OS550 BB Series Industrial Infrared Thermometer

User’s Guide

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www.omega.com e-mail: [email protected]

OS550/OS550-BB Series

Industrial Infrared

Thermometer/Transmitter

OMEGAnet

®

Online Service Internet e-mail www.omega.com [email protected]

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ISO 9001 Certified

Canada:

Servicing North America:

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Tel: (203) 359-1660 e-mail: [email protected]

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Tel: (514) 856-6928 e-mail: [email protected]

FAX: (203) 359-7700

FAX: (514) 856-6886

For immediate technical or application assistance:

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Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA ®

Customer Service: 1-800-622-2378 / 1-800-622-BEST ®

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Servicing Europe:

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[email protected]

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Toll Free in United Kingdom: 0800-488-488 e-mail: [email protected]

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification of its products to the European New Approach

Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. 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, patient-connected applications.

Unpacking Instructions

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

OS550 or OS550-BB Series Infrared Thermometer with Sensor Head (1)

RS-232 Cable with connector/adapter (OS552, OS553, OS554) only (1)

3.5” Floppy Disk ( OS552, OS553, OS554) only (1)

User’s Guide (1)

Optional Accessories:

Model No.

Description

OS550-MB

OS550-AP

OS550-MF

OS550-WC

OS550-LS

PSS-12

Mounting Bracket

Air Purge Collar

Mounting Flange

Water Cool Jacket

Laser Sight

Power Supply

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

Department at 1-800-622-2378.

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.

From the Technical Library of ____________________________________

i

ii

OS550 Series

Industrial Infrared Thermometer

This page is intentionally blank



TABLE OF

CONTENTS

Page

Unpacking Instructions ...................................................................... i

Chapter 1 General Description .................................................... 1-1

1.1

Introduction ......................................................................................... 1-1

1.2

Thermometer Features ....................................................................... 1-2

1.2.1

Display Details...................................................................................... 1-3

1.2.2

Parts of the Thermometer .................................................................. 1-4

Chapter 2 Installing the Handheld Infrared Thermometer ............. 2-1

2.1

Installation ............................................................................................ 2-1

2.1.1

Sensor Head Installation ..................................................................... 2-1

2.1.2

Display Electronics Installation ......................................................... 2-1

2.1.3

OS550-BB Installation .......................................................................... 2-1

2.2

Sensor Head Dimensions ................................................................... 2-2

2.3

2.4

Display Electronics Dimensions ........................................................ 2-3

Display Mounting Dimensions ......................................................... 2-4

2.5

2.6

2.7

2.8

Mounting Bracket Dimensions .......................................................... 2-5

Mounting Nut Dimensions ................................................................ 2-5

Mounting Flange Dimensions ........................................................... 2-6

Air Purge Collar Dimensions ............................................................ 2-6

Chapter 3 Using the Infrared Thermometer .................................. 3-1

3.1

Using the Infrared Thermometer ...................................................... 3-1

3.1.1

Water Cool Jacket Accessory ............................................................. 3-1

3.2

How To Power the Thermometer ...................................................... 3-2

3.2.1

Cable Connection ................................................................................. 3-2

3.2.2

Terminal Block Wire Connections .................................................... 3-2

3.3

Operating the Thermometer............................................................... 3-3

3.3.1

Field of View Charts ............................................................ 3-4, 3-5, 3-6

3.4

Measurement Techniques ................................................................... 3-7

3.4.1

Real Time Mode (Active Operation) ................................................. 3-9

3.5.1

Adjusting Emissivity ......................................................................... 3-12

3.5.2

Calculating Temperature Values ......................................................3-13

3.5.3

Changing the Temperature for °F to °C.......................................... 3-13

3.5.4

Turning the Display Backlighting ON/OFF ...................................3-13

3.5.5

Using the Alarm Functions............................................................... 3-14

3.5.6

Using Ambient Target Temperature Compensation .....................3-16

3.5.7

Sending Temperature Data to a Serial Printer ................................3-17

3.5.8

Sending Temperature Data to a Personal Computer.....................3-19

3.5.9

Storing the Temperature Data on Command .................................3-22

3.5.10

Erasing the Temperature from Memory..........................................3-23

3.6

Recall Mode (Passive Operation)......................................................3-24

3.6.1

Reviewing the Last Parameters.........................................................3-26

3.6.2

Downloading Previously Stored Temperature Data .....................3-26

3.6.3

Reviewing Previously Stored Temperature Data...........................3-28

iii

TABLE OF

CONTENTS



Chapter 4 Laser Sight Accessory ................................................... 4-1

4.1

Warnings and Cautions ...................................................................... 4-1

4.2

4.3

Description ........................................................................................... 4-2

Operating the Laser ............................................................................. 4-3

4.3.1

Installing the Laser Sight onto the Thermometer............................ 4-3

4.3.2

Powering the Laser Sight Accessory ................................................. 4-3

Page

Chapter 5 Maintenance ............................................................... 5-1

5.1

Cleaning the Lens ................................................................................ 5-1

5.2

Calibrating the Thermometer ............................................................ 5-1

Chapter 6 Troubleshooting Guide ................................................ 6-1

Chapter 7 Specifications .............................................................. 7-1

Chapter 8 Glossary of Key Strokes ............................................. 8-1

Appendix A How Infrared Thermometry Works .......................... A-1

Appendix B Emissivity Values ..................................................... B-1

Appendix C Determining an Unknown Emissivity ........................ C-1

Addendum Rev.2/1999 .............................................................. D-1

Index ............................................................................................. I-1 iv

General Description

1

1.1 Introduction

The OS550 Series Industrial Infrared (IR) Thermometers provide non-contact temperature measurement up to 2500°F (1371°C). 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 a custom backlit dual digital LCD that displays both current and minimum, maximum, average or differential temperatures. This versatile instrument provides:

• Measurable target distances from 5 inches to approximately

200 feet

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

• Continuous temperature measurement up to 4 times per second.

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

• Analog output, 1 mV/degree,4-20mA or 0-5VDC which allows interfacing with data acquisition equipment

(including chart recorders, dataloggers and computers)

• RS232 serial communication to a PC or printer. This allows downloading data for further analysis (OS552, OS553 and

OS554 only).

• 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 (OS553 and OS554 only).

• Last temperature recall.

• Backlit display useful in low ambient light conditions

• Laser Sighting is optional.

1-1

1


1.2 Thermometer Features

The thermometer is easy to use:

• 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.

Features

Accuracy*

Range

Table 1-1. OS550 Series Industrial Infrared Thermometer Features

Emissivity

Backlit Dual

Display

Distance to

Spot Ratio

Differential

Temperature

Min/Max

Temperature

Average

Temperature

High Alarm

Low Alarm

Ambient Target

Temperature

Compensation

RS-232 Output

Data Storage

Last Temperature

Recall

OS551 OS552 OS553 OS554

±1% rdg ±1% rdg ±1% rdg ±1% rdg

0 to 750°F 0 to 1000°F 0 to 1600°F 0 to 2500°F

(-18 to 400°C) (-18 to 538°C) (-18 to 870°C) (-18 to 1371°C) adjustable adjustable adjustable adjustable standard standard standard standard

See Field of View Charts, pages 3-4, 3-5, 3-6 standard standard standard standard

–

–

–

– standard standard standard standard standard standard standard standard

– standard standard standard standard standard standard standard standard standard standard standard standard standard standard standard standard standard standard standard

*or 3°F whichever is greater

1-2

1.2.1 Display Details


1

Figure 1-1. Display and Keypad View

Table 1-2. Display Details

➄

➅

➆

➇

Key

➀

➁

➂

Description

Display Mode displays one of the following:

E

(Emissivity)

HAL

(High Alarm Setpoint)

MAX

(Maximum Temperature) LAL (Low Alarm Setpoint - only on OS522/OS553/OS554)

MIN

(Minimum Temperature)

AMB

(Ambient Target Temp - only on OS522/OS553/OS554)

dIF

(Differential Temperature)

PRN

(Print Data - OS552, OS553 and OS554 only)

AVG

(Average Temperature)

MEM

(Store Temperature Data - only on OS553/OS554)

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

Power On Lock / Enables or Disables alarms

▲ for incrementing data;

▼ for decrementing data; is for turning on/off the backlighting is for changing the units of measure from

°F to °C or vice versa

➈

➉

Function key for scrolling through the display modes

Display Icons

Ambient Target Temperature Low Alarm

High Alarm Print Data

1-3

1


1.2.2 Parts of the Thermometer/Transmitter

NEMA Housing,

Keypad, Display and

Output Electronics

(OS550 Series)

OEM Style

Keypad, Display, and Electronics

(OS550-BB Series)

Sensor Head

1-4

Shown with optional mounting bracket,

OS550-MB and mounting nut OS550-MN

Figure 1-2.

