Extech Instruments TM200 Manual de usuario

User Guide

Type K Dual Input Thermometer

Model TM200

Introduction

Congratulations on your purchase of the Extech TM200 Type K Dual Input Thermometer.

This instrument offers a dual thermocouple input and a multifunction LCD display.

Additional features include differential temperature measurement (T1-T2), Data Hold,

push-button Offset adjustment, and MIN/MAX/AVG displays. This meter is shipped fully

tested and calibrated and, with proper use, will provide years of reliable service.

TM200 V4.1 11/062

12 13

Meter Description

1. LCD display

2. T1, T2, T1-T2 display select button

3. Power button

4. SETUP button

5. Backlight button

6. Min/Max button

7. oCoF Kelvin (oK) select button

8. Data Hold button

9. Down arrow button

10. ENTER button

11. Up arrow button

12. T2 Thermocouple input socket

13. T1 Thermocouple input socket

Note: The battery compartment is located on the back of the instrument under the

protective jacket. Remove the rubber protective jacket that encases the meter to access

the compartment. The tripod mount access is also on the back of the instrument above

the tilt stand.

Safety

Please read the safety information and operation instructions before operating this

instrument.

•To avoid electrical shock, do not use this instrument when voltages at the

measurement surface exceed 24V ac or 60V dc.

•To avoid electrical shock or personal injury, do not apply more than 20V ac rms,

between the thermocouples, or between any thermocouple and earth ground.

•If voltage on the measurement surface results in potentials of more than 1V,

measurement errors may occur.

•If a potential exists between the thermocouples, use electrically insulated

thermocouples

•To avoid meter damage and burn hazards, do not use this instrument to measure

temperature in a microwave oven.

•Avoid repeated sharp flexing of the thermocouple wire as this can cause

thermocouple lead breakage. To prolong lead life, avoid sharp bends in the leads,

especially near the connector.

•The meter can display temperature as high as 2501oF (1372oC), however, the

supplied thermocouple is rated for 500oF (260oC). To measure higher

temperatures, a high-temperature thermocouple (not supplied) must be used.

This symbol on the instrument indicates that the operator must refer to an

explanation in this manual.

TM200 V4.1 11/063

Operation

Connecting thermocouples

1. This meter accepts one or two thermocouples. Only type K thermocouples with spade

plugs (sub-miniature type with one spade wider than the other) may be used.

2. Plug one thermocouple into the meter's T1 input jack and optionally plug another

thermocouple into the meter’s T2 input jack.

Turn Power ON

1. Press the button to turn the meter on.

2. If a probe is not inserted to the meter, dashes “-----” will appear on the display.

Selecting oC / oF / Kelvin (oK) unit of measure

Use the oC/ oF / K button to select the desired unit of measure.

Taking Measurements

Hold the thermocouple in air or touch the tip of the thermocouple to a device under test

and read the temperature on the meter’s LCD. If the measured temperature exceeds the

meters high or low limits, ‘OL’ will appear in place of a temperature reading.

Important Note: The supplied thermocouples are rated for 500oF (260oC). To measure

higher temperatures, a high-temperature Type K thermocouple (not supplied) must be

used.

Display resolution

The meter has a 0.1oresolution on displays ranging from 0.1oto 999.9o. The resolution is

1ofor temperatures 1000oand higher.

Selecting T1, T2, and T1-T2 Displays

Use the T1, T2, T1-T2 button to select the desired display configuration

•When the meter is turned on, the T1 thermocouple reading is displayed on the

primary display and the T2 reading is displayed on the secondary (smaller display).

•First press of the button: The T1 and T2 displays switch places (the T2 reading is now

on the primary display and the T1 reading is on the secondary display)

•Second press: The differential (T1-T2) is shown on the primary display and the T1

temperature reading is shown on the secondary display.

•Third press: The differential value (T1-T2) is shown on the primary display and the T2

temperature reading is shown on the secondary display.

•Fourth press: The display configuration loops back to the start up condition (the T1

reading is displayed on the primary and the T2 reading is displayed on the secondary)

Backlight

Press the backlight button to switch on the LCD display backlight. Press the button

again to turn the backlight off. Judicious use of the backlight feature will conserve battery

power.

Data Hold

Press the HOLD button to freeze the readings in the display. The 'HOLD' icon will appear

above the temperature reading on the display. Press the HOLD button again to return to

normal operation (the 'HOLD' hold icon will disappear).

Tripod Mount

The tripod mounting connector is located on the back of the meter. Tripods are available

through Extech Instruments distributors.

TM200 V4.1 11/064

MIN / MAX /AVG Display Function

In the MIN MAX mode the meter tracks the lowest (MIN), highest (MAX), and average

(AVG) readings while displaying elapsed time.

1. Press the MIN MAX button to start the Elapsed Timer (bottom left side of LCD)

2. Begin taking measurements

3. The secondary display (lower right) will display only the primary display’s highest

reading (the MAX icon will be visible on the bottom of the LCD).

4. Press the MIN MAX button to see the MIN (minimum) reading.

5. The secondary display (lower right) will display only the primary display’s lowest

reading (the MIN icon will be visible on the bottom of the LCD).

