Omega OS137A Series Bedienungsanleitung

User’s Guide

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OS137A SERIES

Miniature Non-Contact Infrared

Temperature Sensor/Transmitter

CAUTION! – This product

is not intended for medical

use or use on humans

OS137A Series Miniature Non-Contact Infrared

Temperature Sensor/Transmitter

Table of Contents

Section Page

Caution & Safety Information ................................................................. iii

Safety Warnings and IEC Symbols ....................................... .................. iii

Section 1 Introduction ............................................................................... 1

Section 2 Installation ................................................................................. 1

2.1 Unpacking ............................................................................................ 1

2.2 Electrical Connection .......................................................................... 2

Section 3 Operation .................................................................................. 3

3.1 Measuring Temperature ...................................................................... 3

3.2 Ambient Temperature ........................................................................ 4

3.3 Atmospheric Quality ........................................................................... 4

3.4 Alarm Setting ...................................................................................... 6

Section 4 Laser Sight Accessory ............................................................... 7

4.1 Warnings and Caution ......................................................................... 7

4.2 Operating the Laser Sight Accessory .................................................. 7

Section 5 Specifications ............................................................................ 9

5.1 General ................................................................................................. 9

5.2 Laser Sight Accessory ........................................................................ 10

Section 6 Emissivity Tables ..................................................................... 11

OS137A Series Miniature Non-Contact Infrared Temperature Sensor/Transmitter

Table of Figure

Figure Description Page

2-1 General Wiring Diagram .............................................................. 2

2-2 Alarm Output Wiring Diagram .................................................... 2

3-1 Optical Field of View .................................................................... 3

3-2 Location of Emissivity & Alarm Adjust and Alarm Switch ......... 3

3-3 Mounting Bracket, OS137-MB ..................................................... 4

3-4 Air Purge Collar, OS137-AP ......................................................... 4

3-5 Stainless Steel Housing ................................................................ 5

3-6 Water/Air Cool Jacket, OS137-WC .............................................. 5

4-1 Laser Sighting Accessory, OS137-LS ........................................... 8

4-2 Laser Warning Label.................................................................... 8

If the equipment is used in a manner not specified in this manual, the

protection provided by the equipment may be impaired.

The Installation category is one (1).

There is no user replaceable fuse in this product.

The output terminals of this product are for use with equipment (digital

meters, chart recorders, etc.) which have no accessible live parts. Such

equipment should comply with all the applicable safety requirements.

Do not operate the equipment in flammable or explosive environments.

The unit comes with a 1.82 m (6’) shielded cable for power and output

connections. The cable is a multi-conductor, 24 AWG stranded wire with the

rating of 600 VDC, 205ºC (401°F) Teflon® insulation.

Power must be disconnected before making any electrical connections.

The recommended power supply should be VDE or UL approved.

Rating:12-24 VDC @ 50 mA mininum power with overload protection.

The supply voltage to the transmitter should not exceed 24 VDC.

OS137A Series Miniature Non-Contact Infrared Temperature Sensor/Transmitter

CAUTION & SAFETY INFORMATION

This device is marked with international safety and hazardous symbols in

accordance with IEC1010. It is important to read and follow all the precautions

and instructions in this manual before operating or commissioning this device

as it contains important information relating to safety and EMC. Failure to

follow all the safety precautions may result in injury and/or damage to your

equipment.

CAUTION & SAFETY INFORMATION

IEC Symbol Description

Caution Symbol

Direct Current

Laser Symbol

iii

Introduction

NOTE:

The OS137A Series is a precision, miniature infrared transmitter. It measures

temperature via non-contact, and provides an analog output proportional to

the measured temperature. The OS137A Series is offered in three temperature

ranges: 0 to 100ºC (32 to 212ºF), -18 to 260ºC (0 to 500ºF) and -18 to 538ºC (0 to

1000ºF). The analog output is offered as 4 to 20 mA, 0 to 5 Vdc, 0 to 10 Vdc, 10

mV/degree C or F, or K type thermocouple.

The unit provides adjustable emissivity from 0.5 to 1.0, 10 to 1 optical field of

view, and field adjustable alarm output.

The super-compact design, 25.4 mm OD x 127 mm length (1.0” OD x 5.0” L)

is ideal to measure temperature in confined, and hard to reach places. The

Stainless Steel housing is NEMA-4 rated. The unit comes standard with a 1.82

m (6’) shielded cable.

SECTION 1 - INTRODUCTION

Remove the packing list and verify that you have received all your equipment.

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

Service at:

1-800-622-2378 or 203-359-1660. We can also be reached on the internet at

www.omega.com

email: [email protected]

When you receive the shipment, inspect the container and the equipment

for any signs of damage. Note any evidence of rough handling in transit.

Immediately report any damage to the shipping agent.

The following items are supplied in the box:

• The infrared transmitter, OS137A with the 1.82 m (6’) shielded cable.

