Omega | OS-MINI and OS-MINI22 | Owner Manual | Omega OS-MINI and OS-MINI22 Owner Manual

Omega OS-MINI and OS-MINI22 Owner Manual
TM
User’s Guide
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OS-MINI
OS-MINI22
Infrared Temperature Sensors
omega.com info@omega.com
U.S.A.
Headquarters:
Servicing North America:
Omega Engineering, Inc.
Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
Tel: (203) 359-1660
Fax: (203) 359-7700
e-mail: info@omega.com
For Other Locations Visit omega.com/worldwide
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.
The OS-MINI Series is a range of miniature non-contact infrared temperature sensors with
separate electronics modules.
All models have an adjustable emissivity setting and are capable of measuring a wide variety
of target materials, including food, paper, textiles, plastics, leather, tobacco,
pharmaceuticals, chemicals, rubber, coal, and asphalt.
General-purpose OS-MINI models measure non-reflective non-metals or painted or coated
metals, at temperatures from -20°C to 1000°C.
OS-MINI22 models have a short measurement wavelength. They are ideal for measuring
reflective surfaces such as uncoated iron and steel, as well as many other high-temperature
applications. They are capable of measuring temperatures from 100°C to 2000°C.
The optional touchscreen interface provides temperature indication, alarms, sensor
configuration and data logging to MicroSD Card. The optional high-temperature sensing
head on general-purpose models may be used in ambient temperatures of up to 180°C
without cooling. The low-noise cable on high ambient temperature models is resistant to
interference from movement, so it is ideal for mounting on moving objects such as
robot arms.
A choice of optics is available to measure small or large targets at short or long distances,
and there is a choice of 4-20 mA, RS485 Modbus, and alarm relay outputs.
SPECIFICATION
OS-MINI
OS-MINI22
Temperature Range
See table of Model Numbers
Maximum Temperature
Span (-D-MA models)
Full temperature range (up to 1550°C)
Minimum Temperature
Span (-D-MA models)
100°C
Output
4 to 20 mA or RS485 Modbus
Field of View
See table of Model Numbers
Accuracy
± 1°C or 1%,
whichever is greater
Repeatability
± 0.5°C or 0.5%, whichever is greater
Emissivity Setting Range
0.20 to 1.00
Emissivity Setting Method
• -MA models without display: via two rotary switches
in electronics module
± 2°C or 1%,
whichever is greater
0.10 to 1.00
• -C4 models: via RS485
• -D models: via touch screen
Response Time, t 90
240 ms (90% response)
Spectral Range
8 to 14 μm
Supply Voltage
24 V DC ± 5%
Maximum Current Draw
100 mA
Maximum Loop Impedance
-MA models: 900 Ω (4 to 20 mA output)
Alarm Relays (-D models)
2 x Single Pole Changeover alarm relays rated
24 V DC, 1 A, isolated 500 V DC
2.0 to 2.6 μm
3
MECHANICAL
Sensing head
Electronics Module
Construction
Stainless Steel
316
Die-cast Aluminium
Major Dimensions
Ø18 x 45 mm
98(w) x 64(h) x 36(d) mm
Mounting
M16 x 1 mm
thread
Two M4 screws for wall mounting (see
diagram)
Cable Length (sensing head
to electronics module)
1 m (standard), up to 30 m (optional)
Weight with 1 m Cable
390 g (approx)
Cable Connections
Removable screw terminal blocks (see Connections).
Conductor size: 28 AWG to 18 AWG
Output Cable Gland
Suitable for cable diameters 3.0 to 6.5 mm
ENVIRONMENTAL
Sensing Head
Electronics
Module
(without touch
screen)
Electronics
Module (with
touch screen)
Environmental Rating
IP65 (NEMA 4)
IP65 (NEMA 4)
–
Ambient Temperature
Range
See table of
Model Numbers
0°C to 60°C
0°C to 60°C
Relative Humidity
Maximum 95%
non-condensing
Maximum 95%
non-condensing
Maximum 95%
non-condensing
CE Marked
Yes
Yes
Yes
RoHS Compliant
Yes
Yes
Yes
The OS-MINI series conforms to EMC Directive EN61326-1:2006 (Electrical equipment for
measurement, control and laboratory use – Industrial) as well as industrial standards for
electromagnetic immunity and emissions.
