AST A250C PL User Manual
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AST A250C PL User Manual

Non-contact infrared pyrometers
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A
ccurate ensors echnologies
S
T
We measure accurate temperature in extreme conditions
AST A250C PL/TL
Non-contact Infrared Pyrometers
USER MANUAL
AST - Accurate Sensors Technologies
Misgav Industrial Park
, Misgav 20173, Israel
Tel: +972-4-9990025, Fax: +972-4-9990031
Email: info@accuratesensors.com
Web: www.accuratesensors.com

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  • Page 1 We measure accurate temperature in extreme conditions AST A250C PL/TL Non-contact Infrared Pyrometers USER MANUAL AST - Accurate Sensors Technologies Misgav Industrial Park , Misgav 20173, Israel Tel: +972-4-9990025, Fax: +972-4-9990031 Email: info@accuratesensors.com Web: www.accuratesensors.com...
  • Page 2 Index 1. Chapter - 1 ........................General information 2. Chapter - 2 ........................Introduction Product Key Features, Application and Range Technical specification Optics 3. Chapter - 3 ........................Basics & Installation of Pyrometer Basics of Infrared temperature measurement of an object Installation Location Selection Mechanical Accessories...

  • Page 3: General Information

    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.
  • Page 4 2.1 Application, Range and Working Principle The digital AST A250C PL/TL pyrometer use ratio method in which 2 adjacent wave lengths are used for measurement of temperature. They are suitable for high temperature measurement ranging from 350°C to 1350°C.
  • Page 5 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. The applications in which AST pyrometers can be used are: Induction heating Ÿ...

  • Page 6: Technical Specifications

    Note: - After power supply initialization, keep pyrometer under stable temperature condition for 30-35 minutes for to get above stated accuracy. Laser should be used only for targeting purpose. In normal measuring laser should be turned off to get correct measurements. þ Standard Item supplied with AST A250C PL/TL USB cable þ þ AST software CD AST pyrometer þ...
  • Page 7 (A) If WD = , Then spot size can be calculated with “field of view” (FOV), for example if pyrometer is AST A250C (350° to 1350°C) than spot size at 5000mm (5m) can be calculated as Caution for WD = ∞...
  • Page 8 If the pyrometer is not installed at manufactured working distance (WD) then spot size at actual installed distance should be calculated. For example, if factory made working distance is 1000mm & pyrometer is AST A250C (350° - 1350°C) then spot size is 10mm (as given in table). If user installed this pyrometer at 5000mm then spot size is not 50mm (as given in table), user should have to calculate as given below method.

  • Page 9: Installation

    Chapter - 3 Basics & Installation of the Pyrometer Basics of 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.
  • Page 10 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.

  • Page 11: Location Selection

    Location selection Qualified operating personnel 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.

  • Page 12: Mechanical Accessories

    Mechanical Accessories 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.) Water pressure <...
  • Page 13 Ref. No.: 9000-01 Temperature Indicator 230V, AC 4-20 mA(+) Yellow Violet +24 V DC White Blue AST Digital Cable Pink AST Pyrometer with Black Digital Output RS-232 Computer AST 12-core cable Female RS-232 Connection RS-232 Connector...
  • Page 14 Table 2 : Color code & Pin specification for pyrometer connections Colour Indication Used for + 24 V DC In Power supply White Ground Blue TxD (RS-232) / D- (RS-485) Pink RxD (RS-232) / D+ (RS-485) RS-232/ RS-485 communication Black RS-232 communication Yellow (-) 4-20mA / 0-20mA...
  • Page 15 (RS-232 Communication 230V, AC 4-20 mA(+) Cable) Yellow Violet Earth +24 V DC White Computer Pink AST Pyrometer with Female Male Female Digital Output RS-485 Blue RS-232 Connector RS-232 Connector RS-232 Connector AST 12-core cable Ref. No.: 9000-03 Fig. 17 RS-485 to RS-232 Connection...
  • Page 16 Fig. 21 Temperature Indicator (Reference no: 9000-01) 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.

  • Page 17: Software Installation

    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.
  • Page 18 For communication of multiple pyrometers, select different com port and address. 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" (A)Emissivity settings The emissivity can be set by clicking on "Parameters”...
  • Page 19 (G) Peak Picker Setting Three Pickers are available in Pickers setting menu (Auto, tCL, Smart) & user can switch on any as per requirement, one at a time. (G1) 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.
  • Page 20 (G3) Smart If the smart 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 the pyrometer is not constantly viewing an object to be measured. Smart Picker Functions Smart picker can be turn ON &...

  • Page 21: Device Information

    (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.
  • Page 22 File will be stored in .xls format named as “export”. This “export.xls” file will be saved where the software is installed. To see previous record open the file by clicking on menu File open. Screen containing historical trend & historical data will appear.
  • Page 23 Temperature graph of connected pyrometer is displayed on right side of the screen. This shows the measured temperature corresponding to the time. Note: After connecting the pyrometer right click on the graph screen and choose "Set to default" option from pop-up menu.

