AST A250+ PL/TL/Video BT User manual

AST - Accurate Sensing Technologies
188A, B-169 (Part), B-188 (A),
Road No. - 5, Mewar Industrial Area, Udaipur - 313003 (Rajasthan) INDIA
Phone : [phone]
Email : [e-mail]
AST A250+/A450+ PL/TL/Video BT
USER MANUAL
Non-contact Infrared Pyrometers
We measure accurate temperature in extreme conditions
Accurate Sensing Technologies

Index
1. Chapter - 1
General information
2. Chapter - 2 ....................................................................................................................... 2
Introduction
2.1 Product Key Features, Application and Range
2.2 Technical specification
2.3 Optics
3. Chapter - 3 ....................................................................................................................... 5
Basics & Installation of Pyrometer
3.1 Basics of Infrared temperature measurement of an object
3.2 Installation
3.3 Location Selection
3.4 Mechanical Accessories
3.5 Electrical Installation
4. Chapter - 4 ....................................................................................................................... 13
Setting at the Instruments
4.1 Operation
4.2 Key Descriptions
4.3 Adjustable Parameters
4.4 Other Parameters
5. Chapter - 5 ....................................................................................................................... 17
Software installation
4.1 Installation
4.2 Parameters in main screen
6. Chapter - 6 ....................................................................................................................... 24
Android Application Software
6.1 Installation Process
6.2 Communication
6.3 Operation
6.4 Datalogging & Online graph
7. Chapter -7 ....................................................................................................................... 28
Maintenance
8. Chapter - 8 ....................................................................................................................... 29
Serial communication protocol
9. Appendix B ....................................................................................................................... 34
10. Appendix C ....................................................................................................................... 35
....................................................................................................................... 1
Accurate Sensing Technologies

Congratulations on choosing this high quality and highly efficient AST pyrometer for non contact temperature
measurement.
Please read this user manual carefully, step by step, including all notes of security, operation and maintenance
before installing the pyrometer. This manual contains all the necessary instructions for set up and operation of the
pyrometer. This section provides an overview about important safety regulations.
Some Important Safety Regulations Given Below
1. Safety Precaution
Each person working with pyrometer must read the user manual before operation. The pyrometer has only to
be used for the purpose described in manual. The pyrometer works only with a potential free low voltage of range
24VDC. This voltage is not harmful for user. The pyrometer may contain harmful material and hence it should not be
disposed of with normal waste.
2. Packaging and Storage
Always use a shock proof package for shipment of pyrometer. It should be sealed to protect it against humidity.
Also protect the lens of pyrometer with cover. They should be stored at the temperature range from -20°c to 70°c.
3. Limit of Liability and Warranty
All general information and notes for handling, maintenance and cleaning of this instrument are offered
according to the best of our knowledge and experience.
AST reserves the right to revise this document and to make change from time to time in the content hereof without
obligation to notify any person or persons of such revisions or changes
AST instruments have a warranty of two year from the invoice date. This warranty covers manufacturing defects and
faults which arise during operation only if they are the results of defects caused by AST.
AST does not accept liability for any damages or losses which might occur, including consequential damages and
financial losses, as a result of use of the instrument.
4. Copyright
All rights reserved . this document may contain proprietary information and shall be respected as a proprietary
document to AST with permission for review and usage given only to the rightful owner of the instrument with which
this document is associated.
Chapter - 1
General Information
1
Accurate Sensing Technologies

Chapter - 2
Introduction
AST A250+/A450+ PL/TL/Video BT are specially designed highly accurate digital pyrometers to provide high
performance and low maintenance of non contact temperature measurement in demanding industrial
environment.
2.1 Application and Range
The AST A250+/A450+ PL/TL/Video BT pyrometers are especially designed for industrial purposes. They are
suitable for high temperature measurement ranging from 210°C to 3000°C.
These pyrometers have solid body in stainless steel housing, which provides high operation safety even in rough
industrial environment, and large variety of focusable optics which can be easily used in all industrial areas.
These pyrometers have OLED display which shows temperature and provides menu selection via
parameterizaion keys. AST A250+/A450+ PL/TL/Video BT have fast response time of 2msec. The RS-485 for long
distance communication between pyrometer & PC software Infrasoft. Response time, emissivity, sub-range and
peak picker selection can be preset ex-works or adjustable through available software.
