AST A250 FO-PL User manual

AST A250/A450 FO-PL
AST - Accurate Sensors Technologies
Misgav Industrial Park, Misgav 20173, Israel
Tel: [phone], Fax: [phone]
Email: [e-mail]
Web: www.accuratesensors.com
USER MANUAL
Accurate Sensors Technologies
Non-contact Infrared Pyrometers
We measure accurate temperature in extreme conditions
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Accurate Sensors Technologies
Index
1. Chapter - 1
General information
2. Chapter - 2............................................................................................................................. 2
Introduction
2.1 Application, range and working principle
2.2 Technical specification
2.3 Fiber optic cable
2.4 Optics
3. Chapter - 3............................................................................................................................. 5
Installation of pyrometer
3.1 Installation
3.2 Mechanical accessories
3.3 Electrical installation
4. Chapter - 4............................................................................................................................. 11
Software installation
4.1 Installation
4.2 Parameters in main screen
5. Chapter - 5............................................................................................................................. 20
Android Application Software
5.1 Installation Process
5.2 Communication
5.3 Operation
5.4 Data logging & Online graph
6. Chapter - 6............................................................................................................................. 24
Calculate Spot size
7. Chapter - 7............................................................................................................................. 25
Maintenance
8. Chapter - 8............................................................................................................................. 26
Serial communication protocol
9. Appendix B............................................................................................................................ 31
10. Appendix C............................................................................................................................ 32
............................................................................................................................. 1
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Accurate Sensors Technologies
1
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 for 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
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Accurate Sensors Technologies
2
Chapter - 2
Introduction
AST A250 / AST A450 FO PL is specially designed highly accurate digital single color pyrometer with fiber optic to
provide high performance and low maintenance of non contact temperature measurement in demanding industrial
environment. They are designed for areas with high ambient temperature (upto 250°C) without cooling or in areas
where strong electromagnetic interference can influence correct measurement because the fiber & optical head do
not contain any electronic part.
2.1 Product key features Working Principle, Range & Application
AST A250 / AST A450 FO PL are highly accurate pyrometers with fiber optics especially designed for rough
industrial environment for temperature measurement of metals, ceramic or graphite. They are suitable for high
temperature measurement ranging from 250°C to 2500°C.
These pyrometers have solid body in stainless steel housing which provides high operation safety even in rough
industrial environment, and large variety of optics with fixed focus which can be easily used in all industrial areas. The
radiation from hot object is focused on the detector by optics which then travel into mono fiber cable with flexible
stainless steel protection tube and converted into electrical signals. This signal is then linearize and converted into
standard analog & digital outputs.
AST A250 / AST A450 FO PL has a fast response time of 2msec. Pyrometer have RS-232, RS-485 & USB 2.0
outputs. Response time, emissivity, sub range and peak picker selection can be preset ex works or adjusted through
available software.
According to application there are two optical heads small (head 1) & big (head 2).The heat radiation, enter
from optical head, to the lens system & travel through mono glass fiber with flexible stainless steel protection tube
where it is transmitted along to the converted .The optical head contains only the lens system, the electronic are
located in the converter box, so the measurement is possible in atmospheric condition up to 250°C.
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 applications in which AST pyrometers can be used are:
üInduction heating
üAnnealing
üWelding
üForging
üSintering
üRolling mills
üRotary kilns
Standard Item supplied with AST A250 / AST A450 FO PL:
üAST pyrometer
üConnection cable 12-core (length - 5 m)
üDigital cable 3-core (length - 1.5 m)
üMono fiber optic cable (length - 2.5 m)
üOptical head
üAST software CD
üManual
üCertificate of calibration
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Accurate Sensors Technologies
3
2.2 Technical Specifications
Model AST A250 FO/PL
Measured Temperatures Range
(Analog sub range adjustable) 250°C - 1800 °C
Emissivity Range 0.1…..1.0 adjustable
Spectral Range, µm 1.6µm 1µm
Photodetector Type InGaAs
Response Time 2msec. Adjustable upto 10Sec.
