CEM DT-8861 Operating Manual

Non-Contact Infrared Thermometers

Operating Manual

3p

04/07-61

TABLE OF CONTENTS

INTRODUCTION ………………………………………3

FEATURES ……………………………………………3

WIDERANGEAPPLICATION ………………………… 4

SAFETY ……………………………………………… 4

DISTANCE&SPOTSIZE ……………………………… 5

SPECIFICATIONS …………………………………… 6

FRONTPANELDESCRIPTION ……………………… 8

INDICATOR ……………………………………………8

BUTTONS ………………………………………………9

MEASURMENTOPERATION ………………………… 10

BATTERYREPLACEMENT …………………………… 13

NOTES ……………………………………………… 13

MAINTENANCE …………………………………… 17

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INTRODUCTION

Thank you for purchase of the IR Thermometer. This is capable of non-contact (infrared) temperature measurements at the touch of a button. The built-in laser pointer increases target accuracy while the backlight LCD and handy push-buttons combine for convenient, ergonomic operation.

The Non-contact Infrared Thermometers can be used to measure the temperature of objects’ surface that is improper to be measured by traditional (contact) thermometer (such as moving object, the surface with electricity current or the objects which are uneasy to be touched.)

Proper use and care of this meter will provide years of reliable service.

FEATURES: z Rapid detection function z Precise non-contact measurements z Dual laser sighting z Unique flat surface, modern housing design z Automatic Data Hold z ℃ / ℉ switch z Emissivity Digitally adjustable from 0.10 to 1.0

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z MAX temperature displays z Backlight display z Automatic selection range and Display Resolution 0.1

º

C(0.1

º F) z Trigger z Set high and low alarms

WIDE RANGE APPLICATION:

Food preparation, Safety and Fire inspectors, Plastic molding, Asphalt, Marine and Screen printing, measure ink and Dryer temperature, HVAC/R, Diesel and Fleet maintenance.

SAFETY z Use extreme caution when the laser beam is turned on. z Do not let the beam enter your eye, another person’s eye or the eye of an animal. z Be careful no to let the beam on a reflective surface strike your eye. z Do not allow the laser light beam impinge on any gas which can explode.

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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.

D:S= 12:1

12.5mm @ 150mm 25mm @ 300mm

S

0.5in @ 6in.

D

1in @ 12in.

1. SPECIFICATIONS

Temperature range D: S

-50 to 550 oC(-58 ℉ ~ 1022 ℉ ) 12:1

Display resolution 0.1 oC(0.1

℉ ) <1000

1 ℉ >1000

Accuracy for targets:

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Assumes ambient operating temperature of 23 to 25 oC (73 to 77 ℉ )

-50 ~ 20 ℃( -58 ℉ ~ 68 ℉) ±2.5℃(4.5℉)

20

℃

~300

℃(68℉

~572

℉) ±1.0% ±1.0℃(1.8℉)

300

℃

~550

℃(572℉

~ 1022 ℉) ±1.5%

Repeatability

-50

~

20℃(-58

~

68℉) : ±1.3℃(2.3℉)

20 ~ 550℃(68 ~ 1022℉): ±0.5% or ±0.5℃(0.9℉)

Response time 150ms

Spectral response 8~14um

Emissivity Digitally adjustable from 0.10 to 1.0

Over range indication LCD will show “----”

Polarity Automatic (no indication for positive polarity);

Minus (-) sign for negative polarity

Diode laser output <1mW,Wavelength 630~670nm,

Class 2 laser product

Operating temp. 0 to 50 ℃ (32 to 122 ℉ )

Storage temp. –10 to 60 ℃ (14 to 140 ℉ )

Relative humidity 10%~90%RH operating,

<80%RH storage

Power supply 9V battery, NEDA 1604A or IEC 6LR61, or equivalent

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Safety “ CE ” Comply with EMC

Note: z 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.

2. FRONT PANEL DESCRIPTION

① IR sensor

② LCD Display Laser pointer beam

③ up button

④ down button

⑤ mode button

⑥ Measurement Trigger

⑦ Battery Cover

⑧ Handle Grip

3. INDICATOR

① Data hold

② Laser ” on” symbols

③ Lock symbol

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④ High alarm and low alarm symbol

⑤ ℃ / ℉ symbol

⑥ Low power symbols

⑦ Emissivity symbol and value

⑧ Temperature values for the MAX

⑨ Symbols for MAX

⑩ Current temperature value

4. Buttons

① Up button (for EMS,HAL,LAL)

② Down button (for EMS,HAL,LAL)

③ MODE button

(for cycling through the mode loop)

Functional Design

1. the switches of C/F sat in a cell switching

Emissivity.

3. IN the hold time, up keys to turn on or off the laser

Down keys to turn on or off the backlight

4. To set values for the High Alarm (HAL), Low Alarm (LAL) and Emissivity (EMS), press the MODE button until the

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appropriate code appears in the display, press the UP and down buttons to adjust the desired values.

