Calex Thermosight HT User manual

Thermosight HT
Thermosight HT
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User Manual

Thermosight HT
Content
1 General ........................................................................................................................................ 3
1.1 Information to the user manual ...................................................................................... 3
1.2 Limit of liability and warranty .......................................................................................... 3
1.3 Legend ............................................................................................................................ 3
1.4 Terminology .................................................................................................................... 3
1.5 opyright ........................................................................................................................ 3
1.6 Disposal / decommissioning ........................................................................................... 4
2 Technical data ............................................................................................................................ 4
3 Overview ..................................................................................................................................... 4
3.1 Instrument ....................................................................................................................... 4
3.2 Display ............................................................................................................................ 5
3.3 Appropriate use .............................................................................................................. 5
3.4 Scope of delivery ............................................................................................................ 5
4 Safety .......................................................................................................................................... 5
4.1 General ........................................................................................................................... 6
4.2 Laser targeting light ........................................................................................................ 6
4.3 Ambient temperature ...................................................................................................... 6
5 Commissioning .......................................................................................................................... 6
5.1 Battery insertion ............................................................................................................. 7
5.2 Switch on ........................................................................................................................ 7
5.3 Sighting ........................................................................................................................... 7
5.4 Spot size ......................................................................................................................... 7
6 isplay functions / Setting keys .............................................................................................. 9
7 Parameter description / adjustments .................................................................................... 10
7.1 EMI (emissivity ε ) ......................................................................................................... 10
7.2 MAX (maximum value) ................................................................................................. 10
7.3 MIN (minimum value) ................................................................................................... 10
7.4 AVG (average function) ................................................................................................ 10
7.5 DIF (difference temperature function) .......................................................................... 10
7.6 HI (hi alarm) .................................................................................................................. 11
7.7 LR (clearing the stored measured values) ................................................................ 11
7.8 STO# (determine the storage position) ........................................................................ 11
7.9 R L# (recall measured values) .................................................................................... 11
7.10 INT (time interval for storage of measured values) .................................................... 11
7.11 / F (temperature display in ° or °F) ....................................................................... 11
7.12 Time ............................................................................................................................ 11
8 Interface .................................................................................................................................... 12
8.1 onnector pin assignment ........................................................................................... 12
8.2 Software PortaWin (accessory) .................................................................................... 12
9 Special displays of the pyrometer ......................................................................................... 13
10 Transport, packaging, storage ............................................................................................. 13
11 Maintenance .......................................................................................................................... 14
12 Trouble shooting .................................................................................................................. 14
13 Reference numbers ............................................................................................................... 14
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Thermosight HT
1 General
1.1 Information to the user manual
ongratulations on choosing the high quality and highly efficient ALEX Pyrometer.
Please read this manual carefully and step for step including all notes to security, operation and
maintenance before using the pyrometer. For operation of the instrument this manual is an impor-
tant source of information and work of reference. To avoid handling errors keep this manual in a lo-
cation where you always have access to. If operating the instrument it is necessary to follow the
generally safety instructions (see 4 Safety).
Additionally to this manual the manuals of the of the used components are valid. All notes – espe-
cially safety notes – are to consider.
1.2 Limit of liability and warranty
All general information and notes for handling, maintenance and cleaning of this instrument occurs
to the best of our knowledge under consideration of our know-how.
ALEX is not liable for any damages that arise from the use of any examples or processes men-
tioned in this manual or in case the content of this document should be incomplete or incorrect.
ALEX reserves the right to revise this document and to make changes from time to time in the
content hereof without obligation to notify any person or persons of such revisions or changes.
All series THERMOSIGHT Instruments from ALEX have a warranty of two
years from the invoice date. This warranty covers manufacturing defects and
faults which arise during operation only if they are the result of defects
caused by ALEX.
This warranty is void if the instrument is disassembled, tampered with, al-
tered or otherwise damaged, without prior written consent from ALEX.
1.3 Legend
Note
The note symbol indicates tips and useful information in this manual. All notes
should be read with regard to an effective operation of the instrument.
Security note laser beam
Indicates to the danger of a built-in laser targeting light.
1.4 Terminology
The used terminology corresponds to the VDI- / VDE-directives 3511, page 4.
