Omega Products OS210-C4 Installation Manual

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MADE IN UNITED KINGDOM

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OS210-C4

IR Temperature Sensors

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It is the policy of OMEGA Engineering, Inc.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 accepts no liability for any
errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

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OS210-C4 series non-contact infrared sensors measure temperatures from -20°C to 500°C and
provide an RS485 Modbus RTU interface.

OS210-C4 SPECIFICATIONS

Temperature Range vs Field-of-View table

Field of View Model Number

2:1 OS211-C4

15:1 OS151-C4

Interface RS485 Modbus RTU
Accuracy ±1% of reading or ±1ºC whichever is greater
Repeatability ± 0.5% of reading or ± 0.5ºC whichever is greater
Emissivity 0.2 to 1.0
Response Time, t90 240 ms (90% response)
Spectral Range 8 to 14 μm
Supply Voltage 12 V DC nominal (6 - 13 V DC)
Supply Current 50 mA max.
Baud Rate 9600 baud *
Format 8 data bits, no parity, 1 stop bit *

Mechanical

Construction Stainless Steel
Dimensions 18 mm diameter x 103 mm long
Thread Mounting M16 x 1 mm pitch
Cable Length 1 m
Weight with Cable 95 g

environMental

Environmental Rating IP65
Ambient Temperature 0ºC to 70ºC
Relative Humidity 95% max. non-condensing

* Other congurations available upon request

The DP240 is a 320x240 pixel touch-screen terminal with a 3.5”colour TFT display. It allows the user to display
data from up to eight OS210-C4 sensors and configure each sensor individually. The configuration parameters
include emissivity setting, signal averaging, peak or valley hold processing and reflected energy compensation.

There are two versions available. Each one provides all of the features above, however, the enhanced
DP240-AR also provides analogue transmission for up to four sensors, plus two adjustable alarm
outputs per sensor for all eight sensors.

Field of View Model Number

30:1 OS301-C4
ø5mm @ 100mm OS801-C4

DP240 TOUCHSCREEN TERMINAL SPECIFICATIONS

Display Format LCD type TFT 320 x 240, 3.5” touch screen, Resistive
Supply Voltage 12 to 24 V DC
Power Consumption 8 W
Serial port EXP1 RS485 Modbus RTU interface for OS210-C4 Series sensors
Serial port COM2 RS485 / RS232 interface for second display (read only)
Outputs (DP240-AR only) 4 analogue outputs, 0 to 10 V DC, 16 programmable alarm

Mechanical

Construction Polycarbonate with gasket, transparent lid (PC) and quick release screws
Mounting Surface
Dimensions 140mm wide x 100mm tall x 44mm deep (DP240)

140mm wide x 100mm tall x 65mm deep (DP240-AR)

environMental

Environmental Rating IP54 (front), IP30 (housing)
Ambient Temperature Range 0°C to 45°C
Relative Humidity 35% to 95%, non-condensing

outputs,12/24 V DC, 700 mA, (3 A max. per block of 8 outputs).

3

accessorIes

1000

103

12

18

M16 x 1mm

Distance: Sensor to object (inches)

Distance: Sensor to object (mm)

11.9

45.2

78.6

0.5

1.8

3.1

0 19.7 39.4

0

11.9

0

500 1000

Spot Dia.

(inches)

Spot Dia.

(mm)

Spot Dia.

(inches)

Spot Dia.

(mm)

Distance: Sensor to object (inches)

Distance: Sensor to object (mm)

Spot Dia.

(inches)

Spot Dia.

(mm)

Distance: Sensor to object (inches)

Distance: Sensor to object (mm)

11.9

0.5

61.9

111.9

0.5

2.4

4.4

048

0

0

5.0

0.20

100

3.9

12.5

0.49

200

7.9

100 200

D:S 15:1D:S 2:1

Distance: Sensor to object (inches)

Distance: Sensor to object (mm)

11.9

28.6

45.2

0.5

1.1

1.8

0 19.7 39.4

0 500 1000

Spot Dia.

(inches)

Spot Dia.

