AST EL50-H+ User manual

AST EL50-H+
AST - Accurate Sensors Technologies
Misgav Industrial Park, Misgav 20173, Israel
Tel: [phone], Fax: [phone]
Email: [e-mail]
Web: www.accuratesensors.com SW Ver. 1.1.3
USER MANUAL
Accurate Sensors Technologies
Non-contact Infrared Pyrometers
We measure accurate temperature in extreme conditions
AST

Accurate Sensors Technologies
AST
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
7.2.1 COM port address
7.2.2 Pyrometer parameters
7.2.3 Record view
7.2.4 Measurement
8. Chapter - 8 ....................................................................................................................... 18
Calculate spot size
9. Chapter - 9 ....................................................................................................................... 19
Ordering Information
10.Chapter - 10 ....................................................................................................................... 20
Serial communication protocol
....................................................................................................................... 1

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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-H 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

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AST EL50-H+ is specially designed digital pyrometer in 4 wire technology with extended optical head which
can with stand high ambient temperature upto 250°C. It has 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-H+ pyrometer is especially designed for industrial purposes. It is suitable for high temperature
measurement ranging from 0°C to 800°C.
The AST EL50-H+ are pyrometers contain extended sensor head and equipped with a display which shows in
the current temperature.The cable & optical head are unaffected by electromagnetically interferences (e.g.
induction) and can be used in ambient temperatures up to 250°C. Additionally all parameters can be read if they are
changed via the integrated keys at the instrument. With the use of serial interface and the provided software
temperature can be displayed and stored in a PC where paramaterizing can also be done.
AST EL50-H has response time of 60 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
Chapter-2
Introduction
Sensing Head
20
45
15
M20 x 1.0

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Chapter-3
Technical Specifications
82.50
112.50 2 x 6 THRU Mounting Hole
5
5
16
33
Note : 1 In case of T/C J/K type analog output target temperature should be greater than ambient temperature.
2Please do not keep sensor head in hand during the measurement of temperature for better accuracy.
1 At ambient temperature 23± 5°C, ε=1 and response time = 600msec.
2 For ambient temperature (sensor head) <18°C and >28°C
Model EL50-H+
Temperature Range(Analog sub-range adjustable)
Spectral Range
Photodetector Type
Distance to Spot Size Ratio
Emissivity (ε)
Response Time
Accuracy
Repeatability
Analog Output
Digital Output
Operating Temp. Range
Storage Temp. Range
Relay Output
Adjustable Parameters and Features via
Software
Adjustable Parameters and Features via
Keypad
Power Supply
Power Consumption
Protection Class
Housing
Isolation
Operating Humidity
Weight & Dimensions
0°C….800°C
8…14 µm
Thermopile
15:1
0.1….1.2 adjustable
60 msec adjustable upto 10 sec
±1% or ±1.5°C (at ambient temperature 23 ±5 °C)
0.3% of reading in °C + 1°C
USB 2.0
RS-232/RS-485 interface card (Optional)
*At a time only one digital output possible
Electronic box upto 70°C
Sensor head upto 250°C
-20°C…70°C (Electronics), -20°C...250°C (Sensor Head)
Relay Output with hysteresis 60V DC/42V AC RMS, 0.4A
Emissivity, Response Time, Clear Time (Peak Picker), Analog Output, Analog Scale (Sub
Range), Unit Of Temperature (°C/°F), Communication mode(Comm. mode), Record
feature etc.
Emissivity, Relay, Setpoint, Hysteresis (Hyst), Analog Sub Range, Analog Output, Unit of
temperature, Sensor address, Response Time, Clear Time(Peak Picker) etc.
12V DC to 28 V DC with reverse polarity protection
Max 2.5 watt
IP65
Sensor head-Stainless Steel;
Electronic Box : Zinc
Power supply, *Digital output and Analog output are galvanically islolated against
each other
* Not applicable for USB 2.0 digital output
10-95%, non condensing conditions
600g, 112.5mmx82.5mmx33mm(L x W x H)
0-20mA, 4-20mA, 0-10V, Thermocouple Type “K” or “J” (User selectable)

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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 1.2. 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.
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

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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 60 msec to 10sec.
Picker : Please refer to page no. 13.
Head temp. : It shows the temperature of head.
Internal temp. : It shows the internal temperature of pyrometer.
4-20mA or 0-20mA or 0-10V or T/C K-type or J-type
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.
4.3 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.
3045
Block D
2085
Block C
1040
Block B
1040
Block A

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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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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

