Omega Products OS550-AP Installation Manual

OS550/OS550-BB Series

Industrial Infrared

Thermometer/Transmitter

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NOTE

i

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)
CD Software ( OS552, OS553, OS554) only (1)
User’s Guide (1)

Optional Accessories:

From the Technical Library of ____________________________________

Model No. Description

OS550-MN Mounting Nut
OS550-MB Mounting Bracket
OS550-AP Air Purge Collar
OS550-MF Mounting Flange
OS550-WC Water Cool Jacket
OS550-LS Laser Sight
PSS-12 Power Supply, 12V regulated

PSU93 24V Power Supply, unregulated

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
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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.

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.

ii

OS550 Series
Industrial Infrared Thermometer

This page is intentionally blank

TABLE OF

CONTENTS

OS550/OS550-BB Series

Industrial Infrared Thermometer

iii

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

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

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

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

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

2.8 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

iv

TABLE OF

CONTENTS

OS550/OS550-BB Series
Industrial Infrared Thermometer

Page

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

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

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

4.3 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

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

1-1

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" to
approximately 200'

• 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.

General Description

1

1-2

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.

Table 1-1. OS550 Series Industrial Infrared Thermometer Features

*or 3°F whichever is greater

Features

OS551 OS552 OS553 OS554

Accuracy* ±1% rdg ±1% rdg ±1% rdg ±1% rdg
Range 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)

Emissivity adjustable adjustable adjustable adjustable
Backlit Dual

standard standard standard standard

Display
Distance to

Spot Ratio
Differential

standard standard standard standard

Temperature
Min/Max

standard standard standard standard

Temperature
Average

standard standard standard standard

Temperature
High Alarm standard standard standard standard
Low Alarm – standard standard standard
Ambient Target

Temperature – standard standard standard
Compensation

RS-232 Output – standard standard standard
Data Storage – – standard standard
Last Temperature

standard standard standard standard

Recall

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

1-3

General Description

1

1.2.1 Display Details

Figure 1-1. Display and Keypad View

Table 1-2. Display Details

Key Description

➀

Display Mode displays one of the following:

E (Emissivity) HAL (High Alarm Setpoint)
MAX (Maximum Temperature) LAL (Low Alarm Setpoint - only on OS552/OS553/OS554)
MIN (Minimum Temperature) AMB (Ambient Target Temp - only on

OS552/OS553/OS554)

dIF (Differential Temperature) PRN (Print Data - OS552, OS553 and OS554 only)
AVG (Average Temperature) MEM (Store Temperature Data - only on OS553/OS554)

➁

Data associated with one of the Display Modes

➂

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

➃

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

➄

Main display - displays the current temperature

➅

Power On Lock / Enables or Disables alarms

➆

▲ for incrementing data; is for turning on/off the backlighting

➇

▼ for decrementing data; is for changing the units of measure from

°F to °C or vice versa

➈

Function key for scrolling through the display modes

➉

Display Icons

Ambient Target Temperature Low Alarm

High Alarm Print Data

MAX658

750

ATC

HAL
LAL

PRN

F C

LOCK

FUNC

F-C

▼

▼

-

2

1

10

9

8

3

4

5

6

7

1-4

1.2.2 Parts of the Thermometer/Transmitter

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.

Shown with optional mounting bracket,
OS550-MB and mounting nut OS550-MN

Sensor Head

General Description

1

NEMA Housing,
Keypad, Display and
Output Electronics
(OS550 Series)

OEM Style
Keypad, Display,
and Electronics
(OS550-BB Series)

2-1

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' 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.

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.

Installing the Infrared Thermometer

NOTE

Installing the Infrared Thermometer

2

2-2

2.2 Sensor Head Dimensions

Fig. 2-1. Sensor Head Dimensions

29.2
(1.15)

29.2
(1.15)

41.1
(1.62) DIA.

38.1
(1.50) DIA.

109.2

(4.30)

160.3

(6.31)

11⁄2x 20 THREAD

11⁄2x 20 THREAD

2-3

2.3 OS550 Display Electronics Dimensions

Fig. 2-2. Main Display NEMA Housing with

Mounting Brackets Dimensions

Installing the Infrared Thermometer

2

131.3

(5.17) TYP.

Ø 4.37 (0.172) MOUNTING HOLE
(4 PLACES)

50.0

(1.97) TYP.

2-4

Installing the Infrared Thermometer

2

2.4 OS550-BB Series Display Mounting Dimensions

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

Ø 5.16 (0.203) THRU TYP. (4 PLACES)
WILL FIT UP TO A
#10 SCREW OR BOLT

26.4

(1.04)

57.4

(2.26)

118.4
(4.66)

57.4

(2.26)

5.1

(.20) TYP.

