice versa)

2-12

2.3.5

Turning on the Display Backlighting

2-12

2.3.6

Thermocouple Input

2-13

2.3.7

Using the Alarm Functions

2-14

2.3.8

Using Ambient Target Temperature Compensation

2-16

2.3.9

Sending Temperature Data to a Series Printer

2.17

2.3.10

Sending Temperature Data to a Personal Computer

2.19

2.3.10.1 Software Installation

2.19

2.3.11

Storing the Temperature Data on Command

2-23

2.3.12

Erasing the Temperature Data form Memory

2.24

2.4

 

Recall Mode (Passive Operation)

2-25

2.4.1

Reviewing the Last Parameters

2-27

2.4.2

Downloading PReviously Stored Temperature Data

2-27

2.4.3

Reviewing Previously Stored Temperature

2-29

Chapter

3

Laser Sighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 3-1

3.1

 

Warnings and Cautions

3-1

3.2

 

Description

3-2

3.3

 

Operating the Laser Sighting

3-3

Chapter

4

Sighting Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 4-1

Chapter

5

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 5-1

5.1

 

Replacing the Batteries

5-1

5.2

 

Cleaning the Lens

5-2

5.3

 

Calibrating the Thermometer

5-2

5.4

 

Servicing the Laser Sighting

5-2

Chapter

6

Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . .

. . 6-1

Chapter

7

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 7-1

Chapter

8

Glossary of Key Strokes . . . . . . . . . . . . . . . . . . . . .

. . 8-1

iii

TABLE OF

CONTENTS

Appendix A How Infrared Thermometry Works . . . . . . . . . . . . .

A-1

Appendix

B

Emissivity Values . . . . . . . . . . . . . . . . . . . . . . . . . . .

B-1

Appendix

C

Determining an Unknown Emissivity . . . . . . . . . . . .

C-1

Index . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-1

iv

General Description

1

1.1 Introduction

The OS530/OS520 series Handheld Infrared (IR) Thermometers provide non-contact temperature measurements up to 4500°F. They offer effective solutions for many non-contact temperature applications, including the following:

Predictive Maintenance: Tracking temperature shifts which indicate pending failure in solenoid valves.

Energy Auditing: Locating wall insulation voids to reduce building heating costs.

Food Processing: Taking accurate temperature readings without direct contact with the food or packaging material.

The IR thermometer provides information at a glance — the custom backlit dual digital LCD displays both current and minimum, maximum, average or differential temperatures. This versatile instrument provides:

Measurable target distances from 5 inches to approximately 100 feet

Emissivity adjustable from 0.1 to 1.00 in 0.01 steps provides ease of use when measuring a variety of surfaces.

Built-in Laser sighting in Circle & Dot configurations.

Thermocouple input available.

An electronic trigger lock feature set via the keypad allows continuous temperature measurement up to 4 times per second.

Audible and visual alarms. The high and low alarm points are set via the keypad.

1 mV per degree (°F or °C) analog output, which allows interfacing with data acquisition equipment (including chart recorders, dataloggers and computers). OS524 provides 0.5 mV/Deg.

Last temperature recall.

Backlit display useful in low ambient light conditions.

Powers from 4 AA size batteries or an ac adapter.

RS232 serial communication to a PC or printer. This allows downloading data for further analysis.

Ambient target temperature compensation. This provides more accuracy for measuring low emissivity targets.

Record up to 100 temperature data points. Review the recorded data on the thermometer LCD, as well as downloading the data to a PC.

1-1

1 General Description

The thermometer is easy to use:

Units have standard “V” groove aiming sights.

Integral tripod mount permits hands-free operation, if necessary.

Temperature readings are switchable from °F to °C via the keypad.

Parameters, such as target material emissivity and alarm setpoints, can be set and remain in memory until reset.

This instrument has a rugged and functional design, including:

Sealed keypad display.

Convenient trigger operation.

Soft carrying case and wrist strap, for safety and ease of carrying.

Rubber boot around the lens and the display.

