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Safety Precautions and Instructions

The following items should be strictly obeyed for the safe 

usage of this product, and for protecting yourself and other 

people from bodily harm and/or damage to property.

Explanation of Symbols

<Warning Symbols>

 DANGER

These entries are actions that absolutely under no 

circumstance should be taken. The taking of such an 

action may cause serious personal physical damage or 

death.

 CAUTION

These entries are actions that if taken may lead to 

physical injury or damage to persons or things.

<Picture Symbols>

Denotes an 

important warning 

or caution.

Denotes a 

forbidden action.

Denotes an action 

that should not be 

carried out.

 DANGER

To Prevent Serious Accidents

Do not disassemble, repair or modify the unit and/or accesso-

ries.
Do not use the unit in any environment that is exposed to chem-

icals and harmful gases. Doing so may cause corrosion and/or 

other danger to the unit. Also, coming in contact with hazardous 

substances may cause bodily harm to the user or people nearby.
This product is not water resistant. If water or a foreign object 

enters the case, immediately remove batteries and stop using it.

Do not touch the unit or AC adaptor during thunder and light-

ning, as this may cause electrocution.

Do not handle the unit, remove batteries or cables with wet 

hands.
This product has been designed for private and/or industrial use 

only. It should not be used in situations where strict safety precau-

tions are necessary such as with medical equipment, or in systems 

directly or indirectly connected with human life or well-being.

Do not drop or expose the unit to a strong impact.

Do not cut or process the cords for the communication cables. 

Also, do not twist, pull on or swing any of the cords.
To prevent damage to the unit from static electricity, remove static 

electricity from your body by touching metal around you (such as 

a door knob and window frame) before touching the unit.
Place and store the unit and accessories out of the reach of 

children.

We are not responsible for any damage, malfunction or trouble, 

whether direct or indirect, caused by the use of our product.
Do not use any battery, sensor, or cable other than those speci-

fied by T&D Corporation.

Do not put anything on top of the cable or the unit. This may 

cause overheating.
Do not disconnect the USB cable during USB communication. 

Doing so may cause adverse effects to the unit and/or PC.

Make sure that sensor and cable plugs are all inserted fully, so 

as not to cause an improper connection. Also, when unplugging 

the cable from the unit, do not pull the cord, but hold the con-

nector to disconnect.

If the unit produces heat, emits smoke or a strange smell, or 

makes unusual noise, immediately remove the batteries and 

stop using it. Also, unplug the unit from the PC.

If the unit is not to be used for a long period of time, remove 

batteries. Leaving batteries inside the unit may cause battery 

leakage and malfunction. Install new batteries when starting or 

re-starting to use a unit.
For TR75A: Ch.1 and Ch.2 terminals are NOT electrically isolated 

from each other. Do not attach non-isolated thermocouple 

sensors to objects connected to a live voltage. This may cause a 

short circuit or an electrical shock.

 CAUTION

Do not place or store in the following areas:

 

» Areas exposed to direct sunlight

 

»

Areas subject to direct flames or heaters, as well as areas in which 

hot air accumulates and creates extremely high temperatures

 

» Areas exposed to static electricity

 

»

Areas exposed to strong magnetic fields

 

» Areas exposed to water leakage

 

» Areas subject to condensation or wet areas

 

» Areas exposed to excessive vibration

 

» Areas exposed to excessive smoke, dust or dirt.

 CAUTION

Precautions for Battery

 

»

There is a risk of fire or explosion if battery is replaced by an incor

-

rect type. Use and replace only with correct size and type (AA alka-

line) of battery. 

 

» Do not disassemble, modify, mechanically crush or cut the battery, as 

it may cause battery leakage, overheating, explosion or fire.

 

»

Do not dispose of a battery into fire or a hot oven as this can result 

in an explosion.

 

» Do not leave a battery in an extremely high temperature surround-

ing environment or subjected to extremely low air pressure that can 

result in an explosion or the leakage of flammable liquid or gas.

 CAUTION

Other Precautions

 

»

Use the unit in the specified operating environment. Do not use it 

for any purpose other than for which it was designed.

 

» Condensation may occur inside the case when a unit is moved from 

one environment to another where there is a great difference in 

temperature.

 

» Do not use the unit in wet areas or places exposed to water such as 

bathroom.

 

» When connecting the unit to your PC, make sure to follow all warn-

ings and directions from your computer manufacturer.

 

» We shall not guarantee the unit's operation if it has been connected 

to a PC using a USB hub or a USB extension cable.

 

» Do not insert any foreign objects into any of the units' jacks.

 

» If the unit gets dirty, wipe it with a clean cloth.

 

» Make sure to remove dust and dirt from plugs of any cables.

 

»

Battery terminals may provide insufficient contact due to age or 

vibration. This may lead to data loss.