OS550/OS550-BB Series Industrial Infrared Thermometer Front View

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

Note: There are no user-serviceable parts in the thermometer.

Installing the Infrared Thermometer

2

2.1 Installation

2.1.1 Sensor Head Installation

The OS550’s sensor head is made of black anodized aluminum. Both ends of the sensor head come with a 1 1 ⁄

2

- 20 standard threaded mounting connection. The sensor head is connected to the main display electronics via a 15 ft. shielded cable and environmentally sealed twist lock connector.

Mounting accessories are available. See pages 2-4, 2-5 for model numbers and dimensions. Also see page 2-2 for sensor head dimensions.

NOTE

If the sensor head is used in an environment where the ambient temperature is above 122°F (50°C), the water cool jacket accessory (OS550-WC) must be used to maintain accuracy and prevent damage to the sensor head. See Chapter 3.1.

2.1.2 OS550 Series Display NEMA Housing Installation

The OS550 Series’ main display and electronic’s housing is environmentally sealed and weather tight. Mounting ears are provided making mounting easy. Mount the main electronics assembly in a location that you can easily access to view the LCD and make program changes to the unit. See case and mounting plate dimensions on page 2-3.

2.1.3 OS550-BB OEM Style Display Installation

The main display and electronics assembly is provided with an aluminum mounting plate making installation of this OEM style system economical and easy to customize. Assembly should be mounted in a location that is free of dirt, grease, oils, and other liquids. See mounting dimension on page 2-4.

2-1

2


2.2 Sensor Head Dimensions

1

1

⁄

2 x 20 THREAD

1

1

⁄

2 x 20 THREAD

2-2

Fig. 2-1. Sensor Head Dimensions


2

2.3 OS550 Display Electronics Dimensions

131.3

(5.17) TYP.

Ø 4.37 (0.172) MOUNTING HOLE

(4 PLACES)

50.0

(1.97) TYP.

Fig. 2-2. Main Display NEMA Housing with

Mounting Brackets Dimensions

2-3

2


2.4 OS550-BB Series Display Mounting Dimensions

26.4

(1.04)

Ø 5.16 (0.203) THRU TYP. (4 PLACES)

WILL FIT UP TO A

#10 SCREW OR BOLT

57.4

(2.26)

118.4

(4.66)

31.0

(1.22)

26.4

(1.04)

91.4

(3.60)

57.4

(2.26)

5.1

(.20) TYP.

Fig. 2-3. OEM Style Main Display with Mounting Plate

2-4


2

2.5 Mounting Bracket Dimensions (OS550-MB)

50.8

(2.00)

6.4

(.25) REF

38.61

Ø (1.520)

88.9

(3.50)

57.2

(2.25)

25.4

(1.00)

3.18

R (.125)

TYP. 2 PLACES

22.23

(.875)

88.9

(3.50)

12.7

(.50)

28.58

(1.125)

25.4

(1.00)

Fig. 2-4

2.6 Mounting Nut Dimensions (OS550-MN)

3.18

R (.125)

.020 x 45

°

CHAMFER

BOTH SIDES o 2.00

.020 x 45

°

CHAMFER

BOTH SIDES

1 1/2-20-2B THRU

Fig. 2-5

MED. DIAMOND NURL

.250

2-5

2


2.7 Mounting Flange Dimensions (OS550-MF)

TYP. 3 PLACES

120

°

Ø 89 (3.5)

3 HOLES ON Ø 71.1 (2.80)

BOLT CIRCLE

6.35 (.250)

THRU TYP. (3 PLACES)

38 (1.5) - 20 THREAD

Fig. 2-6

6.35

(.250)

2.8 Air Purge Collar Dimensions (OS550-AP)

51 (2.0) DIA.

1/8 N.P.T. TAP THRU

38 (1.5) – 20 THREAD

Fig. 2-7

21.59

(.850)

2-6

Using the Infrared Thermometer

3

3.1 Using the Infrared Thermometer

3.1.1 Water Cool Jacket Accessory

When using the OS550 sensor head in an ambient temperature environment above 122°F (50°C), the OS550-WC Water Cooling Jacket option must be used to maintain the accuracy and response time of the unit.

Two 1 ⁄

8

" N.P.T. compression fittings are provided for connection to copper water lines. A constant flow of 10 GPM of clean, room temperature water is sufficient to protect the instrument and maintain accuracy up to 85°C

(185°F). This option can be installed in the field.

Ø 70.4 (2.77)

63.5 (2.50)

Fig 3-1. Water Cool Jacket Dimensions

OS550-WC

3-1

3

Using the Infrared Thermometer/Transmitter

3.2 How To Power the Thermometer

3.2.1 OS550 Series Cable Connection

The OS550 Series thermometer comes with a built-in 15 ft.

power/output cable. Power and output connections are made to the cable via stripped wire ends located at one end of the cable. The power/output cable can be shortened or extended in the field if needed.

See table 3-1 below for wire Connection.

Power Cable Connections – Table 3-1

Power Connection: 7-24 VDC@80Ma

(+) Red Wire (-) Black Wire Earth Ground -Barewire

Output Cable Connections

Model -MV -MA -V1

Analog

Output

1mV/°C or °F 4-20 mA

Connection (+) White Wire (-) Green Wire

0-5 VDC

3.2.2 OS550-BB Series Terminal Block Wire Connections

SENSOR HEAD RED WIRE

SENSOR HEAD BLACK WIRE

SENSOR HEAD GREEN WIRE

SENSOR HEAD WHITE WIRE

SENSOR HEAD BARE WIRE - SHIELD

DC POWER SUPPLY (EARTH GROUND)

- ANALOG OUTPUT

+ ANALOG OUTPUT

- DC POWER SUPPLY

+ DC POWER SUPPLY (7-24 Vdc)

RS-232 (TRANSMIT)

RS-232 (RECEIVE)

RS-232 (GROUND)

6

7

8

4

5

1

2

3

9

10

11

12

Figure 3-1

3-2


3

3.3 Operating The Thermometer

1. After installing the thermometer (see section 2.1) and connecting power (see section 3.2), your unit will be ready for use.

Your unit has been shipped to you with the SLEEP/ON switch in the

“SLEEP” position. Place the switch in the “ON” position to turn your unit on and begin to make measurements.

OS550 SERIES KEYPAD PARTIAL VIEW

Display

Mode

Display

Icons

ON

SLEEP

Scrolls

Through

Display

Modes

FUNC

SLEEP/ON SWITCH

2. The optical field of view of the thermometers sensor head should fall within the area of the target being measured.

See Figure 3-2. Figures 3-3 through 3-8 show the fields of view vs.

distance for the various thermometers.

Field of View

Target

(ACCEPTABLE) (UNACCEPTABLE)

Figure 3-2. Field of View Positions

3. The target temperature and emissivity are displayed on the LCD.

Determine the emissivity of the target (refer to Appendix B).

Press the

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

3-3

3


3.3.1 Field of View Charts

0 2

DISTANCE: SENSOR TO OBJECT (FT)

3 5 10 16

.35" @ 24"

4.0

.9

1.6

.8

D:S = 68:1

21

22

9mm @ 610 mm

42

*SPOT DIAMETER MEASURED

AT 90% ENERGY

101

0

.61

1.0

1.5

3.0

DISTANCE: SENSOR TO OBJECT (M)

Figure 3-3. OS550 Series (-1 FOV)

7.0

181

5.0

3-4



3

0**

1' 20"


2' 3' 4' 5' 6' 7'

4.2"

3.6"

1.0"

1.0" @ 0" to 20"

1.0"

1.2"

1.8"

2.4"

3.0"

D:S = 20:1

8'

4.8"

2.5

4.0

6.0

2.5cm @ 51cm


AT 90% ENERGY

8.0

40

10.0

80 120 160 200

DISTANCE: SENSOR TO OBJECT (CM)


12.2

244


3-5

3


0

0.9" @ 0

0.9

1.0

3


5

10

1.9

1.2

D:S

=

60:1

16

2.9

26

31

22mm @ 0

48


AT 90% ENERGY

0

1.0

1.5

3.0

DISTANCE: SENSOR TO OBJECT (M)

Fig. 3-7. OS550 Series- (-5FOV)

75

5.0

0

3"

DISTANCE: SENSOR LENS TO OBJECT (in.)

