Williamson U2-1 User manual

Installation & Operation Manual
for SilverU2 Series
Infrared Thermometer

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Silver U2 Series non-contact infrared sensors measure temperatures from 45°C to
2000°C and provide a linear 0 to 20 or 4 to 20 mA output. The signal is compatible
with almost any indicator, controller, recorder, data logger etc., without the need for
special interfacing or signal conditioning. They are especially suited to low-emissivity
targets such as steel rollers and other metal surfaces, even at low temperatures.
Specification
GENERAL
Temperature Range U2-1: 45°C*to 300°C (U2-1-15-0 only)
U2-2: 100 to 400ºC (U2-2-15-0 only)
U2-3: 250°C to 1000°C
U2-4: 450°C to 2000°C
Output 4 to 20 mA, 0 to 20 mA
(linear with temperature, adjustable via software)
Accuracy* ±1% of reading or ±2°C whichever is greater
Repeatability* ±0.5% of reading or ±0.5°C whichever is greater
Emissivity 0.1 to 1.0, adjustable via software
Response Time ≥240ms(90%response)
Field-of-View 15:1 (U2-1 or U2-2)
25:1 (U2-3-25 or U2-4-25)
75:1 (U2-3-75 or U2-4-75)
ø7.5mm @ 500mm (U2-3-CF or U2-4-CF)
Spectral Response 2.0 to 2.6 µm
Supply Voltage 24 V DC (26 V DC max.)
Sensor Voltage 11 V DC min.
Maximum Loop Impedance 900ohms@24VDC
MECHANICAL
Construction Stainless Steel
Dimensions 25 mm diameter x 106.5 mm
Output Cable Length 1 m (longer cable available to order)
USB Cable Length 1 m
Weight with Output Cable 175 g
ENVIRONMENTAL
Environmental Rating IP65
Ambient Temperature Range 0°C to 70°C
Relative Humidity 95%maximumnon-condensing
Electromagnetic Compatibility EN61326-1:2006 Industrial (analogue output only)
EN61326-1:2006 Basic (USB)
* Object temperature > Tmin (see graph of Minimum Measurable Temperature on page 8)
3.8 (98.0)
4.2 (106.5)
0.6
(15.0)
1.0 (25.0)
M20 x 1mm
36.0 (1000.0)
(standard length)

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acceSSorieS
A range of accessories to suit different applications and industrial environments is
available. These may be ordered at any time and added on-site. The accessories
consist of the following parts .
Fixed mounting bracket
Adjustable mounting bracket
Air purge collar
Laser sighting tool
optionS
The following options are available. Options are factory installed and must be ordered
with the Silver U2 sensor.
Air/water cooled housing
Certificate of calibration
Longer cable (30 m max.)
opticaL cHart
The optical chart below indicates the nominal target spot diameter at any given
distancefromthesensingheadandassumes90%energy.
Distance: Sensor to object (inches)
Distance: Sensor to object (mm)
15 60 135
0.6 2.4 5.3
0 59.1 118.1
0 1500 3000
Spot Dia.
(inches)
Spot Dia.
(mm)
Spot Dia.
(inches)
Spot Dia.
(mm)
Distance: Sensor to object (inches)
Distance: Sensor to object (mm)
15 100 215
0.6 3.9 8.5
0 59.1 118.1
59.1 118.1
0 1500 3000
0 1500 3000
D:S 25:1D:S 15:1
Silver U2-25
Distance: Sensor to object (inches)
Distance: Sensor to object (mm)
15 20 55
0.6 0.8 2.2
0
Spot Dia.
(inches)
Spot Dia.
(mm)
D:S 75:1
Silver U2-75
Silver U2-15
Spot Dia.
(inches)
Spot Dia.
(mm)
Distance: Sensor to object (inches)
Distance: Sensor to object (mm)
15
7.5 30
0.6 0.3 1.2
0 19.7 39.4
0 500 1000
Silver U2-CF

