LumaSense IS 50-LO plus User manual

MANUAL
IMPAC Pyrometer
IS 50-LO plus •IGA 50-LO plus

Confidential Information
The material contained herein consists of information that is the property of LumaSense
Technologies, an Advanced Energy Company, and intended solely for use by the purchaser of
the equipment described in this manual.
All specifications are subject to change without notice. Changes are made periodically to the
information in this publication, and these changes will be incorporated in new editions.
LumaSense Technologies prohibits the duplication of any portion of this manual or the use
thereof for any purpose other than the operation or maintenance of the equipment described
in this manual, without the express written permission of LumaSense Technologies or Advanced
Energy Industries, Inc.
Any unauthorized use of this manual or its contents is strictly prohibited.
Copyright
© 2018 LumaSense Technologies, Inc. All Rights Reserved. LumaSense Technologies, Inc., a
subsidiary of Advanced Energy Industries, Inc.
Trademarks
IMPAC is a trademark of LumaSense Technologies.
All other trademarks are trademarks, registered trademarks, and/or service marks of their
respective holders.
Service Centers
LumaSense Technologies, Inc.
North America
Sales & Service
Santa Clara, CA, USA
Ph: [phone]
Ph: [phone]
Fax: [phone]
LumaSense Technologies GmbH
Other Than North America
Sales & Support
Frankfurt, Germany
Ph: [phone]
Fax: [phone]
Global and Regional Centers
Our Headquarters
LumaSense Technologies, Inc.
Santa Clara, CA, USA
Ph: [phone]
Fax: [phone]
Americas, Australia, & Other Asia
LumaSense Technologies, Inc.
Santa Clara, CA, USA
Ph: [phone]
Fax: [phone]
Europe, Middle East, Africa
LumaSense Technologies GmbH
Frankfurt, Germany
Ph: [phone]
Fax: [phone]
France
Sales & Support Center
Erstein, Frankreich
Ph: [phone]
Fax: [phone]
India
LumaSense Technologies, India
Mumbai, India
Ph: + 91 22 67419203
Fax: + 91 22 67419201
China
LumaSense Technologies, China
Shanghai, China
Ph: [phone]
Ph: [phone]
E-mail [e-mail]
[e-mail]
[e-mail]
Website http://www.lumasenseinc.com
Part No 3 857 047
Revision B
October 2018

IS 50-LO plus / IGA 50-LO plus Manual Contents •iii
Contents
1General Information ......................................................................................................... 5
1.1 Information about the user manual....................................................................... 5
1.1.1 Legend ......................................................................................................................5
1.1.2 Terminology .............................................................................................................5
1.2 Safety ......................................................................................................................... 5
1.2.1 Laser Targeting Light...............................................................................................5
1.2.2 Electrical connection................................................................................................6
1.3 Limit of liability and warranty................................................................................ 6
1.4 Unpacking the Instrument ....................................................................................... 7
1.5 Service Request, Repair, or Support ....................................................................... 7
1.6 Shipments to LumaSense for Repair ...................................................................... 7
1.7 Transport, packing, and storage ............................................................................. 8
1.8 Disposal / Decommissioning.................................................................................... 8
2Introduction....................................................................................................................... 9
2.1 Appropriate use ........................................................................................................ 9
2.2 Scope of delivery ...................................................................................................... 9
2.3 Technical data ........................................................................................................... 9
2.4 Dimensions .............................................................................................................. 11
2.5 Physical user interface ........................................................................................... 12
2.6 Accessories (Optional)............................................................................................ 12
2.6.1 Mounting................................................................................................................12
2.6.2 Air purge ................................................................................................................12
2.6.3 Displays ...................................................................................................................12
3Controls and Installation................................................................................................ 13
3.1 Electrical Installation.............................................................................................. 13
3.1.1 Pin assignment for the connector on the back of the pyrometer......................13
3.1.2 Connecting the pyrometer to a PC.......................................................................14
Connecting to RS232 interface................................................................................................. 14
Connecting to RS485 interface................................................................................................. 15
3.1.3 Connection of additional analyzing devices........................................................15
3.2 Mechanical Installation.......................................................................................... 15
3.2.1 Overview.................................................................................................................15
3.2.2 Converter................................................................................................................16
3.2.3 Fiber ........................................................................................................................16
Minimum Bending Radius......................................................................................................... 16
Ambient Temperature .............................................................................................................. 17
3.3 Sighting ................................................................................................................... 17
3.3.1 Laser targeting light ..............................................................................................17
3.4 Optics ....................................................................................................................... 18

