Tenma 72-820 Operating Manual
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Tenma 72-820 Operating Manual

Tenma 72-820 Operating Manual

Tenma infrared thermometer operating manual
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TENMA 72-820 OPERATING MANUAL
http://www.manuallib.com/file/2592895
From ManualLib.com
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This Manual: http://www.manuallib.com/file/2592895

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  • Page 1 TENMA 72-820 OPERATING MANUAL http://www.manuallib.com/file/2592895 From ManualLib.com ManualLib.com collects and classifies the global product instrunction manuals to help users access anytime and anywhere, helping users make better use of products. Home: http://www.manuallib.com/ Chinese: http://www.shuomingshuku.com/ This Manual: http://www.manuallib.com/file/2592895...
  • Page 2 72-820 Infrared Thermometer This Manual: http://www.manuallib.com/file/2592895...
  • Page 3 Model 72-820 OPERATING MANUAL This Manual: http://www.manuallib.com/file/2592895...

  • Page 4: Table Of Contents

    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...
  • Page 5 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...
  • Page 6 Model 72-820: OPERATING MANUAL List of Tables Table Title Page Symbols Buttons and Connector Surface Emissivity Troubleshooting This Manual: http://www.manuallib.com/file/2592895...
  • Page 7 Model 72-820: OPERATING MANUAL List of Figures Figure Title Page Symbols and Safety Markings Infrared Thermometer Thermometer Display Buttons and Connector Locating Hot or Cold Spot Distance and Spot Size Field of View This Manual: http://www.manuallib.com/file/2592895...

  • Page 8: Introduction

    Model 72-820: OPERATING MANUAL Introduction Safety Information The Model 72-820 Infrared Thermometer (hereafter, the “Thermometer”) can determine the surface temperature Warning by measuring the amount of infrared energy radiated A warning identifies conditions and actions that by the target’s surface. They have different distance to pose hazards to the user.

  • Page 9: Symbols

    Model 72-820: OPERATING MANUAL Table 1 and Figure 1 show various symbols and safety than actual temperature measurements. markings that are on the Thermometer and in this Do not use in a manner not specified by this manual. manual or the protection supplied by the equipment may be impaired.

  • Page 10: Features

    Model 72-820: OPERATING MANUAL Celsius and Fahrenheit Temperature Measurement Tripod mount Included 9V Battery Thermometer features are shown in Figure 2. Laser Display Figure 1. Symbols and Safety Markings Features Trigger The Thermometer includes: Single-spot Laser Sighting Battery Cover Intelligent USB power source...
  • Page 11 Model 72-820: OPERATING MANUAL The secondary temperature display reports a choice of maximum, minimum, difference between maximum and minimum temperature or average value. You can toggle through the maximum, minimum, difference and average IR temperatures anytime the display is on. The MAX, MIN, DIF and AV temperatures are constantly calculated and updated when the trigger is pressed.

  • Page 12: Buttons And Connector

    Model 72-820: OPERATING MANUAL Table 2. Buttons and Connector Buttons and Connector Button / Description Connector Press MODE button to toggle between MAX, MIN, MODE DIF, and AVG options. Press MODE to turn the Thermometer on again and displays the last measurement result.

  • Page 13: How The Thermometer Works

    Model 72-820: OPERATING MANUAL How the Thermometer Works Infrared thermometers measure the surface temperature To find a hot or cold spot, aim the Thermometer outside of an opaque object. The Thermometer’s optics sense the target area. Then, slowly scan across the area with...

  • Page 14: Distance And Spot Size

    Model 72-820: OPERATING MANUAL As the distance (D) from the target being measured Make sure that the target is larger than the spot size. increases, the spot size (S) of the area measured by The smaller the target, the closer you should be to it.

  • Page 15: Emissivity

    Model 72-820: OPERATING MANUAL base on your own case and materials to have different setting. Emissivity describes the energy-emitting characteristics of materials. Most organic materials and painted or To adjust values for emissivity, follow the below oxidized surfaces have an emissivity of about 0.95.