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Chapter-6
Accessories
Power supply unit
(Reference no: 9000-02)
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.
Fig. 21 Temperature Indicator
(Reference no: 9000-01)
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

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6.1.4 Converter RS-485 ↔ RS-232 :
The pyrometer can communicate with PC using RS-485 or RS-232.
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.
Converter RS-232 ↔ RS-485
9000-03)(Reference no:
6.1.3 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
Display & Parameterizer
P-120
(Reference no:9001-01)

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50
35
27
35
2
28
Ø30
10
M20 x 1.0
for 3 mm
diameter hose
internal
6.2 Mechanical Accessories
6.2.1 Adjustable mounting support for sensor head
Adjustable mounting for sensor head
(Reference no: 8300-04)
Air purge unit for sensor head
(Reference no: 8300-03)
6.2.2 Air purge unit for sensor head

Chapter - 7
Software Installation
The provided AST software “InfraSoft” offers digital PC interface using RS-232 RS-485 & USB 2.0. 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.
7.1 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.
,
7.2 Parameters in main screen
7.2.1 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 Begin & Sub Range End 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).
(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.
7.2.2 Temperature
It shows the temperature measured by the pyrometer
7.2.3 Parameter Setting
All user selectable device parameters can be set by using the software in the Panel "Parameter"
For communication of multiple pyrometers in RS-485 mode, select different com port and address.
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(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. 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
measurement has been exceeded.
(G2) 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.
Example : If we set the tCl a s “6 sec” the highest last temperature value will be display for 6.0 sec to 12 sec then it
capture next pick.
Clear Time 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.
The following setting are possible :
OFF : At clear time “OFF” the maximum value storage is switched off and only momentary values are measured.
tCL (10msec...25sec) : Clear Time tCL can be set between 10msec and 25sec. When set, estimates the maximum
values and holds it in two buffer memory. After the entered time, the storage will be deleted.
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.

(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 & OFF by using the software. When Peak picker is ON, the peak picker menu is enabled
for setting of the parameters like decay rate function, reset below temperature and peak picker delay.
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(I)Decay rate The Decay rate range is 0.00 to 166.66°C/sec. or 0.00
to 300°F/sec. depending upon °F/°C unit’s selection. The slowest
Decay rate is 0 degrees per sec. This feature helps to eliminate
erratic measurements and allows the peaked value to decay down
to lower process temperature values as they occur. Decay rate is set
to retain peak measured temperature value and ignore momentary
decreases in measured temperature.
(ll)Delay Time This function set the delay time in sec. before peak
picker function starts. The delay time is selectable in the range 0.02
to 10.00 sec. Zero (0) turns delay time OFF. This function is used to
delay the start of peaking action for upto 10 sec. following the
detection of leading edge of a new target.
Temp
Time
Delay Time (sec.)
Temp
Time
Without RBT RBT with Decay Rate
Temp
Time
RBT
Outer
with Peak Picker
Current Measuring
Value
(lll) Reset Below Temperature(RBT) The user can set RBT within the limit of pyrometer sub range. This function sets
the temperature above which peak picker action starts. When the target temperature matches or is below the
selected value, the sensor indicates temperature without picking action.
Temp
Time
Without RBT
Temp
Time
RBT
RBT with Decay Rate
Outer
with Peak Picker
Current Measuring
Value

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7.2.5 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.
(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 and J & K type
thermocouple.
(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:-6
To view parameters of multiple devices select the pyrometer name from the drop down list that appears at the top of
the screen.
7.2.4 Device information
Pyrometer specific information will be displayed in the Info Panel
Record will be saved as .txt format and the
name of file will be user define.
Set minimum record time 1 Sec.
To record emissivity, click on Record Emissivity button.
If user wants file in Spreadsheet format, user can export notepad (.txt) file by choosing Excel Spreadsheet in file
menu.
To export excel file, "Stop" recording and then select "Excel Worksheet" in file menu so all recorded data of .txt file
will be exported to excel file.

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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.

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Note:
After connecting the pyrometer right click on the graph screen and choose "Set to default" option from pop-up
menu.
Temperature graph of connected pyrometer is displayed on right side of the screen. This shows the measured
temperature corresponding to the time.

Chapter - 8
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.
Calculate Spot Size
WD = Manufactured working distance in (mm).
A = It shows the value of lens opening (Aperture in mm)
S = Manufactured spot size of the pyrometer (mm)
User has to enter the value of WD, A, S, of the installed pyrometer (These values are given in section – 2.3). Now,
putting the value of “Installed working distance” it will show the value of “Installed spot size”.
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