6" 9" 12" 15"

0.9"

1.17"

.45"

.15"

.39"

.78"

D:S = 40:1

0

22

11.5

3.9


A T 90% ENERGY

9.9

19.9

29.9

7.6

15.2

22.9

30.5

38.1

DISTANCE: SENSOR LENS TO OBJECT (cm.)

Figure 3-8. OS550 Series- (-6FOV)

3-6

3


3

3.4 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 the sensor head at the desired target.

2.

If necessary, adjust the emissivity using the keys.

3.

Read the temperature.

and

• Differential Measurement —

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

1.

Aim the thermometer at the first spot.

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

“dIF” appears on the display.

key until

6.

Read the differential temperature from the upper display.

• Static Surface Scan

– Measures the temperature across a static surface:

1.

Aim the thermometer’s sensor head at a starting point.

2.


3.

Slowly move the thermometer’s sensor head 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 that will accept an analog input matching the analog output of the model OS550 that you have selected.

3-7

3


• Moving Surface Scan

- Measures the Temperature of Points on a Moving Surface:

1.

Mount the sensor head and aim at your target.

2.

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

3.

To record the temperature profile of the moving surface, connect the IR thermometer to a strip chart recorder or Data logger.

• Fixed Point Monitoring Over Time

- Monitors the temperature at a fixed point over time:

1.

Mount the sensor head and aim at your target

2.


3 Connect the analog output of the thermometer to a strip chart recorder or datalogger

4.

The thermometer is now set up for unattended monitoring of temperature over time. You can also download the temperature readings to a serial printer or computer.

3-8

Using the Infrared Thermometer

3

3.4.1 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.

Power Applied,

Sleep/On Switch in the On Position

On

Sleep

Mode

(Table 3-1)

Display Turns Off

Immediately

Sleep/On Switch in the Sleep Position

Press

Real Time

Mode (Active)

Display Turns Off in

Approx. 10 Seconds

(No keys pressed)

Recall Mode

(Passive)

(Table 3-2)

Fig. 2-11. General Operational Block Diagram

3-9

Display

Mode:

Real Time Mode

Display shows:

Current temperature

Emissivity

Current temperature

Maximum temperature

Current temperature

Minimum temperature

Current temperature

Differential temperature

Current temperature

Average temperature

Current temperature

High alarm setpoint

Current temperature

Low alarm setpoint

Current temperature

Ambient target temperature

Current temperature

Print interval

Current temperature

Memory location

Press

Go to

Go to

Go to

Go to

Go to

Go to or

Go to

Go to

Go to or

Go to

to...

Press to...

P

LOCK or UNLOCK trigger

ACTIVATE / DEACTIVATE




Store temperature data

NOTE: The unit of measure (

°F or °C) flashes in the Real Time M

*

*

*

*

☞

LCK

°F

°F

☞

LCK

°F

☞

LCK

°F

☞

LCK

°F

☞

LCK

HAL

°F

☞


3

MODE DISPLAY DISPLAY MODE

LCK

LAL

°F

☞

LCK

ATC

°F

☞

LCK

PRN

°F

☞

LCK

°F

☞

Note: This flow-chart can also be found on the back of the label inside the main display housing clear plastic lid.

Figure 3-9 Visual Function Flow Chart

*

While in these 4 modes:

Use key to change temperature from °F to °C or vice versa.

Use key to turn on the display backlighting.

3-11

3


3.5.1 Adjusting Emissivity

°F

Refer to Appendices B and C for information on emissivity before making your adjustment.

1. When the thermometer is powered up, the default emissivity setting will be set to 0.95.

2. If necessary, press the emissivity or press the emissivity.

key to increment the target key to decrement the target

NOTE

The emissivity setting will reset to 0.95 when the thermometer is turned off or there is an interruption of power.

3-12


3

3.5.2 Calculating Temperature Values

The thermometer calculates the MAX, MIN, dIF, and AVG temperatures based on the current temperature.

°F

°F

°F is the maximum temperature since the temperature measurement session starts

(pulling the trigger).

is the minimum temperature since the temperature measurement session starts.

is the difference between the MAX and MIN temperatures.

°F is the true average temperature since the temperature measurement session starts. The average temperature under continuous operation is accurate for a limited period of time

(refer to the specifications). However, the AVG temperature function can be used indefinitely when the thermometer is operating intermittently.

°F

“AVG ---” is displayed when either of the following conditions occur:

1. When the average temperature measurement reaches its time period as stated in the specifications.

2. When the thermometer is trying to measure a target temperature which is outside of its measuring temperature range.

To clear the “AVG ---” display, turn off the thermometer.

NOTE

When the thermometer goes from the sleep mode to the real-time mode, the MAX, MIN, dIF and AVG temperatures are updated.

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

During the time that the thermometer displays either MAX, MIN, dIF, or AVG temperatures, press the key to change all the temperatures from °F to °C or vice versa.

3.5.4 Turning the Display Backlighting ON/OFF

During the time that the thermometer displays either MAX, MIN, dIF, or AVG temperatures, press the key to turn the display backlighting ON/OFF.

3-13

3


3.5.5 Using the Alarm Functions

The thermometer provides audible and visible alarm indications.

• To set the high alarm value:

HAL

°F

1. Press the

(HAL) appears.

key until the High Alarm Display Mode

2. Press the the key to increment the high alarm value. Press key to decrement the high alarm value.

3. Press the key to enable the high alarm function. The icon appears.

If the temperature exceeds the high alarm setpoint, you will hear a beep and the icon on the display flashes.

4. To disable the high alarm, press the and the icon disappears.

key again,

NOTE

If you are not in High Alarm Display Mode (HAL) when the high alarm goes off, you must press the key to get into the High Alarm Display Mode. Then press the key to disable the high alarm.

NOTE

The high alarm setpoint will reset to the default value it the thermometer is turned off or there is an interruption of power.

Default Values:

OS551

OS552

OS553

OS554

750°F

1000°F

1600°F

2500°F

3-14

LAL

°F


3

• To set the low alarm value (OS552, OS553, OS554):

1.

Press and hold the

Mode (LAL) appears.

key until the Low Alarm Display

2.

Press the the key to increment the low alarm value. Press key to decrement the low alarm value.

3.

Press the key to enable the low alarm function. The icon appears.

If the temperature drops below the low alarm setpoint, you will hear a beep and the icon on the display flashes.

4.

To disable the low alarm, press the and the icon disappears.

key again,

NOTE

If you are not in Low Alarm Display Mode (LAL) when the low alarm goes off, you must press the key to get into the Low Alarm Display Mode. Then press the key to disable the low alarm.

NOTE

The low alarm setpoint will reset to the default of

0°F if the unit is turned off or there is an interruption of power.

3-15

3


ATC

3.5.6 Using Ambient Target Temperature Compensation

(OS552, OS553, OS554)

°F

Use the Ambient Target Temperature Compensation

(AMB)

Display Mode when high accuracy readings under both of these conditions are required:

• The target has a low emissivity.

• The ambient temperature around the target is much higher than the ambient temperature around the infrared thermometer.

To set and activate the Ambient Target Temperature

Compensation Mode:

1.

With power applied to the unit, set the emissivity to 1.0

2.

Press and hold the

Mode (AVG) appears.

key until the Average Display

3.

Slowly move the thermometer so that the line of sight sweeps across the area surrounding the target. The thermometer measures the temperature at each point on the surrounding area.

4.

Read the average temperature value from the upper display and record it here __________.

5.

Press and hold the key until the Ambient

Temperature Display Mode (AMB) appears.

6.

Set the AMB temperature found in Step 4 by pressing the key or the key.

7.