(mm)

D:S 30:1

Sensor

BEST

GOOD

INCORREC

Background

Target greater
than spot size

Target equal to
spot size

Target smaller
than spot size

A range of accessories to suit different applications and industrial environments is available. These
may be ordered at any time and added on-site. The accessories consist of the following parts.
Fixed mounting bracket Adjustable mounting bracket Air purge collar
Laser sighting tool

optIons

The following options are available. Options are factory installed and must be ordered with the
sensor.
Air/water cooled housing Certificate of calibration Longer cable

optIcal cHart

The optical chart below indicates the nominal target spot diameter at any given distance from the
sensing head and assumes 90% energy.

OS211-C4 OS151-C4 OS301-C4 OS801-C4

InstallatIon

The installation process consists of the following stages:
Preparation Mechanical installation Electrical installation

Please read the following sections thoroughly before proceeding with the installation.

preparatIon

Ensure that the sensor is positioned so that it is focused on the target only.

4

T

Distance anD spot size

12.0

45.0

50.0 50.0

40.0

9.0

15.0

25.0 25.0

60° Rotation 60° Rotation

60° Rotation

9.0

48.0

Fixed Bracket Adjustable Bracket

2 x Mounting Holes M4 Clearance 2 x Mounting Holes M4 Clearance

9.0

24.024.0

Ø16.0

The size of the area (spot size) to be measured determines the distance between the sensor and
the target. The spot size must not be larger than the target. The sensor should be mounted so
that the measured spot size is smaller than the target.

aMbient teMperature

The sensor is designed to operate in ambient temperatures from 0°C to 70°C. For ambient tem­peratures above 70°C, an air/water-cooled housing will be required.

Avoid thermal shock. Allow 20 minutes for the unit to adjust to large changes in ambient tem­perature.

atMospheric Quality

Smoke, fumes or dust can contaminate the lens and cause errors in temperature measurement.
In these types of environment the air purge collar should be used to help keep the lens clean.

electrical interference

To minimise electromagnetic interference or ‘noise’, the sensor should be mounted away from
motors, generators and such like.

Wiring

Check the distance between the sensor and the Modbus Master. If necessary, the OS210-C4
sensor can be ordered with a longer cable attached.

poWer supply

Be sure to use a 12Vdc, (50mA max.) power supply.

mecHanIcal InstallatIon

All sensors come with a 1m cable and a mounting nut. The sensor can be mounted on brackets
or cut outs of your own design, or you can use the fixed and adjustable
mounting bracket accessories which are shown below. Note: The sensor must be grounded at only
one point, either the cable shield or the sensor housing.

5

air/Water cooleD housing

40.0

2119 63

103

M16 x 1mm

1/8 BSP water/air connections

1/8 BSP Air connection

25
OS210-APSW
(for OS211-C4)

50

OS210-APSN

(for OS151-C4, OS301-C4, OS801-C4)

20

29

40

The air/water cooled housing shown below allows the sensor to withstand high ambient temperatures.
It is equipped with two 1/8” BSP fittings. Water temperature should be 10°C to 27°C for efficient cool­ing. Chilled water below 10°C is not recommended. To avoid condensation, the air purge collar should
be used with the water-cooled housing. Water flow rate should not be more than 0.5 to 1.5 litres/min.

air purge collar

The air purge collar below is used to keep dust, fumes, moisture, and other contaminants away
from the lens. It must be screwed in fully. Air flows into the 1/8” BSP fitting and out of the front
aperture. Air flow should be no more than 5 to 15 litres/min.

Clean or ‘instrument’ air is recommended.

6

DP240-AR

+

-

Power Supply

12 VDC

OS210-C4 sensors with
DP240 touchscreen terminal

OS210-C4 Sensor #1

OS210-C4 Sensor #8

PWR-

RS485-

RS485+

PWR+RS-RS+

Power Supply

DP240

electrIcal InstallatIon

Panel cut-out
132 x 89 mm

-0/+1 mm

2-6 mm

OS210-C4 sensors
with Modbus Master

OS210-C4 Sensor #1

OS210-C4 Sensor #32

OS210-C4 sensors with
DP240 touchscreen terminal

OS210-C4 Sensor #1

OS210-C4 Sensor #8

Power Supply

12 VDC

+-

PWR-PWR+RS-RS+

12 VDC

++-

RS485-

RS485+

PWR-

PWR+RS-RS+

Modbus
Master

Analogue transmission &

alarm outputs (DP240-AR only)

-

EXP1 EXP1

Sensor Configuration

COM2

DP240

& Display

RS485-

RS485+

-

+

Optional DP240

or other Modbus

Master

(Display only)

7

DP240 CONNECTIONS

Power input
on M1 (12 to
24 VDC):

MODBUS master interface EXP1 on DB9:

Description OS210-C4

cable ident.