Table 1-1. OS530 Series Handheld Infrared Thermometer Features

Features

OS531

OS532

OS533

OS534

Accuracy*

±2% rdg

±1% rdg

±1% rdg

±1% rdg

Range

0 to 750°F

0 to 1000°F

0 to 1000°F

0 to 1600°F

 

(-18 to 400°C)

(-18 to 538°C)

(-18 to 538°C)

(-18 to 871°C)

Emissivity

adjustable

adjustable

adjustable

adjustable

Backlit Dual Display

standard

standard

standard

standard

Distance to Spot

10:1

10:1

20:1

30:1

Size Ratio

Differential Temperature

standard

standard

standard

standard

Min/Max Temperature

standard

standard

standard

standard

Average Temperature

standard

standard

standard

standard

High Alarm

standard

standard

standard

standard

Thermocouple Input

standard

standard

standard

Audible Alarm

standard

standard

standard

standard

& Indicator

Analog Output

1mV/deg

1mV/deg

1mV/deg

1mV/deg

Built-in Laser Sighting

dot/circle

dot/circle

dot/circle

dot/circle

Trigger Lock

standard

standard

standard

standard

Last Temperature Recall

standard

standard

standard

standard

Low Alarm

standard

standard

Ambient Target

standard

standard

Temperature

Compensation

 

 

 

 

RS232 Interface

standard

standard

Data Storage

standard

 

 

 

 

 

1-2

General Description 1

Features

OS530L

OS530HR

OS530L-CF

OS533-CF

OS534-CF

Accuracy*

±1% rdg

3°F (1.7 °C)

±1% rdg

±1% rdg

±1% rdg

Range

-18 to 538°C

-30 to 121°C

-18 to 538°C

-18 to 538°C

-18 to 871°C

 

0 to 1000°F

-22 to 250°F

0 to 1000°F

0 to 1000°F

0 to 1600°F

Emissivity

Adjustable

Adjustable

Adjustable

Adjustable

Adjustable

Display Resolution

1°F or 1°C

0.1°For 0.1°C

1°F or 1°C

1°F or 1°C

1°F or 1°C

Backlit Dual

std

std

std

std

std

Display

 

 

 

 

 

Field of view

10:1

20:1

.15"@6"

.15"@6"

.15"@6"

Differential

std

std

std

std

std

Temperature

Min/Max

std

std

std

std

std

Temperature

Average

std

std

std

std

std

Temperature

High Alarm

std

std

std

std

std

Low Alarm

---

---

---

std

std

Audible Buzzer

std

std

std

std

std

& Indicator

Ambient Target

---

---

---

std

std

Temp

Compensation

 

 

 

 

 

Analog Output

1 mV/Deg

1 mV/Deg

1 mV/Deg

1 mV/Deg

1 mV/Deg

RS232 Output

---

---

---

std

std

Data Storage

---

---

---

---

std

Built-in Laser

Dot/Circle

Dot/Circle

Dot

Dot

Dot

sighting

 

 

 

 

 

Trigger Lock

std

std

std

std

std

Last Temperature

std

std

std

std

std

Recall

Thermocouple

---

---

---

std

std

Input

*The temperature accuracy is 1% or 2% of Rdg or 3ºF (2ºC) whichever is greater.

1-3

1

General Description

 

 

 

 

 

 

 

 

Features

OS523**

OS524

Accuracy

±1%rdg

±1% rdg

Range

 

0 to 2500°F

1000 to 4500°F

 

 

(-18 to 1371°C)

(538 to 2482°C)

Emissivity

adjustable

adjustable

Backlit Dual Display

standard

standard

Distance to Spot Size Ratio

varies**

110:1

Differential Temperature

standard

standard

Min/Max Temperature

standard

standard

Average Temperature

standard

standard

High Alarm

standard

standard

Low Alarm

standard

standard

Audible Alarm & Indicator

standard

standard

Ambient Target

 

 

Temperature Compensation

standard

standard

Analog Output

1 mV/deg

0.5 mV/deg

RS-232 Output

standard

standard

Thermocouple Input

–––

–––

Data Storage

standard

standard

Built-in Laser Sighting

standard

standard

Trigger Lock

standard

standard

Last Temperature Recall

standard

standard

** OS523 provides three field of views:

 

Distance to Spot Size Ratio

OS523-1

30:1

OS523-2

60:1

OS523-3

68:1

 

 

1-4

Omega OS523, OS531, OS530L, OS532, OS53X-CF User Manual

General Description

1

 

 

1.2Parts of the Thermometer

1.2.1Front of the Thermometer

°F

Figure 1-1. OS530/OS520 Series Handheld Infrared Thermometer Front View

The display is shown in more detail in Figure 1-2 and described in Table 1-2.

