DIGITAL THERMOMETER MANUAL

TC-250

TC-250WARNING

Customer Service

Type K

Address:
Contact :E-mail :Web:

INSTRUCTION MANUAL
Thank you for purchasing our Digital Thermometer.
Please read this instruction manual carefully before
using to ensure the correct usage of this device.
Please keep this instruction manual for futurereference.

Misuse of this device may lead to injury to theuser or damage to the device.

LINE SEIKI CO., LTD.
37-7 Chuo-cho, 2-Chome
Meguro-ku, Tokyo 152-0001 Japan
Tel: +81-3-37165151
Fax: +81-3-37104552
webtrade@line.co.jp
http://www.lineseiki.com

I. Panel System
Input connector

Hold status indicator

Auto-Power Off indicator
Low Battery indicator

Thermocouple type indicator
Data polarity indicator

Unit display

Data Display

Safety Precautions
For safe usage of this device, please observe all statements regarding
precautions and warnings in this instruction manual.

AUTO POWER OFF

Power-ON/OFF key

ATTENTION

ONOFF

TC-250HOLD

Hold key

LINE SEIKI

Operation· Do not use this device near machines that emits strong
electromagnetic field or object that store static electricity.
· Do not drop or subject this instrument into strong impact.
· Do not attempt to disassemble or modify this instrument.
· To ensure stable measurement, do not apply rapid
temperature change to the instrument.
· Do not immerse the instrument in water. If it is immersed inwater accidentally, immediately pull it out and then check andensure that there is no water penetration.

Key Operation
ON / OFF Key
ONOFFHOLD Key

Thermocouple Probe· Do not drop the probe or strike into hard surface.
· Do not bend the probe connector by applying strong force
from the upper and lower side.
· Do not measure beyond temperature limits of thethermocouple probe being used.
· Do not use the thermocouple probe in places where electric
shock isis suspected.
· Avoid using the thermocouple probe in measuring materials
which can cause corrosion.
· Take a long time when measuring non-metallic surface
temperatures due to poor thermal conductivity.
· When measuring surface temperature, make sure that thethermocouple probe is in contact with the surface
perpendicularly for accurate measurement.

HOLD· Pressing this key will turn ON and OFF the instrument· Since this instrument has the Auto-Power Off function,
the power automatically turns OFF in approximately 10
minutes after the last key pressed.
· In any case, it is advisable to manually turning OFF thepower after each measurement· To hold the measured value temporarily, press this key
once· Press again to unhold the measured value and returns
the instrument to the measuring state.

Display
Burn Out( ---- )· When the probe is not properly connected to theinstrument, or the probe itself is broken, the unit will bein Burn Out state and Burn Out display is shown.
· If the instrument is in Burn Out state, just connect theprobe and turn the Power Off then On to return theinstrument to normal operation.
· If the battery voltage decreases below the rated to thevalue, Low Battery indicator will appear.
· If this indicator is shown, Auto Power Off is enabled
otherwise it is disabled.
· If measured value is put on hold ,this indicator isdisplayed.

TC-250

DIGITAL THERMOMETER MANUAL
V. General Specifications

II. Operation Procedure1.) Connect the probe to the instrument through the Input Connector· Probe can be checked if properly connected with the Burn Out featureof this instrument.

Main UnitMODELTC-2502.) Turn the power ON.
· Upon turning ON the instrument, all the display and indicators will lightup for several seconds. This is to check if all segments of the display
are working properly. Afterwards, it will shift to its normal operating
mode with the following default items and features.
> Set at measuring mode.
> Thermocouple type indicator is displayed.
> Auto-Power Off indicator is displayed.
> Other indicators are not displayed.
· Auto-Power Off function is automatically enabled upon turning ON theinstrument . To disable Auto -Power Off, turn ON the device whilepressing the HOLD key· If the burnout display (----) is shown, the probe is not inserted properly.
In this case, check the probe side.

NO. OF INPUT

1

SENSOR TYPE

Thermocouple Probe Type K

MEASURING
RANGE-160°C - +1,372°C

RESOLUTION

199.9°C and below: 0.1°C
200°C and above: 1°C

3.) Attach the sensor part of the thermocouple probe to the object you wantto measure.
· Wait until the measured value becomes stable.
4.) Turn OFF the instrument after using.
· After every use, always turn OFF the instrument.

(at 25°C ±5°C)

0 - 199.9°C: ±0.1% of reading + 0.7°C-0.1°C or less: ±0.2% of reading + 1°C
200°C above:±0.2% of reading + 1°C

TEMPERATURE
COEFFICIENT±0.015% of reading + 0.06°C/ °C

SAMPLING TIME

Approx. 1.2 sec.

LINEARIZE
METHOD

Digital Linearize

FUNCTIONS

Auto-Power Off, Data Hold,----

Thermocouple TypeBurn-out
Low Battery
Auto-Power Off
Data Hold°C

Unit Measurement

DISPLAY

III. Battery Replacement
If the "" indicator is displayed, it indicates a Low Battery condition andthe battery needs to be replaced. Please follow carefully the procedure
below for replacing battery.

OPERATING
TEMP./HUMIDITY

0 - 50°C
0 - 90%RH at 0 - 35°C

POWER SUPPLY

006P (9V) Battery

BATTERY LIFE

Approx. 500 Hours

2 Lower-Cover

SIZE / WEIGHT

Approx. 166(H) x 68(W) x 35(D)mm
Approx. 200g

1 Screw

SENSORCONNECTOR

Thermocouple Connector

COMPLIANCE

CE and RoHS

3 Upper-CoverAB

ACCURACY

1. Unscrew Screw 1 , and then open the unit by pulling the Lower-Cover 2
in arrow A direction.
2. Remove the battery on the printed circuit board.
3. Replace the battery with new one. Make sure the battery is properly
connected to the terminals.
4. Place back the Lower-Cover 2 by inserting its front end first on arrow B
direction and then push it closely to the Upper-Cover 3 until it snaps.
5. Make sure the rubber gasket is properly located when the unit is closed.
6. Lock the unit with the Screw 1 .

VI. Accessories (Sold Separately)- Carrying Case (HM-818)- Thermocouple Probes (See catalog for probes)· Use only suitable battery written on the specification.
· Do not dispose battery on household waste, fire or water.
· Remove the battery when the device will not be used for long period oftime.
· The instrument cannot measure accurately after low battery indicator isdisplayed. Please replace the battery immediately.

IV. Storage and Cleaning· Storage Temperature: -10 - +50°C (14 - +122°F)· Storage Humidity: Less than 85% RH.
· When storing the instrument, avoid the following locations where:1. Humidity is high.
2. The instrument is exposed to direct sunlight.
3. The instrument is exposed to a extreme temperature.
4. Large vibration exist.
5. Dust, salt, and/or corrosive gas exist.
· Keep the instrument clean at all times.
· Wipe off stains using a moist and soft cloth. Do not use any cleaning
agents or solvents.

This manual was last revised October 4, 2011. 4TC013E*Subject to change without prior notice.
All Rights Reserved,Copyright © 2011,LINE SEIKI CO.,LTD.