Nova-Tech 4477 User Manual

SpecificationS Range: –4 to 572°F Resolution: 0.1 accuracy: Below 392°f ±4°F or ±2% (the larger

amount applies

above 392°f ±4% to + 2°C field of View: 6:1 ambient temperature range: 32 to 104°F emission factor (emissivity): 0.95 power supply: 4 x L1154 button cell

batteries

Battery Life: 2000 measurements

(depending on the usage)

Dimensions: (L” x W” x H”) 2¼ x 1 x 4 inches

GeneRaL

Press and hold the operating button for more than 1.5 seconds. The temperature of the surface the lens is aimed at will read on the top of the display. The minimum and maximum temperatures of the current measurement are shown on the bottom of the display. When the operating button is released “HOLD” will be displayed between “min” and “max” indicating the measurement is completed. After 4 seconds the backlight will turn off. The unit will switch off after 6 seconds. Press and hold the operating button again to begin a new measurement. To switch between °F and °C simply double click the operating button.

DeScRiption of meaSuRinG pRincipLe

When making a temperature measurement the surface radiation of the object to be measured is evaluated using the principle of radiation thermometry. This is a purely passive process, i.e. no radiation is transmitted, but instead, use is only made of the natural electromagnetic radiation energy (heat radiation) that every body above a temperature of absolute zero (–273°C) has. The temperature can be determined very accurately from this radiation energy if the emission factor of the object being measured is known.

opeRation i. Display and operator controls

All of the functions of the the measuring unit are controlled and monitored using the operating button and the back lit display. a. Temperature display –currently measured value b. Hold indicator c. Temperature display – minimum value d. Temperature display – maximum value e. Battery symbol – low battery indicator f. Temperature units – °F or °C g. Operating Button h. Lens

ii. makinG a meaSuRement

The object being measured should be a minimum of twice the size of the infrared thermometer’s measuring lens. The ideal measuring distance is 3 to 12 inches, which will yield a measurement area of 0.2 inch

to 3.2 inch2. As the

infrared thermometer is moved away from the object being

measured the area being measured increases (6:1 ratio). The infrared thermometer is switched on by holding

the operating button down for 1.5 seconds or more. By continuously holding down the operating button the measured value will be updated as long as the operating button is pressed. Releasing the operating button will nish the measurement. The “HOLD” indication signals that measuring has stopped. The backlight will shut off 4 seconds after the operating button is released. The infrared thermometer will automatically switch off 8 seconds after the last measurement. Holding down the operating button again will clear the minimum and maximum memory and begin a new measurement.

iii. minimum anD maximum tempeRatuRe inDication

The minimum and maximum value memories are cleared at the start of measurement by pressing the operating button. The temperature will be measured and the minimum and maximum temperatures will be determined for as long as the button is pressed. The minimum temperature is shown in the lower left-hand part of the display and the maximum temperature can be seen in the lower right-hand part of the display. These values each apply to the current measuring cycle and are cleared as soon as the button is pressed again.

iV. cHanGinG tHe tempeRatuRe unitS (°f/°c)

The units for the temperature display can be switched between degrees Celsius (°C) and degrees (°F) by

pressing the button briey twice (double click).

V. Back LiGHt

The LCD back light is constantly switched ON while the operating button is released, the back light will be ON for approximately 4 seconds before automatically switching off 8 seconds after the last measurement.

Vi. meaSuRement inaccuRacieS

The following points should be observed in order to avoid measurement errors: a. It must be ensured that the object to be measured

completely lls the infrared thermometer monitoring

area. Errors can occur when measuring small objects, as the unit also monitors the temperature of the surroundings as well as the object to be measured.

b. The principle of measurement requires the ambient

temperature to be determined. This takes place at one-minute intervals or each time the unit is switched on. Changes in the ambient temperature, which can occur when the user holds the unit in their hand, are not monitored within the time period and therefore taken into account when determining the indicated temperature. A gradual warming of the unit (the lens) between ambient temperature measurements can, for example, lead to the indicated temperature slowly falling.