Press the key to enable the ambient target temperature compensation. The icon appears on the display.

NOTE

To disable this mode, press the

The icon disappears.

key again.

3-16

ATC

°F


3

8.

Press and hold the

Mode (E) appears.

key until the Emissivity Display

9.

Change the emissivity to the proper value for the target being measured (refer to Section 3.5.1).

10. Aim at the target. The target temperature and emissivity are displayed on the LCD.

NOTE

To disable the Ambient Target Temperature

Compensation at a later time, you must press the key to get into the Ambient Target

Temperature Display Mode. Then press the key to disable it.

NOTE

The target ambient temperature does reset to a default value of 75°F when the thermometer is turned off.

3.5.7 Sending Temperature Data to a Serial Printer

(OS552, OS553, OS554)

The thermometer can transmit temperature data to a Serial

Printer via the RS-232 phone jack and the RS-232 cable.

1. Turn on the Serial Printer and set the following parameters:

PRN

°F

Speed: 4800 BPS

Data: 8 Bits

One Stop Bit

No Parity

2. Remove the whole plug located on the bottom of the unit.

This will allow access to the RS-232 jack.

See figure 3-13.

3. Connect the RS-232 cable between the thermometer and the printer as shown in Figure 3-10. Be sure to install the cable strain relief to maintain the environmental seal.

3-17

3


PRN

°F

NOTE

Bottom hole is the RS-232 jack

Serial Printer

RS-232

Digital Cable

To the

Pyrometer

6-Pin

Phone Jack

25-Pin 'D'

Connector

To the

Printer

Figure 3-10. Serial Printer Hookup

3.

With power applied to the unit, press and hold the until the Print Data Display Mode (PRN) appears.

key

4.

Press the key to increment the printing interval. Press the key to decrement the printing interval. The printing interval

(from 1 to 1999 seconds) is the time between data points. The default value is 2 seconds.

5.

Press the key to start sending data. The appears on the display.

icon

NOTE

To stop sending data, press the the icon disappears.

key again, and

3-18

PRN

°F


3

6.

After all data is taken, press and hold the the Emissivity Display Mode (E) appears.

key until

3.5.8 Sending Temperature Data to a Personal Computer

(OS552, OS553, OS554)

The thermometer can transmit temperature data to a

Personal Computer via the RS-232 phone jack and the

RS-232 cable.

1.

Turn on the Personal Computer.

PRN

°F

2.

Connect the RS-232 cable between the thermometer and the serial port (RS-232 of the Personal Computer as shown below in Figure 3-11.)

NOTE

Bottom hole is the RS-232 jack

Personal

Computer

RS-232

Digital Cable

To the

Pyrometer

6-Pin

Phone Jack

25-Pin 'D'

Connector

To the

Computer

Figure 3-11. Personal Computer Hookup

3.

With power applied to the OS550, press the

The icon will appear on the display.

4.

Press and hold the

Mode (PRN) appears.

key.

key until the Print Data Display

3-19

3

PRN

°F


5.

Press the the key to increment the printing interval. Press key to decrement the printing interval. The printing interval (from 1 to 1999 seconds) is the time between data points. The default value is 2 seconds.

6.

Run the communications program IRP.EXE that is provided on the 3.5” floppy disk.

The following screen will appear:

Select one of two COM ports for your PC serial input/output:

Type ‘1’ for COM1 (default) or ‘2’ for COM 2: 1

Depending on the model of thermometer, this program performs one of the following two functions:

1- Logging temperature data in real time

(OS552, OS553, OS554)

2- Downloading of previously stored temp data

(OS553, OS554)

Enter Filename <ret> (3 characters min)

Enter N/n <ret> for screen display only

Enter Q/q <ret> to quit now

(If the selected file exists, data will be appended)

Filename . . .

Figure 3-12. Computer Screen Display

Select the serial COM port of your PC by entering 1 or 2.

Then type in IRDATA for the file name and press the

Return key (<ret>).

7.

Press the key on the thermometer to begin transmitting data. The icon appears on the display.

3-20

PRN

°F


3

The following is a typical data that appears on the screen.

DEG

INT

EM

MAX

MIN dIF

AVG

HAL

LAL

TEMP

546

551

562

.

.

580

F

002 S

0.84

600

486

114

523

879

435

TIME

00:00:00

00:01:00

Figure 3-13. Computer Screen Showing Typical Data

8.

Press the key on the thermometer to stop transmission of temperature data to the Personal

Computer. The icon disappears.

9.

Press the program.

key on the keyboard to quit the IRP

10. The temperature data from the computer screen is saved in IRDATA file, for example. The temperature data file can be reviewed and analyzed at a future time.

11. After all data is taken, press and hold the the Emissivity Display Mode (E) appears.

key until

3-21

3

Using the Infrared Thermometer/TransmitterGeneral Description

3.5.9 Storing the Temperature Data on Command

(OS553, OS554)

°F

The thermometer can store up to 100 temperature data points on command. Each set of temperature data is broken down into the temperature value, emissivity, and high alarm setpoint for that temperature. This data is stored in non-volatile memory, so power loss will not affect this data. To store temperature data:

1.

With power applied to the unit, place the SLEEP/ON switch to the ON position.

2.

If necessary, press the emissivity or press the key to increment the target key to decrement the target emissivity.

3.

Press and hold the

Mode (MEM) appears.

key until the Memory Display

4.

Press the key to increment the memory location or press the key to decrement the memory location.

The memory location can be from 001 to 100.

5.

Press the key to store the target temperature at the memory location indicated. You will hear a beep to verify that the data is stored.

NOTE

You can write over any previously stored memory locations.

6.

After all data is taken, press and hold the until the Emissivity Display Mode (E) appears.

key

3-22

Using the Infrared Thermometer/TransmitterGeneral Description

3

3.5.10 Erasing the Temperature Data from Memory

The user can erase all 100 temperature data points in memory at any time by using the following procedure:

1.

With power applied to the unit, place the SLEEP/ON switch to the ONposition.

2.

Press the key. The icon will appear.

3.

Place the SLEEP/ON switch to the SLEEP position.

4.

Press the sequence.

key and then the key in rapid

NOTE

If the icon disappeared, repeat

Steps 1 and 2.

The display freezes momentarily, and a beep sounds for about 1 second. Now the memory is cleared. The thermometer reverts to real time mode.

NOTE

Erasing the temperature data does not erase or reset your pre-set Emissivity, High and Low Alarm setpoints, printing interval, and Ambient Target

Temperature compensation.

3-23

3


3.6 Recall Mode (Passive Operation)

Definition: Recall Mode is the passive operational mode of the thermometer. In this mode, you may review the most recently stored temperature data and parameters.

Power Applied,

Sleep/On Switch in the Sleep Position

On

Sleep

Mode

(Table 3-1)

Display Turns Off

Immediately

Sleep/On Switch in the Sleep Position

Press

Real Time

Mode (Active)

Display Turns Off in

Approx. 10 Seconds

(No keys pressed)

Recall Mode

(Passive)

(Table 3-2)

Figure 3-14. General Operational Block Diagram

NOTE

In order to get into the Recall Mode of operation, with power applied to the unit and the Sleep/On switch in the “Sleep “ position press the only.

key

3-24

DISPLAY

MODE:

Display shows:

Last temperature

Emissivity

Last temperature

Maximum temperature

Last temperature

Minimum temperature

Last temperature

Differential temperature

Last temperature

Average temperature

Last temperature

High alarm temperature

Last temperature

Low alarm temperature

Last temperature

Ambient target temperature

Last temperature

Last/stored temperature

Memory location

Recall Mode

Press to...

Press

Go to

Go to

Go to

Go to

Go to

Go to or

Go to

Go to or

Go to

Go to

Disabled

to...

Print stored data

Display stored temperature

NOTE: The unit of measure (°F or °C) stays on (does not flash) during

3


3.6.1 Reviewing the Last Parameters

°F

The thermometer stores the last temperature measured in the real time mode (refer to Table 3-1). This temperature can be recalled by pressing the key.