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inStaLLation
The installation process consists of the following stages:
Preparation
Mechanical installation
Electrical installation
Please read the following sections thoroughly before proceeding with the installation.
preparation
Ensure that the sensor is positioned so that it is focused on the target only.
Sensor
BEST
GOOD
INCORREC
T
Background
Target greater
than spot size
Target equal to
spot size
Target smaller
than spot size
DISTANCE AND SPOT SIZE
The size of the area (spot size) to be measured determines the distance between the
sensor and the target. The spot size must not be larger than the target. The sensor
should be mounted so that the measured spot size is smaller than the target.
REFLECTIONS
The sensor must be installed in a location where energy from lamps, heaters and
sunlight cannot be reflected from the target into the lens. The use of shields may help
in this respect. For further information and assistance contact Williamson.
AMBIENT TEMPERATURE
The sensor is designed to operate in ambient temperatures from 0°C to 70°C. For
ambient temperatures above 70°C, an air/water-cooled housing will be required.
Avoid thermal shock. Allow 20 minutes for the unit to adjust to large changes in
ambient temperature.
ATMOSPHERIC QUALITY
Smoke, fumes or dust can contaminate the lens and cause errors in temperature
measurement. In these types of environment the air purge collar should be used to
help keep the lens clean.

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ELECTRICAL INTERFERENCE
To minimise electromagnetic interference or ‘noise’, the sensor should be mounted
away from motors, generators and such like.
WIRING
Check the distance between the sensor and the indicating/controlling device. If
necessary, the Silver U2 sensor can be ordered with a longer output cable attached.
mecHanicaL inStaLLation
All sensors come with a 1 m cable and a mounting nut. The sensor can be mounted
on brackets or cut outs of your own design, or you can use the fixed and adjustable
mounting bracket accessories which are shown below.
12.0
45.0
50.0 50.0
40.0
9.0
15.0
25.0 25.0
Ø20.0
60° Rotation 60° Rotation
60° Rotation
9.0
48.0
Fixed Bracket (FB3) Adjustable Bracket (AB3)
2 x Mounting Holes M4 Clearance 2 x Mounting Holes M4 Clearance
9.0
24.024.0
26.0
34.0
47.0 58.5 81.0
1/8 BSP Water/Air Connections
Air Purge Collar Water/Air Cooling Jacket
AIR/WATER COOLED HOUSING
The air/water cooled housing shown below allows the sensor to withstand high ambient
temperatures. It is equipped with two 1/8” BSP fittings. Water temperature should be 10°C
to 27°C for efficient cooling. Chilled water below 10°C is not recommended. To avoid
condensation, the air purge collar, supplied with the cooled housing, should be used.

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eLectricaL inStaLLation
The sensor to electronics cable is a 1 m PTFE cable. One end is attached, at the factory,
to the sensor head. The other end has two pairs of wires and a shield (ground) wire.
WIRING
The Silver U2 sensor can be used in three different ways as shown below. To use the
analogue output, connect the Silver U2 sensor to the controller/indicator with the 24 V
DC power supply using the following table and connection diagram as a guide. The
maximum loop impedance is 900 ohms. Note: The Silver U2 sensor must be
grounded at only one point, either the cable shield or the sensor housing.
Wire No. Wire Colour Function Tag
1 Red Power supply + PWR +
2 Blue Power supply - PWR –
3 Yellow Signal + OP +
4 Green Signal – OP –
5 Bare Shield ground
Alternatively, to use the USB output, connect the Silver U2 sensor to a PC using the
cable provided. No external power supply is required when using the USB output. The
Silver U2 sensor can also be used with both the analogue output and USB connected,
provided that the negative terminal of the 24 V DC power supply being used is not
grounded. Note: The SilverView software must be installed before connecting the
sensor to a PC.
1/8 BSP Air connection
27
58.5
26
34
47
AIR PURGE COLLAR
The air purge collar below is used to keep dust, fumes, moisture, and other
contaminants away from the lens. It must be screwed in fully. Air flows into the 1/8”
BSP fitting and out of the front aperture. Air flow should be no more than 5 to 15 litres/
min.
Clean or ‘instrument’ air is recommended.