There are no user-serviceable parts in the thermometer.

Refer to Chapter 3 for Laser Sight information.

1-5

1 General Description

Figure 1-2. Display

and Keypad View

1

 

 

 

2

 

 

 

 

3

10

LCK

HAL

LOBAT

4

ATC

LAL

PRN °F °C

 

 

 

 

5

9

 

 

 

6

8

 

 

 

7

 

 

Table 1-2. Display Details

 

 

 

 

Key

 

Description

Display Mode displays one of the following:

 

 

TC (Thermocouple Input)

 

E (Emissivity)

HAL (High Alarm Setpoint)

 

MAX (Maximum Temperature)

LAL (Low Alarm Setpoint)

 

MIN (Minimum Temperature)

AMB (Ambient Target Temp)

 

dIF (Differential Temperature)

PRN (Print Data)

 

AVG (Average Temperature)

MEM (Store Temperature Data)

 

 

 

 

Data associated with one of the Display Modes

 

 

Backlighting Icon - allows the display to be viewed under low ambient light

 

 

Displays the units of measure in either °F or °C

 

 

Main display - displays the current temperature

 

 

Locks the trigger / Enables or Disables alarms

 

 

▲ for incrementing data;

is for turning on/off the backlighting

 

 

▼ for decrementing data;

is for changing the units of measure from °F to °C or vice versa

 

 

Function key for scrolling through the display modes

 

Display Icons

 

 

Trigger Lock

 

Low Alarm

 

 

Ambient Target

 

Low Battery

 

 

 

 

 

High Alarm

 

Print Data

 

 

 

 

 

 

 

 

LAL, AMB, PRN: OS533, OS534, OS523, OS524

 

 

 

 

 

 

 

TC: OS532, OS533, OS534

 

 

MEM: OS534, OS523, OS524

 

 

1-6

General Description

1

 

 

1.2.2 Rear of the Thermometer

Figure 1-3 shows the various jacks that are used to connect a recorder or the ac adapter to the thermometer. The figure also shows the location of the tripod thread mount used for fixed point monitoring. More details are provided in Section 2.2.1.

Laser

Dot/Circle

Switch

Laser Beam

Aperture

Figure 1-3. OS530 Series Handheld Infrared Thermometer Rear View

1-7

1 General Description

Notes

1-8

Using the Handheld Infrared Thermometer

2

2.1 How to Power the Thermometer

2.1.1 Battery Operation

Invert the thermometer and install 4 fresh AA size batteries as shown in Figure 2-1. Make sure the batteries’ polarities are correct, the batteries are not put in backwards, and are of the same type.

NOTE

If the icon flashes, the batteries must be replaced with fresh batteries immediately.

Figure 2-1. Installing the Batteries

2.1.2 ac Power Operation

The thermometer may be operated on ac power using the optional ac adapter. 120Vac/60 Hz and 220Vac/50 Hz adapters are available. When operating on ac power the batteries supply backup power in case of ac power failure. The ac adapter input jack is shown in Figure 1-3.

2-1

2 Using the Handheld Infrared Thermometer

2.2 Operating the Thermometer

1a. (Without the Laser Sighting) -Aim the thermometer at the target to be measured. Use the “V” groove (shown in

Figure 1-1) on top of the thermometer to align the target to the thermometer’s field of view. Look down the “V” groove with one eye only, in order to guarantee proper sighting.

Pull and hold the trigger.

1b. (With the Laser Sighting) - Set the laser power switch to the ON position. Aim at the target and pull the trigger. The laser beam and the red power indicator LED will turn on while the trigger is pulled. Refer to Chapter 3 for more details on the Laser Sighting.

Figure 2-2. OS530/OS520 Series with Built-in Laser Sighting

2.The field of view of the thermometer should fall within the area

of the target being measured. See Figure 2-3. Figures 2-4 through 2-6 show the field of view vs distance for the various thermometers.