4
MODEL NUMBERS
The following combinations of ambient temperature range, optics, measured temperature
range, output and interface are available:
Series
Operating
Temperature
Range and
Optics
212 (2:1)
152 (15:1)
302 (30:1)
802 (close
focus)
OS-MINI
General
Purpose
(8-14 µm)
Sensing head:
60°C max
ambient
HA201 (20:1)
Sensing head:
180°C max
ambient
Electronics
Module
D
with touch
screen
(blank)
without
display
Output
MA
4-20 mA
C4
RS485 Modbus
D
with touch
screen
MA
4-20 mA
(blank)
without
display
C4
RS485 Modbus
Sensing head
(all models):
70°C max
ambient
(blank)
HT (0 to 500°C)
XT (0 to 1000°C)
(blank for D models)
(blank)
PT (100 to 400°C)
PT models only
OS-MINI22
High
Temperature
(2.2 µm)
LT (-20 to 100°C)
MT (0 to 250°C)
HT (0 to 500°C)
XT (0 to 1000°C)
(blank for D models)
SN151 (15:1)
SN251 (25:1)
SN751 (75:1)
SN801 (close
focus)
Measurement
Temperature
Range
SN151 models only
D
with touch
screen
(blank)
without
display
MA
(4-20 mA)
C4
(RS485 Modbus)
MT (250 to 1000°C)
HT (450 to 2000°C)
SENSING HEAD OPERATING TEMPERATURE RANGE
OS-MINI models: 0°C to 60°C
OS-MINI-HA201 models: 0°C to 180°C. They are available with -201 (20:1) optics only.
There is no need to supply cooling air or water, and the miniature sensing head is much smaller
than bulky, cooled sensors.
OS-MINI22 models: 0°C to 70°C
5
FIELD OF VIEW
OS-MINI - General Purpose
Spot Dia.
(inches)
0
Spot Dia.
(mm)
11.9
0
Distance: Sensor to object (inches)
Spot Dia.
(inches)
Spot Dia.
(inches)
Spot Dia.
(mm)
11.9
Spot Dia.
(inches)
Distance: Sensor to object (inches)
4
8
4.4
2.4
0.5
0
0
Spot Dia.
(mm)
Spot Dia.
(inches)
2.5
11.9
0
Spot Dia.
(mm)
Distance: Sensor to object (inches)
19.7
39.4
1.5
3.1
D:S 15:1
111.9
100
200
Distance: Sensor to object (mm)
-212
0.5
11.9
0
45.2
Spot Dia.
(mm)
0
61.9
500
1000
Distance: Sensor to object (mm)
-HA201
Distance: Sensor to object (inches)
3.9
7.9
0.5
0.20
0.49
11.9
5.0
12.5
0
78.6
500
1000
Distance: Sensor to object (mm)
-152
Distance: Sensor to object (inches)
19.7
39.4
0
1.8
1.1
0.5
D:S 20:1
36.9
39.4
1.8
0.5
D:S 2:1
61.9
0
19.7
D:S 30:1
28.6
45.2
500
1000
Distance: Sensor to object (mm)
-302
Diameter of target spot measured
versus distance from sensing
head at 90% energy. Sensors may
be used at longer distances than
these diagrams show. There is no
maximum measurement distance
in clean air.
100
200
Distance: Sensor to object (mm)
-802
OS-MINI22 - High Temperature
59.1
3.9
0.6
Distance: Sensor to object (inches)
118.1
8.5
Spot Dia.
(inches)
Spot Dia.
(inches)
Distance: Sensor to object (inches)
0
0
59.1
0.6
2.4
12
0
100
215
1500
3000
12
60
0
1500
Distance: Sensor to object (mm)
-SN251
Distance: Sensor to object (inches)
59.1
118.1
2.2
0.8
Spot Dia.
(inches)
Spot Dia.
(inches)
Distance: Sensor to object (inches)
0.6
0
0.6
12
20
0
1500
55
3000
Spot Dia.
(mm)
Spot Dia.
(mm)
D:S 75:1
6
135
3000
Distance: Sensor to object (mm)
-SN151
0
5.3
D:S 25:1
Spot Dia.
(mm)
Spot Dia.