31.0

(1.22)

26.4

(1.04)

91.4

(3.60)

2-5

Installing the Infrared Thermometer

2

2.5 Mounting Bracket Dimensions (OS550-MB)

2.6 Mounting Nut Dimensions (OS550-MN)

Fig. 2-4

Fig. 2-5

57.2

(2.25)

TYP. 2 PLACES

25.4

(1.00)

50.8

(2.00)

38.61

Ø (1.520)

3.18

R (.125)

22.23
(.875)

88.9

(3.50)

6.4

(.25) REF

12.7
(.50)

88.9

(3.50)

28.58

(1.125)

25.4

(1.00)

C

L

1 1/2-20-2B THRU MED. DIAMOND NURL

.020 x 45
CHAMFER
BOTH SIDES

o

2.00

3.18

R (.125)

.020 x 45
CHAMFER
BOTH SIDES

.250

Installing the Infrared Thermometer

2

2-6

2.7 Mounting Flange Dimensions (OS550-MF)

2.8 Air Purge Collar Dimensions (OS550-AP)

6.35

(.250)

38 (1.5) - 20 THREAD

6.35 (.250)
THRU TYP. (3 PLACES)

3 HOLES ON Ø 71.1 (2.80)
BOLT CIRCLE

TYP. 3 PLACES

120

Ø 89 (3.5)

Fig. 2-6

Fig. 2-7

51 (2.0) DIA.

38 (1.5) – 20 THREAD

1/8 N.P.T. TAP THRU

21.59

(.850)

3-1

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 50°C (122°F), 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 approx. 0.5 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.

Fig 3-1. Water Cool Jacket Dimensions

OS550-WC

Ø 70.4 (2.77)

63.5 (2.50)

Using the Infrared Thermometer/Transmitter

3

3-2

3.2 How To Power the Thermometer

3.2.1 OS550 Series Cable Connection

The OS550 Series thermometer comes with a built-in 4.5 m (15')
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

Output Cable Connections

3.2.2 OS550-BB Series Terminal Block Wire Connections

Figure 3-1

Model -MV -MA -V1
Analog

1mV/°C or °F 4 to 20 mA 0-5 VDC

Output
Connection (+) White Wire (-) Green Wire

Power Connection: 7-24 VDC@80Ma

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

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)

1

2

3

4

5

6

7

8

9

10

11

12

3-3

Using the Infrared Thermometer/Transmitter

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.

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.

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 key to increment the target emissivity.

Press the key to decrement the target emissivity.

OS550 SERIES KEYPAD PARTIAL VIEW

Display
Mode

Display

Icons

ON

SLEEP

Scrolls

Through

Display

Modes

SLEEP/ON SWITCH

FUNC

Field of View

Target

(ACCEPTABLE)

(UNACCEPTABLE)

Using the Infrared Thermometer/Transmitter

3

3-4

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

Figure 3-4. OS550 Series (-2 FOV)

7.0

.35" @ 24"

1.6

9mm @ 610 mm

.8

21

42

181

.9

22

4.0

101

0

3

16102 5

SPOT DIA.* (MM)

*SPOT DIAMETER MEASURED

AT 90% ENERGY

5.0

0

.61

1.5

1.0

3.0

SPOT DIA.* (IN)

DISTANCE: SENSOR TO OBJECT (FT)

DISTANCE: SENSOR TO OBJECT (M)

D:S = 68:1

3.3.1 Field of View Charts

3-5

Using the Infrared Thermometer/Transmitter

3

Figure 3-5. OS550 Series (-3 FOV)

Figure 3-6. OS550 Series (-4 FOV)

4.8"

1.0" @ 0" to 20"

2.5cm @ 51cm

1.2"

1.0"

2.5

6.0

4.0

8.0

10.0

12.2

1601208040

1.0"

1.8"

2.4"

3.0"

3.6"

4.2"

1' 2'

200

8'6'

0**

DISTANCE: SENSOR TO OBJECT (FT)

DISTANCE: SENSOR TO OBJECT (CM)

SPOT DIA.* (IN)SPOT DIA.* (CM)

*SPOT DIAMETER MEASURED

AT 90% ENERGY

D:S = 20:1

4'

244

3' 5' 7'

20"

Using the Infrared Thermometer/Transmitter

3

3-6

2.9

0.9" @ 0

1.9

22mm @ 0

1.2

1.0

31

26

48

75

0.9

0

3

1610

*SPOT DIAMETER MEASURED

AT 90% ENERGY

D:S = 60:1

5

5.0

0

1.0 3.01.5

SPOT DIA.* (MM)

SPOT DIA.* (IN)

DISTANCE: SENSOR TO OBJECT (FT)

DISTANCE: SENSOR TO OBJECT (M)

.45"

11.5

3"

SPOT DIA.* (MM)

A

*SPOT DIAMETER MEASURED

T 90% ENERGY

7.6

SPOT DIA.* (IN)

DISTANCE: SENSOR LENS TO OBJECT (in.)

DISTANCE: SENSOR LENS TO OBJECT (cm.)

15.2

6"

9" 12"

15"

.15"

.39"

.78"

1.17"

3.9

9.9

19.9

29.9

D:S = 40:1

22.9

30.5

38.1

0.9"

22

0

0

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

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

3-7

3

Using the Infrared Thermometer/Transmitter

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 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.

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.

• Static Surface Scan – Measures the temperature across a static
surface:

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

2. If necessary, adjust the emissivity.

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.

Using the Infrared Thermometer/Transmitter

3

3-8

• 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. If necessary, adjust the emissivity.
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.