1. With power applied to the unit, place the SLEEP/ON switch to the SLEEP position.

2. Press the key to review the most recently stored temperature data and parameters. You may review:

• MAX temperature

• MIN temperature

• dIF temperature

• AVG temperature

• HAL temperature

• LAL temperature

• AMB temperature

• MEM location

3-26

3.6.2 Downloading Previously Stored Temperature Data

(OS553, OS554)

Up to 100 sets of stored temperature information can be downloaded to a serial printer or a personal computer. Each set of temperature information is broken down to the temperature value, the Emissivity, and the high alarm setpoint for that temperature.

1a. Turn on the Serial Printer and set the following parameters:

Speed: 4800 BPS

Data: 8 Bits

One Stop Bit

No Parity

or

1b. Turn on the Personal Computer.

2.

Connect the RS-232 cable between the thermometer and the Serial Printer or Personal Computer as shown in

Figure 3-10 or Figure 3-11.


3

3.

Run the communications program IRP.EXE that is provided on the 3.5” floppy disk on your Personal Computer

4.

Press and hold the

Mode (PRN) appear.

key until you see the Print Display

5.

Press the key to start downloading the stored data to the Serial Printer or Personal Computer.

The icon appears on the thermometer display. When the stored data is completely downloaded, you will hear a beep and the icon disappears.

6.

The following is typical data that appears on the computer screen or a printer:

#01

EM 0.60

TMP 400F

HAL 617F

#02

EM 0.83

TMP 290F

HAL 576F

#03

EM 0.90

TMP 242F

HAL 400F

Figure 3-15. Typical Data Downloaded

7.

Press the key on the keyboard to quit the IRP program on the personal computer

3-27

3


3

3.6.3 Reviewing Previously Stored Temperature Data

(OS553, OS554)

You can review all 100 stored temperature values on the thermometer display using the following procedure:

°F

1.

With power applied to the unit, place the SLEEP/ON switch to the SLEEP position

2.

Press and hold the key until you see the Memory

Display Mode (MEM) appear.

3.

Press the press the key to increment the memory location or key to decrement the memory location.

The memory location can be from 001 to 100.

4.

Press the key. The stored temperature is shown in the lower portion of the display. If there is no data stored in a memory location, the display shows “----”.

5.

To review other stored temperatures, repeat Steps 3 and 4.

NOTE

If no keys are pressed, the thermometer goes back into sleep mode in approximately 10 seconds.

3-28

Laser Sight Accessory

4 1

4.1 Warnings and Cautions

CAUTION

When using the laser sight accessory OS550-LS, you may receive harmful laser radiation exposure if you do not adhere to the warnings listed below:

• USE OF CONTROLS OR ADJUSTMENTS OR

PERFORMANCE OF PROCEDURES OTHER

THAN THOSE SPECIFIED HERE MAY RESULT

IN HAZARDOUS RADIATION EXPOSURE.

• DO NOT LOOK AT THE LASER BEAM COMING

OUT OF THE LENS OR VIEW DIRECTLY WITH

OPTICAL INSTRUMENTS — EYE DAMAGE

CAN RESULT.

• USE EXTREME CAUTION WHEN OPERATING THE

LASER SIGHT ACCESSORY.

• NEVER POINT THE LASER SIGHT AT A PERSON.

• KEEP OUT OF REACH OF ALL CHILDREN.

WARNING

DO NOT ATTEMPT TO OPEN THE LASER SIGHT ACCESSORY.

(There are no user-serviceable parts in the unit.)

Refer to the inside back cover of this manual for product warning label.

4-1

4


4.2 Description

A laser sighting accessory is available to aid in the sensor head installation process. When installing a line of sight Infrared transducer with a small spot size and long target distance, it is sometimes difficult to locate the center of the focused spot and the material to be measured. To solve this problem, we offer a laser sighting accessory OS550-LS that will install onto the front of the

OS550 series sensor head. This compact tool provides the installer with a true line of sight laser dot up to a distance of 75 ft. in the center of the IR optical path taking the guess work out of proper alignment during the installation. The laser is powered by a power pack with replaceable batteries and interconnect cable.

4-2

Fig. 4-1


4

4.3 Operating the Laser Sight

4.3.1 Installing the Laser Sight onto the Thermometer

The laser sight accessory (OS550-LS) screws onto the front of the sensor head. Do not over tighten the laser sight accessory onto the sensor head. This accessory is only used during sensor head installation and then removed.

4.3.2 Powering the Laser Sight Accessory

The laser sight head is powered by a small compact battery pack supply provided with this accessory. Connections are made between the laser sighting head and the power pack via a 24" cable with mini mating connectors. Power is turned on and off to the sighting head by a slide switch on the power pack.

4-3

4


Notes

4-4

Maintenance

5.1 Cleaning the Sensor Head Lens

Although all lenses are quite durable, take care to prevent scratching when cleaning them. To clean the lens:

1. Blow off loose particles, using clean air.

2. Gently brush off remaining particles, using a camel hair brush.

Alternatively, clean any remaining contaminants with a damp, soft, clean cloth. Be careful not to rub too hard.

CAUTION

Do not use any ammonia or cleaners with ammonia on the lens, as damage may result. Do not wipe the surface dry, as this may cause scratching.

5.2 Calibrating the Thermometer

The thermometer can not be calibrated by the user. For precise calibration of the thermometer, call our Customer Service

Department. It is recommended that the Infrared Thermometer be sent to the factory once a year for recalibration.

5-1

5

Maintenance

Notes

5-2

Troubleshooting Guide

6

1

THERMOMETER

Problem Solution

The thermometer does a.

Check for proper power not turn on (No Display) connections, see Section 3.2

b.

Contact our Customer Service

Department, unit requires service.

The thermometer is showing an incorrect temperature a.

Make sure you have entered the correct emissivity setting.

b.

Make sure you are not trying to measure a temperature above the maximum temperature range of your model.

The thermometer is

“locked up” (the display is “frozen”).

a.

Try to remove and then re-apply power to reset the unit.

b.

Contact our Customer Service

Department, unit requires service.

6-1

6


Problem

The display is either erratic or stays at one reading

Solution

a.

Clean the thermometer lens.

Refer to Section 5.1.

b.

Activate the Diagnostic Program in the thermometer as follows: c.

Press the key.

d.

Hold down the key and press the displayed.

key until “VER X.X” is

You can expect to see and hear the following:

• You will see the version number “VER X.X” of the software for about 1 second.

• You will hear a beep, “TST” is displayed, and °F flashes.

• Soon after, all of the segments of the display including the backlighting will light up for about 1 second.

• The display will clear and a PAS (pass) or ERR (error) code may be seen on the display.

If you see an error code, either “ERR1”, “ERR2”, or

“ERR3”, record the code and call our Customer

Service Department. Provide Customer Service with the error code that is displayed in the upper left corner of the display. The Customer Service

Department representative may ask you to return the thermometer to the factory.

• The display will go back to the Real Time Mode

(Emissivity Display Mode).

e. After running the diagnostic program, press the key to release this mode.

6-2


6

Problem

The temperature reading is erratic. The sensor head has just been moved from one extreme temperature to room temperature [0°C or

50°C (32°F or 122°F)] or vice versa.

Solution

The thermometer has to stabilize before taking temperature measurements. It takes up to 40 minutes for the thermometer to stabilize.

The temperature reading is erratic. The sensor head has just been moved from room temperature (ambient temperature) to a temperature 10°C colder or warmer.

The thermometer has to stabilize before taking temperature measurements. It takes up to 20 minutes for the thermometer to stabilize.