Accuracy
Repeatability
+/- 0.3% of the measured value + 1°C
+/- 0.1% of the measured value + 1°C
Analog Output 4 - 20mA or 0 - 20mA or 0 -10 V user selectable
Digital Output USB 2.0, RS-232 or RS-485 (Isolated) User Selectable
Power Supply 24 V DC
Operating temperature range at fiber Max.250°C at fiber optics cable and optical head, 0….70°C at
pyrometer end
Fiber Optic 2.5meter standard (available 5, 10, 15, 20 meter on request)
Sighting Laser pilot light
Isolation Power supply and digital output and analog output are
galvanically isolated against each other
Operating humidity 10 - 95%, Non-Condensing Conditions
Housing Stainless steel, IP65
Ø49.5 mm; L=118mm;/0.6kg
Adjustable Parameters via software Response time, Peak picker, Average, Analog output sub range,
emissivity, interval of data storage.
AST A450 FO/PL
600°C - 2500°C
Si
Power Consumption Max. 2.5 Watt.
40:1 OH(I)
80:1 OH(II)
100:1 OH(ll) - V
100:1 OH(I)
200:1 OH(II)
200:1 OH(ll) - V
100:1 OH(I)
200:1 OH(II)
200:1 OH(ll) - V
100:1 OH(I)
200:1 OH(II)
200:1 OH(ll) -V
Distance to Spot Size Ratio
Fig. 1 Dimensions of Pyrometer
2.3 Dimensions
118 mm
Ø48 mm
Ø49.5 mm
34.5 mm
Ø15 mm
6.5 mm
22.5 mm
Binder
Connector
OH-I OH-II
OH-Il (Variable Head)
44 mm
Ø14.5 mm
M16 x 1.0
74.5 mm
Ø25 mm
25 mm
M25 x 1.5
66.4 mm
Ø25mm
M25x1.5
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Accurate Sensors Technologies
4
The radiation, from object coming through optical head, is transported by the lens
into the mono fiber cable with flexible stainless steel protection where it is
transmitted to the converter. It can withstand ambient temperature upto 250°C
without cooling because there is no electronic part.
Length : 2 . 5 m s c o p o f d e l i v e r y ; 5 m , 7 . 5 m , 1 0 m ,
15m, 30m on request
Ambient temp. : Max 250°C
2.3 Fiber optics cable
(Reference no: 5000-01)
Fig. Replacement fiber
optic cable 2.5 M
2.4 Optics
Pyrometer receives heat radiation from the measured object, which is converted to an electrical signal after
passing through the lens. The measured object can be at any distance from pyrometer however as far as the object
from pyrometer the measured area (Spot size) will be larger.
Depending on the application the instrument will be delivered with a small or big optical head:
Type I - “Optical head-I” is suitable for use in confined spaces due to very small dimensions. The
optics is adjusted to one of the measuring distances mentioned in following table.
Type II - This optical head is fixed adjusted optical head and is bigger in size than “optical head-I”
Type lll - Variable With variable optical head ll [OH ll - V] each working distance can be adjusted according to
the pull out length as mentioned in the spot size table.
Variable Optics
Working Distance (mm)
Optical Head Length L (mm)
Optical Pullout P(mm)
Spot Size(mm)
AST A250 FO PL
Spot Size(mm)
AST A450 FO PL
250 - 1300°C
300 - 1800°C
600 - 1900°C
750 - 2500°C
Optical Head - ll - V (Variable)
0
66.4
0
18
18
18
10
250
78.9
12.5
2.5
1.3
1.3
1.3
300
75.75
9.35
3
1.5
1.5
1.5
400
72.8
6.4
4
2
2
2
600
70.1
3.7
6
3
3
3
800
68.8
2.4
8
4
4
4
1000
68.1
1.7
10
5
5
5
1500
67.15
0.75
15
7.5
7.5
7.5
2000
66.7
0.3
20
10
10
10
2500
66.4
0
25
13
13
13
Optical Head Spot Sizes(mm)
250°C - 1300°C
120 3.0
260 6.5
700 17.5
Spot Sizes(mm)
300°C - 1800°C
2.6
1.2
7.0
Working Distances
(mm)
A250 FO/PL A250 FO/PL A450 FO/PL
Spot Sizes(mm)
600°C - 1900°C
1.2
2.6
7.0
Fixed Optics
Optical Head - I
Optical Head - II
1.2
2.6
7.0
90
200
600
4500
1.2
2.5
7.5
57
0.5
3.0
1.0
23
0.5
1.0
3.0
23
0.5
1.0
3.0
23
A450 FO/PL
Spot Sizes(mm)
750°C - 2500°C
10.0 4.0Aperture(mm) 6.0 10.0
18.0 18.0Aperture(mm) 12.0 18.0
The fibre optic cable has a small radius it can be “snaked” around and through
machinery, walls and other obstacles. Cable can be changed if needed. Fibre optic cable
with us can be supplied on request its details are given as in the description under.