(mm)
D:S 15:1
118.1
19.7
39.4
1.2
0.3
7.5
30
500
1000
12
0
Distance: Sensor to object (mm)
Distance: Sensor to object (mm)
-SN751
-SN801
OUTPUT AND INTERFACE
-MA
4 to 20 mA output, without display
-D-MA
4 to 20 mA output and two alarm relay outputs, with touch screen interface
-C4
RS485 Modbus output, without display
-D-C4
RS485 Modbus output and two alarm relay outputs, with touch screen interface
MEASUREMENT TEMPERATURE RANGE
OS-MINI - General Purpose
-LT
-MT
-HT
-XT
(blank)
-20
0
100
250
500
1000
°C
-MA models: Fixed e.g. -MT: 0°C @ 4 mA, 250°C @ 20 mA
-D-MA models: 4 to 20 mA output configurable within this range
-C4 models: Digital output, full temperature range
OS-MINI22 - High Temperature
-PT
-MT
-HT
100
250
400
450
1000 2000
°C
-MA models: Fixed 4 to 20mA output scale (e.g. -MT: 250oC @ 4mA,1000oC @ 20 mA)
-D-MA models: 4 to 20 mA output configurable within this range
-C4 models: Digital output, full temperature range
EXAMPLE: OS-MINI-HA201-D-MA
Operating
Temperature Range
and Optics
Electronics Module
Output
Measurement
Temperature Range
OS-MINI-HA201
-D
-MA
(blank)
Ambient temperature
0°C to 180°C (sensing
head), 20:1 optics
With touch screen
interface and two alarm
relay outputs
4-20 mA
output
OS-MINI -D models:
temperature range is
rescalable within the
limits: -20 to 1000 °C
7
EMISSIVITY ADJUSTMENT (-MA MODELS WITHOUT DISPLAY)
The emissivity setting on -MA models without touch screen display may be adjusted via two rotary
switches inside the electronics box. To adjust the emissivity setting:
Set the left switch to the first digit after the decimal point (0.1).
Set the right switch to the second digit after the decimal point (0.01).
To enter an emissivity setting of 1.00, set both switches to 0. If the selected emissivity setting is
lower than the minimum, the sensor will default to an emissivity setting of 0.95.
For example:
Left switch
Right switch
Emissivity setting
6
3
0.63
0
0
1.00
TOUCH SCREEN (-D MODELS)
The optional backlit touchscreen interface mounted in the lid of the electronics module
provides a large, bright display of the measured temperature, as well as options for full
configuration of the sensor. The graph view shows the history of the measured temperature.
In alarm conditions, the display changes color to provide an immediate and obvious alarm
indication. Alarm modes and levels can be configured via the touchscreen.
TOUCH SCREEN SPECIFICATIONS
8
Touch Screen
Display Format
2.83” (72 mm) resistive touch TFT, 320 x 240 pixels, backlit
Configurable
Parameters
Temperature range, temperature units, emissivity setting,
reflected energy compensation, alarms, signal processing,
Modbus address (-D-C4 models), date and time, data logging
Temperature Units
°C or °F configurable
Temperature
Resolution
0.1°
Alarm Configuration
Two alarms with adjustable level, individually configurable as HI
or LO. Alarm 2 can be set to target temperature or sensing head
internal temperature
Signal Processing
Average, peak hold, valley hold, minimum, maximum
User Interface
Default View
Temperature View
Displays a large indication of the measured temperature. The background
turns bright red when an alarm is activated.
Setting Temperature
Press “°C” to switch to °F and vice versa. The units are changed throughout the interface.
Selecting Displayed Temperature
Press the temperature display to select which reading is shown:
Filtered Temp
The measured temperature, with averaging and hold processing. This temperature is output
by the sensor on the 4 to 20 mA output (-MA models).
Average Temp
The measured temperature with averaging but without hold processing.
Unfiltered Temp
The unprocessed measured temperature.
MicroSD Card status.
This icon is displayed when a MicroSD card is inserted, and flashes when
data logging is in progress.
This icon is displayed when scheduled data logging is enabled and has yet
to begin.
List View
Displays a list of the measured temperatures, alarm state and data logging
state.
Filtered Temp: The measured temperature, with averaging and hold processing.
Unfiltered Temp: The unprocessed measured temperature.
Average Temp: The Unfiltered Temperature averaged over the period specified in “Output
Processing”.