IS 50-LO plus / IGA 50-LO plus Manual Contents •iv
3.4.1 Calculating spot sizes.............................................................................................18
3.4.2 Adjusting the required measuring distance ........................................................19
4Instrument Settings ........................................................................................................ 21
4.1 Settings at the instrument .................................................................................... 22
4.2 Factory settings ...................................................................................................... 22
5Parameter Descriptions / Settings................................................................................. 23
5.1 Emissivity ε.............................................................................................................. 23
5.2 Exposure time (t90).................................................................................................. 24
5.3 Clear time of the maximum / minimum value storage (tClear)............................ 24
5.4 Analog Output ........................................................................................................ 25
5.5 FROM / TO (beginning and end of sub range)...................................................... 25
5.6 Address .................................................................................................................... 25
5.7 Baud rate (kBaud) ................................................................................................... 25
5.8 Temperature display in °C or °F............................................................................. 26
5.9 Wait time (tw) .......................................................................................................... 26
5.10 Maximum internal temperature (MaxIntTemp).................................................. 26
5.11 Error status (Status) ............................................................................................... 26
6Software InfraWin........................................................................................................... 27
6.1 Connecting the pyrometer to a PC ....................................................................... 27
6.2 Installation .............................................................................................................. 27
6.3 Program start .......................................................................................................... 27
7Maintenance .................................................................................................................... 29
7.1 Cleaning the front window ................................................................................... 29
7.2 Changing of optics or fiber ................................................................................... 29
8Troubleshooting .............................................................................................................. 31
9Data format UPP (Universal Pyrometer Protocols)...................................................... 33
10 Reference Numbers......................................................................................................... 35
10.1 Reference numbers instrument ............................................................................ 35
10.2 Reference numbers accessories ............................................................................ 35
Index ....................................................................................................................................... 37

IS 50-LO plus / IGA 50-LO plus Manual General Information •5
1General Information
1.1 Information about the user manual
Congratulations on choosing the high quality and highly efficient Series 50-LO plus pyrometer.
This manual provides important information about the instrument and can be used as a work of
reference for installing, operating, and maintaining your Series 50-LO plus pyrometer. It is
important that you carefully read the information contained in this manual and follow all safety
procedures before you install or operate the instrument.
To avoid handling errors, keep this manual in a location where it will be readily accessible.
1.1.1 Legend
Note: The note symbol indicates tips and useful information in this manual. All notes
should be read to effectively operate the instrument.
Attention: This sign indicates special information which is necessary for a correct
temperature measurement.
Warnings and Cautions: The general warnings and cautions symbol signifies the
potential for bodily harm or damage to equipment.
MB Shortcut for Temperature range (in German: Messbereich)
1.1.2 Terminology
The terminology used in this manual corresponds to the VDI- / VDE-directives 3511, Part 4.
1.2 Safety
This manual provides important information on safely installing and operating the
Series 50-LO plus pyrometer. Several sections of this manual provide safety warnings to avert
danger. These safety warnings are specified with a warning symbol. You must read and
understand the contents of this manual before operating the instrument even if you have used
similar instruments or have already been trained by the manufacturer.
It is also important to continually pay attention to all labels and markings on the instrument and
to keep the labels and markings in a permanent readable condition.
Warning: The pyrometer is only to be used as described in this manual. It is
recommended that you only use accessories provided by the manufacturer.
1.2.1 Laser Targeting Light
For easy alignment to the measuring object the pyrometers are equipped with a laser targeting
light. This is a visible red light with a wavelength between 630 and 660 nm and a maximum
power of 1 mW. The laser is classified as product of laser class 2.