Longer fibre optic cable allows the pyrometer to be used away from the hostile
environment.
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Accurate Sensors Technologies
5
If the pyrometer is not installed at
manufactured working distance (WD) than the spot
size at actual installed distance can be calculated.
User can easily find out the spot size For example, if
factory made working distance is 260mm &
pyrometer is AST 250 FO-PL then spot size is 6.5mm
for head-I (as given in above table). If user installed
this pyrometer at 700mm then spot size is not
17.5mm (as given in table), user should have to
calculate as given below method.
Fig. Spot Size
Example of OH(ll) - V
Pull Out (P) = 1.7 mm
Optical Head Length (L) = 68.1 mm
SS 5.0 mm
WD 1000 mm
Case-I: If installed working distance is greater than manufactured working distance
Case-II: If installed working distance is smaller than manufactured working distance
Where : S= manufactured spot size of pyrometer(mm), A = It shows the value of lens opening (aperture in mm)
Fig. 2 Spot Size
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Accurate Sensors Technologies
6
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 1000 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; and adjust emissivity settings
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
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Accurate Sensors Technologies
7
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
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.
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Accurate Sensors Technologies
8
3.1.1 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.
2. Know your pyrometer spot size according to point 2.3.
3. Pyrometer ambient temperature should be within 0° to 70°C (read 3.1.4).
3.1.2 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.
Note: The laser spot (PL) is only for indication of measuring spot, not exactly shows the measuring area.
Due to fiber optic cable the pyrometer can be placed remote from high temperature area. The optical head
containing sensor is placed at the object whose temperature is to be measured. The radiation from hot object is
focused on the detector by optics which then travel into mono fiber cable with flexible stainless steel protection tube
and converted into electrical signals. This signal is then linearized and converted into standard analog & digital
outputs.
3.1.3 Mounting of pyrometer
To install the sensor head at the place of measurement a mounting support is supplied as an accessory, after
losing the clamp screws, it can be fastened correctly.
3.1.4 Ambient temperature
The allowed operation temperature for the pyrometer is 0°C to +70°C. But the temperature at fiber optic &
optical head is 250°C max. Therefore, if sensor head is to be used above 250°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 air purge & water cooling jacket is given in point 3.2.
3.1.5 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.
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Accurate Sensors Technologies
9
Fig. 5 Water Cooling Jacket Incl.
Air Purge Unit - Optical Head-II
(Reference No: 8000-01)
Fig. 9
(Reference no: 8200-03)
Adjustable Mounting for Optical Head-II
Fig. 7 Air Purge Unit-Optical Head-II
(Reference No: 8200-01)
3.2 Mechanical accessories
Water pressure : < 10 bar
Air pressure : < 0.5 bar
Air consumption : 2...3 m³/h
Ambient temperature : < 200°C
Metal : Stainless steel
Weight : 1.35 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. 6 Air Purge Unit for Optical Head-I
(Reference No: 8200-02)
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. 8 Adjustable Mounting for Optical Head-I
(Reference No: 8200-04)
3.5 Electrical Installation
Fig. 11 Power Supply Unit
(Reference no: 9000-02)
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
(well stabilized
ripple max 50mV)
Fig. 10 12-Core Cable
(Reference no: 7002-02)
3.5.1 Power Supply
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Fig. 13 12-pin Binder connector Fig. 14 RS-232 communication connection
Male Female
L
C
BA
J
K
G
H
M
F
E
D
LC
J
B
A
K
G
H
M
FE
D
D - Type 9 pin Female
Connector
LC
J
B
A
K
G
H
M
FE
D8
3
7
2
4
9
6
1
5
RxD
DGND
TxD
H
Pin
A
G
C
D
F
H
M
J
K
B
Colour
Red
White
Blue
Pink
Black
Yellow
Violet
Brown
Green
Yellow
Grey
Indication
+ 24 V DC In
Ground
TxD (RS-232) / D- (RS-485)
RxD (RS-232) / D+ (RS-485)
RS-232 communication
(-) 4-20mA / 0-20mA
(+) 4-20mA / 0-20mA
Short / Open both wires for laser
ON/OFF
- (0-10V)
+ (0-10V)
Used for
Power supply
RS-232/ communicationRS-485
Analog current output
Laser ON/OFF
Analog voltage output
E Blue-Yellow N/A
L Red-Grey N/A Not used
Table 2 : Color code & Pin specification for pyrometer connections
Accurate Sensors Technologies
10
3.5.2 Connector pin assignment on the back of the pyrometer
For connecting pyrometer with computer via connector pin (on the back 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.