6-3

6


Notes

6-4

Specifications

7

1

(Specifications are for all models except where noted)

THERMOMETER

Measuring

Temperature

Range:

OS551: 0°F to 750°F (–18°C to 400°C)

OS552: 0°F to 1000°F (–18°C to 538°C)

OS553: 0°F to 1600°F (–18°C to 871°C)

OS554: 0°F to 2500°F (–18°C to 1371°C)

Accuracy @ 24°C or 75°F

Ambient Temperature and at emissivity of 0.95 or greater:

±1% of reading or

3°F whichever is greater

Distance to Spot Size Ratio:

Display Repeatability:

Display Resolution:

Display Response Time:

10:1 (Figure 3-4)

20:1 (Figure 3-5)

30:1 (Figure 3-6)

± (1% rdg + 1 digit)

1°F or 1°C

250 msec

60:1 (Figure 3-7)

40:1 (Figure 3-8)

68:1 (Figure 3-3)

Spectral Response:

Operating Ambient Temperature:

Main Electronics:

8 to 14 microns

32°F to 122°F (0°C to 50°C)

Sensor Head 32°F to 122°F (0°C to 50°C)

Sensor Head with OS550-WC 32°F to 185°F (0°C to 85°C)

Operating Relative Humidity:

Display:

95% or less without condensation

Backlit LCD dual display

Power Requirements:

Main Electronics

Housing

7-24 Vdc @ 100 mA

Plastic ABS,

IP65, NEMA 12 & 13 rated

7-1

7

Specifications

Emissivity:

Calculated Temperature

Values:

Ambient Target

Temperature Compensation:

RS-232 Output (for personal computers and serial printers):

RS-232 Cable:

Power/Analog Output Cable:

Sensor Head Cable

Alarm:

Data Storage:

Dimensions:

Main Electronics:

Sensor Head:

Weight:

Main Electronics:

Sensor Head:

7-2

0.10 to 1.00 in 0.01 increments, set via keypad

Maximum (MAX), Minimum (MIN),

Average (AVG), Differential (dIF)

OS552:

OS553:

OS554: set and enabled via keypad set and enabled via keypad set and enabled via keypad

OS552:

OS553

OS554 standard standard standard

4800 bits per second, 8 bits of data,

1 stop bit, no parity

RJ12 to 25 pin D connector, Female

RJ12 Pin # 25 pin D connector Pin #

3

5

3

7

4 & 5 jumpered

6 & 20 jumpered

15 feet long; 4-conductor, shielded 22 AWG

15 feet long; 4-conductor, shielded 22 AWG

Set and enabled via keypad

All models: High alarm standard, with audible and visual indication

OS552, OS553: Low alarm standard, with

OS554 audible and visual indication

OS553, OS554 Up to 100 sets of data points on command. Each set of data consists of the temperature, the Emissivity and the high alarm value.

4.75" x 3.15" x 2"

1.62" dia. x 4.30"

2.2 kg. (1 lb.)

1.87 kg. (0.85 lb.)

Specifications

7

1 mV/degree C or F Analog Output:

Accuracy: ± 2 mV referenced to the temperature display

0-5 Vdc Analog Output:

Accuracy: ± 0.25% of full scale (Referenced to display reading)

Scaling:

Minimum Load:

Fixed (scaled to match full temperature range of model selected)

600 ohms

4-20 mA Analog Output:

Accuracy: ± 0.25% of full scale (Referenced to display reading)

Scaling:

Maximum Load:

Fixed (scaled to match full temperature range of model selected)

900 ohms @ 24 Vdc

7-3

7

Specifications

LASER SIGHT ACCESSORY (OS550-LS)

Wavelength (Color):

Operating Distance:

Laser Dot

Max. Output Optical Power:

630-670 nanometers (red)

6” to 75 ft.

<5mW at 75°F ambient temperature,

Class IIIa Laser Product

Safety Classification: Class 3A

Maximum Operating Current: 50mA at 5.5 V

FDA Classification: Complies with 21 CFR Chapter 1,

Subchapter J

Beam Diameter:

Beam Divergence:

Operating Temperature:

5 mm

<1mrad

32°F to 122°F (0°C to 50°C)

Operating Relative Humidity:

Power Switch:

Power Indicator:

Power:

Identification Label:

Danger & Certification Label:

95% or less without condensation

ON/OFF (slide)

Red LED

9 Vdc

Located on head assembly circumference

Located on head assembly circumference

7

7-4

Key(s)

Glossary of Key Strokes

Key(s) Functions

• Selects one of the following Display

Modes:

E , MAX, MIN, dIF, AVG, HAL, LAL,

AMB, PRN, or MEM.

• Enables/disables High and Low Alarms.

• Enables/disables Target Ambient

Temperature Compensation.

• Enables/disables sending data to the personal computer or serial printer.

• Stores temperature data on command.

• Displays previously stored data.

• Increments the data or value displayed.

• Turns on or off the backlighting (only in

MAX, MIN, dIF, or AVG Display

Modes).

Press and hold down the key & then press the key

• Decrements the data or value displayed.

• Changes the unit of measure from °F to

°C or vice versa (only in MAX, MIN, dIF, or AVG Display Modes).

• Allows you to go to the Diagnostic

Routine.

and keys pressed in rapid sequence

• Allows you to erase all 100 stored temperature data from the memory.

8-1

8-2

8

1

Glossary of Key Strokes

Notes

Appendix: How Infrared Thermometry Works

Thermal Radiation

Heat is transferred from all objects via radiation in the form of electromagnetic waves or by conduction or convection. All objects having a temperature greater than absolute zero (-459°F, -273°C,

0 K) radiate energy. The thermal energy radiated by an object increases as the object gets hotter. Measurement of this thermal energy allows an infrared thermometer to calculate the object’s temperature if the emissivity (blackness) is known. Generally, it is convenient to measure the amount of radiated energy in the infrared part of an object’s radiation spectrum.

Figure A-1 shows a block diagram of an infrared radiation thermometer. Energy from the object is focused by the lens onto the detector. As the detector heats up, it sends out an electrical signal, which in turn is amplified and sent to the circuitry of the thermometer. The thermometer software then calculates the temperature of the object.

LENS

OBJECT

AMPLIFIER

DETECTOR

OR

PYROMETER

CIRCUITRY AND

DISPLAY

SIGNAL OUTPUT TO SERIAL PRINTER

OR PERSONAL COMPUTER

Figure A-1. Infrared Thermometer Block Diagram

A-1

A


Blackbody

When thermal radiation falls on an object, part of the energy is transmitted through the object, part is reflected and part is absorbed. A blackbody is defined as an ideal object that absorbs all the radiation incident upon it. The best example of a real object that acts like a blackbody is a small hole drilled deep into a large opaque cavity. Thermal radiation entering the cavity is internally reflected and has little chance of escaping the cavity before it is fully absorbed.

Emissivity is defined as the ratio of energy radiated by an object to that of the energy radiated by a blackbody. By definition, the emissivity of a blackbody is 1. Most objects are considered gray

objects with an emissivity between 0 and 1. Various emissivities for common materials are shown in Appendix B.

Spectral Distribution

Objects radiate energy at different wavelengths, but not with constant intensity at each wavelength. Figure

A-2 shows the energy radiated by a blackbody at various temperatures as a function of wavelength. As a body is heated, the intensity of the radiated energy increases and the peak of the curve shifts towards the shorter wavelength end of the spectrum. The total area under a spectral distribution curve is proportional to the total energy radiated by the blackbody at a given temperature.

Relative emission from a blackbody versus wavelength.

The area under the curve corresponds to the total energy, and is proportional to the absolute temperature to the 4th power. The peak of the spectral distribution curve shifts to shorter wavelengths as the temperature increases.

Figure A-2. Blackbody Spectral Distribution

A-2


A

Wien’s Displacement Law describes the exact mathematical relationship between the temperature of a blackbody and the wavelength of the maximum intensity radiation.

λ

m

=

2.898

T where

␭ m

= wavelength measured in microns

T = temperature in Kelvin

Calculating Temperature

The net thermal power radiated by an object has been shown to depend on its emissivity, its temperature and that of the ambient temperature around the object. A very useful equation known today as the Stefan-Boltzmann Law has been shown both theoretically and empirically to describe the relationship.

I

=

εσ

(

T

4

− T a

4

)

I = thermal power in watts/meter 2

⑀ = Emissivity

␴ = 5.6703 x 10

-8 watts/meter

2 x K

4

(Stefan’s constant)

T = temperature of object in Kelvin

T a

= temperature of ambient surroundings in Kelvin

The infrared thermometer uses this equation directly in calculating the temperature of an object. The incident power is measured by the infrared detector. The emissivity of the object is determined by the user. The ambient temperature is measured by a sensor inside the thermometer. With all quantities known, the thermometer uses the Stefan-Bolzmann Law to calculate and output the temperature of the object.

A-3

A


Optics Field of View

Accurate measurement of temperature via infrared means depends strongly on the size of the object and the distance between the thermometer and the object. All optical devices (e.g. cameras, microscopes, infrared thermometers) have an angle of vision, known as a field of view or FOV, within which they see all objects.

