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Thank  you  for  purchasing  the  Wahl  DHS235XEL  non-
contact infrared thermometer. To  measure  a temperature, 
simply  point  the  unit  at  the  object,  pull  the  trigger  and 
read the display. Releasing the trigger will put the unit into 
hold  mode,  which  will  display  the  captured  reading  for 
approximately 6 seconds before powering off. Make sure 
the target area is larger than the unit’s spot size. For large 
target objects assure you are within target distance. 

 
 

 

The  DHS235XEL  features  a  wide  temperature  range, 
and high D:S (Distance to Spot) ratio, allowing the user 
to  measure  high  temperature  objects  from  a  safe 
distance. 

 

High DS ratio. 
Adjustable emissivity from 0.1 to 1.00 in 0.01 steps. 
Ultra low power consumption in shutdown mode. 
Extended long time measuring reliability. 
Backlit Liquid Crystal Display (LCD). 
°C or °F selectable. 
Electronic trigger lock. 

 
 

 

Electrical troubleshooting. 
Automotive repair and maintenance.  
Science experiment. 
Manufacturing processes of semiconductor technology. 
Test terminals on circuits. 
Food safety and processing. 
Perform HVAC energy audits. 

 
 
 

 

 

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, scientific 
and educational purposes only. 

 

 

 

Dangerous, refer to this manual before using 
the meter. 

   CE Certification. 

This instrument conforms to the following standards: 

EN61326: Electrical equipment for measurement, 

control and laboratory use.

 

IEC61000-4-2: Electrostatic discharge immunity test. 
IEC61000-4-3: Radiated, radio-frequency,

 

electromagnetic field immunity test. 

IEC61000-4-8: Power frequency magnetic field

 

immunity test.

 

Tests were  conducted using  a  frequency  range  of  80-
1000MHz with the instrument in three orientations. The 
average  error  for  the  three  orientations  is  ±0.5°C 
(±1.0°F)  at  3V/m  throughout  the  spectrum.  However, 
between 781-1000MHz at 3V/m, the instrument may not 
meet its stated accuracy. 

Do not point laser directly at eye. Use 

caution around reflective surfaces. Keep out of 
reach of children. 

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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