RS485 + RS+ 9

RS485 - RS- 4

RS485 GND PWR- 5

DB9 pin no.

MODBUS slave interface COM2 on DB25
(only applicable when using second
DP240-AR as display only repeater)

Description DP240 (1)

DB9 pin no.

RS485 + 9 24

RS485 - 4 25

RS485 GND 5 14

DP240 (2)
DB25 pin
no.

Alarm outputs Q1-16 on M2 (DP240-AR only):

Alarm 1 Alarm 2

Sensor 1 Q1 Q2
Sensor 2 Q3 Q4
Sensor 3 Q5 Q6
Sensor 4 Q7 Q8
Sensor 5 Q9 Q10
Sensor 6 Q11 Q12
Sensor 7 Q13 Q14
Sensor 8 Q15 Q16

Analogue outputs (0-10V) AQ1-4 on M3
(DP240-AR only):

AQ1 = Sensor 1, AQ2 = Sensor 2,

AQ3 = Sensor 3, AQ4 = Sensor 4

DP240 DISPLAY FUNCTIONS

Sensor list screen:

/

Single sensor and multiple sensor display
screen:

/

Unlock display

Edit contrast

Search for sensors

Move selected sensor up
in list

Move selected sensor down
in list

View selected sensor

View all sensors

Lock/Unlock display

View sensor list

8

View/edit sensor emissivity
setting

View/edit sensor reected
energy

View/edit sensor measurement
ltering and peak/valley hold
settings

View/edit sensor alarm settings

Acknowledge alarms

Filtering and peak/valley hold processing:

Enter average period and hold period by pressing
on their respective values. Select the required hold
mode from the list.

Apply settings to selected
sensor only

Apply settings to all connected
sensors

Exit without applying settings

Set units to ºC

Set units to ºF

Toggle between ºC and ºF

Press to toggle between single
sensor and multiple sensor
displays

Sensor status display:
N/C:Sensor is not connected
OK: Sensor is operating correctly
ERR: A communications error
has occurred
AL1: Alarm 1 is active
AL2: Alarm 2 is active
AL*: Alarm 1 and Alarm 2 are
active

Emissivity settings:

Press on emissivity value to manually edit, or
select a material from the list.

Apply settings to selected
sensor only

Apply settings to all connected
sensors

Exit without applying settings

Reected energy compensation:

To enable: press on reected temperature value
and enter required temperature. Press on enable.
To disable: press on disable.

Apply settings to selected
sensor only

Apply settings to all connected
sensors

Exit without applying settings

Alarms:

To set alarms, press on alarm temperatures and
enter required values. Select alarm mode from list.

Apply settings to selected
sensor only

Apply settings to all connected
sensors

Exit without applying settings

Reset alarms for selected
sensor only

Reset alarms for all connected
sensors

Display lock/unlock:

When the display is locked, sensor settings can be
viewed but not edited. To unlock the display, enter
the passcode by pressing on **** (default 1234),
then press the unlock button. To lock the display,
press the lock button. To change the passcode,
rst unlock the display, then press the change
passcode button.

Unlock display

Lock display

Change passcode

Change passcode screen:

To change the passcode: enter the new passcode,
conrm the new passcode, press the accept button.

Accept new passcode

Exit without changing passcode

9

modbus over serIal lIne

INTERFACE
Baud rate 9600
Format 8 data bits, No parity, 1 stop bit
Reply delay (ms) 20

SUPPORTED FUNCTIONS
Read register 0x03, 0x04
Write single register 0x06
Write multiple register 0x10
Mask write register 0x16

The list below includes all available addresses:
R = Read, W = Write, MW = Mask write

Address Length

(words)

0x00 1 MODBUS slave address (1 to 247) R/W *

0x02

2

0x06 1 Un-filtered object temperature R

0x08 1 Sensor temperature R

0x0A 1 Maximum temperature over hold period R

0x0C 1 Minimum temperature over hold period R

0x0E 1 Average temperature over hold period R

0x10 1 Filtered object temperature R

0x12 1 Reflected temperature R/W

0x14

0x16

0x18

0x1A

* Single register writes only. New address will not take effect until next power on.