Maximum Temp: The highest temperature measured during the hold period, with averaging.
Minimum Temp: The lowest temperature measured during the hold period, with averaging.
Sensor Temp: The internal temperature of the sensing head.
Reflected Temp: The reflected energy compensation temperature, as specified in “Emissivity and Compensation”.
9
Lock/Unlock
Prevents settings being changed via a four-digit numerical code.
The default password is 1234.
Change Password
Enter, confirm and save a new four-digit code.
Start/Stop Logging
GO
Manually begins or ends data logging (requires MicroSD Card, available
separately).
If Scheduled Start is enabled in Settings > Data Logging, then logging cannot
be started manually.
To manually start logging, you must first disable Scheduled Start.
STOP
Graph
Displays the recent history of the Filtered Temperature and the Sensor
Temperature. To scroll backwards and forwards in time, touch the graph and
drag it. The graph stores the most recent 24 hours of temperature data.
Reset Graph
Clears and restarts the graph.
Real-Time Scrolling View
Returns the graph to the real-time scrolling view, showing the most recent
measurements.
Acknowledge Alarms
Switches the relay outputs for triggered alarms to their normal, untriggered
state. The background of the Temperature View, List View and Graph View will
stay red, and the alarms will not be triggered again, until the alarms are reset
(see “Alarms” below). Alarms can be acknowledged when the display is locked.
Settings
Access the configuration parameters. Press Apply
to save the settings, or Exit to leave the screen
without saving.
If Settings icon is grey, the interface is locked.
See “Lock/Unlock”.
10
Settings
Date & Time
Change the date and time for data logging purposes.
The clock is reset when the power is switched off, unless a battery is fitted.
Output Processing
f(x)
AVERAGING PERIOD
Set the time, in seconds, over which the measured temperature is averaged.
Note: averaging prevents the sensor from following rapid temperature
changes. Minimum: 0 (no averaging). Maximum: 60.
HOLD MODE
Peak
The sensor holds the maximum temperature steady for the Hold Period. After
this, the sensor responds normally. If the sensor detects a higher temperature,
it holds this temperature steady for the Hold Period.
Valley
Similar to Peak Hold mode except that the sensor outputs the minimum
detected temperature steady for the Hold Period.
Off
Disables hold processing.
HOLD PERIOD
Set the time, in seconds, for the sensor to hold the temperature as above.
Minimum: 0 (no hold processing). Maximum: 1200.
Data Logging
Sample Period
The time, in seconds, between samples. Minimum: 1. Maximum: 86,400
(1 day).
Number of Samples
The number of samples to collect before logging stops. Minimum: 0
(continuous logging). Maximum: 86,400 (1 day of data if Sample Period = 1
second).
Enable Scheduled Start
The sensor begins logging at the Date and Time specified. Logging can also
be started and stopped manually.
Date and Time
The date and time for scheduled logging to start.
Emissivity and Compensation
Emissivity and Compensation
Enter the emissivity of the target. Target emissivity can be determined
experimentally, or estimated using an emissivity table. For more information,
contact Omega.
Enable Reflected Energy Compensation
If enabled, compensates for errors caused by reflected energy from hotter or
colder objects.
Reflected Temperature
Enter the temperature of the surroundings of the target for Reflected
Energy Compensation.
11
4 to 20 mA Output (-D-MA models)
Set the temperature range limits for the 4 to 20 mA output.
mA
Temperature at 4 mA
The lower temperature range limit.
Temperature at 20 mA
The upper temperature range limit.
Please note
The difference between the temperatures at 4 mA and at 20 mA must be at
least 100°C. The temperature at 20 mA must be greater than the temperature
at 4 mA.
Modbus Address (-D-C4 models)
The current Modbus address of the sensor is displayed. Enter a new address,
then press Apply to save it to the sensor. Cycle the power to use the new
address.
Minimum: 1. Maximum: 247.
Alarms
Configure the settings for Alarm 1 and Alarm 2 separately, and configure alarm
logging settings.
Manually Reset Alarms
If an alarm has been triggered, allows both alarms to be triggered again.
Alarms will not be triggered again until they are reset, either automatically or
manually.
Alarm settings
Alarm 1 and Alarm 2
Alarm Set Point
The temperature at which the alarm is triggered.