IS 50-LO plus / IGA 50-LO plus Manual General Information •6
Warning: To reduce the risk of injury to the eyes, do not look
directly into the targeting laser and do not point the targeting laser
into anyone's eyes. The instrument is equipped with a class II laser
that emits radiation.
•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 people by mirrors or
shiny surfaces.
1.2.2 Electrical connection
Follow common safety regulations for mains voltage (e.g. 230 or 115 V AC) connecting
additional devices operating with this mains voltage (e.g. transformers). Touching mains voltage
can be mortal. A non-expert connection and mounting can cause serious health or material
damages.
Only qualified specialists are allowed to connect such devices to the mains voltage.
1.3 Limit of liability and warranty
All general information and notes for handling, maintenance, and cleaning of this instrument
are offered according to the best of our knowledge and experience.
LumaSense Technologies is not liable for any damages that arise from the use of any examples
or processes mentioned in this manual or in case the content of this document should be
incomplete or incorrect. LumaSense Technologies 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 instruments from LumaSense Technologies have a regionally effective warranty period.
Please check our website at http://info.lumasenseinc.com/warranty for up-to-date warranty
information. This warranty covers manufacturing defects and faults which arise during
operation, only if they are the result of defects caused by LumaSense Technologies.
The Windows compatible software was thoroughly tested on a wide range of Windows
operating systems and in several world languages. Nevertheless, there is always a possibility that
a Windows or PC configuration or some other unforeseen condition exists that would cause the
software not to run smoothly. The manufacturer assumes no responsibility or liability and will
not guarantee the performance of the software. Liability regarding any direct or indirect
damage caused by this software is excluded.
The warranty is VOID if the instrument is disassembled, tampered with, altered, or otherwise
damaged without prior written consent from LumaSense Technologies; or if considered by
LumaSense Technologies to be abused or used in abnormal conditions.
There are no user-serviceable components in the instrument:
•No adjustments may be made to the targeting laser. It is fixed at the factory.
•No adjustments may be made to the targeting laser's power level.

IS 50-LO plus / IGA 50-LO plus Manual General Information •7
1.4 Unpacking the Instrument
Thoroughly inspect the instrument upon delivery to purchaser. Check all materials in the
container against the enclosed packing list. LumaSense Technologies cannot be responsible for
shortages against the packing list unless a claim is immediately filed with the carrier. Final claim
and negotiations with the carrier must be completed by the customer.
Save all packing materials, including the carrier’s identification codes, until you have inspected
the pyrometer and find that there is no obvious or hidden damage. Before shipment, the
pyrometer was examined and has been tested. If you note any damage or suspect damage,
immediately contact the carrier and LumaSense Technologies, Inc.
1.5 Service Request, Repair, or Support
Contact LumaSense Technologies Technical Support in case of a malfunction or service request.
Provide clearly stated details of the problem as well as the instrument model number and serial
number. Upon receipt of this information, Technical Support will attempt to locate the fault
and, if possible, solve the problem over the telephone.
If Technical Support concludes that the instrument must be returned to LumaSense Technologies
for repair, they will issue a Return Material Authorization (RMA) number.
Return the instrument upon receipt of the RMA number, transportation prepaid. Clearly
indicate the assigned RMA number on the shipping package exterior. Refer to Section 1.6,
Shipments to LumaSense for Repair, for shipping instructions.
Technical Support can be contacted by telephone or email:
Santa Clara, California
•Telephone: [phone] or [phone]
•Email: [e-mail]
Frankfurt, Germany
•Telephone: [phone]
•Email: [e-mail]
Erstein, France
•Telephone [phone]
•Email [e-mail]
1.6 Shipments to LumaSense for Repair
All RMA shipments of LumaSense Technologies instruments are to be prepaid and insured by
way of United Parcel Service (UPS) or preferred choice. For overseas customers, ship units air-
freight, priority one.
The instrument must be shipped in the original packing container or its equivalent. LumaSense
Technologies is not responsible for freight damage to instruments that are improperly packed.
Contact us to obtain an RMA number (if one has not already been assigned by Technical
Support). Clearly indicate the assigned RMA number on the shipping package exterior.

