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Summary of Contents for CEM DT-8833
- Page 1 Non-Contact Infrared Thermometers DT-8833 Operation Manual...
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Page 2: Table Of Contents
TABLE OF CONTENTS INTRODUCTION………………………………………………3 FEATURES…………………………………………………… 3 WIDE RANGE APPLICATION ………………………………4 SAFETY………………………………………………………… 4 DISTANCE & SPOT SIZE…………………………………… 5 SPECIFICATIONS…………………………………………… 6 FRONT PANEL DESCRIPTION…………………………… 8 INDICATOR…………………………………………………… 9 BUTTONS………………………………………………………9 MEASURMENT OPERATION………………………………12 BATTERY REPLACEMENT………………………………..15 NOTES……………………………………………………….15 MAINTENANCE & CLEARING…………………………. 19... -
Page 3: Introduction
INTRODUCTION Thank you for purchase of the 8833 IR Thermometer. This device offers non-contact (infrared) temperature measurements capability. The built-in laser pointer increases target accuracy while the backlight LCD and handy push-buttons combine for convenient, ergonomic operation. Type K thermocouple functionality is also built-in. Proper use and care of this meter will provide years of reliable service. -
Page 4: Wide Range Application
Trigger lock High and Low alarm Obtain Emissivity WIDE RANGE APPLICATION: Food preparation, Safety and Fire inspectors, Plastic molding, Asphalt, Marine and Screen printing, measure ink Dryer temperature, HVAC/R, Diesel Fleet maintenance. SAFETY Use extreme caution when the laser beam is turned on. Do not let the beam enter your eye, another person’s eye or the eye of an animal. -
Page 5: Distance & Spot Size
Distance & Spot Size As the distance (D) from the object increases, the spot size (S) of the area measured by the unit becomes larger. The relationship between distance and spot size for each unit is listed below. The focal point for each unit is 914mm (36”). The spot sizes indicate 90% encircled energy. -
Page 6: Specifications
SPECIFICATIONS TK measurement: TK Temperature range -50 to 1370 (-58 to 2498℉) Resolution to 1370 to 1999℉ 0.1℉ 2000 to 2498℉ 1℉ Accuracy -50 to 1000 ± 1.5% of reading + 3℃(±℉) 1000 to 1370 ± 1.5% of reading + (±3.6℉) IR Measurement: IR Temperature range -50 to 800... - Page 7 Response time less than 1 second Spectral response 8~14um Emissivity Digitally adjustable from 0.10 to 1.0 Over range indication LCD will show “-0L”,”0L” Polarity Automatic (no indication for positive polarity);Minus (-) sign for negative polarity Diode laser output <1mW, Wavelength 630~670nm, Class 2(II) laser product Operating temp.
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Page 8: Front Panel Description
Note: Accuracy: Given at 18 to 28 o C (64 to 82 ℉), less than 80 % RH. Field of View: Make sure that the target is larger than the unit’s spot size. The smaller the target, the closer you should be to it. When accuracy is critical, make sure the target is at least twice as large as the spot size. -
Page 9: Indicator
INDICATOR ① Data hold ② ② ② ② Measuring indication ③ ③ ③ ③ Emissivity symbol and value ④ ④ ④ ④ ℃/℉ symbol ⑤ ⑤ ⑤ ⑤ Auto obtain Emissivity ⑥ ⑥ ⑥ ⑥ lock and laser” on” symbols ⑦... - Page 10 ODE Button Function The infrared thermometer measures Maximum (MAX), Minimum (MIN), Differential (DIF), Average (AVG) Temp. Each time you take a reading. This data is stored and can MODE MODE be recalled with the MODE button until measurement taken. When the trigger is pulled again, the unit will begin measuring last...
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Page 11: Set Alarm
Alarm(LAL),Emissivity(EMS).Each time you press MODE, you advance through the mode cycle. Pressing the MODE button also allows you to access the Type k Temp. Measurement. The diagram shows the sequence of functions in the MODE cycle Switching C/F , LOCK ON/OFF and SET ALARM. -
Page 12: Measurment Operation
ALARM right. To set values for the High Alarm (HAL), Low Alarm (LAL) and Emissivity (EMS), firstly active the display by pulling the trigger or pressing the MODE button, then press the MODE button until the appropriate code appears in the lower left corner of the display, press the UP and down buttons to adjust the desired values. - Page 13 How to obtain Emissivity? In the EMS mode, press and hold the Laser/Backlight button until the “EMS” icon on the left side of LCD blinking. At this time, “ε= --” will appear at the upper side of the LCD; IR temperature value will be in the middle of LCD;...
- Page 14 suitable for obtaining a higher accuracy emissivity. After obtaining the emissivity, if the difference between IR value (in the middle of LCD) and TK value (at the lower side of LCD) is too big, the obtained emissivity will be incorrect. It’s necessary to obtain a new emissivity.
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Page 15: Battery Replacement
BATTERY REPLACEMENT ① As battery power is not sufficient, LCD will display “ ” replacement with one new 9V battery is required. ② Open battery cover, then take out the battery from instrument and replace with a new 9-Volt battery and place the battery cover back. - Page 16 Distance & Spot Size As the distance (D) from the object increases, the spot size (S) of the area measured by the unit becomes larger. See: Fig: 1. Locating a hot Spot To find a hot spot aim the thermometer outside the area of interest, then scan across with an up and down motion until you locate hot spot.
- Page 17 ② The unit cannot measure through transparent surfaces such as glass. It will measure the surface temperature of the glass instead. ③ Steam, dust, smoke, etc., Can prevent accurate measurement by obstructing the unit’s optics. Emissivity Emissivity term used describe energy-emitting characteristics of materials.
- Page 18 Substance Thermal Substance Thermal emissivity emissivity Asphalt 0.90 Cloth (black) 0.98 0.98 Concrete 0.94 Human skin 0.98 Cement 0.96 Lather 0.75 0.80 Sand 0.90 Charcoal 0.96 (powder) Earth 0.92 Lacquer 0.80 0.96 0.95 Water 0.92 Lacquer 0.97 0.96 (matt) 0.96 Rubber 0.94 0.98...
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Page 19: Maintenance & Clearing
Marble 0.94 Chromium 0.81 oxides Plaster 0.80 Copper 0.78 0.90 oxides Mortar 0.89 Iron oxides 0.78 0.91 0.82 Brick 0.93 Textiles 0.90 0.96 9. MAINTENANCE & CLEARING: Repairs or serving aren’t covered in this manual should only be performed by qualified personnel. Periodically wipe the case with a dry cloth.
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