Extech Instruments TM300 Bedienungsanleitung

User's Guide

Dual Input J/K Type Thermometer

Model TM300

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

TM300-EU-EN-V1.2 8/11

WARNING

To avoid electrical shock or personal injury, do not apply more than

20Vrms between the thermocouple inputs or between the thermocouple

and earth ground

Introduction

Congratulations on your purchase of the Extech TM300 Digital Thermometer with K/J -

type dual input. This meter is shipped fully tested and calibrated and, with proper use,

will provide years of reliable service.

Features

1. Large backlit display shows any combination of T1, T2, T1-T2, plus MAX, MIN,

AVG.

2. Relative time clock on MAX MIN and AVG provides a time reference for major

events.

3. Electronic Offset function allows compensation of thermocouple errors to maximize

overall accuracy.

4. Readout in °C, °F, or Kelvin (K).

5. Auto Power Off mode (Sleep mode) increases battery life.

Safety

•To prevent personal injury or meter damage, use the meter only as specified in

this guide

•If the low battery indicator appears, replace the batteries immediately. Inaccurate

temperature reading could result from low battery voltage.

•Do not operate the meter in an explosive atmosphere

TM300-EU-EN-V1.2 8/11

SETUP HOLD

T1-T2

REC MAX MIN AVG

TYPE

hour:min

min:sec

123

Meter Description

Meter

1. T1 Thermocouple input connector

2. T2 Thermocouple input connector

3. Function buttons (Hold, MAX/MIN, Set)

4. Function buttons (Power, Enter,T1 T2 T1-T2, C-F-K)

5. Battery compartment (rear)

Display

1. Setup mode

2. Hold mode

3. Auto power off mode active

4. Upper display: T1, T2 or T1-T2 reading

5. Temperature units

6. Lower display: T1 and T2 readings,

MAX, MIN, AVG, and OFFSET values

7. MAX, MIN, and AVG mode icons

8. Timer display

9. MIN:SEC or HOUR:MIN display

10. K/J type thermocouple

11. Low Battery

TM300-EU-EN-V1.2 8/11

Operation

Connecting thermocouples

1. This meter accepts one or two K or J-type thermocouples with spade lugs (sub-

miniature type with one spade wider than the other).

2. Plug the thermocouple(s) into the meter's thermocouple input jack(s).

Measuring

1. Press the button to turn on the thermometer on. After 1 second the

thermometer will display the T1 reading in the upper display and the T2 reading in

the lower display. The display will indicate dashes (----) if no thermocouple is

connected to the input.

2. Press the C-F-K button to select the desired temperature unit of measure. A

display icon will reflect the selection.

3. Contact the object to be measured with the probe. Read the measured temperature

in the display.

Note: If the display indicates “OL” the temperature is outside the measurement

range. The display shows "- - - -" when a thermocouple is not connected.

MAX/MIN/AVG mode

Press the MAX/MIN button to begin recording the Maximum, Minimum and Average

measure value. “REC” and “MAX” will appear on the display and the elapsed time

display will appear.

1. Press MAX/MIN to enter this mode.

2. Press MAX/MIN to step through maximum, minimum and average readings.

3. Press and hold MAX/MIN for 3 seconds to return to normal mode.

Data Hold

Press the HOLD button to freeze the reading in the display. HOLD will appear at the top

right of the display. Press the HOLD button again to return to normal operation mode.

T1 T2 T1-T2

Press the T1 T2 T1-T2 button to cycle through the four display combinations.

No. Upper Display Lower display

1 T1 T2

2 T2 T1

3 T1-T2 T1

4 T1-T2 T2

C●F●K

Press the C●F●Kbutton to select the displayed temperature units

Backlight

Press the SETUP button to turn the LCD backlight ON/OFF.

TM300-EU-EN-V1.2 8/11

Setup Mode Options

Use the Setup mode to select the thermocouple type, program a display offset, or

disable/enable the sleep mode. The thermometer stores the settings in its memory.