IS 50-LO plus / IGA 50-LO plus Manual General Information •8
Send RMA Shipments to your nearest technical service center:
Santa Clara, California Frankfurt, Germany
LumaSense Technologies, Inc.
3301 Leonard Court
Santa Clara, CA 95054 USA
Telephone: [phone]
[phone]
Email: [e-mail]
LumaSense Technologies GmbH
Kleyerstr. 90
60326 Frankfurt
Germany
Telephone: [phone]
Email: [e-mail]
1.7 Transport, packing, and storage
With faulty shipping, the instrument can be damaged or destroyed. To transport or store the
instrument, please use the original box or a box padded with sufficient shock-absorbing
material. For storage in humid areas or shipment overseas, the device should be placed in
welded foil (ideally along with silica gel) to protect it from humidity.
The pyrometer is designed for a storage temperature of -20 to 70 °C with non-condensing
conditions. Storing the instrument out of these conditions can cause damage or result in
malfunction of the pyrometer.
1.8 Disposal / Decommissioning
Inoperable instruments must be disposed of in compliance with local regulations for electronic
materials.

IS 50-LO plus / IGA 50-LO plus Manual Introduction •9
2Introduction
2.1 Appropriate use
The pyrometers IS 50-LO plus and IGA 50-LO plus are digital, highly accurate pyrometers with
fiber optics for non-contact temperature measurement on metals, ceramics, graphite etc.
between 250 °C and 3500 °C.
The IS 50/055-LO plus and IS 50/067-LO plus are special versions with extremely short
wavelengths where e.g. molten metal has a very high emissivity.
The instrument type IS 50-Si-LO plus is optimized for measurements on silicon wafers, e. g. in
vacuum chambers.
The IS 50-Al-LO plus is specially designed for measurements on aluminium parts and profiles.
2.2 Scope of delivery
Converter, optical fiber and optical head as per configuration, works certificate, PC software
InfraWin, and user manual.
Note: A connection cable is not included with the instrument and must be ordered
separately (see Chapter 10, Reference numbers).
2.3 Technical data
Temperature Ranges:
IS 50-LO plus
IS 50/055-LO plus
IS 50/067-LO plus
IS 50-AI-LO plus
IS 50-Si-LO plus
IGA 50-LO plus
550 ... 1400 °C (MB 14)
600 ... 1600 °C (MB 16)
650 ... 1800 °C (MB 18)
550 ... 1800 °C (MB 18L)
600 ... 2000 °C (MB 20L)
750 ... 2500 °C (MB 25)
900 ... 3300 °C (MB 33)
1000…2300 °C (MB 23)
1100…3500 °C (MB 35)
400 ... 1000 °C (MB 10)
400 ... 1300 °C (MB 13)
500 ... 1600 °C (MB 16)
300 ... 1300 °C (MB 13)
350 ... 1800 °C (MB 18)
450 ... 2500 °C (MB 25)
250 ... 1350 °C (MB 13.5L)
300 ... 2000 °C (MB 20L)
350 ... 2500 °C (MB 25L)
Temperature Subrange:
Any range adjustable within the temperature range, minimum span
51 °C