In particular, the thermometer will measure a fixed proportion of the energy radiated by all objects within its FOV. The user must guarantee that the distance between the thermometer and the object is defined so that only that object fills the FOV of the instrument.

Referring to Figure A-3, Objects “X” and “Y” are within the FOV of the thermometer. The measured temperature would fall somewhere between the actual temperatures of the two objects. In order to measure the temperature of Object “X” accurately, Object

“Y” would need to be removed. In order to measure the temperature of Object “Y” accurately, the user would need to move closer to Object “Y” until it completely filled the FOV of the thermometer. Alternatively, the user could measure the temperature of Object “Y” with a thermometer with a smaller FOV.

A-4

Figure A-3. Field of View of a Thermometer/Transmitter

The distance-to-spot size ratio ( D ⁄

S

) defines the field of view (FOV).

Thus, a

D

⁄

S

= 10 gives you approximately a 1 foot spot size at a distance of 10 feet. For accurate spot size values, refer to the Field of

View diagrams shown in Figures 3-3 through 3-8.

Appendix: Emissivity Values

B

Table B-1 provides guidelines for estimating the emissivity of various common materials. Actual emissivity, especially of metals, can vary greatly depending upon surface finish, oxidation, or the presence of contaminants. Also, emissivity or infrared radiation for some materials varies with wavelength and temperature. To determine the exact

emissivities for most applications, follow the procedures in Appendix C.

Table B-1. Emissivity Table

Material Emissivity (

⑀)

Aluminum – pure highly polished plate . . . . . . . . . . . . . . . . . . . . 0.04 – 0.06

Aluminum – heavily oxidized . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.20 – 0.31

Aluminum – commercial sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.09

Brass – dull plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.22

Brass – highly polished, 73.2% Cu, 26.7% Zn . . . . . . . . . . . . . . . . . . . . . 0.03

Chromium – polished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.08 – 0.36

Copper – polished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05

Copper – heated at 1110°F (600°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.57

Gold – pure, highly polished or liquid . . . . . . . . . . . . . . . . . . . . . 0.02 – 0.04

Iron and steel (excluding stainless) – polished iron . . . . . . . . . . . . 0.14 – 0.38

Iron and steel (excluding stainless) – polished cast iron . . . . . . . . . . . . . . 0.21

Iron and steel (excluding stainless) – polished wrought iron . . . . . . . . . . . 0.28

Iron and steel (excluding stainless) – oxidized dull wrought iron . . . . . . . . 0.94

Iron and steel (excluding stainless) – rusted iron plate . . . . . . . . . . . . . . . 0.69

Iron and steel (excluding stainless) – polished steel . . . . . . . . . . . . . . . . . 0.07

Iron and steel (excluding stainless) – polished steel oxidized at

1110°F (600°C) . . . . . . . . . . . . . . . 0.79

Iron and steel (excluding stainless) – rolled sheet steel . . . . . . . . . . . . . . . 0.66

Iron and steel (excluding stainless) – rough steel plate . . . . . . . . . . 0.94 – 0.97

Lead – gray and oxidized . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.28

Mercury . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.09 – 0.12

Molybdenum filament . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10 – 0.20

Nickel – polished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.07

Nickel – oxidized at 1200°F – 2290°F . . . . . . . . . . . . . . . . . . . . 0.59 – 0.86

Platinum – pure polished plate . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05 – 0.10

Platinum – wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.07 – 0.18

Silver – pure and polished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.02 – 0.03

Stainless steel – polished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.07

Stainless steel – Type 301 at 450°F – 1725°F . . . . . . . . . . . . . . . 0.54 – 0.63

Tin – bright . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.06

Tungsten – filament . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.39

Zinc – polished commercial pure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05

Zinc – galvanized sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.23

B-1

B-2

B

Appendix: Emissivity Values

Material Emissivity (

⑀)

Asbestos Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.96

Asphalt, tar, pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.95 – 1.00

Brick – red and rough . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.93

Brick – fireclay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.75

Carbon – filament . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.53

Carbon – lampblack - rough deposit . . . . . . . . . . . . . . . . . . . . . . 0.78 – 0.84

Glass - Pyrex, lead, soda . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.85 – 0.95

Marble – polished light gray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.93

Paints, lacquers, and varnishes – Black matte shellac . . . . . . . . . . . . . . . . 0.91

Paints, lacquers, and varnishes – aluminum paints . . . . . . . . . . . . 0.27 – 0.67

Paints, lacquers, and varnishes – flat black lacquer . . . . . . . . . . . 0.96 – 0.98

Paints, lacquers, and varnishes – white enamel varnish . . . . . . . . . . . . . . 0.91

Porcelain – glazed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.92

Quartz – opaque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.68 – 0.92

Roofing Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.91

Tape – Masking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.95

Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.95 – 0.96

Wood – planed oak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.90

Appendix: Determining an Unknown Emissivity

C

1

In Appendix A, we showed how emissivity is an important parameter in calculating the temperature of an object via infrared means. In this section we discuss how to determine a specific emissivity value. If you know the material of the object, use Table

B-1 in Appendix B to look up its approximate emissivity. Most organic materials such as plastics, cloth, or wood have an emissivity of about 0.95. For this reason, we use 0.95 as the default emissivity setting in the OS551/OS552, OS553 and OS554 Thermometers.

For objects of unknown material or for very precise measurements, use one of the following methods to determine a specific emissivity value.

Method 1

1.

Measure and record the temperature of the object using a contact temperature probe such as a thermocouple or RTD.

2.

Aim the thermometer at the object.

3.

Adjust the emissivity until the temperature reading of the thermometer equals the temperature measured in Step 1.

Method 2

1.

Heat the object (or at least a sample of the object material) on top of a heating plate to a known temperature. Make sure the thermometer and the air surrounding the heating plate are at the same temperature.

2.

Measure the temperature of the object material with the thermometer. Make sure that the object fills the FOV of the thermometer.

3.

Adjust the emissivity until the temperature reading of the thermometer equals the known temperature of Step 1.

C-1

C


Method 3

1.

Use this method to measure objects at temperatures below 500°F

(260°C).

2.

Place a large piece of masking tape on the object (or at least a sample of the object material). Allow time for the masking tape to reach the object temperature.

3.

Set the emissivity of the thermometer to 0.95. Use the thermometer to measure and record the temperature of the masking tape - Area

‘A’ in Figure C-1. Make sure that the area of the object covered with masking tape fills the FOV of the thermometer.

Area 'A'

Target

Area 'B'

Target

Figure C-1. Determining Emissivity

4.

Aim the thermometer at Area ‘B’ as shown in Figure C-1 Make sure that Area ‘B’ is as close as possible to Area ‘A’.

5.

Adjust the emissivity of the thermometer until the temperature reading equals the temperature found in Step 3.

C-2


C

Method 4

1.

Paint a sample of the object material with flat black lacquer paint.

2.

Set the emissivity to 0.97 and measure and record the temperature of the painted portion of the sample material - Area ‘A’ in Figure

C-1. Make sure that the painted area of object material fills the

FOV of the thermometer.

3.

Aim the thermometer at another spot on the target - Area ‘B’ in

Figure C-1.

4.

Adjust the emissivity of the thermometer until the temperature reading equals the temperature found in Step 2.

Method 5

1.

Use this method where practical to measure objects at temperatures above 500°F (260°C).

2. Drill a 1.5” (35 mm) diameter hole in a sample of the object material to a depth of 5” (127 mm). This hole closely resembles a blackbody (refer to Appendix A).

Drilled out

Area 'A' Target

Area 'B' Target

Figure C-2. Determining Emissivity with a Drilled Hole

3.

Set the emissivity to 0.97 and measure and record the temperature of the hole in the sample material - Area ‘A’ in Figure C-2. Make sure that the hole fills the FOV of the thermometer.

4.

Aim the thermometer at another spot on the target as close as possible to Area ‘A’ (Area ‘B’ in Figure C-2).

5. Adjust the emissivity of the thermometer until the temperature reading equals the temperature found in Step 3.

C-3

ADDENDUM ADDENDUM TO OS550/OS550-BB MANUAL

Manual No.2830 REV.2/1999

IMPORTANT CONSIDERATIONS BEFORE INSTALLATION

Follow all safety precautions and operating instructions outlined in this addendum and your OS550 Series manual.