Hysteresis
The temperature difference between the Alarm Set Point and the reset
temperature. Hysteresis is only used when Automatic Reset is enabled. Please
see the Alarm Operation diagrams below for more information.
Minimum: 0°C (hysteresis disabled).
Filtered Temperature or Sensor Temperature (Alarm 2 only)
Select the temperature monitored by Alarm 2.
Alarm Type
High
The alarm is triggered when the temperature rises above the Alarm Set Point.
Low
The alarm is triggered when the temperature drops below the Alarm Set Point.
Off
The alarm is disabled.
12
Reset
Acknowledge
Automatic
The alarm is acknowledged and reset automatically when the temperature
reaches the reset temperature (see Hysteresis). It can also be acknowledged or
reset manually.
Manual
The alarm is acknowledged by pressing Acknowledge on the Temperature
View or List View, and reset by pressing Reset on the Alarms screen.
Reset
Alarm Logging
Alarm events can be logged to the MicroSD Card. Alarm log files and settings
are independent from Data Logging.
Log Trigger Time
The time that an alarm is triggered will be logged.
Log Data While Triggered
Data logging will start when an alarm is triggered. 1 sample is logged per
second. Logging stops when both alarms are reset.
Log Acknowledge Time
The time that the alarm is acknowledged will be logged.
Log Reset Time
The time that the alarm is reset will be logged.
ALARM OPERATION WITH HYSTERESIS & AUTOMATIC RESET
High Alarm with Automatic Reset
Low Alarm with Automatic Reset
Temperature
Temperature
Alarm Set Point
Hysteresis
Hysteresis
Alarm Set Point
Alarm triggered
Alarm reset
Time
Alarm triggered
Alarm reset
Time
The OS-MINI can be used as a standalone data logger.
-D models include a MicroSD card slot for data logging, which can be configured via the touch
screen interface. The user can select the sample rate and the number of samples to be taken
and schedule the data logging to start at a certain time.
With a 2 GB card, the user can store 28.4 million readings, which provides almost 1 year’s
worth of data at the fastest possible sample rate of 1 per second.
Data is stored on the MicroSD card in .csv format and can be viewed and edited easily using
spreadsheet software.
A MicroSD card with SD card adapter is available as an optional accessory.
The MicroSD card slot and battery holder are located on the touch screen circuit board in the
lid of the electronics module. Readings are time and date stamped using the sensor’s internal
clock. The clock is reset when the power is disconnected, or it will continue if the optional
battery is fitted.
13
DATA LOGGING SPECIFICATIONS (-D MODELS)
Data Logging Interval
1 to 86,400 seconds (1 day)
MicroSD Card
Max. capacity: 32 GB (not included)
Internal Clock Battery
1 x BR 1225 3V (not included)
Variables Logged
Target temperature, sensing head temperature, electronics
module temperature, max, min, average, emissivity setting,
reflected energy compensation temperature
File format
.csv
Configurable
Parameters
Sample period, number of samples, scheduled start date and
time
Modbus address range
1 to 247
USING THE OS-MINI AS A DATA LOGGER (-D MODELS)
1. Insert a MicroSD card into the holder on the circuit board inside the lid of
the electronics module.
2. To retain the date and time when the sensor is switched off, fit a battery to
the holder on the circuit board inside the lid.
3. Replace the lid and connect the sensor power supply.
4. To set the number of samples to be logged, the time period between
samples, and, if required, to schedule data logging to automatically start,
press Settings to access the Settings menu, then press Data Logging to
access the Data Logging options.
5. To save data logging settings, press Apply
GO
6. To manually start data logging, press Go on the Temperature View or List
View.
7. While logging is in progress, the Logging Icon flashes on the Temperature
View and List View.
8. To stop data logging, press Stop.
STOP
9. To transfer data to a computer, remove the MicroSD Card from the sensor,
insert the card into the SD Card adapter (supplied with MicroSD Card,
accessory model MSD) and insert the adapter into an SD Card reader.
14
INSTALLATION OF MICROSD CARD AND BATTERY (-D MODELS)
Back of touch screen, inside electronics module
MicroSD Card
Battery
(use 1 x BR 1225 3V)
Data is saved to the MicroSD Card in .csv format. This file format can be opened or imported by
spreadsheet software such as Microsoft Excel.