IS 50-LO plus / IGA 50-LO plus Manual Introduction •10
Spectral Ranges:
IS 50-LO plus:
0.7 ... 1.1 µm
IS 50/055-LO plus:
0.55 µm
IS 50/067-LO plus:
0.676 µm
IS 50-Si-LO plus &
IS 50-Al-LO plus: Narrow band in the near infrared
IGA 50-LO plus:
1.45 ... 1.8 µm
Signal Processing:
Photo current, digitized immediately
Detector:
IS 50-LO plus; IS 50/055-LO plus; IS 50/067-LO plus; IS 50-Si-LO plus;
IS 50-Al-LO plus: Si
IGA 50-LO plus: InGaAs
Power Supply:
24 V AC or DC (12 … 30 V AC or DC) (AC: 48 … 62 Hz)
Power Consumption:
Max. 2 W
Analog Output:
0 … 20 mA or 4 … 20 mA (linear), switchable; load: 0 … 500 Ω
Test Current Output:
Fixed 10 mA (for 0 … 20 mA analog output) or
fixed 12 mA (for 4 … 20 mA analog output)
Serial Interface:
RS232 or RS485 addressable (half duplex), switchable, baud rate 1.2
up to 115 kBd
Resolution:
Interface and display: 0.1 °C
Analog output: < 0.1% of the adjusted temperature range
Isolation:
Power supply, digital interface, analog output are galvanically
isolated against each other
Display:
Illuminated LC display for temperature indication or parameter
settings
Parameters:
Adjustable at the instrument or via serial interface: emissivity;
response time; analog output; address; baud rate; waiting time; °C or
°F; setting of the maximum value storage; temperature sub range
Emissivity
ε
:
20 … 100% adjustable inside the instrument or via interface in steps
of 0.1%
Exposure Time t90:
< 1 ms; adjustable to 0.01 s; 0.05 s; 0.25 s; 1 s; 3 s; 10 s
Maximum Value
Storage:
Single or double storage; cleared by: preselected time interval or
external deletion contact or via digital interface or automatically
with the next measuring object
Switch Sontact:
Max. 0.15 A (to recognize a hot object in the measuring beam.
Contact switches if the measuring temperature is minimum 1% above
the beginning of the temperature range (only active with automatic
clearing or tCL < 0.5 s))
Sighting:
Laser targeting light (class 2, max. power level
< 1 mW, λ= 630-680 nm)
Meas. Uncertainty*:
(ε= 1, t90 = 1 s, Tamb. = 23 °C)
Up to 1500 °C: 0.3% of reading in °C + 1 °C
Above 1500 °C: 0.5% of reading in °C
Repeatability:
(ε= 1, t90 = 1 s, Tamb. = 23 °C)
0.1% of reading in °C + 1 °C
Ambient Temperature:
IS 50-LO plus;
IGA 50-LO plus:
IS 50-Si-LO plus;
IS 50-Al-LO plus:
0 ... 60 °C on the converter, up to 250 °C on side
of fiber and optical head
20 ... 30 °C on the converter, up to 250 °C on
side of fiber and optical head
(The laser targeting light switches off automatically if the internal temperature of the
instrument goes above 55 °C, above 70 °C at the 4 ... 20 mA output a thermo switch
sets the analog output to 0 mA)

IS 50-LO plus / IGA 50-LO plus Manual Introduction •11
Storage Temperature:
-20 … 70 °C
Protection Class:
IP54
Weight:
Converter: approx. 600 g
Optical head II: approx. 140 g
Fiber (2.5 m): approx. 250 g
Dimensions:
125 mm x 80 mm x 57 mm (L x B x H)
Dimensions (Optics):
See Section 2.4
Mounting Position:
Any
CE label:
According to EU directives about electromagnetic immunity
*Additional measurement uncertainty due to offset drift of the signal converter at long
temperature ranges. Tc = measuring temperature up to which an additional measurement
uncertainty occurs when the ambient temperature differs from the reference temperature of
23 °C
Type
MB/°C
Tc/°C
IS 50-LO plus, MB 25
750…2500
760
IGA 50-LO plus, MB 13
300…1300
335
IGA 50-LO plus, MB 13.5L
250…1350
343
IGA 50-LO plus, MB 18
350…1800
400
IGA 50-LO plus, MB 25
450…2500
462
IGA 50-LO plus, MB 20
300…2000
420
IGA 50-LO plus, MB 25
350…2500
362
Note: The calibration / adjustment of the instruments was carried out in accordance
with VDI/VDE directive “Temperature measurement in industry, Radiation
thermometry, Calibration of radiation thermometers”, VDI/VDE 3511, Part 4.4.
For additional details on this directive, see http://info.lumasenseinc.com/calibration or
order the directive from “Beuth Verlag GmbH” in D-10772 Berlin, Germany.
2.4 Dimensions
Converter:
Optical head I: Optical head II:
(fixed adjusted)
Optical head II:
(focusable)
All dimensions in mm