 

»

Please note that this document has been written based on the pre-

supposition that details about contracts with an Internet provider, 

specific network environments and the set-up of any other neces

-

sary equipment to enable network connection has already been 

taken care of by the User and that connection has been confirmed as 

workable. T&D Corporation shall not be responsible for any damages 

which a contractor, a user or a third party may suffer, whether direct 

or indirect, due to the inability to communicate or use communica-

tion devices.

 

» Please be careful not to let a third party know of your registration 

code. The registration code cannot be reissued or changed.

 CAUTION

Notices about Sensors

 

»

Do not connect any sensor to the unit other than those specified by 

T&D Corporation.

 

» Make sure to use sensors within the measurement range indicated 

in the specifications for that sensor.

 

» Do not connect the sensor to any data logger other than those speci-

fied by T&D Corporation.

 

» Do not expose the sensor to a strong impact. This may adversely 

affect measurement accuracy and cause damage or malfunction.

 

» When the sensor is not to be used for a long period of time, please 

store it at normal temperature and humidity.

 

» The included sensor is not water resistant. If the sensor gets wet, im-

mediately remove the sensor from the unit and wipe it with a clean 

cloth as soon as possible. Then allow the sensor to dry in normal 

room temperature before using it again.

 

» Do not use the sensor on the human body.

Temperature-Humidity Sensor

 

» If extremely severe temperature changes occur, it may result in large 

errors in humidity measurement. Once the sensor's temperature 

becomes stable, the measurements will return to normal.

 

» The temperature-humidity sensors will with normal use experience 

losses in precision and sensitivity over time due to degradation.  If 

the sensor is being used in an unsuitable environment (smoky or 

dusty places) it may be necessary to change the sensor sooner.

 

» When using the sensor in an environment where the humidity is 

under 

30 %RH, the measurements may sometimes fluctuate. This is 

not abnormal.

 

» Do not expose to condensation, dampness, corrosive gases, or 

organic solvents.

Thermocouple Sensors

 

» We do not handle the sale of Thermocouple sensors. Please prepare 

a commercially available sensor.

Package Contents

TR71A

Temperature 2ch

Data Logger

Temperature Sensor

TR-0106 x 2

AA Alkaline Battery 

(LR6) x 2

USB Mini-B Cable 

(US-15C)

Manual Set 

(Warranty Included)

Registration 

Code Label

TR72A

Temperature 1ch, Humidity 1ch

Data Logger

Temperature-Humidity 

Sensor THA-3001

AA Alkaline Battery 

(LR6) x 2

USB Mini-B Cable 

(US-15C)

Manual Set 

(Warranty Included)

Registration 

Code Label

TR72A-S

Temperature 1ch, Humidity 1ch

 (High-Precision Type)

Data Logger

High Precision 

Temperature-Humidity 

Sensor SHA-3151

AA Alkaline Battery 

(LR6) x 2

USB Mini-B Cable 

(US-15C)

Manual Set 

(Warranty Included)

Registration 

Code Label

TR75A 

Thermocouple (K, J, T, E, S, R) Temperature 2ch

Data Logger

AA Alkaline Battery

(LR6) x 2

USB Mini-B Cable 

(US-15C)

Manual Set 

(Warranty Included)

Registration Code 

Label

Getting Logger Ready for Installation

Battery Installation & Sensor Connection

Battery

Make sure to use new batteries 

(including for replacement) and 

insert in the correct direction.

TR71A

TR72A / TR72A-S

About TR71A Internal Sensor

Channel 1 has an internal temperature sensor. When an external sensor is not connected, the 

internal sensor will be used.

About TR75A Input Terminal

When connecting thermocouple wires to the input terminal, make sure that the positive and 

negative connections are in the proper order. If the polarity is incorrect, changes in temperature 

will be reversed (when the real temperature increases, the measured temperature will decrease).

Wiring Connections

Connect and disconnect the thermocouple wire from the hole 

while pressing the input terminal button with a screwdriver or 

other such tool. 

Do not try to pull out the wire without pressing the button.

Compatible Wires

Single wire:   0.32 to   0.65   (AWG 28-22)

Twisted wire: 0.08 to 0.32 

  (AWG 28-22)

Diameter: 0.12   or more

Strip length: 9 to 10   

Strip

Button

Using GND

If measurements are unstable while using external power (USB or PoE), connect to the GND 

terminal.

 

»

See the User's Manual for how to set and check thermocouple sensor type for TR75A.

TR71A

TR72A 

TR72A-S

TR75A

Operation Buttons

Battery Cover

USB Port

Sensor Jack

Channel 1

Sensor Jack

Channel 2

(TR71A only)

Power Button

Thermocouple

Input Terminal

Part Names

The Introductory Manual also explains operations using the operation buttons.

Thermo Recorder TR7 Series

  TR71A/TR72A/TR72A-S/TR75A

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