A new folder is created on the MicroSD Card for each day that data is logged.
A new log file is created every time logging is started. The start time is used as the file name.
DIMENSIONS & ACCESSORIES
Electronics Module
Sensing Head
98
86
64
Touchscreen
screen
Touch
(optional)
(optional)
72mm
mm(2.83”)
(2.83")
72
Ø 18.6 Ø 18
Mounting
holes: use M4
CSK screws
(supplied)
Mounting Nut
(included)
4
12
36
1000
45
13
Cable glands:
14 mm AF
1/8" BSP
air fitting
18
48
18
Standard length
Air Purge Collar
20
Thread
M16 x 1 mm
Ø 40
Removable spigot fitted to
type OS210-APSN, for use
with all optics except 2:1.
Ø 29
Not fitted to type
OS210-APSW
for -212 models.
36
18
25
50
15
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 following accessories are available
from Omega:
Mounting brackets (see above for dimensions): Allows rotational adjustment in one or two
dimensions. Model number: OS210-FBS (fixed), OS210-ABS (adjustable)
Air purge collar (see above for dimensions): The air purge collar is used to keep dust, fumes,
moisture, and other contaminants away from the lens. It must be screwed fully onto the sensing
head. Air flows into the 1/8” BSP fitting and out of the front aperture. Air flow should be 5 to 15
l/min. Clean or ‘instrument’ air is recommended. Model OS210-APSW is for use with sensors
with 2:1 optics. Model OS210-APSN is for use with all other models.
Laser sighting tool: When fitted to the sensor during installation or re-alignment, the laser
sighting tool pinpoints the centre of the measured spot. Model number: OS210-LSTS.
MicroSD Card: Stores logged data. For use with -D models. Includes SD Card adapter. Model
number: MINI-MSD.
Protective plastic window: Helps protect the lens from mechanical or chemical damage.
Quick and easy to replace. For use with general-purpose models only. Model number: OS210PW
Dual laser sighting bracket: Allows continuous laser sighting at the same time as using the
sensor. Model number: OS-MINI-LSF (fixed), OS-MINI-LSA (adjustable)
6-sensor touch screen hub (-C4 models): Multi-channel temperature display, configuration
and logging for up to 6 Modbus sensors. Model number: OS-MINI-TSD.
OPTIONS
The following options are available. Options are factory installed and must be ordered with the
sensor.
Calibration Certificate: Traceable certificate showing the measured temperature at three
points across the sensor’s temperature range. Model number: CAL-3-IR.
Extended Cable (30 m maximum total cable length): 1 m cable is supplied with each sensor
as standard. Extra cable can be added to this in increments of 1 m. Contact Omega for model
numbers.
16
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.
DISTANCE AND SPOT SIZE
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 sensing head withstands up to 60°C, 70°C, or 180°C, without cooling, depending on the
choice of model. See “Model Numbers” for more information.
Avoid thermal shock. Allow 20 minutes for the unit to adjust to large changes in ambient
temperature.
ATMOSPHERIC QUALITY
Smoke, fumes, dust or steam 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.
17
INTERFERENCE FROM MOVEMENT
The low-noise sensing head cable on OS-MINI-HA201 models is resistant to interference
caused by movement. The sensing head may be mounted on moving machinery such as robot
arms without affecting the accuracy of the measured temperature.
ELECTRICAL INTERFERENCE
The OS-MINI is tested to industrial standards for electromagnetic compatibility (EMC) as shown
in Specifications at the beginning of this manual.
To minimise electromagnetic interference or ‘noise’, the sensor should be mounted away from
motors, generators and such like.
POWER SUPPLY
Be sure to use a 24 V DC (100 mA) power supply.
MECHANICAL INSTALLATION
All sensors come with a 1 m cable and a mounting nut as standard. Longer cables are available
to order. The sensor can be mounted on brackets or cut-outs of your own design, or you can
use the fixed or adjustable mounting bracket accessories.
GROUNDING
Note: The sensor housing must be connected to earth at one point, either the housing
of the sensing head, the electronics module, or the output cable shield termination. To
avoid ground loops, please ensure the sensor is grounded at only one of these points.
WIRING (ALL MODELS)
Check the distance between the sensing head and the electronics module, and between the
electronics module and the instrumentation. If necessary, the sensor can be ordered with a
longer cable between the sensing head and the electronics module.