Field of View

Target

(ACCEPTABLE) (UNACCEPTABLE)

Figure 2-3. Field of View Positions

2-2

Using the Handheld Infrared Thermometer

2

 

 

SPOT DIA. * (IN)

 

 

 

 

 

 

 

 

 

SPOT DIA. * (CM)

 

 

 

 

 

 

 

 

 

 

Figure 2-4. Field of View OS531, OS532, OS530L

 

 

0**

 

DISTANCE: SENSOR TO OBJECT (FT)

 

 

(IN)

1'

20"

2'

3'

4'

5'

6'

7'

8'

 

 

 

 

 

 

 

 

 

DIA.*

 

 

 

 

 

 

 

4.2"

4.8"

 

 

 

 

 

 

3.6"

 

SPOT

 

1.0" @ 0" to 20"

 

3.0"

 

 

 

2.4"

 

 

 

 

 

 

1.8"

 

 

 

 

 

 

1.0"

 

 

 

 

 

 

 

1.0"

 

1.2"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D:S = 20:1

 

 

2.5

 

4.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* (CM)

 

 

 

 

6.0

 

 

 

 

2.5cm @ 51cm

 

8.0

 

 

 

 

*SPOT DIAMETER MEASURED

10.0

 

 

DIA.

 

 

 

12.2

 

 

AT 90% ENERGY

 

 

 

 

 

 

 

 

 

SPOT

40

 

80

120

160

200

 

244

 

 

DISTANCE: SENSOR TO OBJECT (CM)

 

 

 

 

 

 

 

Figure 2-5 Field of View OS533, OS530HR

** Measurement distance is from the outside surface of the rubber boot.

2-3

2 Using the Handheld Infrared Thermometer

Figure 2-6 Field of View OS534, OS523-1

 

 

 

DISTANCE: SENSOR LENS TO OBJECT (in.)

(IN)

0

3"

6"

9"

12"

15"

 

 

 

 

 

 

 

DIA.*

 

 

 

 

 

 

SPOT

 

 

 

 

.78"

1.17"

0.9"

.45"

.15"

.39"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D:S = 40:1

* (MM)

22

11.5

3.9

9.9

 

 

 

19.9

 

 

 

 

 

 

 

 

 

29.9

 

 

 

 

 

 

*SPOT DIAMETER MEASURED

 

 

SPOT DIA.

 

AT 90% ENERGY

 

 

 

0

7.6

15.2

22.9

30.5

38.1

 

 

 

DISTANCE: SENSOR LENS TO OBJECT (cm.)

Figure 2-7 Field of View OS53x-CF

2-4

Using the Handheld Infrared Thermometer 2

 

 

 

DISTANCE: SENSOR TO OBJECT (FT)

 

(IN)

0'

3'

5'

10'

16'

*

 

 

 

 

 

DIA.

 

 

 

 

2.9"

 

 

 

1.9"

 

SPOT

 

 

 

 

0.9"@ 0

1.2"

 

 

 

 

 

 

 

 

 

1.0"

 

 

 

 

0.9"

 

 

 

 

 

 

 

 

D:S = 60:1

 

(MM)

 

26

 

 

 

 

 

31

 

 

 

22mm @ 0

 

 

 

*

 

 

 

48

 

DIA.

 

 

 

 

*SPOT DIAMETER MEASURED

 

75

 

AT 90% ENERGY

 

SPOT

 

 

 

 

 

0

1.0

1.5

3.0

5.0

 

 

 

DISTANCE: SENSOR TO OBJECT (M)

 

 

 

Figure 2-8 Field of View OS523-2

 

 

 

 

DISTANCE: SENSOR TO OBJECT (FT)

 

(IN)

0’

2’

3’

5’

10’

16’

 

 

 

 

 

 

SPOT DIA.*

 

.35"@ 24"

 

4.0"

7.0"

 

 

 

 

 

 

 

.8"

 

.9"

1.6"

 

 

 

 

 

 

 

 

21

 

22

42

 

 

 

 

 

101

 

 

 

 

 

 

181

(MM)

9mm @ 610mm

 

 

 

*SPOT DIAMETER MEASURED

 

 

*

 

 

DIA.

 

 

 

AT 90% ENERGY

 

 

 

 

 

 

 

 

 

SPOT

0

.61

1.0

1.5

3.0

5.0

 

 

 

 

 

 

 

 

 

DISTANCE: SENSOR TO OBJECT (M)

 

 

Figure 2-9 Field of View OS523-3

 

 

 

 

 

 

 

2-5

2 Using the Handheld Infrared Thermometer

 

 

DISTANCE: SENSOR TO OBJECT (FT)

 

(IN)

0'

16'

50'

82'

 

 

 

 

DIA.*

 

 

 

 

SPOT

0.5"@ 0

 

8.7"

 

 

 

 

 

 

5.1"

 

0.9"

1.5"

 

 

 

 

 

 

 

D:S = 110:1

 

 

 

38

130

221

 

 

 

(MM)

 

13mm @ 0

 

 

*

 

 

 

 

DIA.