EMS adjustment

LOCK on/off

HAL on/off

HAL adjustment

LOW on/off

LOW adjustment

MODE Button Function

Press the mode button also allows you to access the set state,Emissivity(EMS),Lo ck on/off,HAL on/off, HAL adjustment LOW on/off,LOW adjustment,Each time you press set you advance through the mode cycle.

The diagram shows the sequence of functions in the mode cycle.

EMS adjustment.

The

Emissivity(EMS) digitally adjustable from 0.10 to 1.0, LOCK on/off. The lock mode is particularly useful for continuous monitoring of temperatures. Press the up button or down button to

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turn on or off . Press the Measurement Trigger to confirm the lock measurement mode. The IR

Thermometer will continuously display the temperaure until press again the Measurement Trigger.

In lock mode, press the up button or down button adjustable the Emissivity.HAL (LOW) on/off. Press the up button or down button to turn on or turn off.

Press the Measurement Trigger to confirm the

High(Low)alarm mode.Hal(LOW) adjustment. The high(Low) alarm adjustable form

-50 to 550 oC(-58 ℉ ~ 1022 ℉ )

Switching C/F

Select the temperature units ( o

C or o

F) using the o

C / o

F switch ( ① )

Max indicate the max record that displays between the pressing and releasing the "ON/OFF" button each time

MEAS UREMENT OPERATION

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① Hold the meter by its Handle Grip and point it toward the surface to be measured.

② P ull and hold the Trigger to turn the meter on and begin testing. The display will light if the battery is good. Replace the battery if the display does not light.

③ Release the Trigger and the HOLD display icon will appear on the LCD indicating that the reading is being held. In HOLD status, press the UP button to turn on or off the laser. And p ress the DOWN button to turn on or off the backlight.

④ The meter will automatically power down after approximately 7 seconds after th e trigger is released.(Unless the unit is locked on)

Not e: Measurement considerations

Holding the meter by its handle, point the IR Sensor toward the object whose temperature is to be measured.

The meter automatically compensates for temperature deviations from ambient temperature. Keep in mind that it will take up to 30 minutes to adjust to wide ambient temperatures are to be measured followed by high

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temperature measurements, some time (several minutes) is required after the low (and before the high) temperature measurements are made.

This is a result of the co oling process, which must take p lace for the IR sensor.

5. REPLACEMENT

① As battery power is not sufficient, LCD will display

“ ” replacement with one new battery type 9V 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. z

6 . NOTES:

How it Works

Infrared thermometers measure the surface temperature of an object. The unit’s optics sense emitted, reflected, and transmitted energy, which is

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z collected and focused onto a detector. The unit’s electronics translate the information into a temperature reading, which is display on the unit. In units with a laser, the laser is used for aiming purposes only.

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 su re the target is at least twice as large as th e spot size. z z

Distance & Spot Size

As the distance (D) from the object increases, the spot size (S) of the are a 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 w ith an up and down motion until y ou locate hot spot. z Reminders

① Not recommended for use in measuring shiny or polished metal surfac es ( stainless steel, aluminum, etc.).See Emissivity

② The unit cannot measure through transparent surfaces

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such as glass. It will measure the surface temperature of the glass instead.

③ Steam, dust, smoke, etc., Can prev ent accurate measurement by obstructi ng the unit’s optics. z Emissivity

Emissivity is a term used to desc ribe the energy-emitting characteristics of materials.

Most (90% of typical applications) organic materials and painted or oxidized surfaces have an emissivity of

0.95 (pre-set in the unit). Inaccurate readings will result from measuring shiny or polished metal surfaces. To compensate, cove the surface to be measured with masking tape or flat black paint. Allow time for the tape to reach the same temperature as the material underneath it. Me asure the temperature of the tape or p ainted surface.

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Emissivity Va lues

Substance Thermal emissivity

Substance Thermal emiss

Asphalt 0.90 to 0.98

Cloth (black) 0.98 ivity

Concrete 0.94

Cement

Sand

0.96

0.90

Lather

Charcoal

(powder)

0.75 t

0.96 o 0.80

Earth

Water

Ice

Plaster

0.92 to 0.96

Lacquer

0.92 to 0.96

0.96 to 0.98

0.83

Lacque

(matt)

Rubber

(black) r

Plastic Snow

Glass

Ceramic

0.90 to 0.95

0.90 t

Marble 0.94 o 0.94

Timber

Paper

0.80 to 0.90

0.80 t

0.97

0.94 o 0.95

0.85 to 0.95

0.90

0.70 to

Chromiu m 0.81 oxides

Copper oxides

0.78

0.94

Mortar

Brick

0.89 to 0.91

Iron oxides

0.93 to 0.96

Textiles

0.78 t o 0.82

0.90

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7. MAINTENANCE z Repairs or service are not covered in this manual and should only be carried out by qualified trained technician. z Periodically, wipe the body with a dry cloth . Do not use abrasives or solvents on this instrument. z

For service, use only manufacturer’s spec ified parts.

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