The pyrometer temperature measurement method utilizes the fact that objects emit thermal radiation in an
amount that directly corresponds to their own temperature and surface emissivity.
The pyrometer sensor detects the amount of infrared radiation emitted by the measured object (target). The
infrared signal is analyzed and the temperature it represents is analyzed by built-in microprocessor. AST
A250+/A450+ PL/TL/Video BT work in 4-wire technology.
The applications in which AST pyrometers can be used are
üPreheating
üAnnealing
üTempering
üWelding
üForging
üHardening
üMelting
üSintering
üSoldering
üRolling
üBrazing
üNormalizing
Product Key Features,
Standard Item supplied with AST A250+/A450+ PL/TL/Video BT
üAST pyrometer
üConnection cable 12-core (length - 5 m)
üAST software CD
üManual
üCertificate of calibration
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2.2 Technical Specifications
Model A250+ PL/TL/Video BT A450+ PL/TL/Video BT
Temperature Range
(Analog sub-range adjustable)
Spectral Range
Photodetector Type
Distance to Spot Size Ratio
Emissivity (ε)
Response Time
Accuracy
Repeatability
Sighting Options
Analog Output
Digital Output
Operating Temp. Range
Storage Temp. Range
Adjustable Parameters and Features via Software/
Keypad
210°C….1350°C
250°C….1800°C
300°C....2500°C
350°C....3000°C
1.6 µm
InGaAs
75:1 (210°C….1350°C)
150:1 (250°C….1800°C)
300:1 (300°C….2500°C)
300:1 (350°C.... 3000°C)
0.1….1.0 adjustable
2 msec adjustable upto 10 sec
± 0.3% of the measured value + 1°C
0.1% of reading in °C + 1°C
Laser Pilot Light (PL) / Through The Lens (TL) / Video output
RS-485 (Isolated)
0°C…….70°C
0°C…..200°C (With water cooling jacket)
-20°C…70°C
Emissivity, Response Time, Clear Time(Peak Picker), Analog Output, Analog Scale (Sub Range),
Unit Of Temperature(°C/°F), Record feature, Match Temperature etc.
600°C….2500°C
1.0 µm
Si
300:1 (600°C….2500°C)
0-20mA, 4-20mA (User selectable)
Power Supply
Power Consumption
Laser Power
Protection Class
Housing
Isolation
Operating Humidity
Weight & Dimensions
12V to 28V DC with reverse voltage protection
Max 2.5 watt - PL/TL models
Max 3.5 watt - Video models
<1 m watt (Only PL Model)
IP65
Stainless Steel
Power supply, Digital output and Analog output are galvanically islolated against each other
10-95%, Non-Condensing Conditions
1200g
Dia= Ø56 mm; Length=185.5mm
Dimensions
Fig. 1 Dimensions of Pyrometers
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Relay Output Relay output with hysteresis 60V DC / 42V AC RMS, 0.4A
Model A450C+ PL/TL/Video BT
Pixles
Video Format
Video Output
Impedance
Image Sensor
Maximum Analog Video Cable Run
Cable Connection Type
Operating Temperature
1/4 " CMOS
Upto 40m Special Co-axial Cable Used
BNC
0°C ..... 65°C
640 x 480
PAL
CVBS
75R
2.3 Video Specifications

475 6.40 3.20 1.60
Spot Sizes(mm)
Focused working distances
WD (mm)
500
700
800
1000
1500
2000
3000
5000
A250+
210°C - 1350°C
(75:1)
6.70
9.40
10.70
13.40
20.00
26.70
40.00
66.70
A250+
300°C - 2500°C
350°C - 3000°C
(300:1)
3.40
4.70
5.40
6.70
10.00
13.40
20.00
33.40
A450+
600°C - 2500°C
(300:1)
1.70
2.40
2.70
3.40
5.00
6.70
10.00
16.70
2.3 Optics
measured. This heat radiation is passed through the lens sensor and then converted to an electrical signal. The
farther the measured object from the pyrometer, the larger the area that will be measured.
Table 1 :Some fixed optics focus is as below
The pyrometer measure temperature by receiving heat radiation from the object whose temperature has to be
Accurate Sensing Technologies
4
Adjusting the required measuring distance:-
To achieve the spot sizes mention in the table above required
measuring distance must be adjusted. This can be done between the
smallest and the biggest limit value. For releasing the optics has to be
turned anti clock wise. Then it can be pushed or pulled to find the
correct measuring distance. For fixing the optics has to be turned clock
wise.