- - - - - - - - - - - - - - - - - - - - - - - - - SYMBOL KEY - - - - - - - - - - - - - - - - - - - - - - - -

CAUTION:

Refer to accompanying documents. Ref. ISO 3864 NO. B.3.1

DIRECT CURRENT ONLY:

REF. IEC 417, NO. 5031

- - - - - - - - - - - - - - - - - - - - - - - - - CAUTION - - - - - - - - - - - - - - - - - - - - - - - - - - -

Section 3.2 How to Power the Thermometer

• Only experienced personnel should install and make electrical connections to the thermometer.

• Power must be disconnected before making any electrical connections.

• The power supply used to power the thermometer should be VDE or

UL approved with the following ratings: Power: 7-24 Vdc @ 80 mA. Overload

Protection: Current limited to 500 mA.

• There is only one fuse in the OS550. Disconnect power before replacing the fuse.

The fuse must be replaced with one of identical size and rating. Fuse

Specifications: 125 mA/250 Vac, Time-lag, 5 x 20 mm with UL and/or VDE

Approvals such as Wickmann No. 19195-028.

• All connections made to the thermometer should be made via a stranded wire, shielded cable, 24 AWG (min), such as OMEGA Engineering’s

Model TX4 or TX8 series. Wiring requirements for this unit are Class II.

• Do not operate in flammable or explosive environments.

• This product is for professional use only. It is intended for use exclusively in laboratory or factory settings. Do not use it outdoors. Do not operate in flammable or explosive environments. There are no user serviceable parts inside this unit.

D-1

ADDENDUM TO OS550/OS550-BB MANUAL

Manual No.2830 REV.2/1999

A

- - - - - - - - - - - - - - - TYPICAL INSTALLATION SCHEMATIC - - - - - - - - - - - - - - -

GND

DC

POWER

SUPPLY

PROTECTED

GROUND SENSOR

HEAD

OS550

1 +PWR (RED)

2 -PWR (BLACK)

3 +O/P (WHITE)

4 -O/P (GREEN)

5 SHIELD (BARE) [DRAIN WIRE]

VOLTAGE O/P:

0-5 Vdc

CURRENT O/P:

4-20 mA

DIGITAL

VOLTMETER/

AMMETER

D-2

I-1

I

Index

A

Air Purge Collar ....................... 2-6

Alarms ........................... 3-14, 3-15

Ambient Target Temperature

Compensation ...................... 3-16

B

Backlighting Icon ...................... 1-3

Blackbody ........................ A-2, C-3

C

Computer:

Parameters:

Speed, Data, Parity,

Stop Bit ............................ 3-17

Personal, Hookup .............. 3-19

Program (IRP.EXE) ........... 3-20

Communications

Program (IRP.EXE) ............... 3-20

D

Diagnostic Program ................. 6-1

Differential Measurement ...... 3-7

Display

Icons:

ATC ........................ 1-3

Backlighting .......... 1-3

HAL ....................... 1-3

LAL ........................ 1-3

LCK ........................ 1-3

PRN ........................ 1-3

Modes:

AMB ....................... 1-3

AVG ....................... 1-3 dIF .......................... 1-3

E ...............................1-3

HAL ....................... 1-3

LAL ........................ 1-3

MAX .......................1-3

MEM ...................... 1-3

MIN ........................ 1-3

PRN ........................ 1-3

Display Problems ................ 6-1

E

Emissivity:

Adjusting ............................ 3-12

Definition ............................. A-2

Figuring out Unknown ...... C-1

Values ................................... B-1

Erasing Temperature Data ... 3-23

Error Codes ............................... 6-2

F

Field of View:

Diagrams ................ 3-4, 3-5, 3-6

Positioning ............................ 3-3

Fixed Point Monitoring over

Time Measurement ................ 3-8

G

Gray Bodies (Objects) ............. A-2

H

High Alarm Value, setting ... 3-14

I

Icons:

ATC ....................................... 1-3

Backlighting ......................... 1-3

HAL ........................................ 1-3

LAL ........................................ 1-3

LCK ........................................ 1-3

PRN ....................................... 1-3

Installing

Air Purge Collar ................... 2-6

Laser Sight ........................... 4-3

J

Jacks

RS-232 (RJ-12)...................... 3-19

K

Keypad, 4-position .................. 1-3

Keys:

▼ & °F-°C............................... 1-3

FUNC (Function) ................. 1-3

LOCK (Lock) ........................ 1-3

▲ & ❍-● ................................ 1-3

Key Strokes ............................... 8-1

L

Label Layout:

Danger & Certification ............

.....................Inside Back Cover

Laser Sight

Installing onto

Thermometer ...................... 4-3

Line of Sight ......................... 4-2

Power ... ................................ 4-3

Power Indicator LED ........... 4-2

Warnings and Cautions ...... 4-1

LCD, Backlighting ................. 3-12

Lens Cleaning ........................... 5-1

Low Alarm Value, setting .... 3-15

M

Mounting Flange ...................... 2-6

Mounting Nut .......................... 2-5

Mounting Bracket ..................... 2-5

Modes:

Real Time .............................. 3-9

Recall ................................. 3-25

Moving Surface Scan ............... 3-8

O

Optics ........................................ A-4

P

Parameters, reviewing .......... 3-26

PAS Code .................................. 6-2

Passive Operation .................. 3-24

Personal Computer

Hookup ................................. 3-19

R

Real Time Mode Block

Diagram .................................. 3-9

Recall Mode Block Diagram ... 3-25

RS-232 Jack (RJ-12) ................. 3-17

Index

I

S

Serial Printer Hookup ........... 3-18

Sleep Mode ............................. 3-24

Sleep/On Switch ...................... 3-3

Spectral Distribution .............. A-2

Spot Measurement ................... 3-7

Static Surface Scan ................... 3-7

Stefan-Boltzmann Law ........... A-3

Storing Temperature Data .... 3-22

T

Temperature Data:

Erasing .................................3-23

Storing ................................. 3-22

Thermal Radiation .................. A-1

W

Wein’s Displacement Law ..... A-3

Water Cool Jacket .................... 3-1

I-2

MADE

IN

USA

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of

25 months from date of purchase on the base unit and 13 months from date of purchase on Laser Sight Module.

OMEGA Warranty adds an additional one (1) month grace period to the normal product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product.

If the unit should malfunction, it must be returned to the factory for evaluation. OMEGA’s Customer Service

Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective it will be repaired or replaced at no charge.

OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of being damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control.

Components which wear are not warranted, including but not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,

OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by

OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF

ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WAR-

RANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive and the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic

Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY / DISCLAIMER language, and additionally, purchaser will indemnify

OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the

Product(s) in such a manner.

RETURN REQUESTS / INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE

RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR)

NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS).

The assigned AR number should then be marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.

FOR WARRANTY RETURNS, please have the following information available BEFORE contacting

OMEGA:

1. P.O. number under which the product was

PURCHASED,

2. Model and serial number of the product under warranty, and

3. Repair instructions and/or specific problems relative to the product.

FOR NON-WARRANTY REPAIRS, consult OMEGA for current repair charges. Have the following information available BEFORE contacting OMEGA:

1. P.O. number to cover the COST of the repair,

2. Model and serial number of product, and

3. Repair instructions and/or specific problems relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible.

This affords our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.

© Copyright 2001 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without prior written consent of OMEGA ENGINEERING, INC.

Danger and Certification Label

Label Location - refer to Section 4.1

DANGER

LASER RADIATION - AVOID DIRECT EYE EXPOSURE

®

LASER RADIATION DO NOT STARE INTO

BEAM OR VIEW DIRECTLY WITH OPTICAL

INSTRUMENTS. MAX. OUTPUT<5mW, WAVE

LENGTH 630-670nm, CLASS 3A LASER

PRODUCT CONFORMS TO IEC825-1:1993

MAX. OUTPUT 5mW, WAVE LENGTH 630-670nm, CLASS IIIa LASER

PRODUCT. COMPLIES WITH 21 CFR CHAPTER 1, SUBCHAPTER J.

AVOID

EXPOSURE

LASER

RADIATION

IS EMITTED FROM

THIS APERTURE

Warnings and Cautions - refer to Section 4.1

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at www.omega.com

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