  • Page 24: Android Application Software

    Android Application Software 5.1 Installation Process AST provides “infrasmart .apk” for android phone. This apk is in software CD. Special Note: - This apk is compatible with android version 4.0 and above Following are the predefined steps to install apk in a mobile.

  • Page 25: Operation

    5.2 Communication After installation, switch on Bluetooth of mobile. Scan for available devices. (Fig. 6) Select the device name from list for pairing. (Fig. 5.7) For pairing user need to enter pin no. Pin no will be reverse of last four digit of device name.( For eg:- if device name is A2B-1627 then pin will be 7261).
  • Page 26 5.4 Data logging & Online graph For data logging user need to click on dots which is at the right side as shown by arrow in below screen (Fig. 11) Next screen will be (Fig. 5.12) (Fig. 5.11) (Fig. 5.12) For data logging click on data logging &...
  • Page 27 To Start data logging, Enter file name & log time then click on start tab. Note : If file name or log time is not enter within 5 sec then time out error will appear. To save data logging click on save button. Location where file is saved will be shown on data logging screen as shown(Fig.
  • Page 28 Chapter - 6 Calculate Spot Size Calculate Spot Size To calculate Spot Size click on Utility This option is used to calculate the spot size at installed working distance of the Pyrometer. When you click on calculate spot size the new window will open. Fig.

  • Page 29: Cleaning Lens

    Chapter - 7 Maintenance In case of any queries, questions regarding repair, solutions to problems, calibration and assistance you may contact our sales representatives. Most of problems can be solved telephonically. 7.1 Cleaning Lens The lens should be kept clean all the time as it aims at center of target object. When cleaning lens care should be taken and it can be done as follows : Firstly blow off lightly loose particles with “canned air”...
  • Page 30 AST sensors always operate as Slave devices. Using RS485 serial communication option allows connecting more than one sensor to Master device. AST sensors always perform delay of 5 ms before sending an answer on Master request to meet RS485 hardware requirement.
  • Page 31 Device model number (read '0E00' '01' 10 bytes “AST450C “', if less than 10 byte pad with space at end only) Firmware version '1300' '01' Firmware version number of device (read only) Sensor serial number (read 6 bytes in hex, if less than 6 bytes pad with '0' at start. Only numbers '1400' '01' only)
  • Page 32 Reply to above command if address '0000' contains value 1497 and address '0001' contains value 0000. Byte 1 Bytes 2, 3 Bytes 4, 5 Bytes 6-9 Bytes 10-13 Byte 14 Byte 15-16 059D 0000 0x02 0x30, 0x41 0x52, 0x44 0x30,0x35,0x39,0x44 0x30, 0x30, 0x30, 0x30 0x03 0x41, 0x43...
  • Page 33 Error Codes Error Code Description Comments Invalid check sum See how to calculate a check sum Unknown command Protocol uses only RD (Batch Read) and WD (Batch Write) commands Data length error Number of items in WD (Batch Write) command doesn't match number of data bytes ETX not found ETX (0x03) not present in command...

  • Page 34: Broadcast Message

    Appendix A DATA Comments Status code '0000' : No error '0001' : Signal is lower than sensor sensitivity '0002' : Out of range due to T brightness minimum '0003' : Too low energy '0004' : Signal is higher than sensor sensitivity '0006' : Sharp brightness jump '0007' : Non stable object measurement '0011' : Internal temperature warning...
  • Page 35 Appendix B Typical emissivity values for various materials available: All the emissivity values shown in the table are only approximate, as it depends various parameters and it may affect the emissivity of a material. These parameters are as under: Temperature Thickness of material Angle of measurement Spectral range of measurement...

  • Page 36: Mechanical Drawings

    Appendix C Mechanical Drawings Water Cooling Jacket Water Cooling Jacket with Adjustable Flange PL Water Cooling Jacket with Adjustable Flange TL (Reference no: 8000-02) (Reference no: 8000-06) Air Purge Unit Adjustable Mounting Stand ° 3 x M6 THRU AT 120 FOR 6 mm INSIDE DIAMETER HOSE GRUB SCREW FOR...

  • Page 37: Maintenance

    Liability regarding any direct or indirect damage caused by this software is excluded. Limit of liability AST not liable for any damages that arise from the use of any examples or processes mentioned in this manual. Specifications are subject to change without notice...
  • Page 38 AST reserves the right to make changes, without further notice, to any products herein to improve reliability, function, or design. AST does not assume any liability arising out of the application or use of any product described herein, neither does it convey any license under its patent rights nor the rights of others.
  • Page 40 Based on these technologies, AST/3T has bought to the market a line of pyrometers for the remote measurement of target temperatures using no physical contact. AST/3T pyrometers use a totally new approach for remote temperature measurement achieving high accuracy.

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