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3.4

Alarm Setting

The unit provides 0-100% alarm setpoint adjustment. Here is an example
of an alarm setting:

• An OS137-3-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)

40 x (20-4)

[10.4mA = 

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

6

Summary of Contents for OS137 SERIES

Page 1: ...ontact Infrared Temperature Sensor Transmitter MADE IN omega com e mail info omega com For latest product manuals omegamanual info User sGuide Shop online at CAUTION This product is not intended for m...

Page 2: ...ged by the United Kingdom Office Toll Free 0800 466 342 TEL 33 0 161 37 29 00 FAX 33 0 130 57 54 27 e mail sales omega fr Germany Austria Daimlerstrasse 26 D 75392 Deckenpfronn Germany Toll Free 0 800...

Page 3: ...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 Sectio...

Page 4: ...ring 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...

Page 5: ...able is a multi conductor 24 AWG stranded wire with the rating of 600 VDC 205 C 401 F Teflon insulation Power must be disconnected before making any electrical connections The recommended power supply...

Page 6: ...he 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 re...

Page 7: ...ng Diagram Figure 2 2 Alarm Output Wiring Diagram Accessories Model No Description OS137 MB Mounting Bracket OS137 WC Water Air Cooling Jacket with Built in Air Purge Collar OS137 AP Air Purge Collar...

Page 8: ...on the target surface Then put back the End Cap Make sure the output load is within the product specification Figure 3 1 Optical Field of View Figure 3 2 Location of Emissivity Alarm Adjust and Alarm...

Page 9: ...ture 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 3 Atmospheric Quality Environments with smoke dust and fumes dirty...

Page 10: ...NURL 2 5 0 1 WIDE DIMENSIONS mm in 1 20 UNEF 127 5 0 1 83 m 6 ft 42 4 1 67 25 4 1 0 DIMENSIONS mm in 128 6 5 062 7 9 0 312 41 2 1 625 1 20 UNEF 9 5 3 8 1 20 UNEF BUILT IN AIR PURGE COLLAR APPLY CLEAN...

Page 11: ...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...

Page 12: ...rviceable parts inside 4 2 Operating the Laser Sight Accessory The laser sight accessory screws onto the front of the transmitter sensor head This accessory is only used for alignment of the transmitt...

Page 13: ...WITCH BATTERY PACK POWER SUPPLY OS137 Dimensions mm in OUTPUT 1 mW WAVELENGTH 630 670 nm CLASS II 2 LASER PRODUCT COMPLIES WITH FDA 21CFR 1040 10 EN60825 1 11 2001 LASER RADIATION DO NOT STARE INTO BE...

Page 14: ...mV F Output Load Requirements Min Load 0 to 5 Vdc 2 K Ohms Min Load 0 to 10 Vdc 4 K Ohms Max Load 4 to 20 mA Power Supply 4 20 mA Min Load 10 mV Deg 10 K Ohms Min Load K T C 100 K Ohms Operating Ambie...

Page 15: ...er Less than 5 mm Beam Divergence Less than 2 mrad Operating Temperature 0 to 50 C 32 to 122 F Operating Relative Humidity Less than 95 RH non condensing Power Switch ON OFF Slide Switch on the batter...

Page 16: ...ron 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 600 C 1112 F 0 7...

Page 17: ...soda 0 85 to 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 to 0 67 Paints lacquers and varnishes flat...

Page 18: ...OS137 Series Miniature Non Contact Infrared Temperature Sensor Transmitter 6 13 NOTES...

Page 19: ...therwise 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...

Page 20: ...ity Indicators Turbine Paddlewheel Systems Totalizers Batch Controllers pH CONDUCTIVITY pH Electrodes Testers Accessories Benchtop Laboratory Meters Controllers Calibrators Simulators Pumps Industrial...

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