Adjusting the measuring distance with the help of the table:-
The table mentions the minimum and maximum measuring
distance for each optics as well as serval other values. The length “L”
can we measured with a caliper. This length "L" can reach max. upto 14
mm.
Adjusting the measuring distance with help of the thru lens view
finder:-
The focusable optics is correctly adjusted to the required
distance, if the measuring object is shown as a sharp image in the view
finder . A circle marks the position of the measuring spot.
Adjusting the measuring distance with help of the laser targeting
light:-
On the focused measuring distance the laser has a smallest spot
size.
length “L”
Unlock
Anticlockwise
Lock
Clockwise
Length
L
Length
L
9000 120.00 60.00 30.00
14.00
13.20
8.70
7.40
5.70
3.50
2.40
1.40
0.50
0
13.60
12.70
8.50
7.20
5.50
3.40
2.30
1.30
0.50
0
Fig. 2 Adjusting Measuring Distance
A250+
250°C - 1800°C
(150:1)
1.60
1.70
2.40
2.70
3.40
5.00
6.70
10.00
16.70
30.00

Chapter - 3
Basics & Installation of the Pyrometer
3.1 Infrared temperature measurement of an object
Each and every object emit definite amount of infrared radiation and its intensity varies according to the
temperature of object. Wavelength of infrared radiation lies approximately between 0.7 to 14 µm depending on the
material and properties of object. Infrared radiations are sometimes also referred to as “heat radiations” depends
mostly on the material. This material dependent constant value is known as “emissivity”, have a look at appendix B
for emissivity values.
3.1.1 Emissivity (Ɛ)
Emissivity is the ratio of energy radiated from an object to the exterior and energy radiated from blackbody.
The emissivity varies with the surface condition of the object and also with temperature variation and wavelength. If
this value is not accurate, then the true temperature cannot be measured. In other words a variation or change in
emissivity will cause a change in the measurement.
If the value of emissivity low, your measured results may contain some errors due to interfering infrared
radiations form objects which are behind the target object like heating systems, fireclay brisk etc. Usually such type
of problems occurs while measuring very thin materials like glass, plastic etc or some reflecting surface.
This error can be reduced if the sensor is shielded from reflecting radiation sources and also by properly, carefully
installing the device.
By the application of Kirchhoff's law of thermal radiation “at thermal equilibrium, the emissivity of the body is
equal to its absorptivity (α)”. So for perfect black body, Ɛ is 1 while any real object would have Ɛ less than 1. Also the
transmissivity (т) and reflectivity (ρ) is zero. The sum of absorptivity, reflectivity and transmissivity is always 1.
α + ρ + т = 1
By emissivity factor materials can be categorized as
üMetals
üNon metals
üTransparent materials
3.1.2 Calculation of emissivity of target object
There are various methods to do so but one of most prominently used is Calculate the actual temperature of
target object using a RTD, Thermocouple etc. Measure the object's temperature by pyrometer and adjust emissivity
settings in pyrometer unless correct temperature value is reached. Hence correct emissivity is measured of the
target object.
3.2 Installation
3.2.1 Mechanical installation of pyrometer
After all preparations are completed you can install pyrometer. Installation of pyrometer depends on the type
of bracket you are using and the type of surface.
Basics of
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3.2.3 Viewing Angles
The pyrometer can be placed at any angle from the target object up to 30°.indicated in the below diagram.
Fig.3 Proper mounting of pyrometer
Fig. 4 Pyrometer Acceptable Viewing angles
Background
Best
critical
Incorrect
Pyrometer
Target greater than
spot size
Target equal to
spot size
Target smaller
than spot size
Acceptable
Angles
Pyrometer
Best
90°C to target
Good
30°C to 90°C target
Bad
0°C to 30°C target
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3.2.2 Distance of pyrometer from object
The desired spot size on the target will determine the maximum measurement distance and the focal length
of the optical module. To avoid wrong readings the spot size of target must contain entire field view of the
pyrometer. The pyrometer must be mounted so the entire field of view is the same or smaller than the desired target
size. This is indicated in the below diagram.

3.3 Location selection
Qualified operating person should do the installation. Location should be good enough so that pyrometer
should get continuous infrared radiation.