Press and hold the SET button for 3 seconds to enter or exit the Setup mode. When the

thermometer is in Setup mode, the display shows the SETUP icon. Use the ENTER

buttons or the arrow buttons to scroll through the “TYPE”, “SLP” (sleep mode), and

“T1/T2” (offset) parameters.

Set Type J or K thermocouple

1. From within the Setup mode (see the Setup Mode Options paragraph above for

accessing Setup mode) use the ▲or ▼button to scroll to the “TYPE” setting.

2. Press ENTER to access the parameter.

3. Use the ▼button to toggle between J and K.

4. Press ENTER to save the setting.

5. Press and hold the SET button for 3 seconds to return to the normal operating

mode or press ENTER to move to the “SLP” setting (sleep mode).

Set Sleep/Non-sleep mode

The thermometer enables the sleep mode option by default where the meter will

automatically shut off after 20 minutes of inactivity.

1. From within the Setup mode (see the Setup Options paragraph above for

accessing Setup mode) use the ▲or ▼button to scroll to the “SLP” parameter if

necessary.

2. Press ENTER to access the parameter.

3. Use the ▲button to select ON (sleep mode enable) or OFF (sleep mode disabled).

4. Press ENTER to store the new setting in memory.

5. Press and hold the SET button for 3 seconds to return to the normal operating

mode or press ENTER to move to the “T1” offset setting.

Set T1 or T2 Offset

Use the offset feature (T1 or T2 Setup menu item) to adjust the thermometer’s readings

to compensate for a known temperature offset at a specific temperature. The allowable

adjustment range is ± 5.0°C or ± 9.0 °F.

1. Plug the thermocouple into the input connector.

2. Place the thermocouple into a known, stable temperature environment (such as an

ice bath or dry well calibrator). Allow the reading to stabilize.

3. From within the Setup mode (see the Setup Mode Options paragraph above for

accessing Setup mode) press ▲or ▼to scroll to the “T1”or “T2” option and then

press ENTER.

4. Use the arrow ▲or ▼buttons to adjust the offset. The lower digits show the offset

amount while the upper digits show the actual temperature with the offset applied.

5. Press the ENTERbutton to store the value and move to the next parameter.

6. Press and hold the SET button for 3 seconds to return to normal mode.

TM300-EU-EN-V1.2 8/11

Replacing the Batteries

If the low battery icon appears, replace the batteries immediately to avoid inaccurate

readings.

1. Turn off the thermometer.

2. Loosen the screw and remove the battery door.

3. Replace the AAA batteries.

4. Replace the battery door and tighten the screw.

You, as the end user, are legally bound (EU Battery ordinance) to return all

used batteries, disposal in the household garbage is prohibited! You can

hand over your used batteries / accumulators at collection points in your

community or wherever batteries / accumulators are sold!

Disposal: Follow the valid legal stipulations in respect of the disposal of the

device at the end of its lifecycle

Specifications

Temperature Range:

K type thermocouples -328°F to 2501°F (-200°C to 1372°C) (73°K to 1645°K)

J type thermocouples -346°F to 2012°F (-210°C to 1100°C) (63°K to 1373°K)

Temperature accuracy:

T1, T2 >-148°F (–100°C) ± [0.15%rdg+1.8°F (1°C)]

T1, T2 <-148°F (–100°C) ± [0.5%rdg+3.6°F (2°C)]

T1-T2 ± [0.5%rdg+1°C (1.8 °F)]

Display Resolution: 0.1°<1000°, 1°>1000°

Battery: “AAA” 1.5V × 3

Operating Temperature: 32°F to 122°F (0°C to 50°C)

Storage Temperature: 14°F to 122°F (10°C to 50°C)

Dimensions: 8.7 x 2.5 x 1.1” (220 x 63 x 28mm)

Weight: 7 oz. (200g)

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com

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