1.5 Copyright
All copyrights reserved. This document may not be copied or published, in part or completely, with-
out the prior written permission of ALEX. ontraventions are liable to prosecution and compensa-
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Thermosight HT
tion.
All rights reserved practicing industrial property rights.
1.6 isposal / decommissioning
Inoperable ALEX pyrometers have to be disposed corresponding to the local regulations of electro
or electronic material.
2 Technical data
Temperature range: 250 … 1800°
Spectral range: 1.45 ... 1.8 µm
Detector: InGaAs detector
Accuracy: 0.75% of reading (TU = 23° , EMI = 100%)
Repeatability: 0.2% of reading
Temperature coefficient: 0.03% of reading in ° per ° deviation of ambient temperature of
23°
Exposure time t90: 20 ms (with dynamical adaptation at low signal levels)
Emissivity: 10 ... 100%, adjustable in 1% steps
Temperature display: 3 values / s large display: 4 digit, height 9 mm
small display: 4 digit, height 4.5 mm
Temperature resolution: on display: 0.1° : 250 ... 999.9° ; 1° : 1000 ... 1800°
0.1°F: 482 ... 999.9°F, 1°F: 1000 ... 3272°F
via interface: 0.1° or 0,1°F
Temp. below 250° : on display: 7777
Temp exceeds 1800° : on display: 8888
Display illumination: automatically at dark ambient light conditions
Measuring unit: ° / °F, switchable
Measuring functions: Normal, MAX, MIN, AVG, DIF
Alarm functions: Hi-alarm (adjustable)
Data storage: 750 values; storage of: temperature value, date, time, parameter,
emissivity, address, interval, temperature unit in ° or °F
Storage interval: PRT; OFF; 0.02 s; 0.04 s; 0.1 s; 0.2 s; 0.5 s; 1 s; 2 s; 5 s; 10 s; 20 s; 50s
Serial interface: RS232 interface with 57600 Baud
Analog output: 1 mV/° or 1 mV/°F; resolution 1 degree
Power supply: 9 V battery (IE 6LR61) or
9 V-NiMH rechargeable battery (e.g. Varta type 5622)
Battery life:
(without backlight)
50 hours (without laser) with 9 V battery
15 hours (without laser) with 9 V rechargeable battery
harging connector: connector for battery charging unit 3 858 490
Ambient temperature: 0 ... 60 °
Storage temperature: -20 ... 70 °
Housing: ABS, UL class V0
Weight: 340 g
Fixing thread: photo tripod thread 1/4“ - 20 UN
Protection class: IP20
E-label: according to EU directives about electromagnetic immunity
3 Overview
3.1 Instrument
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Thermosight HT
3.2 isplay
3.3 Appropriate use
The portable pyrometer THERMOSIGHT HT is a robust, digital and highly accurate infrared ther-
mometer with built-in data logger (750 temperature values) for non-contact temperature measure-
ment on metals, ceramics, graphite etc. with a temperature range of 250 … 1800° .
3.4 Scope of delivery
Instrument (incl. battery), carrying case, inspection sheet, user manual.
4 Safety
This section offers an overview about all important safety aspects.
Additionally in the several sections there are concrete safety aspects to avert danger. These as-
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onnector for
RS232 interface and
analog output
onnector for
battery charger
Display
Keys
Laser warning
Battery low
Hold function
Parameter /
Function
Laser targeting light
function
Temperature display
Display in ° or °F
Laser targeting light
active
Parameter value /
Function value
hoose parameter
or function
changing values
Sensor for automatic
display illumination
Protection cap
Spot size table
Fixing lever for
continuous
measurement
Switch
Battery case
arrying loop
Tripod thread

Thermosight HT
pects are indicated with symbols. Labels and markings at the instrument have to be noticed and
keep in a permanent readable condition.
4.1 General
Each person working with the pyrometer must have read and understood the user manual before
operation. Also this has to be done if the person already used similar instruments or was already
trained by the manufacturer.
The pyrometer has only to be used for the purpose described in the manual. It is recommended to
use only accessories offered by the manufacturer.
4.2 Laser targeting light
For easy alignment to the measuring object the pyrometers is equipped with a laser targeting light.
This is a visible red light with a wavelength between 630 and 680 nm and a maximum power of
1 mW. The laser is classified as product of laser class 2.
Caution: Do not look directly into the laser beam!