Pyrometer distance from object is according to below points:-
1. Pyrometer spot size should be small than object size.(read 3.2.2 & 3.2.3)
2. Know your pyrometer spot size according to point 2.3.
3. Pyrometer ambient temperature should be within 0° to 70°C (read 3.3.3).
3.3.1 Correct Positioning of the pyrometer
With pilot light (PL)
A laser targeting light will help to correct the position of the pyrometer. It is recommended that laser should
be switched off while measurement. It will increase the life of laser. To avoid measuring errors caused by a too big
spot size the pyrometer must be fixed in the correct measuring distance, so that the object under measurement fills
the spot size.
With through the lens sighting (TL)
In case of through the lens sighting a reticule circle marks the position of the measuring spot. This circle is
true-sided and parallax-free.
With composite Video output
In case of video output a reticle circle on the center of camera view marks the positioning of the measuring
spot. The camera view shows real temperature of the target and reticle on the center of the view.
Note: The laser spot (PL) / reticule circle (TL) is only for indication of measuring spot, not exactly shows the measuring
area.
3.3.2 Mounting of pyrometer
To install the pyrometer at the place of measurement a mounting support is supplied as an accessory, after
losing the clamp screws, pyrometer can be mounted correctly in the mounting clamp.
3.3.3 Ambient temperature
The allowed operation temperature for the pyrometer is 0°C to 70°C. Therefore if pyrometer is to be used
above 70°C upto 200°C water cooling jacket with built in air purge unit is used otherwise it may damage the
pyrometer. The ambient temperature is dependent on the temperature and flow rate of cooling water. Details of
water cooling jacket& air purge are given in point 3.4.1.
3.3.4 Atmospheric conditions
The pyrometer cannot receive the full infrared energy for the measurement if atmospheric conditions like
smoke, dust or steam are present and hence it result in measuring error. An air purge unit can be helpful to avoid
contamination such as dust and humidity on the lens. The air supplied should be at normal temperature with oil &
moisture free. The air purge generates an air stream shaped like a cone and blows particles from the lens area.
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Fig. 6
(Reference no: 8500-05)
Air Purge Unit
ŸAir pressure : < 0.5 bar
ŸAir consumption : 2...3 m³/h
ŸMetal : Aluminium
ŸWeight : 0.5 Kg
ŸDry, clean air (Oil and dust free)
3.4 Mechanical Accessories
ŸWater pressure : < 10 bar
ŸAir pressure : < 0.5 bar
ŸAir consumption : 2...3 m³/h
ŸAmbient temperature : < 200°C
ŸMetal : Stainless steel
ŸWeight : 3.0 Kg
3.4.1 Water Cooling Jacket
This accessory is very important in order to use pyrometer at higher
temperature. A normal pyrometer can withstand a temperature of 0-70°C. For
higher temperature applications the device must be used with water cooling
jacket upto 200°C.( for mechanical drawing refer Appendix C.)
Fig. 5 Water Cooling Jacket
(Reference no: 8500-09
3.4.2 Air Purge
This accessory is used to keep dust, moisture, airborne particle and
vapours away from the lens head so that correct sighting of target object can be
done. ( for mechanical drawing refer Appendix C.)
3.4.3 Adjustable mounting stand
This adjustable mounting stand will provide appropriate movement to
the pyrometer. ( for mechanical drawing refer Appendix C.)
Fig. 7 Adjustable Mounting Stand
(Reference no: 8000-07)
ŸMetal : Stainless Steel
ŸWeight : 0.9 Kg
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Fig. 8 Mounting Clamp
(Reference no: 8500-04)
ŸMetal : Stainless Steel
ŸWeight : 0.45 Kg
3.4.4 Mounting Clamp
Mounting clamp can be used to hold the pyrometer.(for mechanical
drawing refer Appendix C.) Fig. 8.
Fig. 9 Mounting Flange
(Reference no: 8500-07)
3.4.5 Mounting Flange

3.6 Electrical Installation
Fig. 17 Power Supply Unit
(Reference no: 9000-02)
24V DC (well stabilized ripple max 50mV).The input power supply is
110/230v AC. Check the polarity before connecting the device.