1

1

1

1

Description R/W/MW

Sensor identification register
Bits 0..19 - Serial number
Bits 20..23 - Sensor type (8 = OS210-C4 sensor)
Bits 24..26 - Sensor field-of-view (0 = 2:1, 1 = 15:1, 2 = 30:1)
Bits 27..32 - Reserved

Sensor status register
Bits 0..1 - Reserved
Bit 2 - Hold processing on (1)/off (0)
Bit 3 - Hold peaks (1)/valleys (0)
Bits 4..6 - Reserved
Bit 7 - Reflected energy compensation on (1)/off (0)
Bits 8..15 - Reserved

Average period (1 LSB = 0.05 seconds)
Minimum 0.05 seconds, Maximum 60.00 seconds

Hold period (1 LSB = 0.05 seconds)
Minimum 0.05 seconds, Maximum 1200.00 seconds

Emissivity (1 LSB = 0.0001)
Minimum 0.2000, Maximum 1.0000

R

R/W/MW

R/W

R/W

R/W

Notes:

1. All temperatures are in tenths of degrees C

2. Writing to bits listed as reserved or unlisted registers could cause malfunction

3. All write and mask operations are saved to non-volatile memory

4. For further information please refer to http://www.modbus.org/specs.php

5. Use address 255 to communicate with any connected sensor. Use address 0 to broadcast to all connected
sensors (no response expected)

10

operatIon

Once the sensor is in position and the appropriate power, air, water, and cable connections are secure,
the system is ready for continuous operation by completing the following simple steps:

1. Turn on the power supply

2. Turn on the Modbus Master

3. Read / monitor the temperature

IMPORTANT

Be aware of the following when using the sensor:

• If the sensor is exposed to significant changes in ambient temperature (hot to cold, or cold to hot),
allow 20 minutes for the temperature to stabilise before taking or recording measurements.

• Do not operate the sensor near large electromagnetic fields (e.g. around arc welders or induction
heaters).

Electromagnetic interference can cause measurement errors.

• Wire must be connected only to the appropriate terminals.

MAINTENANCE
Our customer service representatives are available for application assistance, calibration, repair, and
solutions to specific problems. Contact our Service Department before returning any equipment. In
many cases, problems can be solved over the telephone. If the sensor is not performing as it should,
try to match the symptom below to the problem. If the table does not help, call Omega for further
advice.

Troubleshooting

Symptom Probable Cause Solution

No output No power to sensor Check power supply

Erroneous temperature Incorrect wire connection Check wire colour codes

Erroneous temperature Faulty sensor cable Verify cable continuity

Erroneous temperature Field of view obstruction Remove obstruction

LENS CLEANING

Keep the lens clean at all times. Any foreign matter on the lens would affect measurement accuracy.
Blow off loose particles (if not using the air purge accessory) with an air ‘puffer’.

11

WARRANTY/ DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and
workmanship for a period of 37 months from date of purchase. OMEGA’s WARRANTY
adds an additional one (1) month grace period to the normal three (3) year product
warranty to cover handling and shipping time. This ensures that OMEGA’s customers
receive maximum coverage on each product.

If the unit malfunctions, 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 having been 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 in which
wear is not warranted, include but are 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 the company 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 WARRANTIES INCLUDING ANY
WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The r emedies of
purchaser set forth herein are exclusive, and the total liability of OMEGA with
respect to this order, whether b ased on contract, w arranty, 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,
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.

or

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

RETURN REQUESTS/INQUIRIES

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
have the following information
available BEFORE contacting OMEGA:

1. Purchase Order 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.

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 2011 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, pho-

tocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole
or in part, without the prior written consent of OMEGA ENGINEERING, INC.

RETURNS, please

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

1. Purchase Order number to cover the
COST of the repair,

2. Model and serial number of the
product, and

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

consult OMEGA

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