AST EL50 User manual

AST EL50
USER MANUAL
Accurate Sensors Technologies
Non-contact Infrared Pyrometers
We measure accurate temperature in extreme conditions
AST - Accurate Sensors Technologies
Misgav Industrial Park, Misgav 20173, Israel
Tel: [phone], Fax: [phone]
Email: [e-mail]
Web: www.accuratesensors.com

Index
1. Chapter - 1
General information
2. Chapter - 2 ....................................................................................................................... 2
Introduction
2.1 Application, range and working principle
3. Chapter - 3 ....................................................................................................................... 3
Technical specification
4. Chapter - 4 ....................................................................................................................... 4
Setting at the instrument
4.1 Operation
4.2 Adjustment parameters
4.3 Connection diagram
4.4 Pin assignment
5. Chapter - 5 ....................................................................................................................... 7
Optics
5.1 Optical specification
5.2 Exchange of the Sensing Head
6. Chapter - 6 ....................................................................................................................... 8
Accessories
6.1 Electrical accessories
6.2 Mechanical accessories
7. Chapter - 7 ....................................................................................................................... 11
Software installation
7.1 Installation
7.2 Parameter in main screen
9. Chapter - 8 ....................................................................................................................... 18
Calculate spot size
10.Chapter - 9 ....................................................................................................................... 19
Serial communication protocol
....................................................................................................................... 1

We are pleased that you have chosen this high quality and highly efficient AST pyrometer for non-contact
temperature measurement.
Please read this manual carefully, step by step before performing any operation with the Pyrometer. It
contains all the necessary instructions for set up and operation of the pyrometer. When operating the instrument, it
is necessary to follow the general safety instructions.
1.1 Safety Measures
This section provides an overview about important safety regulations.
1.1.1 General
Each person working with the pyrometer must have read the user manual before operation. The Pyrometer
has only to be used for the purpose described in the manual.
1.1.2 Safety Precaution
The Pyrometer works only with a potential-free low voltage of range 24V DC. This voltage is not harmful for
the user.
1.1.3 Maintenance and use of Pyrometer
Pyrometer can be operated by the qualified person who has got instructions from the supervisor. It is
strongly prohibited to do technical modifications of the device without permission of the manufacturer.
1.1.4 Environmental Protection
The lens or its coating may contain harmful materials and hence it should not be disposed of with normal
waste.
1.1.5 Packaging and storage
Always use a shock-proof package for shipment of the pyrometer. It should be sealed to protect it against
humidity. Also protect the lens of the pyrometer with a cover. They should be stored at the temperature ranges from
-20° to +70° C.
1.1.6 Warranty
AST EL50 instruments have a warranty of two years from the invoice date. AST will replace defective parts,
which arises from design errors or manufacturing faults. In case, if pyrometer is opened, disassembled or modified
then the guarantees will loss.
AST does not accept liability for any damage or losses which might occur, including consequential damages
and financial losses, as a result of use of the equipment.
1.1.7 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
equipment with which this document is associated.
Chapter - 1
General Information
1

AST EL50 is specially designed highly accurate digital pyrometer in 4 wire technology with extended optical
head, inbuilt LCD & keypad for parameterization to provide high performance and low maintenance of non contact
temperature measurement in demanding industrial environment.
2.1 Application, Range and Working Principle
The AST EL50 pyrometers are especially designed for industrial purposes. They are suitable for high
temperature measurement ranging from 0°C to 800°C.
The AST EL50 are pyrometers with extended sensor head and equipped with a display which shows in
measuring mode the current temperature.The cable & optical head are unaffected by electromagnetically
interferences (e.g. induction) and can be used in ambient temperatures up to 70°C. The pyrometers are
equipped with a display which shows in measuring mode the current temperature. Additionally all parameters
can be read if they are changed via the integrated keys at the instrument. Via serial interface and the provided
software the temperature can be displayed and stored on a PC, parametrizing can also be done.
AST EL50 has response time of 20 msec. It has USB 2.0[RS-485/RS-232(Optional)].output Instrument can be
powered directly through USB without any external power supply. Emissivity, analog output sub range, response time
and Peak Picker, relay output, analog outputs, selection can be preset ex works or adjusted through available optional
software or via keypad.
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.
The applications in which AST pyrometers can be used are:
ŸPlastic & rubber
ŸCeramic
ŸPaper
ŸTextile
ŸFluids
ŸOxide/Painted metal surface
ŸWood & glass industries
2
Chapter - 2
Introduction
Sensing Head
20
45
15
M20 x 1.0

Chapter - 3
Technical Specifications
3
Model AST EL50
Measured Temperatures Range
(Analog output sub range adjustable) 0 °C - 800 °C
Spectral Range 8.....14µm
Photodetector Type Thermopile
Distance to spot size ratio 2:1 or 15:1
Response Time 20msec adjustable upto 10s
Accuracy
Emmisivity
+/-1.5% of temperature reading or +2°C (Optical head should be
at constant ambient temperature)
0.1 …… 1 adjustable
Analog Output 4-20mA or 0-20mA or 0-10V or T/C K-type or J-type user selectable
Digital Output
Relay Output (Optional)
USB 2.0,[ RS - 485 / RS - 232 (Optional)]
1 Relay output with hysteresis 60 VDC/ 42 VACRMS, 0,4 A
Power Supply 24 V DC
0.1 K
Operating Temperature Range Electronic and optical head 0…..70 °C
Storage temperature
Resolution
-20 to +70 °C
Dimensions & weight
Protection class
112.5 x 82.5 x 33 (L x W x D), 600g
IP 65
Adjustable Parameters via Keypad /
software
Emissivity, Analog output, Address, Response time, Peak picker,
Analog output Sub Range.
Repeatability 0.1% of reading in °C +1°C
82.50
112.50 2 x 6 THRU Mounting Hole
5
5
16
33
Note : In case of T/C J/K type analog output target temperature should be greater than ambient temperature.