Device has following specifications
Power supply I/P : 100 - 240VAC, 0.35A
50/60 Hz
Power supply O/P : +24V DC, 0.625A
Fig. 16 12-Core Cable
(Reference no: 7002-02)
3.6.1 Power Supply
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3.5 Combination of Accessories
3.4.6 Mounting Plate
Fig. 10 Mounting Plate
(Reference no: 8500-08)
Fig. 11 Pyrometer with Mounting Clamp
Reference No. (8500-04)
Fig. 12 Pyrometer with
Mounting Flange (8500-07) + Air Purge (8500-05)
+ Water Cooling Jacket (8500-09)
Fig. 13 Pyrometer with
Air Purge (8500-05) + Mounting Clamp (8500-06)
Fig. 14 Pyrometer with
Mounting Flange (8500-07) + Air Purge (8500-05) Fig. 15 Pyrometer with
Mounting Clamp (8500-06) + Air Purge (8500-05)
+ Water Cooling Jacket (8500-09)
Mounting
Clamp(Pyrometer)
Pyrometer
Airpurge
Water cooling
Jacket
Mounting
Flange
Air Purge
Mounting Clamp
(Water Cooling Jacket)
Mounting
Flange
Air Purge
Air Purge
Mounting
Clamp
(Water Cooling Jacket)
Water Cooling Jacket

Fig. 19 12-pin Binder connector
Male Female
L
C
BA
J
K
G
H
M
F
E
D
LC
J
B
A
K
G
H
M
FE
D
Pin
A
G
C
D
F
H
M
J
K
B
Colour
Red
White
Blue
Pink
Black
Yellow
Violet
Brown
Green
Grey
Indication
24 V DC
Ground
D- (RS-485)
D+ (RS-485)
Relay Terminal 1
(-) 4-20mA / 0-20mA
(+) 4-20mA / 0-20mA
Short/Open both wires for laser
ON/OFF
Relay Terminal 2
Used for
Power supply
RS-485 communication
Analog current output
Laser ON/OFF
White Coaxial Cable CVBS Composite Video Analog Video Output
Table 2 : Color code & Pin specification for pyrometer connections
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3.6.2 Connector pin assignment on the bottom of the pyrometer
For connecting pyrometer with computer via connector pin (on the bottom of pyrometer) connection
diagram is shown as under .Different colors and their indication is also shown in the table 2. So connections need to
be done according to color, indication, used for particular purpose as in the table2.
Fig. 18 Connecting pyrometer (RS-485 Converted) with computer
RS-485 Connection
Pink
Blue
Ref. No.: 9000-01
Temperature Indicator
230V, AC
AST 12-core cable
AST Pyrometer with
Digital Output RS-485
White
Red
Violet
Yellow
GND
+24 V DC
19
4-20 mA(+)
20
(-)
12
11
Computer
AST Digital Cable RS-485 to
RS-232/
USB
Converter
Relay Terminal
Note : 1 Male - 12 pin binder connector is present on pyrometer side.
2. Female - 12 pin binder connector is present on 12 core cable side.

3.6.3 Power ON Pyrometer
1. Connect the 12-core cable with 12-pin connector of pyrometer.
2. Connect supply wire (Red(+), White(-)) of 12 core cable with 24V DC power supply.
3. Connect remaining wires as per your requirement (details given in table 2 above).
4. Provide insulation for not used end points of 12-core cable.
5. Switch ON 24V DC Power Supply, pyrometer is ready for the temperature measurement.
3.6.4 Converter RS-485 to RS-232
The pyrometer can communicate with PC usingr RS-485.
RS-485 is well suited for long distance transmission. Standard on PC
is RS-232, so a converter is used which converts RS-485 to RS-232.
