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Table of Contents 
1. Product Introductions

............... 1 

1-1 Features ................................ 1 
1-2 Applications ........................... 1 

2. Safety Information

..................... 2 

2-1 Warning ................................. 2 
2-2 Safety Symbols...................... 2 

3. Specifications

............................ 4 

4. Operation Instructions

.............. 5 

4-1 Quick Start............................. 5 
4-2 Unit Diagram ......................... 5 
4-3 Displays and Controls............ 5 
   4-3.1 Displays ........................... 5 
   4-3.2 Lock................................. 5 
   4-3.3 °C/°F Switch .................... 5 
   4-3.4 Laser ............................... 6 
   4-3.5 Battery ............................. 6 
4-4 Advanced Functions .............. 7 
4-5 Memory ................................. 8 
   4-5.1 Memory Read .................. 8 
   4-5.2 Memory Ease .................. 8 
   4-5.3 memory Record ............... 8 

5. Technical Information

............... 9 

5-1 Distance to Spot Ratio........... 9 
5-2 Emissivity .............................. 9 

 Emissivity Table ........................... 10 

6. Maintenance

.............................. 11 

6-1 Lens....................................... 11 
6-2 Housing ................................. 11 

 

 

 

Summary of Contents for DHS235XEL

Page 1: ...DHS235XEL WD1048 Rev A 04 10 10 High Performance Infrared Thermometer with High D S Ratio Adjustable Emissivity and Built in Laser Sighting ...

Page 2: ...5 4 1 Quick Start 5 4 2 Unit Diagram 5 4 3 Displays and Controls 5 4 3 1 Displays 5 4 3 2 Lock 5 4 3 3 C F Switch 5 4 3 4 Laser 6 4 3 5 Battery 6 4 4 Advanced Functions 7 4 5 Memory 8 4 5 1 Memory Read 8 4 5 2 Memory Ease 8 4 5 3 memory Record 8 5 Technical Information 9 5 1 Distance to Spot Ratio 9 5 2 Emissivity 9 Emissivity Table 10 6 Maintenance 11 6 1 Lens 11 6 2 Housing 11 ...

Page 3: ...afety and processing Perform HVAC energy audits 1 Read the following safety information carefully before attempting to operate or service the instrument Only qualified personnel should perform repairs or service not covered in this manual 2 1 Warning DO NOT submerge the instrument in water This product is not designed for use in medical evaluations This product is intended for use in industrial sc...

Page 4: ...re of 25 C 77 F 5 4 F 3 C From 58 to 4 F 50 to 20 C 3 F 2 C From 4 to 212 F 20 to 100 C 2 From 212 to 2732 F 100 to 1500 C Spectral Range 8 to14µm Repeatability 2 F 1 C Resolution 0 1 F or C Response Time 500 mS Operation Temp 32 to 122 F 0 to 50 C 10 to 90 RH Auto Power Off Automatically after approx 6 seconds Emissivity Adjustable 0 10 to 1 00 F C Switchable YES Backlight YES Laser Sight Switcha...

Page 5: ...Secondary display The unit will HOLD the last reading for 6 seconds after the trigger is released 4 3 2 Lock Push the button to continuously measure and display the temperature without pulling the measuring trigger 4 3 3 C F Switch the C F switch is located in the battery compartment and is accessed by following steps 1 and 2 on pg 6 5 4 3 4 Laser On Off Switch the Laser On Off Switch is located i...

Page 6: ...g DATA0 See Memory Erase section below Pressing the or arrows will scroll the DATA location and display the corresponding data on the secondary display The specific parameter such as Actual Max Min Etc will also be displayed No parameter displayed indicates the data is the Actual measurement 4 5 2 Memory Erase when DATA0 is selected the secondary display will display CL This is only used for erasi...

Page 7: ...inaccurate measurement due to the averaging of the target with the surrounding areas 5 2 Emissivity Emissivity is the relative ability of an object to emit energyby radiation Perfect emitters have an emissivity of 1 emitting 100 of incident energy An object with an emissivity of 0 8 will absorb 80 and reflect 20 of the incident energy Emissivity is defined as the ratio of the energy radiated by an...

Page 8: ...Lens clean the lens by blowing off loose particles using clean compressed air Gently brush remaining debris away with a camel hair brush Use a cotton swab moistened with distilled water to carefully wipe the lens surface Note DO NOT use solvents to clean the lens 6 2 Housing Clean by wiping with a damp soft cloth Mild detergent may be used as needed 11 Wahl Instruments Inc 234 Old Weaverville Road...

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