Oakton 35629-20 User manual

Noncontact Thermometer
57512-1 Rev. A 4/00
InfraPro®3 Standard Model 35629-20
InfraPro®4 Enhanced Model 35629-30

Specifications
Temperature range D : S*
35629-20 -32 to 600°C (-25 to 1100°F) 30 : 1
35629-30 -32 to 760°C (-25 to 1400°F) 50 : 1
Contact Probe -40 to 260°C (-40 to 500°F)
Display Resolution 0.1°C (0.1°F)
Infrared Accuracy For targets:
(assumes Above 23°C (73°F): ± 1% of reading or ± 1°C (± 2°F),
ambient operating whichever is greater
temp. of 23-25°C[73-77°F]) -18 to 23°C (0 to 73°F): ± 2°C (± 3°F)
@ calibration geometry** -26 to -18°C (-15 to 0°F): ± 2.5°C (± 4°F)
-32 to -26°C (-25 to -15°F): ± 3°C (± 5°F)
Probe Accuracy ± 1°C (± 2°F) or 1% of reading, whichever is greater
Repeatability ± 1°C (± 2°F), or ± 0.5% of reading, whichever is greater
Response time 500 mSec
Spectral response 8–14 µm
Emissivity Digitally adjustable from 0.10 to 1.0
Ambient operating range 0 to 50°C (32 to 120°F)
Laser Max Laser turns off above 40°C (104°F) ambient temperature
Relative humidity 10–95% RH noncondensing, at < 30°C (86°F) ambient
Storage temperature -20 to 60°C (-13 to 158°F) without battery
Weight / Dimensions 320g (11oz); 200 x 160 x 55 mm (8 X 6 X 2 in)
Power 9V Alkaline or NiCd battery
Typical Battery life 20 hours with laser and backlight on 50%
(Alkaline) 40 hours laser and backlight off
Tripod Mount 1/4” 20 UNC threading
*90% encircled energy at the focal point. (Focal point = 914mm (36 inches)).
**Unit is calibrated at 279.4mm (11 in) away from 139.7mm (5.5 in) diameter, 0.95 emissivity blackbody.

3
• Display
• Anzeige
• Affichage
• Pantalla
• Display
••
• Laser
• Laser
• Laser
• Láser
• Laser
••
• Trigger
• Meßtaste
• Gâchette
• Gatillo
• Gatilho
••
• Battery Compartment
• Batteriefach
• Logement des Piles
• Compartimento
de las Pilas
• Compartimento
de Bateria
••
• Battery Cover
• Batterieabdeckung
• Couvercle du
Lcompartiment Pile
• Tapa de las Pilas
• Tampa da Bateria
••
• °C/°F Switch
• °C/°F-Schalter
• Commutateur °C/°F
• Interruptor de °C/°F
• Chave °C/°F
••
• Lock ON/Off Switch
• Lock An/Aus Schalter
• Verrouillage du
Commutatuer
• Interruptor para trabar
o destrabar la unidad
• Travo do Gatilho
ON/OFF
•
•

English
4
Warning
Do not point laser directly at eye or indirectly off
reflective surfaces.
Cautions
All models should be protected from the following:
▲EMF (electro-magnetic fields) from arc welders,
induction heaters, etc
▲Static electricity
▲Thermal shock (caused by large or abrupt ambi-
ent temperature changes—allow 30 minutes for
unit to stabilize before use)
▲Do not leave the unit on or near objects of high
temperature

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Features
Your thermometer includes:
• Circular laser sighting
• Adjustable emissivity
• High and low alarm
• MAX, MIN, DIF, AVG temperature displays
• Data logging
• Trigger lock
• Backlit display
• Contact probe jack
• Hard case and wrist strap
Accessories
The optional accessories for your
thermometer are:
• Contact probe (RTD)
• Nylon Holster
• NIST/DKD certification
Circular Laser Sighting
The circular laser is made up of eight laser
spots that form a circle to show the
approximate area being measured; a
single laser spot shows the center of the
measurement area. In low-light conditions,
lighter spots surrounding the laser circle
may appear. These spots are not used for
aiming purposes. Use only the laser circle
to aim the unit.

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6
In SCAN mode, the LCD displays both the current temperature (G) and selected
Mode function (D, E) in Celsius or Fahrenheit (B). The unit will HOLD the last read-
ing for 7 seconds after the trigger is released; the word HOLD appears (H). When
the battery is low, the battery icon is displayed, but the unit will continue to function;
when the battery is dead, the display will blank, and the unit will no longer function.
To activate the laser and backlight, pull the trigger. Press the laser/backlight button
(4) once to activate the backlight, twice to turn both laser and backlight on, and a
third time to turn them off.
Display
A) Backlight “On” symbol
B) °F/°C symbol
C) High Alarm and Low Alarm symbol
D) Temperature values for the MAX, MIN,
DIF, AVG, HAL (high alarm), LAL
(low alarm), and logged temperatures
E) Symbols for MAX, MIN, DIF, AVG,
HAL, LAL, PRB, and
F) LOG icon shows log Mode for data
storage
G) Current temperature value
H) SCAN or HOLD
I) Emissivity symbol and value
J) Low Battery, lock “On”, and laser
“On” symbols
1) SET button (for setting the high
alarm and low alarm)
2) Up and Down buttons
3) MODE button (for cycling through the
Mode loop)
4) Laser/Backlight on/off button (pull trig-
ger and press button to activate
laser/backlight)
5) LOG button (for storing data)
A
B
C
D
E
F
G
HIJ
45
2
1
3
Buttons
User Interface