Do not extend or shorten the sensing head cable. The head and electronics module are
calibrated as a pair, and modifying the sensing head cable can affect the measurement
accuracy. Contact Omega for assistance.
The output cable from the electronics module should have an outer diameter between 3.0 and
6.5 mm, with conductors of size 28 to 18 AWG.
The terminal blocks in the electronics module may be removed from the circuit board for easy wiring.
Do not connect or disconnect the touch screen circuit board from the main circuit board while
the sensor is on.
WIRING (-C4 MODELS)
When connecting several sensors in a single Modbus network, all of the sensors should be
connected via a junction box to a single network bus cable, running from the furthest sensor to
the Modbus Master.
Up to 247 sensors may be connected to a single Modbus network. Each sensor must have a
unique Modbus address. The Modbus address may be changed via the touch screen interface
on -D models, or via Modbus.
To help prevent data reflections, please ensure the cable between each sensor and the main
network bus is as short as possible. The network bus should be terminated with a resistor of
120Ω between the RS+ and RS- wires. The PWR- wire of the bus should be connected to the
signal ground of the Modbus Master.
18
ELECTRICAL INSTALLATION
CONNECTIONS
-MA models
Removable
screw terminals
Relay outputs
(-D models)
OP+
OPPWRPWR+
NO1
COM1
NC1
NO2
COM2
NC2
x 0.01
x 0.10
Emissivity adjustment
switches (models
without display)
-MA models
Removable
screw terminals
+
-
Relay outputs
(-D models)
OP+
OPPWRPWR+
NO1
COM1
NC1
NO2
COM2
NC2
x 0.01
x 0.10
Emissivity adjustment
switches (models
without display)
24 V DC
100 mA
4 to 20
mA
A
Sensing head
Sensing Head Cable Colour Codes
Depending on the sensing head type, there will be 4 or 5
-C4the
models
wires, with
following combinations of colour codes:
Relay outputs
Colours
TP+
Yellow
Blue with white line
TP-
Green
White with blue line
TH+
VCC
Brown/Red
White
Removable
screw terminals
Blue
Sensing head
100 mA
White
Grey (OS-MINI22 only)
-C4 models
Relay outputs
(-D models)
+
-
GND
OP+
OPPWRPWR+
NO1
COM1
NC1
NO2
COM2
NC2
GND
-
When(-Dreconnecting
the sensing head to
models)
the electronics module, ensure the
shield drain wire is terminated
to the
4 to 20
A
inside of the cable gland.
mA
OP+
OPPWRPWR+
NO1
COM1
NC1
NO2
COM2
NC2
Terminal label
Always turn off the power
+ 24before
V DC
modifying electrical connections.
Removable
screw terminals
Sensing head
Modbus
Master
RSRS+
+
GND
Sensing head
RSRS+
24 V DC
100 mA
24 V DC
100 mA
Modbus
Master
19
MODBUS OVER SERIAL LINE (RS485)
Interface
Baud rate
9600
Format
8 data, 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
Read/write
0x17
The following list includes all available addresses:
R = Read
W = Write (single, multiple or read/write)
MW = Mask write
Address
Length (words)
0x00
1
MODBUS slave address
0x02
2
Sensor identification register
Bits 0..19 - Serial number
Bits 20..23 - Sensor type
(12 = OS-MINI, 14 = OS-MINI22)
Bits 24..26 - Sensor field-of-view / temperature
range
For OS-MINI : 0 = 2:1, 1 = 15:1, 2 = 30:1
For OS-MINI-HA201 : 0 = 20:1
For OS-MINI22: 0 = x51-MT, 1 = x51-HT,
2 = 151-LT, 3 = 151-PT
Bits 28..32 - Reserved
R
0x06
1
Unfiltered 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
PCB temperature
0x14
1
Emissivity (1 LSB = 0.0001)
Minimum 0.2000, Maximum 1.0000
0x16
1
Reflected temperature
0x18
1
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
20
Description
R/W/MW
R/W*
R
R/W
R/W
R/W/MW
Address
Length (words)
0x1A
1
Average period (1 LSB = 0.05 seconds)
Minimum 0.05 seconds, Maximum 60.00
seconds
Description
R/W/MW
R/W
0x1C
1
Hold period (1 LSB = 0.05 seconds)
Minimum 0.05 seconds, Maximum 1200.00
seconds
R/W
0x1E
1
Temperature at 4 mA
OS-MINI: Minimum -20°C, Maximum 900°C