9 8 7 6
5432 1
9876
5
4
3
21
Fig. 23 Serial Communication Cable Male/Female
(RS-232 Communication Cable)
Female
RS-232 Connector
Male
RS-232 Connector
Fig. 21 Converter RS-485 to RS-232
9000-03)(Reference no:
Fig. 22 RS-485 to RS-232 Connection
Ref. No.: 9000-01
Temperature Indicator
230V, AC
AST 12-core cable
AST Pyrometer with
Digital Output RS-485
White
Red
Violet
Yellow
GND
+24 V DC
19
4-20 mA(+) 20
(-)
12
11 1
2
3
4
5
Earth
D+
D-
Pink
Blue
5 4 3 2 1
9876
Female
RS-232 Connector
Ref. No.: 9000-03
Female
RS-232 Connector
*Serial Communication
Cable Male/Female
(RS-232 Communication
Cable)
Computer
Male
RS-232 Connector
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Fig. 25 Temperature Indicator
(Reference no: 9000-01)
Fig. 26 Display & Parameterizer P-
(Reference no: 9001-01)
120
3.6.6 Display Instrument
To display the measured temperature 7 segment digital
indicator is used. Display temperature according to 4...20mA
analog output. Device has following specifications:
Power supply I/P : 100 to 240 V, AC/DC
Analog I/P : 4….20 mA
Retransmission : 4….20 mA
Power supply O/P : 24V, DC
Display : 4 Digits
Alarm : 2
3.6.7 Display & Parameterizer
AST P-120 is a high precision LED indicator for non contact
temperature measurement. With indication of measured
temperature user can easily parameterize a connected AST digital
pyrometer without any PC.
Device has following specification:
Power supply : 100 – 240V, AC or 24V, DC
DC analog O/P : 0-20 mA or 4-20 mA
Digital interface : RS-232 or RS-485
Pilot light : Pilot light On/Off with keys
Alarm with Hysteresis : 2 Nos.
Fig. 24 Multi-Pyrometer Connection
Note: For 16 number of Multiple Pyrometer Communication,
Each pyrometer must have different address.
AST 12-core cable
AST Pyrometer with
Digital Output RS-485
Ref. No.: 9000-01
Temperature Indicator
230V, AC
White
Red
Violet
Yellow
GND
+24 VDC
19
4-20 mA
20
(-)
12
11
(+)
AST 12-core cable
AST Pyrometer with
Digital Output RS-485
Ref. No.: 9000-01
Temperature Indicator
230V, AC
White
Red
Violet
Yellow
GND
+24 VDC
19
4-20 mA
20
(-)
12
11
(+)
Pink
Blue
Pink
Blue
Ref. No.: 9000-01
Temperature Indicator
230V, AC
AST 12-core cable
AST Pyrometer with
Digital Output RS-485
White
Red
Violet
Yellow
GND
+24 VDC
19
4-20 mA(+) 20
(-)
12
11 1
2
3
4
5
Earth
D+
D-
Pink
Blue
5 4 3 2 1
9 8 7 6
Female
RS-232 Connector
Ref. No.: 9000-03
Female
RS-232
Connector
*Serial Communication
Cable Male/Female
Computer
Male
RS-232
Connector
3.6.5 Connecting Multiple Pyrometers
In order to connect multiple pyrometers (Multiple pyrometer
communication) to computer each pyrometer must have digital
output RS-485. Each pyrometer should be assigned a different
address. For connection assessment have a look on the diagram
below
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13
Chapter - 4
Setting at the instrument
User can power up the unit by using connection cable at 24V DC input. After power up sensor starts an
initializing routine for some seconds. After this the object temperature is shown in the OLED display.
Note : In TL and Video model laser indication, Red LED and laser ON/OFF switch are not available
4.1 Operation
The programming keys FUNC, UP and DOWN enable the user to set the device on-site. Normally, OLED shows
temperature or error. To view different parameter FUNC key is pressed repeatedly. To change values of parameters UP
& DOWN keys are used. After changing values in any parameter by UP & DOWN key finally FUNC key should be pressed
to save that value in device. If FUNC key is not pressed after changing parameter value than device will automatically
take the old value & device will start showing temperature. If any key is not pressed for more than 5 sec. than device
will automatically shows the temperature.
4.2 Key Description
Up Key:This key changes the options to the next available value in the upward order.
Down Key :This key changes the options to the next available value in the downward order.
Enter/Function Key :This key is used for various function selection.
Status Indication(GreenLED):under normal condition green LED glows continuously which indicates pyrometer is
working correctly. If this LED blinks (getting ON & OFF) Indicates something is wrong which may be due to any of the
following reasons
1. Target temperature is above the analog high range of pyrometer or target temperature is below the analog low
range of pyrometer
2. Internal temperature is above ambient temperature high range of pyrometer(70°C) or internal temperature is
below ambient temperature low range of pyrometer(0°C).