RS-232 Connection
Pink
Blue
Black
Ref. No.: 9000-01
Temperature Indicator
230V, AC
AST 12-core cable
AST Pyrometer with
Digital Output RS-232
White
Red
Violet
Yellow
GND
+24 V DC
20
4-20 mA(+)
17
(-)
9
10
Female
RS-232 Connector
Computer
AST Digital Cable
Fig. 12 Connecting pyrometer (RS-232 Converted) with computer
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

3.5.3 Power ON Pyrometer
1. Connect the 12-core cable (Supplied with pyrometer) with pyrometer 12-pin binder connector given at the
back side of pyrometer.
2. Connect the 12-core cable supply wire with +24V DC as given in table above.
3. Connect remaining wires as per your requirement (details given in table above).
4. Provide insulation for not used end points of 12-core cable.
5. Now, the pyrometer can be switch ON.
3.5.4 Converter RS-232 ↔ RS-485
The pyrometer can communicate with PC using RS-232 or RS-485.
RS-232 is used only for short distances.
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. 18 Serial Communication Cable Male/Female
(RS-232 Communication Cable)
Female
RS-232 Connector
Male
RS-232 Connector
Fig. 15 Converter RS-232 ↔ RS-485
9000-03)(Reference no:
Fig. 16 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
20
4-20 mA(+) 17
(-)
9
10 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
Fig. 17 RS-232 to RS-485 to RS-232 Connection
Ref. No.: 9000-01
Temperature Indicator
230V, AC
AST 12-core cable
White
Red
Violet
Yellow
GND
+24 V DC
20
4-20 mA
17
(-)
9
10
Pink
Blue
Black
(+)
AST Pyrometer with
Digital Output RS-232
1
2
3
4
5
5 4 3 2 1
9876
Female
RS-232 Connector
Ref. No.: 9000-03
*Serial Communication
Cable Male/Female
(RS-232 Communication
Cable)
5
4
3
2
1
98
7
6
Female
RS-232 Connector
Ref. No.: 9000-03
1
2
3
4
5D-
D+
Earth
230 V, AC
Male
RS-232 Connector
Female
RS-232
Connector
Computer
Male
RS-232
Connector
Accurate Sensors Technologies
11
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Fig. 20 Temperature Indicator
(Reference no: 9000-01)
Fig. 21 Display & Parameterizer P-
(Reference no: 9001-01)
120
3.5.5 Display Instrument
To display the measured temperature 7 segment digital
indicator is used. 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
3.5.6 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
Fig. 19 Multi-Pyrometer Connection
Note: For 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
20
4-20 mA
17
(-)
9
10
(+)
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
20
4-20 mA
17
(-)
9
10
(+)
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
20
4-20 mA(+) 17
(-)
9
10 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
3.5.4 Connecting Multiple Pyrometers
In order to connect multiple pyrometers (Multiple pyrometer
communication) to computer each pyrometer must have digital
output RS-485 converted. In our software user can connect 2
pyrometers with system(PC). Each pyrometer should be assigned a
different address. For connection assessment have a look on the
diagram below
Accurate Sensors Technologies
12
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

Chapter - 4
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.
4.1 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.