IS 50-LO plus / IGA 50-LO plus Manual Introduction •12
2.5 Physical user interface
2.6 Accessories (Optional)
Numerous accessories guarantee easy installation of the pyrometers. The following overview
shows a selection of suitable accessories. You can find the entire accessory list with all reference
numbers in Section 10.2 Reference numbers accessories).
2.6.1 Mounting
For mounting and aligning the optical head to the
measured object mounting angles or a ball and socket
mounting is available. The ball and socket mounting
is an easy way to align the pyrometer to the
measured object. The clamping-screws of the ball and
socket mounting enable an easy and fast adjustment
of the pyrometer in all directions.
Mounting angles
Ball and socket mounting
2.6.2 Air purge
The air purge protects the lens from contamination
with dust and moisture. It must be supplied with dry
and oil-free pressurized air (1.5 m³ / h) and generates
an air stream shaped like a cone.
Air purge
2.6.3 Displays
In addition to the built-in temperature indicator of
the pyrometer, LumaSense offers several digital
displays which can also be used for remote
parametrizing of the pyrometer.
Digital display DA 6000
Optical head (with
black fibre mark)
Power supply,
analog output,
digital interface
Optical fibre
LC display for
measuring
temperature or
parameters
Targeting light button
Type label
Color mark
Converter

IS 50-LO plus / IGA 50-LO plus Manual Controls and Installation •13
3Controls and Installation
3.1 Electrical Installation
The series 50 pyrometers are powered by a voltage of 24 V DC (possible range 12 ... 30 V) or AC
(48 ... 62 Hz). Once connected to power, the instrument operates immediately and needs no
warm-up time. To switch off the instrument, unplug the connector.
To meet the electromagnetic requirements, a shielded connecting cable must be used. The
shield of the connecting cable has to be connected only on the pyrometer side to avoid ground
loops.
LumaSense offers connecting cables, but they are not part of standard scope of delivery. The
main connecting cable has wires for power supply, interface, analog output, external laser
switch and external clear of maximum value storage via contact and 12 pin angle connector (see
Chapter 10,Reference numbers). The cable includes a short RS232 adapter cable with a 9 pin
SUB-D connector for direct PC communication. This adapter is not used in combination with
RS485 interface.
3.1.1 Pin assignment for the connector on the back of the pyrometer
Pin Color Indication
Pin assignment
(side of male inserts)
K
white
+ 24 V power supply (or 24 V AC)
A
brown
0 V power supply
L
green
+ I
outp.
analog output
B yellow
– Ioutp. analog output
H
gray
external switch for targeting light (bridge to K)
J pink
see below: output for switch contact, external clearing
of maximum value storage or input for hold function
G
red
DGND (Ground for interface)
F
black
RxD (RS232) or B1 (RS485)
C violet TxD (RS232) or A1 (RS485)
D
gray/pink
B2 (RS485) (bridge to F)
E
red/blue
A2 (RS485) (bridge to C)
M orange
Screen only for cable extension, don’t connect at the
switchboard

IS 50-LO plus / IGA 50-LO plus Manual Controls and Installation •14
Connector pin J
The connector pin J can be used for 3 different functions:
1) Switch contact:The pyrometer is equipped with a switch contact for use as a thermo
switch. This function enables the detection of a hot object in the measuring beam of the
pyrometer. The contact is activated only in combination with a clear time setting “auto“ or a
minimum time setting of 1 s (see 5.3 Clear time for the maximum value storage). If the
temperature exceeds 2 °C min. or 1% of the span of the temperature range above the
minimum range, the power supply (pin K) is connected to pin “J“.
2) External clearing of the maximum value storage:If the clear time is set to “extern”
(settings also see 5.3), pin J can be used as input for external clearing of the maximum value
storage. To clear the maximum value storage, connect pin J for a short time to pin K (power
supply voltage).
3) Hold function: when the hold function mode is activated the current temperature, reading
is frozen as long as J and pin K are connected (see 5.3 Clear time for the maximum value
storage).
3.1.2 Connecting the pyrometer to a PC
The pyrometers are equipped with a serial interface RS232 or RS485 (switchable at the
pyrometer). Only one pyrometer can be connected on the standard PC RS232 interface. Only
short distances can be transmitted with RS232 and electromagnetic interferences can affect the
transmission.
The pyrometer is equipped with an RS485 serial interface. With the RS485, long transmission
distances can be realized, and the transmission is, to a large extent, free of problems. The RS485
also allows several pyrometers to be connected in a bus system.
If an RS485 connection is not available at the PC, it can be accomplished using an RS485 or RS232
to USB connector. When using a RS485 to USB adapter, make sure that the adapter is fast
enough to receive the pyrometer’s answer to an instruction of the master. Most of the
commonly used adapters are too slow for fast measuring equipment, so it is recommended to
use the RS485 USB converter “USB nano“ (ref. no. 3 852 600).
With a slow RS485 connection it is also possible to set a wait time at the pyrometer which delay
the response of a command to the pyrometer (see 5.9 Wait time tw).
Connecting to RS232 interface
The transmission rate (in baud) of the serial
interface is dependent on the length of the
cable. Values between 2400 and 115200 Bd
may be set.
The baud rate must be reduced by 50% when
the transmission distance is doubled (see also
5.7 kBaud (baud rate)).
Typical cable length for RS232 at 19200 Bd is
7 m.
K
A
B
C
D
J
G
F
E
H
M
L
1
2
3
4
5
6
7
8
9
DGND (red)
RxD (black)
TxD (violet)
Pyrometer’s side
(soldering side)
cable
PC’s side
(soldering side)