Chapter - 4
Setting at the instrument
User can power up the unit either by USB input or 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 display. User
has to remove the screw (mark USB in figure) to connect the unit with PC via USB cable.
4.1 Operation
The programming keys FUNC, UP and DOWN enable the user to set the device on-site. Normally, LCD 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 Adjustable parameters
Emissivity : 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 given keypad on the
instrument.
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.
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.
4
24V DC input, analog
& digital output cable
USB output
Sensor cable maximum
length 15 mtr.
Function key to select
different functions
Function keys for
parameter setting
LCD display for measuring
temperature and parameterization
Wall Mounting holes

5
Example : if set point value is 200°C and Hysteresis set to 10. Then relay operation as below mentioned:
1. Relay contact OPEN below 210°C temperature.
2. Relay contact CLOSE above 210°C temperature.
3. Once relay contact CLOSED than relay contact is OPEN's when temperature falls below 190°C.
Ana. Sub range LO : Analog sub-range is adjustable within the basic range, user can set lower analog sub-range
here.
Ana. sub range HI : User can set the analog sub-range higher value here. Minimum span between lower &
higher value is 51°C
Analog output : User can select the output from
Temp. Unit : User can select °C or °F unit.
Sensor address : For communicating with pyrometer via software users have to give a address. The address
may be 1 to 255.
Response time : The response time can be set from 20 msec to 10sec.
Picker : User can calculate a maximum “peak” temperature value from specified number stored real
temperature in the sensor memory. User can either on or off the picker.
Head temp. : It shows the temperature of head.
Internal temp. : It shows the internal temperature of pyrometer.
4.3 Connection diagram
4-20mA or 0-20mA or 0-10V or T/C K-type or J-type
Connection through USB cable

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Accurate Sensors Technologies
AST
4.4 Pin assignment
Connector pin assignment:
Note : 1. For Analog output, DC supply (+24V DC) is must given to pyrometer first.
2. Pyrometer stabilization time is at least 15 minutes, when ambient temperature is changed.
Pin number Indication Descriptions
Pin number Indication Descriptions
XGND RS-232 / RS-485 GND
YRx/D+ Rx(RS-232) / D+(RS-485)
ZTx/D- Tx(RS-232) / D-(RS-485)
Optional (RS-232 / RS-485) PCB Connection
Connector
Pin No. 1 Connector
Pin No. 7
USB Output
24V DC input analog
& digital output cable
Sensor cable
Pin No. Z
Pin No. Y
Pin No. X
Optional (RS-232 / RS-485)
Connection PCB
Connector
Pin No. 8 Connector
Pin No. 13
7
RL1-NO Relay terminal 1
6RL1-C Relay terminal 1
3Out mA(+) Analog output current (+)
20 V DC supply GND
1+24 V DC supply
5Out V/mV (+) Analog output voltage/T/C output (+)
4Out mA/V/mV (-) Analog output current/ /T/C output (-)voltage
Pin number Indication Colour Code
13 WWhite
10 GGreen
9RNot Connected
8OOrange - Earthing
12 BBrown
11 YYellow

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Accurate Sensors Technologies
AST
The pyrometer measure temperature by receiving heat radiation, from the object, whose temperature has to be
measured. This heat radiation is passes through the lens to the sensor and is then converted to an electrical signal.
The farther the measured object is from the pyrometer, the larger the area that will be measured by the pyrometer.
Depending on customer need, the pyrometer is designed for different FOV. User has to select the FOV while ordering.
Contamination on lens will cause inaccurate temperature reading therefore air purge unit is used for sensor head.
Cleaning with dry cloth is sufficient for lens cleaning.
5.1 Optical specification
Chapter-5
Optics
*FOV mentioned on the pyrometer.
For example: If pyrometer FOV is 15:1, then spot size at 1500mm calculated as given below method except that
minium spot should be 6mm.
Installed Spot Size = Installed Working Distance
FOV
1500
15
== 100mm
6100 200 350 500
200 400 700 1000
2000
1000
0
FOV-2:1
614 27 47 67
200 400 700 1000
2000
133
0
FOV-15:1
5.2 Exchange of the Sensing Head
From factory side the sensing head has already been connected to the electronics and the calibration code has been
entered.
Entering of the Calibration Code
Every head has a specific calibration code, which is printed on the
head. For a correct temperature measurement and functionality of
the sensor this calibration code must be stored into the electronic box.
The calibration code consists of 4 blocks with 4 digit values.
Example:
For entering the code please press the Function Key and select PSW
option, then write 0011 at PSW by using UP & DOWN key and press the
Function Key to enter into calibration data of Sensing Head.
Now, the display shows 4 Digit of the first block (Block A) with UP and
DOWN key, value can be Change and press Function Key to save.
Switches to the next block and repeat same process for next Block.
3045
Block D
2085
Block C
1040
Block B
1040
Block A

8
Chapter - 6
Accessories
Power supply unit
(Reference no: 9000-02)
Temperature indicator
(Reference no: 9000-01)
6.1 Electrical Accessories
6.1.1 Power supply unit
6.1.2 Temperature display instrument
AST E 250/450 PL is powered by 24V DC (well stabilized ripple max
50mV).The input power supply is 110/230v AC check the polarity
before connecting the device.
To display the measured temperature 7 segment digital indicator is
used. Device has following specifications:
Power supply I/P : 85 to 265 V, AC/DC
Analog I/P : 4….20 mA
Retransmission : 4….20 mA
Power supply O/P : 24V, DC
Display : 4 Digits
Alarm : 2