&
4.2 Parameters in main screen
4.2.1 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.
Accurate Sensors Technologies
13
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

(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).
4.2.2 Temperature
It shows the temperature measured by the pyrometer
4.2.3 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.
Accurate Sensors Technologies
14
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

(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.
(G)Clear time (tCL) If the peak picker is switched on, the highest last temperature value will always be displayed and
stored. As such, it may be beneficial to periodically clear and reset the stored values in order to obtain new
temperature readings.
Peak-Picker:
If the peak picker is switched on, the highest last temperature value will always be displayed and stored. As such, it
may be beneficial to periodically clear and reset the stored values in order to obtain new temperature readings. This
feature is particularly useful when object temperature is not uniform across its dimension or the pyrometer is not
constantly viewing an object to be measured. The peak picker works on two buffer memory to find maximum value
over a defined interval. With the first memory, the highest measured value is held and is deleted alternately in the
time interval set (clear time). The other memory retains the maximum value throughout the next time interval. The
disadvantages of fluctuations in the display with the clock frequency are thereby eliminated.
Note:
The maximum value storage coincides with adjustments made to response time. Therefore:
(I) Clear time<= the adjusted response time is useless
(ii) Clear times must be at least 5 times longer than the response time.
(iii) Only maxima with full maximum value can be recorded, which appear at least 5 times longer than response time.
Accurate Sensors Technologies
15
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

4.2.5 Record
Record is for continuous data logging. It records the measured temperature, emissivity with current date &
time.To start data logging click on start button. If user wants to record emissivity, click on record emissivity button.
After Clicking Start button window appears where user can specify the file name & location.
This screen shows the Model, basic range, serial number,
version, Head temperature, internal temperature, working
distance, spot size-apperture.
The following setting are possible :
OFF : At clear time “OFF” the maximum value storage is switched off and only momentary values are measured.
Auto : “Auto” mode is used for discontinuous measuring task, such as object being transported on a conveyer belt in
such a case the maximum value for each object has to be indicated. when the object passes the measuring beam of
the pyrometer, the maximum value is stored until a new hot object appears in the measuring beam. The temperature
which has to be recognized as “hot” is defined by the low limit of the adjusted sub range. The stored maximum value
will be deleted when the temperature of the new hot object exceeds the low limit “from” of the sub range by at least
1°C. If a lower limit is not entered, the maximum value storage will be deleted whenever the low level of the full
measuring has been exceeded.
(H)Relative energy(for two color pyrometer) The relative energy shows a signal weakening which can be caused by
contaminations of the optics or a viewing window or by dust in the field of view or a too small measuring object.
Relative energy shows the measured intensity compared to the intensity, a black body radiation source would have
at a determined ratio temperature of the pyrometer.
(I)Analog Range User can select the analog range from the option 4-20mA, 0-20 mA & 0-10V.
(J)Comm. Mode User can select the communication mode as per requirement [RS-232 / RS-485].
Note: For connection diagram from RS-232 to RS-485 & RS-485 to RS-232 Refer Page No:-9
To view parameters of multiple devices select the pyrometer name from the drop down list that appears at the top of
the screen.
4.2.4 Device information
Pyrometer specific information will be displayed in the Info Panel
10msec...25sec : Any clear time between 10msec and 25sec(please refer to Note(ii) above) when set, estimates the
maximum values and holds it in two buffer memory. After the entered time, the storage will be deleted.
Accurate Sensors Technologies
16
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

If user wants file in Spreadsheet format, user can export by choosing Excel Spreadsheet in file menu.
To record emissivity, click on Record Emissivity button.
Record will be saved as .txt format and the name of file will be user define.
Accurate Sensors Technologies
17
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm

To see previous record open the file by clicking on menu File open.
Screen containing historical trend & historical data will appear.
File will be stored in .xls format named as “export”. This “export.xls” file will be saved where the software is installed.
Accurate Sensors Technologies
18
14.50
44
M16 x 1.0
25
74.5
25
M25 x 1.5
118.00 mm
34.50 mm
Ø49.50 mm
Ø48.00 mm
Binder
Connector
SMA 905
¼” x 36
for FOC
AST A250 / AST A450 FO-PL
14.00 mm