Laser class 2 according to IE 60825-1-3-4
Safety regulations:
•Never look directly into the laser beam. The beam and spot can be watched safely from side.
•Make sure that the beam will not be reflected into eyes of persons by mirrors or shiny sur-
faces.
4.3 Ambient temperature
The pyrometer is designed for ambient temperatures of 0 … 60° with non-condensing conditions.
An operation out of these conditions can damage or malfunction to the pyrometer.
5 Commissioning
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Thermosight HT
5.1 Battery insertion
For operating the THERMOSIGHT
HT a
9 V battery or 9 V rechargeable bat-
tery is necessary. For insertion of
the battery remove the locking screw
and the battery case cover.
Now the instrument is ready to use.
5.2 Switch on
The instrument’s push button has
two trigger points.
First trigger point:
The instrument is switched on if the button is pushed to the first trigger point. The measurement
starts after a short self test of approximately 1 second. After releasing the push button the last mea-
sured value will be displayed for 10 seconds (HOLD function) and the sign “HOLD” is shown on the
display. After these 10 seconds the instrument is switched off automatically.
The display indicates “7777” if the measured temperature is below 250° , it indicates “8888” above
1800° .
Second trigger point:
The second trigger point activates the data logger and stores the actual temperature reading. It can
be adjusted if only the actual temperature value is stored or if a continuous storing should be done
as long as the push button is hold on the second trigger point
(setting of time interval see 8.10).
The data logger can store up to 750 temperature values. Should the pyrometer be switched to sin-
gle value data logging, the data logging is confirmed by a beep and in the display the used number
of the stored value is indicated for a short time (e.g. for the first stored value STO# 01 is shown).
The pushbutton can be locked in the second trigger point position with the locking lever by pushing
the lever upwards. This activates the continuous measuring mode. Pressing the trigger once again
releases the locking and switches off the continuous measuring mode.
5.3 Sighting
For exact aiming to the object the pyrometer is equipped with a laser targeting light. The laser
shows a red flashing circle at the position of the measuring spot on the object. The size of the circle
varies depending on the distance and has approximately the size of the measuring spot.
If the instrument is in operation the laser targeting light function can be activated or deacti-
vated by pressing the laser key. If this function is activated the laser targeting light is auto-
matically switched on as long as the trigger button is pushed.
Caution: Do not look directly into the laser beam!
Laser class 2 according to IE 60825-1-3-4
5.4 Spot size
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Battery case cover
Battery connector
Locking screw for
battery case cover
Locking lever
Push button with 2
trigger points
Battery case

Thermosight HT
The size of the measuring spot of the pyrometer and with that the minimum size of the measuring
object is dependent on the distance. The smallest spot size of 4 mm in diameter is achieved only in
a measuring distance of 800 mm. The spot is decreasing if the distance to the measuring object is
decreasing of increasing from 800 mm.
A spot size table is printed on the right side of the pyrometer corresponding to the below shown
spot size diagram.
Smallest objects with only 1.25 mm diameter can be measured with the additional close-up lens
(optional accessory).
Note: The pyrometer can measure objects at any distance but the object has
to be bigger or at least as big as the spot size of the pyrometer in the
measuring distance.
For longer measuring distances than 800 mm the size of measuring spot can
be calculated approximately with the following equation:
M = (0.019 x a) - 11 M = spot size in mm
a = measuring distance in mm
With close-up lens (optional):
If using the close-up lens, the emissivity setting of the instrument (EMI) has to
be corrected with the following factor (emissivity see 7.1):
EMI = 0.92 x EMIObjekt
For longer measuring distances than 250 mm with the close-up lens the size of
measuring spot can be calculated approximately with the following equation:
M = (0.05 x a) - 11 M = spot size in mm
a = measuring distance in mm
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Spot size M [mm]
Measuring distance a [mm]
0400
7.5 4
800
11
1500
17
Measuring distance a [mm]
Spot size M [mm]
0
11
250
125
500
6.1 1.25
13.5

Thermosight HT
6 Dis lay functions / Setting keys
Additionally to the temperature measurement the THERMOSIGHT HT provides some more func-
tions which are necessary for a correct measurement and usefully enlarging the functionality of the
pyrometer.
Temperature display
Parameter / function
Laser targeting light function on / off
Indication ° or °F
Parameter value / function value
Setting keys:
1) Parameter selection PAR
2) change of parameter values: 
Indication °C or °F: indicates the temperature in ° or °F.