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How it Works
Infrared thermometers measure the sur-
face temperature of an opaque object.
The unit’s optics sense emitted, reflect-
ed, and transmitted energy, which are
collected and focused onto a detector.
The unit’s electronics translate the
information into a temperature reading
which is displayed on the unit. The
laser is used for aiming purposes only.
Introduction
We are confident you will find many
uses for your handheld noncontact
thermometer. Compact, rugged, and
easy to use—just aim, pull the trigger,
and read the temperature in less than a
second. You can safely measure surface
temperatures of hot, hazardous, mov-
ing, or hard-to-reach objects without
contact.

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8
How to Operate the Unit
Switching °C and °F; Locking the
Unit on; Changing the Battery
Measurement: Quick Start
To measure a temperature, point the unit at
an object, and pull the trigger. Be sure to
consider distance-to-spot size ratio and
field of view. The laser is used for aiming
only. For more detailed operating instruc-
tions, see “How to Accurately Measure
Temperatures.”
To open the unit’s handle, push the button
on the underside of the unit near the trigger,
and pull down and forward at the top of the
unit’s handle. To toggle between °C and °F,
slide the top switch (A) to the appropriate
position.
To lock the unit on for continuous mea-
surement, slide the bottom switch (B)
down. If the trigger is pulled while the unit
is locked on, the laser and backlight will
turn on if they have been activated (see
“User Interface” for instructions on activat-
ing the laser and backlight). When the unit
is locked on, the laser will turn off when the
trigger is released; however, the backlight
will remain on unless it is turned off using
the Laser/Backlight button on the keypad.
To change the 9V battery, insert it with
the positive side toward the rear of the bat-
tery compartment.
A
B
Handle release button

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9
English
How to Accurately Measure
Temperature
Locating a Hot or Cold Spot
To find a hot or cold spot, aim the thermome-
ter outside the area of interest. Then slowly
scan across the area with an up and down
motion until you locate the hot or cold spot.
Field of View
Make sure that the target is larger than the
unit’s spot size. The smaller the target, the
closer you should be to it. When accuracy is
critical, make sure the target is at least twice
as large as the spot size. (See the diagram on
the side of the unit.) Yes No
Emissivity
Emissivity is a term used to describe the
energy-emitting characteristics of materials.
Most organic materials and painted or oxi-
dized surfaces have an emissivity of 0.95.
Inaccurate readings can result from measur-
ing shiny or polished metal surfaces. To
compensate for this, adjust the unit’s emis-
sivity reading (see “Setting the High Alarm,
Low Alarm, and Emissivity”), or cover the
surface to be measured with masking tape or
flat black paint. Allow time for the tape or
paint to reach the same temperature as the
the material underneath it. Measure the tem-
perature of the tape or painted surface.

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Distance & Spot Size
As the distance (D) from the object increases, the spot size
(S) of the area measured by the unit becomes larger. The rela-
tionship between distance and spot size for each unit is listed
below. The focal point for each unit is 914mm (36”). The spot
sizes indicate 90% encircled energy.
Enhanced Model
D:S = 50:1
Standard Model
D:S = 30:1
S
D
S
D

MODE button Functions
Your infrared thermometer measures Maximum
(MAX), Minimum (MIN), Differential (DIF)*, and
Average (AVG)** temperatures each time you take a
reading. This data is stored and can be recalled with
the MODE button (3) until a new measurement is
taken. (See “Hold and Recall” for information on
how to recall stored data.). When the trigger is
pulled again, the unit will begin measuring in the
last mode selected.
Pressing the MODE button also allows you to
access the High Alarm (HAL), Low Alarm (LAL),
Emissivity (EMS), Probe temperature (PRB – only
available when the probe is connected), and Data
logger (LOG). Each time you press MODE, you
advance through the mode cycle. The diagram
shows the sequence of functions in the Mode cycle.
Note : PRB (probe) is only available in the MODE
loop when the contact probe is connected to the
unit.
Selecting a Function
To Select the MAX, MIN, DIF, or AVG mode, pull the
trigger. While holding the trigger, press the MODE
button (3) until the appropriate code appears in the
lower left corner of the display (E). Each time you
press MODE, you advance through the MODE cycle.
The MODE cycle is shown above.
3
E
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11
*DIF shows the difference between the maximum
and minimum temperatures measured
**AVG shows the average temperature reading for
each time the trigger is pulled or the unit is locked
on

