TENMA 72-820 operating Manual
72-820
Infrared
Thermometer
Model 72-820
OPERATING MANUAL
Model 72-820: OPERATING MANUAL
Table of Contents
Title Page
Introduction
Safety Information
Features
Display
Buttons and Connector
How the Thermometer works.
Operating the Thermometer
Locating a Hot or Cold Spot
Distance and Spot Size
Field of View
Emissivity
Trigger Lock
Switching oC/ oF
HOLD
Typical Measurements
Testing Contactors (Starters)
Testing Enclosed Relays
Testing Fuses and Buss Connections
Testing Electrical Connections
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Model 72-820: OPERATING MANUAL
Table of Contents
Title Page
Scanning Walls for Air Leaks or Insulation Deficiencies
Testing Bearings
Testing Belts and Sheaves
Checking Hydronic Radiant Heat Applications
Measuring Grille, Register, or Diffuser Discharge
Temperature
Checking for Blockage in Air-To-Air Evaporators or
Condensers
Maintenance
Changing the Battery
Cleaning the Lens
Cleaning the Housing
Troubleshooting
CE Certification
Specifications
Infrared
Laser
Electrical
Physical
Environmental
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Model 72-820: OPERATING MANUAL
Table Title Page
1. Symbols
2. Buttons and Connector
3. Surface Emissivity
4. Troubleshooting
List of Tables
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Model 72-820: OPERATING MANUAL
List of Figures
Figure Title Page
1 Symbols and Safety Markings
2 Infrared Thermometer
3 Thermometer Display
4 Buttons and Connector
5 Locating Hot or Cold Spot
6 Distance and Spot Size
7 Field of View
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Model 72-820: OPERATING MANUAL
Introduction
The Model 72-820 Infrared Thermometer (hereafter, the
“Thermometer”) can determine the surface temperature
by measuring the amount of infrared energy radiated
by the target’s surface. They have different distance to
spot (D:S) figure and different temperature range, details
see the contents.It features a temperature range of
0oF~1000oF and a distance-to-spot ratio of 12:1.
The non-contact infrared thermometer features low
power consumption design, allowing extended use
without the need to replace batteries. The highly intuitive
design allows fast easy temperature measurement for
increased efficiency in use.
The Thermometer may also be powered from a standard
computer USB port. This can prove very convenient in
situations were repeated battery changes are not
practical. The Thermometer will automatically select
between battery and USB port power.
Safety Information
Warning
A warning identifies conditions and actions that
pose hazards to the user. To avoid electrical
shock or personal injury, follow these guidelines:
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Do not point laser directly at eye or indirectly
off reflective surfaces.
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Before using the Thermometer inspect the
case. Do not use the Thermometer if it appears
damaged. Look for cracks or missing plastic.
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Replace the battery as soon as the battery
indicator appears.
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Do not use the Thermometer if it operates
abnormally. Protection may be impaired.
When in doubt, have the Thermometer
serviced.
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Do not operate the Thermometer around
explosive gas, vapor, or dust.
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To avoid a burn hazard, remember that highly
reflective objects will often result in lower
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Model 72-820: OPERATING MANUAL
than actual temperature measurements.
Do not use in a manner not specified by this
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manual or the protection supplied by the
equipment may be impaired.
Caution
To avoid damaging the thermometer or the
equipment under test protect them from the
following:
EMF (electro-magnetic fields) from arc
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welders, induction heaters, etc.
Static electricity.
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Thermal shock (caused by large or abrupt
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ambient temperature changes – all 30 minutes
from the Thermometer to stabilize before use).
Do not leave the Thermometer on or near
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objects of high temperature.
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Table 1 and Figure 1 show various symbols and safety
markings that are on the Thermometer and in this
manual.
Table 1. Symbols
Symbol
Explanation
Risk of danger. Important information.
See Manual.
Warning. Laser
Conforms to Standards of European Union
Low battery.
Model 72-820: OPERATING MANUAL
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Celsius and Fahrenheit Temperature Measurement
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Tripod mount
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Included 9V Battery
Thermometer features are shown in Figure 2.
Figure 1. Symbols and Safety Markings
Features
The Thermometer includes:
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Single-spot Laser Sighting
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Intelligent USB power source
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Backlit Display
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Two level white colour Backlit Display (when using
USB power up, this feature will be on automatically).
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Current Temperature Plus MIN, MAX, DIF, AVG
Temperature Displays/
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Easy Emissivity Selector
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Trigger Lock
Laser
Trigger
Battery Cover
Figure 2. Infrared Thermometer
Display
9V 6F22 Battery
Display
The primary temperature display reports the current or
last IR temperature read until the 8-second hold time
elapses.
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