Temperature display: shows the actual or stored temperature value.
Parameter / function: selecting a parameter or a measuring function for indication or changing a
corresponding short form will be displayed.
Parameter value / function value: indicates the value of the adjusted parameters or the tempera-
ture of the selected measuring function.
PAR key: Repeated pushing of the PAR key displays all available parameters (as EMI, HI, INT,
/F) or additional measuring functions in the following sequence mentioned below. Parameters are
part of the basic settings of the pyrometer. They are only displayed during adjustment. Measuring
functions are displayed additionally to the measuring temperature (MAX, MIN, AVG, DIF), can give
an acoustic signal (HI) or can be used for data analysis (R L). Selected measuring functions are
stored when the pyrometer is switched off and will be activated by restarting the instrument.
PAR
isplay Parameter /
function Short explanation Factory
settings
1 x EMI Emissivity indication and setting of emissivity 100
2 x MAX Max. value indication of maximum value -
3 x MIN Min. value indication of minimum value -
4 x AVG Average indication of average value -
5 x IF Difference indication of the difference between the actual measur-
ing temperature and the start measuring temperature -
6 x HI Hi alarm indication and setting of acoustic alarm 1800°
7 x CLR lear deletes the stored measured values
8 x STO#Store fixing of storage position
9 x RCL#Recall indication of stored measured values
10 x INT Interval indication and setting of time interval for storage of
measured values in continuous mode OFF
11 x C / F elsius /
Fahrenheit
indication and setting of temperature reading
in ° or °F
Arrow keys:
With the arrow keys  and  the corresponding settings for all parameters can be changed. A
change in setting of a parameter is stored automatically.
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Thermosight HT
7 Parameter descri tion / adjustments
7.1 EMI (emissivity ε)
For a correct measurement it is necessary to adjust the emissivity. This emissivity is the relation-
ship between the emission of an real object and the emission of a black body radiation source (this
is an object which absorbs all incoming rays and has an emissivity of 100%) at the same tempera-
ture. Different materials have different emissivities ranging between 0% and 100% (settings at the
pyrometer between 10 and 100%). Additionally the emissivity is depending on the surface condition
of the material, the spectral range of the pyrometer and the measuring temperature. The emissivity
setting of the pyrometer has to be adjusted accordingly. Typical emissivity values of various com-
mon materials for the spectral range of the THERMOSIGHT HT are listed below. The tolerance of
the emissivity values for each material is mainly dependent on the surface conditions. Rough sur-
faces have higher emissivities.
Measuring object EMI (1.45...1.8 µm)
„Black body furnace“ 1
Steel heavily scaled 0.85 ... 0.9
Steel rolling skin 0.8 ... 0.88
Steel, molten 0.2 ... 0.25
Slag 0.8 ... 0.85
Aluminum, bright 0.1
hromium, bright 0.25 ... 0.3
Brass oxidized 0.6 ... 0.7
Bronze, bright 0.03
opper, oxidized 0.7 ... 0.85
Measuring object EMI (1.45...1.8 µm)
Zinc 0.45 ... 0.55
Nickel 0.15 ... 0.2
Gold, Silver, bright 0.02
Porcelain glazed 0.6
Porcelain rough 0.8 ... 0.9
Graphite 0.8 ... 0.9
Fireclay 0.45 ... 0.6
Stoneware, glazed 0.8 ... 0.9
Brick 0.8 ... 0.9
Soot 0.95
7.2 MAX (maximum value)
The MAX function shows the highest reading taken during a measurement.
This feature is particularly useful for applications with fluctuating object temperatures or for the
measurement of moving objects which are not constantly in the measuring beam of the pyrometer.
With every new measurement the maximum value storage is cleared automatically, i.e. pushing the
trigger again.
Note: The response time of the pyrometer and with that the maximum value
storage function is faster than the update of the display.
7.3 MIN (minimum value)
The MIN function shows the lowest reading taken during a measurement.
Note: The response time of the pyrometer and with that the minimum value
storage function is faster than the update of the display.
7.4 AVG (average function)
The average function always shows the average of the readings of the last 4 seconds.
7.5 IF (difference temperature function)
If the DIF function is activated, a start temperature value is stored by pushing the trigger and the
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