c. If the emission factor for the object does not cor-

respond to the preset value of 0.95, the temperature will not be calculated correctly. Most surfaces have an emission factor in the range of 0.8 to 0.98. In general, the darker and more matte the surface is, the larger

their emissions factor. If the factor is greater than 0.95, the temperature indicated will be greater than the actual temperature of the object being measured. If the factor is less than 0.95, the temperature indicated will be less than the surface temperature. Polished metals have a very low emission factor and are therefore not suitable for measuring with an infrared thermometer. On the other hand, afxing adhesive tape to or painting the surface will increase the emission factor and reduce the inaccuracy of the measurement.

d. It is not possible to take measurements through

transparent materials (glass, plexiglas, etc.). e. It is not possible to measure air temperatures. f. Measurement errors can occur due to air

contaminated with dust, steam, smoke, etc.

Vii. tRouBLeSHootinG problem: Display shows -.-. Solution: The operating button has not been pressed

long enough. The operating button must be pressed for at least the duration of one measurement, i.e. for at least 1.5 seconds.

problem: Display shows Err1 Solution: The ambient temperature is outside the

permitted range

problem: Display shows 1 Solution: The measured value is outside the permitted

range.

problem: Battery symbol illuminates Solution: The batteries are dead.

maintenance i. cHanGinG tHe BatteRieS

If the battery symbol appears in the display, the batteries must be changed. The four button cells are accessible after opening the battery holders and replaced by new button cells of the same type. Only L1154 type batteries may be used. Care must be taken to ensure that the polarity is correct when inserting. The plus terminal of all four batteries should point upwards. The batteries must be checked to see that they are properly sealed before closing the battery compartment.

ii. cLeaninG

Clean the unit using only a dry cloth. If the unit is very dirty, the cloth may be slightly dampened. Do not use the cleaners containing solvents. Make sure that no moisture enters the interior of the unit. When cleaning the lens, loose particles must be removed using compressed air. Any remaining dirt can then be removed with a soft brush or with a cotton swab moistened with water.

caution Do not use cleaners containing solvents. faSteninG tHe infRaReD tHeRmometeR

A soft-sided pouch with a belt loop and a quick release neck strap are included with the infrared thermometer. To attach the infrared thermometer to the neck strap simply insert the clip of the neck strap into the buckle end of the thermometer until it clicks. To release, press both sides of the clip on the neck strap and pull the buckle end until it is free.

tecHnicaL infoRmation

1. accuracy: The larger of the two values given is ap-

plicable in each case.

2. Distance to measuring spot size (field of View): The parameter D:S characterizes the size of the measuring spot in proportion to the distance between the object to be measured and the Infrared Thermometer. For example, with a radio of 6:1 and a distance of 12 inches, the monitoring area will have a diameter of 12 inches.

3. emissions factor (emissivity): The physical quantity known as the emission factor describes to what extent the infrared heat radiation that is emitted from an object is determined by its own temperature. Accordingly, a value of 1 tells us that the infrared heat radiation from the object is based only on its own temperature. A value of less than 1 means that the radiation emitted from the object is not only determined

by its own temperature but also by reections from

neighboring bodies or due to the transmission, i.e. the diathermancy, of the object. The emission factor thus has an effect on the result of the measurement. The Infrared Thermometer works with an emission factor of 0.95, i.e. the measuring unit assumes that the object being monitored has a factor of 0.95. If this is not the case, there will be inaccuracies in the measurement (see Measurement Inaccuracies).

Warranty, service, or recalibration

For warranty, service, or recalibration, contact:

Control Company

4455 Rex Road

Friendswood, Texas 77546 USA

Ph. 281 482-1714

Fax 281 482-9448

E-mail sales@control3.com

www.control3.com

Control Company is ISO 9001

Quality-Certified by DNV and ISO 17025 accredited as a

Calibration Laboratory by A2LA.

traCeable

Infrared

thermometer,

KeyChaIn/

lanyard

InstruCtIons

is a registered trademark of Control Company