Laser Indication : When laser is ON (Red LED ON), Laser is OFF(Red LED OFF). User can operate laser by two methods:
Method 1. : By using green and brown wires
If Green and brown wires are short than red LED will glow which indicates laser is ON
If Green and brown wires are open than red LED will be OFF which indicates laser is OFF.
Method 2. : By using Laser ON/OFF key present on keypad.
User can also operate laser by using laser ON/OFF key but in this condition the green and brown wires should be open.
OLED Display
Down key
Laser Indication (RED LED)
Laser ON/OFF Key
Up Key
Status Indication
(Green LED)
Enter/Function Key
Fig. 27 For PL Model

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OLED Display
Parameters
Description
EMI
Emissivity
By pressing function key emissivity will be shown. It is the relationship
between the emissions of a real object and the emission of a black body
radiation source at the same temperature. For a correct measurement it is
necessary to adjust emissivity. Emissivity depends on the surface condition of
the material, the spectral range of the pyrometer and the measuring
temperature. Different material has different emissivity ranging from 0.1 to
1.0.user can change emissivity by up/down key on the instrument.
SP
Set Point
Instrument is equipped with a relay contact controlled by the measuring
signal. The turn on temperature of relay is adjusted within the measuring
range. The relay contact is “OPEN” below the adjusted value, it is “CLOSE”
above it.
HST
Hysteresis
(Hyst.)
The relay contact close when temperature exceeds the set point. It opens only
if the temperature falls below a value which consists of set point and the
adjusted hysteresis. It can be adjusted from 2° to 20°C.
Example : if set point value is 900°C and Hysteresis set to 10. Then relay operation
as below mentioned:
1. Relay contact OPEN below 910°C temperature.
2. Relay contact CLOSE above 910°C temperature.
3. Once relay contact CLOSED than relay contact is OPEN's when
temperature falls below 890°C.
ALO
Ana. Sub range
Lo
Analog sub-range is adjustable within the basic range, user can set lower
analog sub-range here.
AHI
Ana. Sub range
HI
User can set the analog sub-range higher value here. Minimum span between
lower & higher value is 51°C
AO
Analog Output
User can select the output from 4…20mA or 0…20mA
UNIT
Temp. Unit
User can select °C or °F unit.
ADD
Sensor Address
For communicating with pyrometer via software users have to give a address.
The address may be 1 to 255.
TAU
Response Time
The response time can be set from 2 msec to 10sec.
BD
Baud Rate
Select desired baud rate (4800, 9600, 19200 and 38400) according to
your MODBUS communication requirement.
Note: AST Infrasoft application communicates only at 19200 baud rate.
PIC
Peak Picker
The Peak picker can be switched ON –OFF by using up down key. If the peak picker
is switched on, the highest last temperature value will always be displayed and
stored.
This feature is particularly useful when object temperature is not uniform across
its dimension or pyrometer is not constantly viewing an object to be measured.
Peak Picker Function
When peck picker is ON, the picker menu is enabled for setting of the parameters
like Reset below temperature and Peak time.
4.3 Adjustable Parameters

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OLED Display
Parameters
Description
(a) RBT
Reset Below
Temperature
User can set RBT within the limit of pyrometer temperature sub range. This
function sets the temperature above peak action start.
(b) PT
Picker Time
When temperature is increased from RBT, it captures the peak in define
time period.That time period is known as picker time (PT).
The Time period is selectable in the range of (0.01Sec to 30 Sec.)
Note: at selection of 0.0 Sec, pyrometer works in peak picker mode
without time dependent.
OLED OFF
Time
OLED OFF Time
The User can set OLED OFF time from 1 min. to 30 min. or continue ON.
If user select OFF time as 1 min., then OLED display will turn ON till 1 min. and
after 1 min. OLED display will turn OFF(Only OLED display will turn OFF,
Pyrometer is ON.)
By pressing any key, OLED will resume again with display. If user select continue
ON option, then OLED display is continues.
IT
Internal
Temperature
It shows the internal temperature of pyrometer.
Ex. RBT : 750°C
Outer : 600°C
PT : 1 sec.
Enter / Function Key : This key is used for function selection and to save desired changes.
750
Temperature
Time (Sec.)
RBT
Outer 600
With Peak Picker
Without Peak Picker
PT PT

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MT
Match
Temperature
This parameter is used to match the known target temperature value to be
displayed by the pyrometer. After that below display will be shown.
Measured Temperature : This indicates target temperature.
