Fieldpiece
Non-contact Infrared
Thermometer
w/Laser Sight
Model: SIR2
OPERATOR’S MANUAL
Description
The SIR2 thermometer is a low cost, standalone
non-contact infrared thermometer. Simply aim the
thermometer at the target and press the 'Scan' but-
ton to display the surface temperature. The temper-
ature measured will be the average of all the tem-
peratures in the field of view. The closer you are to
the target, the smaller the area. The further away,
the larger the area measured.
Applications
The infrared temperature measurement is fast
and easy. It works best for fast readings, relative
readings (one to another or the same one at differ-
ent times), or temperature readings of hard to reach
places. The following are some applications:
• “Shoot” an inside wall for quick and fast indoor
ambient temperature reading.
• Heating and air conditioning where fast and/or
easy measurement is most important.
• Motor bearings: high temperature can indicate
bearings that might need replacement.
• Circuit breakers: a circuit breaker that is not
operating properly can get hot. By scanning a
panel, you will be able to find the hot one.
• Poor power line connections: a bad connection
can get hot.
IR Temperature Measurement
When something is hot, it radiates infrared (IR)
energy. The hotter it is, the more infrared energy. If
there's enough of it, you can feel it. The SIR2
infrared accessory head collects infrared energy
from a circular viewing area and measures the total
amount of energy collected. The SIR2 converts the
total energy measured to a temperature. Distance
doesn't matter because the further you go from the
target, the increase in area "seen" by the sensor
exactly balances the loss of energy collected from a
given area.
If you want to get the temperature of something
small, such as a pipe, you must get close enough
so the pipe takes up the whole viewing area circle.
Otherwise the pipe and the background tempera-
tures will be averaged into the reading.
The accuracy of many infrared temperature
measuring systems is adversely affected by ambi-
ent temperature.
You need to be aware that if the target surface is
reflective enough, it may reflect infrared from other
objects. For example, if you take a reading of a
shiny metal surface, the infrared energy of your face
may reflect enough energy off the surface to affect
the reading.
"Emissivity" of the target surface also affects the
temperature reading. For a given temperature, the
higher the emissivity, the higher the reading. The
lower the emissivity, the lower the reading.
Emissivity of a surface indicates how easy it is for
the infrared to get out. Emissivity for a dull, black
surface is high (nearly 100%) so it's easy for the
infrared to get out. Emissivity for a shiny surface
can be much lower. If the emissivity is low, the
measured temperature will be lower than actual.
For relative readings of the same kind of surface,
this isn't a problem. For some applications, it may
be necessary to spray dull, black paint on the target
to insure a more accurate reading.
For best accuracy use contact sensors (thermo-
couples, thermistors, etc.) anytime you take a tem-
perature measurement. Infrared instruments should
only be used when you aren’t able to touch the sur-
face to be measured.
84.6
°F
MAX
CAUTION:
Laser radiation.
Do not stare
into beam.
Output <1mW, 635-650nm.
Complies with 21 CFR Ch 1/J.
SIR2
D=L/6
D
L
84.6
°F
MAX
CAUTION:
Laser
radiation.
Do
not
st
are
into
beam.
Output
<1mW
,
635-650nm.
Complies
with
21
CFR
Ch
1/J.
SIR2
Field of View
The SIR2 takes it’s measurement from a circle of
a size determined by a simple ratio of 6:1. The
diameter of this circle is 1/6 the distance between
the target and the tip of the SIR2. For example, if
you’re standing 12 feet from your target, the size of
the circle you’re taking the average temperature of
will be 2 feet wide.
Laser Sight
By partially pressing the Scan button, the SIR2
will begin to measure the temperature of the target.
When the Scan button is completely depressed, the
laser will operate.
°F or °C
1. Turn the instrument on by pressing the Scan
button.
2. Press the Mode button four times. The
o
F or
o
C
symbol will flash.
3. Press the Scan button to change.
MIN/MAX
The MIN or MAX modes measure the lowest or
highest temperature, respectively, of all the temper-
atures measured while the MIN or MAX mode is
displayed.
1. Turn the instrument on by pressing the Scan
button, then press the Mode button once for
minimum or twice for maximum function. The
MIN or MAX icon will flash.
2. Press the Scan button to confirm the minimum
or maximum mode. The SIR2 will display the
minimum or maximum reading only.
3. To exit the MIN/MAX functions, don’t press
either button and let the instrument turn off.
When the scan button is pressed again, the
SIR2 will return to normal mode.
LOCK
The LOCK mode is particularly useful for the con-
tinuous monitoring of temperatures. Once the
LOCK mode is activated, the SIR2 will stay on for
60 minutes.
1. Turn the instrument on by pressing the Scan
button.
2. Press the Mode button three times for the lock
mode function. The LOCK icon will flash.
3. Press the Scan button to confirm the lock Scan
mode. The SIR2 will continuously display the
temperature for up to 60 minutes or until the
Scan button is pressed again.
EMC/RF Interferance
Readings may be affected if the unit is operated
within a radio frequency electromagnetic field
strength of approximately 3 volts per meter, but the
performance of the instrument will not be perma-
nently affected.
Specifications
Temperature range:
-67
o
F to 482
o
F
Resolution:
0.1
o
Response time:
1 second
Emmisivity:
0.95 fixed
Power:
2 CR2032 batteries (laser/thermometer)
Battery life:
40 hrs typical, 30 hrs minimum
Operating temperature:
32
o
F to 122
o
F
Storage temperature:
-4
o
F to 149
o
F
Accuracy:
±2%rdg or 2
o
C (3.6
o
F) Whichever is
greater, (at 73
o
F ± 10
o
F in <90%RH)
Field of view:
6:1
Display:
Custom LCD
Auto-off:
15 seconds of idle time
Weight:
0.14 lbs
Dimensions:
0.90” x 2.40” x 4.16”
Accessories:
Wrist strap, 2 batteries (included),
and operator’s manual.
WARNING
Never point the device towards the eyes
permanant eye damage may occur
.
Use extreme caution when using the laser.
Keep out of the reach of children.
!
!