OS-MINI22: Minimum 100°C, Max 1900°C
R/W
0x20
1
Temperature at 20 mA
OS-MINI: Minimum 80°C, Maximum 1000°C
OS-MINI22: Minimum 200°C, Max 2000°C
R/W
0x22
1
Alarm 1 setpoint
Minimum -20°C, Maximum 1000°C
Minimum 100°C, Maximum 2000°C
R/W
0x24
1
Alarm 1 hysteresis
OS-MINI: Minimum 0°C, Maximum 1000°C
OS-MINI22: Minimum 0°C, Maximum 1550°C
R/W
0x26
1
Alarm 1 status register
Bit 0 – Relay triggered (R)
Bit 1 – Visible alarm active (R)
Bit 2 – Alarm triggered (R)
Bit 3 – Auto reset (1)/manual reset (0)
(R/W/MW)
Bit 4 – Alarm acknowledge (R/W/MW)
Bit 5 – Alarm reset (R/W/MW)
Bits 6..7 – Reserved
Bit 8 – High alarm (1)/low alarm (0) (R/W/MW)
Bit 9 – Alarm enabled (1)/disabled (0)
Bits 10..15 – Reserved
R/W/MW
0x28
1
Alarm 2 status register
Bit 0 – Relay triggered (R)
Bit 1 – Visible alarm active (R)
Bit 2 – Alarm triggered (R)
Bit 3 – Auto reset (1)/manual reset (0)
(R/W/MW)
Bit 4 – Alarm acknowledge (R/W/MW)
Bit 5 – Alarm reset (R/W/MW)
Bit 6 – Reserved
Bit 7 – Filtered object temperature
(1)/head temperature (0) (R/W/MW)
Bit 8 – High alarm (1)/low alarm (0) (R/W/MW)
Bit 9 – Alarm enabled (1)/disabled (0)
Bits 10..15 – Reserved
R/W/MW
0x2A
1
Alarm 2 setpoint
OS-MINI: Minimum -20°C, Maximum 1000°C
OS-MINI22: Minimum 100°C, Max 2000°C
R/W
0x2C
1
Alarm 2 hysteresis
OS-MINI: Minimum 0°C, Maximum 1000°C
OS-MINI22: Minimum 0°C, Maximum 1550°C
R/W
* Single register writes only. New address will not take effect until next power on.
21
MODBUS OVER SERIAL LINE - NOTES
1.
All temperatures are in tenths of degrees C
2.
Writing to 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)
OPERATION
Once the sensor is in position and the appropriate power, air and cable connections are secure, the system is ready for continuous operation by completing the following simple steps:
1.
Turn on the sensor power supply
2.
Turn on the connected instrumentation
3.
Read, monitor or log the temperature
IMPORTANT
Be aware of the following when using the sensor:
1.
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.
2.
Do not operate the sensor near large electromagnetic fields (e.g. around arc welders or
induction heaters). Electromagnetic interference can cause measurement errors.
3.
Wires must be connected only to the appropriate terminals.
VIEWING THROUGH A WINDOW
The sensor is capable of measuring the temperature of a target through a window made of a
material that is transmissive to infrared radiation at 8-14 microns (OS-MINI models) or 2.0-2.6
microns (OS-MINI22 models). The emissivity setting of the sensor should be adjusted to compensate for the presence of the window. Please contact Omega for more information on using
the sensor with a window.
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
Field of view obstruction
Remove obstruction
Erroneous temperature
(analogue output)
Output temperature scale
mismatch
Re-scale input temperature
range on measurement
instrument to match sensor
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’.
22
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. OMEGA’s WARRANTY adds an
additional one (1) month grace period to the normal two (2) 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 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. 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.
FOR NON-WARRANTY REPAIRS, consult
OMEGA 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.
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 trademark of OMEGA ENGINEERING, INC.
© Copyright 2018 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 the prior written consent of OMEGA ENGINEERING, INC.
Where Do I Find Everything I Need for
Process Measurement and Control?
OMEGA…Of Course!
Shop online at omega.com
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M5700/0818
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