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SiLverview Software
SYSTEM REQUIREMENTS
• SilverView software is designed to run under Windows. Suitable versions are
Windows 2000, Windows XP, Windows Vista and Windows 7.
• The recommended minimum computer specification is:
Intel Pentium processor
VGA display with 640x480 resolution
USB 2.0 port
INSTALLATION
1. Insert the disk provided
2. Installer should run automatically (if not, select the appropriate drive and double click
on Setup.exe)
3. Follow the on-screen instructions
NOTE Do not connect the Silver U2 Sensor to the PC before the software is
installed
CONNECTING THE SILVER U2 SENSOR TO A PC
1. Connect the circular connector on the USB cable provided to the Silver U2
sensor
2. Connect the USB A connector on the USB cable provided to an available USB
2.0 port
3. Double click on the SilverView desktop icon
configuration
• Setting Temperature Units
Temperature units can be set on the main temperature panel by pressing °C or °F.
+-
-
+
Display/
Controller
Red
Yellow
Green
Blue
Power Supply
-
+
Display/
Controller
PC
PC
N/C
USB
USB
+-
Red
Yellow
Green
Blue
Power Supply

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• Setting Output Processing
The temperature range for the analogue output, the averaging period and the peak/
valley hold processing can be set by using the main program menu to select:
[Setup] → [Output Processing]
The temperatures corresponding to the lower and upper limits of the analogue output
can then be set as follows:
Model Lower Limit Upper Limit Minimum Span Maximum Span
U2-1 45°C 300°C 100°C 255°C
U2-2 100C 400°C 100°C 300°C
U2-3 250°C 1000°C 100°C 750°C
U2-4 450°C 2000°C 100°C 1550°C
The output type can be selected as either 0 mA to 20 mA or 4 mA to 20 mA.
To minimise the the effects of temperature fluctuations, noise etc on the output
signal, the averaging period can be set between 0 and 60 seconds.
If required, Hold Processing can be applied by setting hold mode to Peak Hold or
Valley Hold and setting a hold period between 0 and 1200 seconds.
• Setting Target Emissivity
To set an emissivity value for the Silver U2 sensor, use the main program menu to
select:
[Setup] →[Emissivity]
Emissivity can then be set to a value between 0.1 and 1.0, or selected from a pre-
set list of materials by selecting [Data].
MINIMUM MEASURABLE TEMPERATURE (U2-1-15-0 only)
• Setting Reflected Temperature Compensation
To enable and set reflected temperature compensation, use the main program menu
to select:
[Setup] → [Reflection Compensation]
Reflected temperature compensation can be enabled/disabled using [Compensate
for Reflected Temperature], and when enabled the temperature value can be set
between 45 and 2000°C, depending on the model selected.
To store the changes in the sensor’s memory, select [File] → [Save sensor processing
parameters].
Graph showing the minimum
measuarable object
temperature (Tmin), determined
by surface emissivity (ε) and
sensor temperature (TS).

operation
Once the sensor is in position and the appropriate power, air, water, and cable con-
nections are secure, the system is ready for continuous operation by completing the
following simple steps:
1. Turn on the power supply
2. Turn on the instrument or PC
3. Read / monitor the temperature
IMPORTANT
Be aware of the following when using the sensor:
• If the sensor is exposed to significant changes in ambient temperature (hot to cold,
or cold to hot), allow 20 minutes for the temperature to stabilise before taking or
recording measurements.
• Do not operate the sensor near large electromagnetic fields (e.g. around arc welders
or induction heaters) or where energy from lamps, heaters and sunlight could be
reflected into the lens.
Electromagnetic interference can cause measurement errors.
• Wire must be connected only to the appropriate terminals.
maintenance
Our customer service representatives are available for application assistance, calibra-
tion, repair, and solutions to specific problems. Contact our Service Department before
returning any equipment. In many cases, problems can be solved over the telephone.
If the sensor is not performing as it should, try to match the symptom below to the
problem. If the table does not help, call Williamson for further advice.
TROUBLESHOOTING
Symptom Probable Cause Solution
No output No power to sensor Check power supply
Erroneous temperature Incorrect wire connection Check wire colour codes
Erroneous temperature Faulty sensor cable Verify cable continuity
Erroneous temperature Field of view obstruction Remove obstruction
LENS CLEANING
Keep the lens clean at all times. Any foreign matter on the lens would affect measure-
ment accuracy. Blow off loose particles (if not using the air purge accessory) with an
air ‘puffer’.
GUARANTEE
Williamson warrants each instrument it manufactures to be free from defect in mate-
rial and workmanship under normal use and service for the period of two years from
the date of purchase.

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Issue D - Nov 11
Williamson Corporation
70 Domino Drive, Concord, MA 01742, United States of America
978-369-9607 (phone) 978-369-5485 (fax) 800-300-8367 (USA & Canada Toll Free)
www.williamsonir.com