Reed St-880 User manual

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Model ST-880

Infrared Thermometer

Instruction

Manual

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Features:

• Precise non-contact measurements

• Built-in laser pointer

• °C/°F switchable button

• Automatic Data Hold & Auto power off

• Measures a 1 inch target from a distance of 8 inches

• Backlit LCD display

Wide range application:

Food preparation, Safety and Fire inspectors, Plastic molding, Asphalt,

Marine and screen printing, measures ink and dryer temperatures, Diesel

and Fleet maintenance.

Field of View:

Meter’s eld of view is 8:1, meaning that if the meter is 8 inches from the

target, the diameter of the object under test must be at least 1 inch. Other

distances are shown below in the eld of view diagram. Refer to the chart

printed on the meter for more information.

Figure 1

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1. 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.

• Be careful no to let the beam deect off reective surface which could

strike your eye.

• Do not allow the laser light beam impinge on any gas which can explode.

2. SPECIFICATIONS

General specifications

DISPLAY 3-1/2 digit (1999count) LCD with backlighting

MEAS. RANGES -50°C to 280°C/-58°F to 536°F

RESPONSE TIME Less than 1 second

OVER RANGE INDICATION LCD will show “1”

POLARITY Automatic (no indication for positive polarity); Minus (-) sign for negative polarity.

EMISSIVITY 0.95 ﬁxed value

FIELD OF VIEW D/S = Approx. 8:1 ratio (D = distance, S = spot)

(Has 90% encircled energy at the focal point)

DIODE LASER Output <1mW, Wavelength 630~670nm,class 2 (II) Laser product

SPECTRAL RESPONSE 6~14um

POWER OFF Automatic shut off after 7 seconds, approx.

OPERATING TEMP. 0°C to 50°C (32°F to 122°F)

STORAGE TEMP. -20°C to 60°C(-4°F to 140°F)

RELATIVE HUMIDITY 10%~90%RH operating, <80%RH storage

POWER SUPPLY 9V battery, NEDA 1604A or IEC 6LR61, or equivalent

WEIGHT 180g.

SIZE 82 x 41.5 x 160mm

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Infrared thermometer specifications

3. FRONT PANEL DESCRIPTION

1 — IR sensor

2 — Laser pointer beam

3 — LCD Display

4 — °F select key

5 — °C select key

6 — Laser select key

7 — Backlight select key

8 — Measurement Trigger

9 — Battery Cover

10 — Handle Grip

Range Resolution Accuracy

-5°C to -20°C (-58°F to -4°F)

1°C/1°F

±5°C/±9°F;

-20°C to 280°C (-4 °F to 536°F)

±2% of reading or ±2ºC /±4°F

Note: Accuracy is given at 18°C to 28°C (64°F to 82°F), less than 80%RH.

Emissivity: 0.95 xed value

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.

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4. INDICATOR

1 — Digital readout

2 — Temperature °C (Celsius)

3 — Temperature °F (Fahrenheit)

4 — Measuring indication

5 — Data Hold

6 — LOW battery indicator

7 — Laser Point

8 — Fixed emissivity (0.95)

5. MEASURMENT OPERATION

1 — Hold the meter by its Handle Grip and point it toward the surface to

be measured.

2 — Squeeze and hold the Trigger to turn the meter on and begin testing.

The display will light if the battery is still good. Replace the battery if

the display does not light up.

3 — While measuring, the SCAN display icon will appear in the upper left

hand corner of the LCD.

4 — While continuing to squeeze the Trigger:

a. Push the Laser button to turn on the laser pointer. When the laser

is on the laser icon will appear on the LCD over the temperature.

Aim the red beam approximately a half inch above the point of

test (pressing the Laser button again turns the laser off).

b. Select the temperature units (°C or °F) using the °C & °F buttons.

c. Push the Backlight key to turn on the LCD backlighting function.

5 — Release the Trigger and the HOLD display icon will appear on the

LCD indicating that the reading is being held.

6 — The meter will automatically power down after approximately

7 seconds after the trigger is released.

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Note: Measurement considerations

Holding the meter by its handle, point the IR Sensor toward the object

whose temperature is to be measured. The meter automatically compen-

sates for temperature deviations from ambient temperature. Keep in mind

that it will take up to 30 minutes to adjust to wide ambient temperatures.

Several minutes is required after a low temperature is measure before a

high temperature measurement can be measured. This is a result of the

cooling process which must take place for the IR sensor.

6. BATTERY REPLACEMENT

1 — When battery power is not sufcient, the LCD will display “ ”.

Replacement with a 9V battery is required.

2 — Open the battery cover, take out the battery from instrument and

replace with a new 9-Volt battery and place the battery cover back.

Low battery indicator

Open the battery cover

9V battery

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7. NOTES:

• How it Works

Infrared thermometers measure the surface temperature of an object. The

unit’s optics sense emitted, reected, and transmitted energy, which is

collected and focused onto a detector. The unit’s electronics translate the

information into a temperature reading which is displayed 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

sure the target is at least twice as large as the 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. See: Figure 1 on Page 1.

• Locating a Hot Spot

To nd 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.

• Reminders

1 — Not recommended for use in measuring shiny or polished metal

surfaces (stainless steel, aluminum, etc.) See Emissivity below.

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

Most (90% of typical applications) organic materials and painted or oxi-

dized 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, cover the surface to be measured with masking tape or at

black paint. Allow time for the tape to reach the same temperature as the

material underneath it. Measure the temperature of the tape or painted

surface.

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Emissivity Values

Substance Thermal

Emissivity

Substance Thermal

Emissivity

Asphalt 0.90 to 0.98 Cloth (black) 0.98

Concrete 0.94 Human skin 0.98

Cement 0.96 Lather 0.75 to 0.80

Sand 0.90 Charcoal (powder) 0.96

Earth 0.92 to 0.96 Lacquer 0.80 to 0.95

Water 0.92 to 0.96 Lacquer (matt) 0.97

Ice 0.96 to 0.98 Rubber (black) 0.94

Snow 0.83 Plastic 0.85 to 0.95

Glass 0.90 to 0.95 Timber 0.90

Ceramic 0.90 to 0.94 Paper 0.70 to 0.94

Marble 0.94 Chromium oxides 0.81

Plaster 0.80 to 0.90 Copper oxides 0.78

Mortar 0.89 to 0.91 Iron oxides 0.78 to 0.82

Brick 0.93 to 0.96 Textiles 0.90

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Notes _________________________________________

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REED ST-880 User manual