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Setting the High Alarm
and Low Alarm
To set values for the High Alarm (HAL) and
Low Alarm (LAL), pull the trigger. While
holding the trigger, press the MODE button
(3) until the appropriate code appears in the
lower left corner of the display (E). Use the
up and down keys (2) to adjust the desired
values. To activate the alarms, press SET
(1).
Using a Probe (PRB)
Connect the probe to the input on the side of
the unit (as shown). PRB automatically
appears in the lower left corner of the display
(E, below). The probe temperature is shown
in the lower right part of the display. The cur-
rent infrared temperature continues to show
in the center of the display (F). While the
probe is connected, you may still cycle
through the mode functions by pressing
MODE (3).
Note: PRB is only available in the MODE
loop when a probe is connected to the unit;
the probe temperature will not activate the
high alarm or low alarm.
32
1
E
E
F
3

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Storing Data
Your thermometer is capable of storing up to
12 data locations. The infrared temperature,
temperature scale (°C or °F), and emissivity
are also stored.
Infrared
To store data from an infrared reading, pull
the trigger. While holding the trigger, press
the MODE button (3) until LOG appears in
the lower left corner of the display (E); a log
location number will be shown below LOG. If
no temperature has been recorded in the
shown LOG location, 3 dashes will appear in
the lower right corner. Aim the unit at the tar-
get area you want to record, and press the
LOG button (5). You will hear a tone to con-
firm that the location temperature has been
recorded. The recorded temperature will
appear in the lower right corner (D). To select
another log location, press the up and down
keys (2).
Hold and Recall
The unit’s display will remain activated (HOLD)
for seven seconds after the trigger is released
(unless the unit is locked on); HOLD will
appear in the upper left corner of the display
(H). During HOLD, or after the unit shuts off,
you can recall stored values by pressing the
MODE button (3) without pulling the trigger.
Each time you press the MODE button, you
advance through the Mode Cycle. When the
trigger is pulled again, the unit will begin mea-
suring in the last Mode selected.
H
3
E
5
23
D
E
5
23
D

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Recalling Data
To recall stored data after the unit shuts off, press
the MODE button (3) until LOG appears in the
lower left corner (E). A LOG location number will
be shown below LOG, and the stored temperature
for that location will be shown in the lower right
corner of the display (D). To move to another LOG
location, press the Up and Down keys (2).
E
5
23
D
D
D
2
Log Clear Function
The "LOG clear" function allows you to quickly
clear all logged data points. This function can
only be used when the unit is in LOG mode. It can
be used when the user has any number of log
locations stored.
CAUTION: You should only use the LOG clear
function if you want to clear all at once the Log
location data that is stored in the unit's memory.
The "LOG clear" function works as follows:
1) While in LOG mode, press the trigger, and then
press the "down" arrow button (2) until you reach
LOG location "0".
NOTE: This can only be done when the trigger is
pulled. LOG location "0" cannot be accessed, by
using the "up" arrow button.
2) When LOG location "0" shows in the lower left-
hand corner of the display, press the LOG button
(D). Three tones will sound, and the LOG location
will automatically change to "1", signifying that all
data locations have been cleared.

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Maintenance
Cleaning the lens: Blow off loose particles using clean compressed air. Gently
brush remaining debris away with a camel's hair brush. Carefully wipe the surface
with a moist cotton swab. The swab may be moistened with water. NOTE: DO NOT
use solvents to clean the glass lens.
Cleaning the housing: Use soap and water on a damp sponge or soft cloth. NOTE: DO
NOT submerge the unit in water.
Reminders
■Not recommended for use in measuring shiny or polished metal surfaces
(stainless steel, aluminum, etc.). See “Emissivity” for measuring these surfaces.
■The unit cannot measure through transparent surfaces such as glass or plastic.
It will measure the surface temperature of these materials instead.
■Steam, dust, smoke, or other particles can prevent accurate measurement by
obstructing the unit’s optics.

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CE Certification
This instrument conforms to the following standards:
• EN50081-1:1992, Electromagnetic Emissions
• EN50082-1:1997, Electromagnetic Susceptibility
Tests were conducted using a frequency range of 80-1000 MHz with the instrument in
three orientations. The average error for the three orientations is ±1.4°C (±2.5°F) at 3
v/m throughout the spectrum. However, between 162 MHz and 792 MHz at 3 V/m, the
instrument may not meet its stated accuracy.
Troubleshooting
Code Problem Action
– – – (on display) Target temperature Select target within specifications
is over or under range
Battery icon
appears Low battery Check and/or replace battery
Blank display Possible dead battery Check and/or replace battery
Laser doesn’t work (1) Low or dead battery (1) Replace battery
(2) Ambient temperature (2) Use in area with lower ambient
above 40°C (104°F) temperature
ERR Possible damage Contact your distributor
by EMF

Some Noncontact Thermometer Uses
Electrical/Industrial • Industrieanwendungen • Électricité-Méchanique
•Uso electromecánico Industrial • Manutenção Elétrica e Industrial
••
Automotive & Diesel • KFZ-Instandesetzung und Wartung
• Vehicules (essence et diesel) • Automotriz y Diesel • Automotivo e Diesel
••
Food Safety • Lebensmittelüberwachung • Hygiène alimentaire
• Seguridad en Alimentos • Segurança de Alimentos Pereciveis
••

Oakton Instruments