*SPOT DIAMETER MEASURED

 

 

 

AT 90% ENERGY

 

 

SPOT

 

 

 

0

5

15

25

 

 

DISTANCE: SENSOR TO OBJECT (M)

 

Figure 2-10 Field of View OS524

3.The target temperature and emissivity are displayed on the LCD. Determine the emissivity of the target (refer to Appendix B). Press the

key to increment the target emissivity. Press the key to decrement the target emissivity.

4.Press the key to lock the trigger. The icon will appear on the display. This allows the thermometer to operate continuously

whether or not the trigger is pulled. To unlock the trigger, press the

key again. The icon is no longer displayed. When the trigger is pulled, the Laser Sighting as well as the display backlight

will stay on .

5.After completing a temperature measurement, release the trigger. In order to conserve battery life, the thermometer goes into sleep mode and the Laser Sighting turns off.

2-6

Using the Handheld Infrared Thermometer 2

2.2.1 Measurement Techniques

You can use the IR Thermometer to collect temperature data in any one of five different ways:

Spot Measurement — Measures the temperature of discrete objects such as motor bearings, engine exhaust manifolds, etc.:

1.Aim at the desired target and pull the trigger.

2. If necessary, adjust the emissivity using the

and

keys.

 

3.Read the temperature.

Differential Measurement — Measures the temperature differential between two spots (the maximum and minimum temperatures viewed)

1.Aim the thermometer at the first spot and pull the trigger. Press the key to lock the trigger.

2.If necessary, adjust the emissivity.

3.Aim at the second spot.

4.Adjust the emissivity of the second spot if required.

5. To display the differential temperature, press the

key until

“dIF” appears on the display.

 

6.Read the differential temperature from the upper display.

7.Press the key to unlock the trigger.

Static Surface Scan – Measures the temperature across a static

surface:

1.Aim the thermometer at a starting point and pull the trigger. Press the key to lock the trigger.

2.If necessary, adjust the emissivity.

3.Slowly move the thermometer so that the line of sight sweeps across the surface. The thermometer measures the temperature at each point on the surface.

4.To record the temperature profile across the surface, connect the IR thermometer to a strip chart recorder. Refer to Figure 2-7 for details. The IR thermometer provides an analog output of 1mV/degree. (0.5 mV/Deg on OS524)

5. After all the data has been taken, press the

key to unlock

the trigger.

 

2-7

2 Using the Handheld Infrared Thermometer

NOTE

Center hole is the

analog output jack

Analog

Cable

To Strip Chart

Recorder

Figure 2-11 Recorder Hookup

Moving Surface Scan - Measures the Temperature of Points on a Moving Surface:

1.Mount the thermometer on a camera tripod and aim at a fixed point on the moving surface.

2.Pull the trigger and press the key to lock the trigger.

3.If necessary, adjust the emissivity. The thermometer is now set up for measuring the temperature of a moving surface.

4.To record the temperature profile of the moving surface, connect the IR thermometer to a strip chart recorder. Refer to Figure 2-11 for details.

5.After all data is taken, press the key to unlock the trigger.

Fixed Point Monitoring Over Time - Monitors the temperature at a fixed point over time:

NOTE

It is recommended that you use the ac adapter for long term measurement of temperature.

1.Mount the thermometer on a camera tripod and aim at the target.

2.Connect the analog output of the thermometer to a strip chart recorder as shown in Figure 2-11.

3.Pull the trigger and press the key to lock the trigger.

4.If necessary, adjust the emissivity.

5.The thermometer is now set up for unattended monitoring of temperature over time. You can also download the temperature to a Serial Printer or a PC for further analysis (Models OS533, OS534, OS523, OS524).

6.After all data is taken, press the key to unlock the trigger.

2-8

Using the Handheld Infrared Thermometer 2

2.3 Real Time Mode (Active Operation)

Definition: Real Time Mode is the active operational mode of the thermometer. In this mode, the thermometer constantly measures and displays temperature.

Figure 2-12. General Operational Block Diagram

NOTE

If the trigger is pulled two times in rapid sequence,

it may reset the emissivity, high alarm, low alarm and target ambient temperature to the default values.

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