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HIGH PERFORMANCE HAND HELD
WD1119 Rev A
06/12/23
DHS40 SERIES
INFRARED THERMOMETER
USER MANUAL
DHS401M DHS40MT DHS40P3 DHS40LT
DHS402M
DHS40F4
DHS403M DHS40G5
DHS40G7
MODELS
DHS40P7
Palmer Wahl Instruments, Inc.
234 Old Weaverville Road
Asheville, NC 28804
Toll Free: 800-421-2853
Phone: 828-658-3131
Fax: 828-658-0728
www.palmerwahl.com
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Summary of Contents for Wahl Heat Spy DHS40 Series
- Page 1 HIGH PERFORMANCE HAND HELD INFRARED THERMOMETER USER MANUAL MODELS DHS401M DHS40MT DHS40P3 DHS40LT DHS402M DHS40F4 DHS40P7 DHS403M DHS40G5 DHS40G7 Palmer Wahl Instruments, Inc. 234 Old Weaverville Road Asheville, NC 28804 Toll Free: 800-421-2853 Phone: 828-658-3131 WD1119 Rev A Fax: 828-658-0728 06/12/23 www.palmerwahl.com...
- Page 2 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual Contents Heat Spy Warranty ..............................4 Safety Instructions ..............................4 Acceptable Operation ............................4 Unacceptable Operation ............................ 4 Instrument Disposal ............................4 Laser Warning..............................4 Includes ................................5 DHS40 Specifications .............................. 5 DHS40 Product Line ..............................
- Page 3 Temperature of Areas too Hot for Personnel ....................21 Temperature of Rough Surfaces ........................21 Temperature Requiring Quick Measurement ....................21 Emissivity Table ..............................22 Metals ................................22 Non-Metals ............................... 23 Thank you for purchasing a Wahl High Performance Hand-Held Infrared Thermometer. We appreciate your business.
- Page 4 Manufacturer. In addition, if the product is tampered with in any way or calibrated in any way other than by the instructions supplied by Palmer Wahl, it will immediately void the warranty.
- Page 5 13 x 6 x 15.5 in (330.2 x 152.4 x 393.7mm) / 2.2 lbs. (0.99 kg) Weight at ambient temperature 23°C, ε =1.0, NIST transfer standard. The Wahl DHS40 conforms to RoHS requirements according to EU Directive (EU) 2015/863- amending at ambient temperature 23°C.
- Page 6 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual DHS40 Product Line...
- Page 7 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual...
- Page 8 Wahl provides six (6) different spectrums in our thermopile versions. They are 3.43 micron, 3.9 micron, 4.11 to 4.72 micron, 5.0 micron, 7.9 micron and 8 to 14 micron.
- Page 9 As the distance from the object being measured increases, the spot size of the area being measured also increases. Wahl provides two (2) optics options for the DHS40 model, one (1) for both the photodiode and one (1) for the thermopile versions.
- Page 10 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual DHS40 Optics Diagrams DHS40 Features Trigger The trigger is contoured to fit the index finger. This is a single position trigger, which turns the instrument on when pulled. The display will show blank for a fraction of a second before the first reading appears to allow the microprocessor to complete its initial calculation cycles.
- Page 11 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual LCD Display ICONS Emissivity Setting Transmission Setting Backlight On/Off Alarm Low...
- Page 12 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual Alarm High °F or °C Hold Symbol Battery Status...
- Page 13 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual LCD Display ICONS Name Symbol Note Emissivity ɛ = x.xx See pg. Emissivity section and Appendix I Setting for 1M and 2M model, thru windows Transmission T = x.xx Glass: 0.92 Quartz: 0.88 Back Light BLIGHT...
- Page 14 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual During Measuring (Default) Far Left Button Center Left Button Center Right Button Far Right Button ⏎ Entering measuring mode Scrolling MAX/MIN/AVG/DEL in second temperature display During Setting Press “Menu” Button to enter Setting Mode Far Left Button Center Left Button Center Right Button...
- Page 15 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual Laser The laser beam defines the center of the target to be measured by projecting a spot of high intensity red light on the target surface. Note that the entire surface area to be measured is larger in diameter than the spot illuminated by the laser.
- Page 16 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual Telescopic Sight The telescopic sighting system used in the DHS40 allows precise aiming at a longer distance, or when measuring targets at higher temperatures. A filter in the lens reduces the glare from high heat, allowing for accurate temperature measurement of the required target.
- Page 17 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual Power Source The DHS40 is powered by a standard 9V type alkaline battery (Wahl PN: 12232). This battery is located in the handle, and is easily replaced. Normally, the battery supplied has 500 milliamp hours, providing about 140 hours of continuous duty.
- Page 18 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual The ideal material in non-contact temperature measurement and, in fact, the source against which instruments are calibrated is the black body. This is defined as a surface which emits the maximum amount of radiation at a given temperature.
- Page 19 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual Maintenance and Troubleshooting Each DHS40 is factory calibrated and certified against Wahl Standards. A NIST Certificate of Conformance stating the nominal and actual values and the deviation error is available separately. The instrument calibration must be periodically verified.
- Page 20 All solid objects emit infrared energy above absolute zero. The amount of energy emitted is proportional to the body temperature. Wahl’s DHS40 directs this energy by means of fixed focus optics into a sensitive detector, which is amplified and processed by the computer to temperature readings in °F or °C. It is fast, because IR energy travels at the speed of light, and the detector has a very low mass.
- Page 21 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual moving solid materials like plastic film and extrusions, pulp and paper, textiles, rubber, steel sheets, coating, or painting. Temperature of Small, Low Mass Material Electronic components or other small or low mass items can be measured with a DHS40, where a contact thermometer would change the measured condition through heat transfer.
- Page 22 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual Emissivity Table Metals Spectral Range 1.0 µm 1.6 µm 2.3 µm 5.1 µm 8-14 µm Aluminum Non-Oxidized 0.1-0.2 0.02-0.2 0.02-0.2 0.02-0.2 0.02-0.1 Oxidized 0.2-0.4 0.2-0.4 0.2-0.4 Alloy A 3003 Oxidized Roughened 0.2-0.8 0.2-0.6 0.2-0.6...
- Page 23 DHS40 Series High Performance Hand-Held Infrared Sensors User Manual Spectral Range 1.0 µm 1.6 µm 2.3 µm 5.1 µm 8-14 µm Platinum Black 0.95 0.95 Silver 0.04 0.02 0.02 0.02 0.02 Steel Cold-Rolled 0.8-0.9 0.8-0.9 0.8-0.9 0.8-0.9 0.7-0.9 Ground Sheet 0.5-0.7 0.4-0.6 Polished Sheet...
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