  • Page 16: Surface Emissivity

    Model 72-820: OPERATING MANUAL Table 3. Surface Emissivity Measure Surface Switch Setting Measure Surface Switch Setting METALS Aluminum Iron Cast Oxidized 0.2-0.4 Oxidized 0.6-0.95 Alloy A3003 Unoxidized Oxidized Molten 0.2-0.3 Roughened 0.1-0.3 Iron Wrought Brass Dull Burnished Lead Oxidized Rough...
  • Page 17 Model 72-820: OPERATING MANUAL Table 3. Surface Emissivity Measure Surface Switch Setting Measure Surface Switch Setting Ground Sheet Iron 0.4-0.6 0.5-0.9 Polished Sheet Oxidized 0.5-0.7 Zinc Rusted Oxidized NON-METALS 0.95 Glass Asbestos 0.95 Plate Asphalt 0.85 Gravel Basalt 0.95 Gypsum Carbon 0.8-0.95...

  • Page 18: Trigger Lock

    Model 72-820: OPERATING MANUAL The display will remain activated 8 seconds after the To lock or unlock the trigger, use the following trigger is released. HOLD appears in the upper middle procedures: of the display. When the trigger is pulled again, the 1.

  • Page 19: Testing Contactors (Starters)

    Model 72-820: OPERATING MANUAL the user may cover the surface (temperature >150 with black electric tape (emissivity of about 0.95). Allow Press SET and then press to set emissivity to time for the tape to reach the same temperature as the relatively low for uninsulated connectors or relatively object to be measured.

  • Page 20: Testing Electrical Connections

    Model 72-820: OPERATING MANUAL buss connections. Press MODE to select MAX. Scan each end cap on each fuse/ Turn off heating, cooling, and blower. Press SET to select emissivity. Press to select emissivity relatively high for painted surfaces or window surfaces.

  • Page 21: Testing Bearings

    Model 72-820: OPERATING MANUAL Turn on the blower (no heat, no cooling) and retest. If test results with the blower on are different than results with the blower off, this may indicate air leaks in conditioned envelope walls. The air leaks are caused...

  • Page 22: Testing Belts And Sheaves

    Model 72-820: OPERATING MANUAL & yaw”) for belt and sheaves to operate at appropriate temperatures. A straight edge or taut string, can be Press SET and then press to select relatively used to check alignments. high emissivity. Motor sheave should operate at a temperature Press MODE to select MAX.

  • Page 23: Checking Hydronic Radiant Heat Applications

    Model 72-820: OPERATING MANUAL Radiant heat tubes in the floor will normally run parallel to the outside walls. Starting at the floor wall juncture, Press SET and then press to select relatively scan parallel to the wall while moving into the room high emissivity.

  • Page 24: Maintenance

    Model 72-820: OPERATING MANUAL Maintenance To install or change the 9V battery, open the battery Remove panels to gain access to coil return bends compartment the battery as shown in Figure 2. or hairpins. Press SET and then press to select relatively high emissivity for copper tube.

  • Page 25: Troubleshooting

    Model 72-820: OPERATING MANUAL Troubleshooting Table 4. Troubleshooting Symptom Problem Action OL (on display) Target temperature is over range Select target with specifications -OL (on display) Target temperature is under range Select target with specifications Low Battery Replace Battery Blank Display...

  • Page 26: Specifications

    Model 72-820: OPERATING MANUAL Specifications Measurement Range--------------------------------------------------------18 C to 550 C (0 F to 1022 Spectral Range -------------------------------------------------------------- 8 to 14 microns Accuracy ---------------------------------------------------------------------- 1.8% or (1.8 Temperature than less 0 C , Accuracy add to 1 (Assumes ambient operating temperature of 23 to 25 C (73 to 77 Repeatability ----------------------------------------------------------------- 0.5% of reading or 1...

  • Page 27: Laser

    Model 72-820: OPERATING MANUAL Weight ----------------------------------------------------------------------------- 0.322kg Size ---------------------------------------------------------------------------------17.69cm (H) x 16.36 cm (L) x 5.18cm (W) Operating Temperature Range ---------------------------------------------- 0 C to 50 C (32 F to 120 Relative Humidity ----------------------------------------------------------------0 to 75% noncondensing Storage Temperature ---------------------------------------------------------- -20...
  • Page 28 Model 72-820: OPERATING MANUAL ** END ** This operating manual is subject to change without notice. This Manual: http://www.manuallib.com/file/2592895...
  • Page 29 Model 72-820: OPERATING MANUAL Copyright 2007 Tenma Test Equipment. All rights reserved. Tenma Test Equipment 405 S. Pioneer Blvd. Springboro,Ohio 45066 www.tenma.com This Manual: http://www.manuallib.com/file/2592895...

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