IS 50-LO plus / IGA 50-LO plus Manual Controls and Installation •15
Connecting to RS485 interface
Half-duplex mode:
A1 and A2 as well as B1 and B2 are
bridged in the 12-pin round
connector of the connecting cable,
to prevent reflections due to long
stubs. It also safeguards against the
interruption of the RS485 Bus
system should a connecting plug be
pulled out. The master labels mark
the connections on the RS485
converter. The transmission rate of
the serial interface in Baud (Bd) is
dependent on the length of the
cable. Values between 2400 and
115200 Bd may be set.
The baud rate is reduced by 50%
when the transmission distance is doubled (see 5.7 Baud Rate (kBaud)). Typical cable length
for 19200 Bd is 2 km.
3.1.3 Connection of additional analyzing devices
Additional analyzing instruments (such as LED digital display instruments) only need to be
connected to a power supply and the analog outputs from the pyrometer. Another Instrument,
such as a controller or printer, can be connected to the display in series as shown below (total
load of resistance max. 500 Ohm).
yellow
LED digital display
Controller
Power supply
green
brown
white
230 V ~
24 V DC
°C
Writer
Converter
3.2 Mechanical Installation
3.2.1 Overview
Terminator 120 Ohm
A
B
S
K
A
B
C
D
J
G
F
E
H
M
L
K
A
B
C
D
J
G
F
E
H
M
L
K
A
B
C
D
J
G
F
E
H
M
L
DGND
B1
A2
B2
A1
DGND
B1
A2
B2
A1
DGND
A2
B2
A1
B1
Master
Pyrometer 32
e.g. address 31
Pyrometer 2
e.g. address 01
Pyrometer 1
e.g. address 00

IS 50-LO plus / IGA 50-LO plus Manual Controls and Installation •16
3.2.2 Converter
To fix the converter, 2 drill holes for
screws with 4 mm diameter
accessible after removing the cover.
For fixing and aligning the optical
head, different mounting supports
are available (see 2.6 Accessories
(Optional)).
3.2.3 Fiber
The transmission between optical head
and converter is done via 0.2 mm (red
fiber mark) mono fiber with a stainless-
steel protection hose (exceptions:
IS 50-Si-LO plus, MB 13: 0.4 mm mono
fiber (blue mark) and IS 50-Al-LO plus:
0.6 mm mono fiber (green mark)). The
optical head contains only the lens, the
sensor and the electronics are located
in the converter. Fiber and optical head
can be used in ambient temperatures
up to 250 °C without additional cooling (fiber at converter side max. 125 °C).
The fiber has a color mark for correct connection to the pyrometer. This color mark must be
mounted on the pyrometer’s side. On side of the optical head no mark or a black mark is
viewable.
Attention: The light guide end of the fiber optic cable as well as the socket/connector
and the optical head must always be protected with the caps when not connected!
Minimum Bending Radius
Red
Blue
Green
For short time (max. 250 °C):
50 mm
100 mm
150 mm
Permanent (max. 250 °C) :
120 mm
300 mm
500 mm
Wound up (max. 50 °C):
120 mm
300 mm
500 mm
Note: A hot fiber optic cable should not be exposed to continual movement!
Cover
Drill holes
Fiber
Color mark
Screw connection
Pin
Cut-out

