AST A250+ PL/TL/Video User Manual
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AST A250+ PL/TL/Video User Manual

Non-contact infrared pyrometers
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Accurate Sensors Technologies
We measure accurate temperature in extreme conditions
AST A250+/A450+ PL/TL Video
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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Summary of Contents for AST A250+ PL/TL/Video

  • Page 1 Accurate Sensors Technologies We measure accurate temperature in extreme conditions AST A250+/A450+ PL/TL Video 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 Accurate Sensors Technologies 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 These pyrometers have OLED display which shows temperature and provides menu selection via parameterizaion keys. AST A250+/A450+ PL/TL/Video 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.

  • Page 5: Technical Specifications

    Accurate Sensors Technologies 2.2 Technical Specifications Model A250+ PL/TL/Video A450+ PL/TL/Video 210°C….1350°C Temperature Range 250°C….1800°C 600°C….2500°C (Analog sub-range adjustable) 300°C..2500°C 350°C..3000°C Spectral Range 1.6 µm 1.0 µm Photodetector Type InGaAs 75:1 (210°C….1350°C) 150:1 (250°C….1800°C) Distance to Spot Size Ratio 300:1 (600°C….2500°C) 300:1 (300°C….2500°C)
  • Page 6 Accurate Sensors Technologies 2.3 Optics The pyrometer measure temperature by receiving heat radiation from the object whose temperature has to be 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 Spot Sizes(mm) A250+...

  • Page 7: Installation

    Accurate Sensors Technologies 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 14 µm depending on the material and properties of object.
  • Page 8 Accurate Sensors Technologies 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.

  • Page 9: Location Selection

    Accurate Sensors Technologies 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.
  • Page 10 Accurate Sensors Technologies 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 11: Mounting Plate

    Accurate Sensors Technologies 3.4.6 Mounting Plate Fig. 10 Mounting Plate (Reference no: 8500-08) Combination of Accessories Mounting Pyrometer Mounting Flange Clamp(Pyrometer) Water cooling Airpurge Jacket Fig. 12 Pyrometer with Fig. 11 Pyrometer with Mounting Clamp Mounting Flange (8500-07) + Air Purge (8500-05) Reference No.
  • Page 12 Ref. No.: 9000-01 Temperature Indicator 230V, AC 4-20 mA(+) Yellow Violet +24 V DC White AST Digital Cable Pink RS-485 to RS-232/ AST Pyrometer with Blue Digital Output RS-485 Converter Computer...
  • Page 13 (RS-232 Communication 230V, AC Cable) 4-20 mA(+) 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. 22 RS-485 to RS-232 Connection...
  • Page 14 Alarm (Reference no: 9000-01) 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 –...

  • Page 15: Operation

    Accurate Sensors Technologies Chapter - 4 Setting at the instrument OLED Display Up Key Down key Laser Indication (RED LED) Status Indication (Green LED) Laser ON/OFF Key Enter/Function Key Fig. 27 For PL Model 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.
  • Page 16 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. 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.
  • Page 17 Accurate Sensors Technologies OLED Display Parameters Description Reset Below User can set RBT within the limit of pyrometer temperature sub range. This (a) RBT Temperature function sets the temperature above peak action start. Ex. RBT : 750°C Outer : 600°C : 1 sec.
  • Page 18 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.

  • Page 19: Software Installation

    Accurate Sensors Technologies 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.
  • Page 20 Accurate Sensors Technologies For communication of multiple pyrometers, select different com port and address. 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" (A)Emissivity settings The emissivity can be set by clicking on "Parameters”...
  • Page 21 Accurate Sensors Technologies (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 22 Accurate Sensors Technologies (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 23: Device Information

    Accurate Sensors Technologies (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 24 Accurate Sensors Technologies 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 25 Accurate Sensors Technologies 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 26: Maintenance

    Accurate Sensors Technologies Chapter - 6 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. 6.1 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 27 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 28 Accurate Sensors Technologies 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 29 Accurate Sensors Technologies 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 0x30, 0x41 0x52, 0x44 0x30,0x35,0x39,0x44 0x30, 0x30, 0x30, 0x30 0x03...
  • Page 30 Accurate Sensors Technologies 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 31: Broadcast Message

    Accurate Sensors Technologies 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 32 Accurate Sensors Technologies 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...

  • Page 33: Mechanical Drawings

    Accurate Sensors Technologies Appendix C Mechanical Drawings Water Cooling Jacket Water cooling Jacket( 8500-09) with Mounting Flange (8500-07) Ø97.80 Water Cooling Jacket (8500-09) with Mounting Clamp (8500-04) Air Purge Unit 6.60 THRU ALL M6x1.0 - 6H 74.50 Air Purge Unit (Reference no: 8500-05)
  • Page 34 Accurate Sensors Technologies Adjustable Mounting Stand ° 3 x M6 THRU AT 120 Adjustable Mounting Stand (Reference no: 8000-07) Mounting Clamp (Pyrometer) Mounting Clamp (Reference no: 8500-04) Mounting Clamp Water Cooling Jacket 6.60 THRU ALL 6.50 THRU ALL R16.50 R23.50 SECTION A-A Mounting Clamp water cooling Jacket (Reference no: 8500-06)

  • Page 35: Packing Instructions

    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 Copyright: ©...
  • Page 36 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.

This manual is also suitable for:

A450+ pl/tl/video

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