6. Press the MIN MAX button to see the AVG (reading)

7. The secondary display (lower right) will display only the primary display’s average

reading (the AVG icon will be visible on the bottom of the LCD).

8. Press and hold the MIN MAX button for three (3) seconds to exit this mode and return

to normal operation (the MIN, MAX, and AVG display icons should switch off when

this mode is successfully exited).

9. Note that in MIN MAX mode, the T1 T2 / T1-T2 button is active allowing the user to

view the MIN/MAX/AVG of the T1, T2, or T1-T2 displays.

Auto Power OFF (Sleep Mode)

The meter will automatically turn off if no keys are pressed during any twenty (20) minute

period. To configure the Sleep Mode ON or OFF:

1. With the meter ON, press the SETUP button to enter the SETUP mode (the SETUP

display icon will appear on the LCD)

2. Repeatedly press the UP arrow button until the SLP (sleep) icon appears on the LCD

3. Press the ENTER button (on or off will appear on the LCD under the SLP icon)

4. Use the UP/DOWN arrow buttons to select ON (sleep mode on) or OFF (sleep mode

defeated)

5. Press ENTER again to save the selection

6. Press SETUP again to exit the setup mode and to return to normal operation.

Display OFFSET adjustment

Use the display OFFSET feature to compensate for thermocouple irregularities and to

better match two thermocouples. The allowable offset range is ± 9oF (±5oC).

1. With the meter ON, press the SETUP button to enter the SETUP mode (the SETUP

display icon will appear on the LCD)

2. Use the UP arrow button to select input T1 or input T2 (icons are shown on left side

of LCD)

3. Press the ENTER button; the temperature reading will appear in the primary display

area. The offset will be shown in the smaller secondary display area

4. Use the UP/DOWN arrow buttons to program an offset. The available range is ± 9oF

(±5oC)

5. Press ENTER again to save the selection

6. Press SETUP again to exit the setup mode and to return to normal operation.

Turning Power OFF

Press the button to turn power off.

TM200 V4.1 11/065

Maintenance

Battery Replacement

When the low battery symbol appears on the display, replace the 9V battery:

1. Remove the rubber protective jacket that encases the meter. If this jacket is not

removed, the battery compartment cannot be accessed.

2. Remove the rear Phillips screw that secures the battery compartment.

3. Open the compartment and replace the 9V battery.

4. Secure the meter’s battery compartment and rubber jacket before using the meter.

WARNING! To avoid electrical shock, disconnect the thermocouples before removing the

battery cover.

Cleaning

Use a damp cloth with a mild detergent to periodically wipe the meter housing and display

area. Do not use abrasives or solvents to clean the meter.

TM200 V4.1 11/066

Specifications

Measurement Range -328 to 2501°F (-200 to 1372°C)*

Max. Resolution 0.1°C/°F<999.9°, 1°C/°F>1000o

-148 to 2501°F (-100 to 1372°C) ± [0.5% of reading + 1.8oF(1°C)]Accuracy (T1&T2)

-328 to -148°F (-200 to -100°C) ± [0.5% of reading + 3.6oF(2°C)]

Temperature

Coefficient 0.1 times the applicable accuracy specifications per °C from 0°C to

18°C and 28°C to 50°C (32°F to 64°F and 82°F to 122°F)

Note: Temperature accuracy does not include the accuracy of the type K probe

Note: Temperature accuracy specifies @ 23 ± 5oC

Note: The temperature scale is based on the international temperature scale of 1990

(ITS90)

Note: Supplied thermocouples rated for 500°F (260°C) max.

General Specifications

Display Multi-function LCD with Backlight

Input Protection 60VDC; 24VAC rms

Display Update Rate 2.5 times per second

Over range indication "OL" appears on the LCD

Open input indication Dashes "-------" appears on the LCD

Low battery indication “ ” appears on the LCD

Power supply 9V alkaline battery

Auto Power OFF After 20 minutes of inactivity (programmable)

Ambient Operating conditions 4 to 122oF (0 to 50oC) / < 80% Relative Humidity

Ambient Storage conditions 14 to 122oF (-10 to 50oC) / 10 to 80% Relative Humidity

Dimensions 6.5 x 3.0 x 1.7" (165 x 76 x 43mm) without holster

Weight 7.4oz (210g) with battery

TM200 V4.1 11/067



Support line (781) 890-7440

Technical support: Extension 200; E-mail: [email protected]

Repair & Returns: Extension 210; E-mail: repair@extech.com

Product specifications subject to change without notice

For the latest version of this User Guide, Software updates, and other

up-to-the-minute product information, visit our website: www.extech.com

Extech Instruments Corporation, 285 Bear Hill Road, Waltham, MA 02451

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one

year from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to

return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781)

890-7440 ext. 210 for authorization or visit our website at www.extech.com (click on ‘Contact Extech’ and go to ‘Service

Department’ to request an RA number). A Return Authorization (RA) number must be issued before any product is returned

to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in

transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation

outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any

implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental

or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth

above is inclusive and no other warranty, whether written or oral, is expressed or implied.

Calibration and Repair Services

Extech offers complete repair and calibration services for all of the products we sell.

For periodic calibration, NIST certification or repair of this Extech product, call customer

service for details on services available. Extech recommends that calibration be performed

on an annual basis to ensure calibration integrity.

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