IS 50-LO plus / IGA 50-LO plus Manual Controls and Installation •17
Serial Number
The original fiber has a serial number which is also
on the pyrometer’s housing.
Attention: Faultless operation of the pyrometers is ensured only when using
components with the same serial number.
The system must be re-calibrated if the fiber optic cable or the optical head are
exchanged (service)!
Ambient Temperature
Fiber and optical head can withstand ambient temperatures up to 250 °C without cooling on the
optical head’s side.
3.3 Sighting
3.3.1 Laser targeting light
For exact measurement of the object temperature, the pyrometer must be aligned correctly
onto the object. For this alignment, the pyrometers are equipped with a laser targeting light.
This laser enables the simple and accurate alignment even onto small objects.
The laser marks the center of the measuring spot. The laser targeting light can be used during
operation without affecting the measurement.
The laser targeting light can be switched on and off either by pressing the button at the
housing or by using an external contact (see 3.1.1 Pin assignment for the connector on the
back side of the pyrometer) or via PC and the software InfraWin. After two minutes, the laser
targeting light switches off automatically.
If the converter cover is opened the laser targeting light can be switched with the button with
the ∗symbol. When the laser targeting light is switched on, the display shows “PILT”.
Caution: Do not look directly into the laser beam! Laser class 2 according to
IEC 60825-1-3-4
Note: To prevent damage to the laser, the laser targeting light switches off
automatically if the internal temperature of the device goes above approx. 55 °C (then
it cannot be switched on again until the temperature is lower again)!
Note: The laser warning signs on the pyrometer should be easily viewable at all times,
even after it has been installed.

IS 50-LO plus / IGA 50-LO plus Manual Controls and Installation •18
3.4 Optics
Depending on the application the instrument will be delivered with a small or a large optical
head. The selection of the optical head depends not only on its size but also on the required
spot size (size of the measuring object) and the measuring distance.
Optical head
Measuring
distance
a[mm]
Spot size M
90
[mm]
Aperture
D[mm]
IS 50-LO plus
IS 50/055-LO plus
IS 50/067-LO plus
IS 50-Si-LO plus,
MB 16
IGA 50-LO plus
IS 50-Si-LO plus
MB 13 IS 50-AI-LO plus
Type I
(small
optics)
120
1.2
2.2
3.3
7
260
2.6
7.5
7.5
7
700
7.2
14
21
7
Type II
(fixed
adjusted)
87
0.45
0.75
1.1
17
200
0.8
1.5
2.3
17
600
2.7
5.3
8.0
15
4500
22
4.2
63
15
Type II
(focusable)
88 … 110
0.45 … 0.6
0.8 … 1.1
1.2 … 1.7
17
95 … 129
0.5 … 0.75
0.9 … 1.3
1.4 … 2.0
16
105 … 161
0.6 … 1.0
1.1 … 1.7
1.7 … 2.6
15
200 … 346
0.8 … 1.5
1.5 … 2.8
2.3 … 4.2
17
247 … 606
1.1 … 2.7
2.0 … 5.2
3.0 … 7.8
16
340 … 4500
1.5 … 22
2.8 … 42
4.2 … 63
15
•Measuring distance from the front of the lens
•Spot size Mfor focusing to the measuring distance afor 90% of the radiation
•The aperture is the effective lens diameter of the optics
3.4.1 Calculating spot sizes
Spot sizes for other measuring distances can
be calculated with the following equations
or with the IR calculator of the InfraWin
software.
Table values: a1= measuring distance
M1= spot size
D = aperture
Note: The measuring object must be bigger than or at least as big as the spot size
of the pyrometer.

IS 50-LO plus / IGA 50-LO plus Manual Controls and Installation •19
3.4.2 Adjusting the required measuring distance
A tape can be used to determine the distance between object and pyrometer. The measuring
distance is always measured from the front of the lens.
If the laser is switched on, its smallest spot is in the measuring distance of the corresponding
optics or adjusted distance and it marks the center and size of the spot.
Caution: Do not look directly into the laser beam! Laser class 2 according to
IEC 60825-1-3-4.

IS 50-LO plus / IGA 50-LO plus Manual Controls and Installation •20
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