Required Temperature : User can change and set required temperature by
simultaneously press UP and DOWN keys. Press Enter for confirmation. Now
pyrometer measured temperature will automatically set to your required
temperature.
Meaning of Massages on OLED display :
1. ε > 1.0 : If calculated emissivity of required temperature is greater than 1.0
than emissivity will not change, save in pyrometer and also the measured
temperature will not change.
2. ε < 0.1 : If calculated emissivity of required temperature is less than 0.1 than
emissivity will not change, save in pyrometer and also the measured
temperature will not change.
Note 1 : For MATCH TEMPERATURE parameter Peak picker should be OFF (PIC)
if suppose it is found ON than below shown massage will be displayed.
Note 2 : If any key is not pressed till 5sec. time duration the pyrometer will
automatically comes out of match temperature function and start displaying
target temperature.
4.4 Special Function (Match Temperature)
350.0 °C
MT : 350
Measured
Temperature
Required
Temperature
NO WORK
PICKER ON
ExT
Exposure Time
This parameter be used for only video output. The user can set the exposure value
to clear and improve the picture quality of the target body. This function is used to
set the exposure time value from 0 to 255. Exposure time value will be reflected in
the camera when the value is adjusted and saved.
4.4 Composite Video Baseband Signal (CVBS) Output:
This AST A+ series also support CVBS (75 Ohms) video output with OSD
(On Screen Display) functionality. The composite video output can be
seen online on external display through composite video card or TV
Tuner. The real time temperature can be monitored from the video
output, focusing on the hot spot area of the target body. The exposure
quality can be observed through video output while adjusting the
exposure time parameter in the menu. CVBS output feature enables the
user to monitor the real time condition of the high temperature target
body while observing the target temperature simultaneously.
The CVBS output supported by AST A+ series is PAL (Phase Alternating Line) format. The countries which support
video format other than PAL may need PAL/NTSC/SECAM video converter as per requirement.
Note : The pyrometer may require 20-25 minutes stabilization time for the accurate temperature measurement
depending upon the field environment and target behavior.

Chapter - 5
Software Installation
The provided AST software “InfraSoft” offers digital PC interface RS-232 RS-485. Using this software we can
set all the parameters like response time, analog scale, emissivity, clear time, communication mode. This software
provide all necessary information about pyrometer.
5.1 Installation
Install the pyrometer software using the installation guide file on CD ROM & restart your PC as per guidelines
provided for installation. After installation of the software; Double click the application. It will open the screen of
software.
&
5.2 Parameters in main screen
5.2.1 Communication
Communication between the AST pyrometer and
the software is implemented via a cable connected
between the pyrometer and the PC serial port. This enables
the acquisition and recording of data, as well as the transfer
of commands from the software application to the AST
pyrometer. Communication can be done by clicking on
“Communication panel" and select correct COM Port
address where pyrometer is connected. Also user has to
select address of the pyrometer(Example: Default 01/
printed on the pyrometer sticker). Then click on CONNECT
Button.
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(A)Emissivity settings The emissivity can be set by clicking on
"Parameters” and select or type in the desired emissivity directly
in the description field. The emissivity value will be transferred
to pyrometer by hitting the "TAB " button.
(B)Response time The desired response time can be chosen in
the panel Parameter by clicking the appropriate list box (as per
the values available in the drop box of response time). This
parameter is use to set the analog response time of pyrometer.
(C)Sub Range User can change the sub range of pyrometer in the
panel Parameter. Sub range must be within the basic range of
pyrometer, the minimum span between higher & lower range is
51. Analog output will be automatically set according to the sub-
range by hitting "TAB" button.
(D)Sensor Type It shows pyrometer sensor type. User can
change sensor type from two color to single color and vice versa
(only applicable with two color pyrometer).
(E)Switch off level% ( for two color pyrometer) The switch of
level is the function that is used to avoid measurement errors
caused by signals, which are too low. Although factory default is
set to 15 %, the switch off limit can be adjusted between 2 and
50%.
(F)Unit User can change the measuring unit of temperature from
“Centigrade" to “Fahrenheit" and vice versa.
5.2.2 Temperature
It shows the temperature measured by the pyrometer
5.2.3 Parameter Setting
All user selectable device parameters can be set by using the software in the Panel "Parameter"
For communication of multiple pyrometers, select different com port and address.
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