User's Guide
Meter Description
1.
2.
3.
Probe Holder
Probe
Probe swivel arm
IR display
Pocket clip
Probe display
IR button
MODE button
Thermocouple probe button
o
C / F Temperature units selection
To change the temperature units press the IR button once,
the MODE button four (4) times, & the IR button once again.
o
Minimum / Maximum IR Readings (IR measurements only)
1. The MIN and MAX modes allow the user to take
measurements while only viewing the highest (MAX) or
lowest (MIN) reading.
2. Press the IR button to turn on the IR measurement mode
3. Press the MODE button once to select the flashing “MIN”
icon or press the MODE button twice to select the flashing
“MAX” icon.
4. Press and hold the IR button to take a continuous IR
measurement. As long as the IR button is held down, only
the lowest (MIN) or the highest (MAX) reading will display.
Subsequent measurements will only update the display if a
lower or higher reading is encountered.
5. To exit this mode, press and hold the MODE button.
IR Lock Mode
1. In the LOCK mode, the user can take a continuous IR
measurement (for up to 60 minutes) without having to press
and hold the IR button.
2. Press the IR button, press the MODE button three (3) times
and then press the IR button again. The “LOCK” display
icon will appear on the LCD.
3. The meter will now measure temperature continuously for
up to 60 minutes or until the IR button is pressed.
IR Emissivity Adjustment
The IR301 has a factory default emissivity setting of 0.95. This
is the best setting for most applications. However, for some
surfaces, this setting may require adjustment. Emissivity tables
are available which include most common materials. To
determine the proper emissivity setting for any surface, take a
probe measurement and an IR measurement of the surface. If
the readings match, the emissivity setting is correct. If the
readings are different, the emissivity should be adjusted until
the IR reading agrees with the probe measurement.
To adjust the emissivity, press the IR button once and then
press the MODE button five (5) times. Now use the IR button to
scroll through the emissivity selection range.
The emissivity range is 0.1 to 1.00 (the IR301 display actually
shows 10 to 100 representing 0.1 to 1.00).
To exit this mode, press and hold the MODE button.
Combination IR + Stem
Thermometer
Model IR301
4.
5.
6.
7.
8.
9.
10. Infrared sensor
Introduction
Congratulations on your purchase of the Extech IR301. The
IR301 is a combination non-contact infrared thermometer
and
probe thermometer. Careful use of this instrument will provide
years of reliable service.
Note
that the battery compartment is located on the rear of
the instrument.
Operation
Non-contact InfraRed (IR) Temperature Measurements
1. Aim the meter’s IR lens (top of meter) toward the
surface under test; hold the meter as close as
safely possible to the surface under test.
2. Press and hold the IR button to continuously
measure temperature. The IR measurement
reading appears on the upper display.
3. When the IR button is released, the HOLD
display icon switches on, indicating that the last
reading is now being held (frozen).
4. The meter will automatically turn OFF after
approximately 10 seconds.
Contact Temperature Probe Measurements
1. Carefully release the probe from its latch and
rotate it to the desired position. Do NOT attempt
o
to rotate the probe arm more than 180 .
2. Press the PROBE button momentarily to begin
taking readings. The lower display will indicate
the measured temperature.
3. Press the PROBE button again to hold the
reading. The HOLD icon will switch on indicating
that the reading is held (frozen). Press the
PROBE button again to exit the HOLD mode.
4. The meter will automatically turn OFF after
approximately 4 minutes.
5. Keep the probe in the latched position when not
in use.
Specifications
Display
Thermocouple probe
Measurement ranges
2000 count Dual LCD display.
4.5” (114mm) stainless steel stem type K
Non-contact Infrared (IR) mode:
o
o
-27 to 428 F (-33 to 220 C)
Contact temperature probe mode:
o
o
-67 to 626 F (-55 to 330 C)
o
o
o
Resolution
0.1 to 199.9 ; 1 >200
o
o
Accuracy
IR: ±3% of reading or 6 F (3 C)*
o
o
Probe: ±1% of reading or 2 F (1.2 C)*
* whichever is greater
IR Distance/Spot ratio 1:1 (the meter’s distance from object
equals the size of the measurement spot)
Out of range indicators ‘ ’ or ‘ ’ appears on the LCD
Readings may be affected if the unit is
operated within radio frequency
electromagnetic field strengths of 3V per
meter (approx.). Note that the meter will
not be permanently affected.
CR2032 button battery
30 hours of continuous use (minimum)
1.0 x 1.6 x 6.1" (24.2 x 39.8 x 156mm)
Approx. 2.6 oz. (70g) with battery
Low battery indication
EMC/FRI
Power supply
Battery life
Dimensions
Weight
EXTECH [ EXTECH INSTRUMENTS CORPORATION. ]