• Two mounting nuts

• The User’s Guide

The following describes the ordering information:

OS137A – * – ** , where

- * means:

-1 : 0 to 100°C (32 to 212ºF) temperature range

-2 : -18 to 260ºC (0 to 500ºF) temperature range

-3 : -18 to 538°C (0 to 1000°F) temperature range

- ** means:

-MA : 4 to 20 mA current output

-V1 : 0 to 5 Vdc output

-V2 : 0 to 10 Vdc output

SECTION 2 – INSTALLATION

2.1 – Unpacking

The carrier will not honor any damage claims unless all

the shipping materials are saved for inspection. After

examination and removal of contents, save packing material

and carton in the event that reshipment is necessary.

Installation 2

NOTE:

-K : K type thermocouple output

-MVC : 10 mV/ºC output

-MVF : 10 mV/ºF output

For longer power/output cable, add suffix “xxFT” to the model part number.

The following table lists the optional accessories:

The shielded cable provides the power and output connections. Connect

the body of the OS137A to Earth Ground. Leave the shield disconnected

and insulated at the end of the cable. Fig 2-1 shows the wiring diagram for

different analog outputs. Fig. 2-2 shows alarm output connections.

2.2 – Electrical Connection

Apply DC power after making all the wiring connection

Accessories

Model No.

OS137-MB Mounting Bracket

Water/Air Cooling Jacket with Built-in Air Purge Collar

Air Purge Collar

Laser Sighting

Regulated 24 VDC (400 mA) Power Supply

NISTTraceable Calibration

OS137-WC

OS137-AP

OS137-LS

PSR-24S

CAL-3-IR

Description

Figure 2-1. General Wiring Diagram

Figure 2-2. Alarm Output Wiring Diagram

WARNING!

Connecting the Green alarm lead

to ground, or to any load exceeding

100mA, will result in damage to the

OS137A and void the warranty.

If the alarm output is not

being used, it must be left

disconnected and insulated

Introduction

Before starting to measure temperature, make sure the following check list is

met:

The power and output connections are made (Fig 2-1).

The target is larger than the optical field of view of the transmitter (Fig 3-1).

Use the Laser Sighting accessory (optional), to align the transmitter to the

center of the target area.

Remove the End Cap to get to the Emissivity Single Turn Pot (Fig. 3-2). Set

the Emissivity Pot based on the target surface. Then put back the End Cap.

Make sure the output load is within the product specification.

SECTION 3 – OPERATION

3.1 – Measuring Temperature

Figure 3-1. Optical Field of View

Figure 3-2. Location of Emissivity & Alarm Adjust and Alarm Switch

Figure 3-3. Mounting Bracket, OS137-MB

Operation 3

The transmitter can operate in an ambient temperature of 0 to 70°C (32 to 158°F)

without any water cool jacket. It can operate from 0 to 200°C (32 to 392°F) with

the water cool jacket accessory, OS137-WC (Fig 3-6 & 3-7). It can operate up to

110°C (230°F) with air cooling.

There is a warm up period of 1 to 2 minutes after power up. After the warm up

period, temperature measurement can be made.

When the ambient temperature around the transmitter changes abruptly, the sensor head

goes through a thermal shock. It takes a certain amount of time for the sensor head to get

stabilized to the new ambient temperature. For example, it takes about 30 minutes for the

transmitter to stabilize from the 25°C to 50°C (77°F to 122°F) ambient temperature.

3.2 – Ambient Temperature

Environments with smoke, dust, and fumes dirty up the optical lens, and cause

erroneous temperature readings. To keep the surface of the optical lens clean, the

air purge collar accessory is recommended, OS137-AP (Fig 3-4).

The following figures show the Mounting Bracket (OS137-MB), Air Purge Collar

(OS137-AP), Stainless Steel Housing and Water/Air Cool Jacket (OS137-WC),

with built-in air purge collar.

3.3 - Atmospheric Quality

Figure 3-4. Air Purge Collar, OS137-AP

Figure 3-5. Stainless Steel Housing

Figure 3-6. Water/Air Cool Jacket, OS137-WC

Operation

The unit provides 0-100% alarm setpoint adjustment. Here is an

example of an alarm setting:

• An OS137A-3-MA (4/20 mA output), the alarm is to be set at 204°C

(400°F) temperature.

• Connect the alarm output as shown in Fig. 2-2.

• Remove the End Cap to get to the Alarm Switch and the Alarm Adjust

(Fig. 3-2).

• Set the Slide Switch on the main board to the Alarm position (2).

• Measure the analog output, and adjust the Alarm Potentiometer

until the output reads 10.4 mA which is 40% (204°C, 400°F) of the

temperature range -18 to 538°C, (0 to 1000°F)

[10.4mA = 40 x (20-4) /100 + 4]

• Set the Alarm Slide Switch back to the Real Time position (1).

• If the temperature reading is below the alarm setpoint, the Alarm

Output stays low, otherwise it goes high (Alarm Condition).

• The Alarm Output can drive an external mechanical relay.

Operation 3

3.3 - Atmospheric Quality

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