DIGITAL THERMOMETER MANUAL

TC-400A

TC-400A DIGITAL THERMOMETER
Type KWARNING

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

Customer Service

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

Address:
Contact :E-mail :Web:

ONOperation· 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 temperaturechange to the instrument.
· Do not immerse the instrument in water. If it is immersed in water
accidentally, immediately pull it out and then check and ensure that
there is no water penetration.
Thermocouple Probe

OFFBurn Out( ---- )HOLD KeyHOLD

Unit Select Key· Do not drop the probe or strike into hard surface.
· Do not bend the probe connector by applying strong force from theupper and lower side.
· Do not measure beyond temperature limits of the thermocouple
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 temperaturesdue to poor thermal conductivity.
· When measuring surface temperature, make sure that thethermocouple probe is in contact with the surface perpendicularly for
accurate measurement.

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

Functions
ON / OFF KeyATTENTION

LINE SEIKI CO., LTD.

°C°F

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 ispressed.
· Turning ON the instrument while pressing the HOLD key disables the AutoPower Off function and the " AUTO OFF " indicator will disappear· In addition, Auto-Power Off is disabled even during recording.
· In any case, it is advisable to manually turning OFF the power after
finishing the measurement.
When the probe is not properly connected to the instrument, or the probe
itself is broken, the unit will be in Burn Out state and will have a burn out
display (----).
· If the instrument is in Burn Out state, just connect the probe, then turn thepower OFF then ON to return the instrument to the normal operatingcondition.
To hold the measured value temporarily, press this key once.
indicator
will appear on the display. And press again to unhold the measured value andreturns the instrument to the orginal measuring state.

To convert the measured data into °C or °F unit , press this key. Unit °C or °F
will be shown on the display.
· Convertion can take place during Hold, Recording, Relative and Data
Recall function.

Relative Function Key

Pressing this key will display the difference (relative value) between themeasured value (D1) just before the key is pressed (reference value) and thesucceeding measured value (Dx).
indicator appears on the display.

REL

Relative Display = DX - D1
Pressing this again returns the instrument to normal measured value display.

Pressing this key will start the instrument to record the Max / Min value until
such time that it is pressed again.
indicator appears while recording.
MAX Memory

MAX display

Input
MIN Memory

I. Panel System

MIN display

MAX/MIN Record Key

REC indicator lights up
Press(Start)

RECRECMAX - MINREC

MAX - MIN

Press(Stop)

MAX - MIN

Input connectorMIN data indicator

Hold status indicator

MAX data indicator

Auto-Power Off indicator
Low Battery indicator

Thermocouple type indicator
Data polarity indicator

Unit display
Relative function indicator

Recording indicator
Data Display
Hold key
Power-ON/OFF key
Record key· Recorded Max/Min value is stored in the internal memory after therecording (The data can be read later).
However, if Recording is started again, the previously stored Max/Min data
will be replaced with new recorded values.
· When this key is pressed during Relative function, the Max/Min values
recorded are the actual measured values (Dx) instead of relative values.
· Even if the power is turned OFF, the Max/Min values stored will not bedeleted and can still be read after the power is turned ON.
· During Recording, Auto-Power Off function is disabled and enabled again
after the Recording.

Stored data indicator

Memory In Function

AUTO POWER OFFONOFFREC

MAX-MIN

TC-400AHOLD

DATACALL°C°F

RELLINE SEIKI

Unit selection key

HOLD

Relative display
function key
Data recall key

RELRECMAX - MIN

There are two ways to store measured value on memory.
· First, put the measurement on HOLD then press the Recording key.
Simultaneously, the HOLD state is released and return to measuring mode.
· Second, is by shifting the measurement mode to Relative function.
The reference value D1 will be stored in the memory.
(This procedure can not be made while in Relative function.)· The data stored can only be changed by the above two ways.
· Also, the data stored will not be erased even the instrument is turned OFF.

Press this key to recall the recorded and stored values. The manner ofrotation is shown below.

Data Recall KeyTC-400ADATACALL

Measured value

MAX value

MIN value

Memory value· The MAX and MIN value are the data recorded during recording.
· The MEM value is the data stored during the Memory In Function.
· The DATA CALL function can also be done during Recording and Relativefunction.
· Indicators "", "" and "" will appear on the display based onthe recalled value shown on display.

TC-400A

DIGITAL THERMOMETER MANUALII. 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.
2.) 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 modewith the following default items and features.
> Set at measuring mode.
> Unit set at °C.
> 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 (Please see Function list on how to disable).
· If the burnout display (----) is shown, the probe is not inserted properly.
In this case, check the probe side.
3.) Attach the sensor part of the thermocouple probe to the object you wantto measure.
· Wait until the measured value becomes stable.
· For long time measurement, use Recording function to avoid thesudden turned Off of the instrument due to Auto-Power Off function.
4.) Turn OFF the instrument after using.
· After every use, always turn OFF the instrument.

V. General SpecificationsMain Unit
MODEL

TC-400A

NO. OF INPUT

1SENSOR TYPE

Thermocouple Probe Type K

MEASURING
RANGE-160°C - +1,372°C (-256°F - +2,502°F)

RESOLUTION

199.9°C (391.8°F) and below : 0.1°C (0.2°F)
200°C (392°F) and above : 1°C (2°F)

ACCURACY

at 25°C(77°F) ±5°C(9°F)

TEMPERATURE
COEFFICIENT±(0.015% of reading + 0.06°C) / °C±(0.015% of reading + 0.108°F) / °F

SAMPLING TIME

Approx. 0.5 sec.

LINEARIZE
METHOD

Digital Linearize

FUNCTIONS°C/°F, Auto-Power Off, Data Hold, Data Record(Max/Min/Memory), Relative Measurement----ATTENTION
The keys of this instrument can be switched with only a slight pressure.
Make sure that the instrument is not mistakenly set to a state other thanthat intended.

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.
3 Upper-CoverAB

2 Lower-Cover
1 Screw

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 .

0 - 199.9°C (32°F - 391.8°F) : ±(0.1% of reading + 0.7°C(1.3°F))-0.1°C(31.8°F) or less : ±(0.2% of reading + 1°C(1.8°F))
200°C(392°F) above : ±(0.2% of reading + 1°C(1.8°F))

Thermocouple TypeBurn-out
Low Battery
Auto-Power Off
Data Hold
Relative Measurement
Max / Min Data Recording
Max / Min Data Memory
Recorded Memory Data

OPERATING
TEMP./HUMIDITY

0 - 50°C ( 32 - 122°F)
0 - 90%RH (Non-condensing)

POWER SUPPLY

006P (9V) Battery

BATTERY LIFE

Approx. 500 Hours (Manganese Battery use)

SIZE / WEIGHT

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

SENSORCONNECTORThermocouple Connector

COMPLIANCE

CE and RoHS

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 May. 23, 2017. 4TC018C*Subject to change without prior notice.
All Rights Reserved,Copyright © 2017,LINE SEIKI CO.,LTD.