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Part Names and LCD Display

 

 CO2 Sensor Area (Internal)
 LCD Display
 Infrared Communication Port 
 Operation Buttons

    

 Button

    

 Button

    

 Button

 Battery Cover
 Temperature and Humidity Sensor Jack
 AC Adaptor Jack
 USB Communication Cable Jack
 Serial Communication Cable Jack (RS-232C)
 External Alarm Terminal (EXT ALM)
 

 Switch 

[REC] Mark

Shows recording status
ON: Recording in progress
BLINKING: Waiting for programmed start
OFF: Recording stopped

Data Scale

At the beginning of every 2,000 readings the scale will be marked from left to right. 

Logging capacity is 8,000 readings.

[COM] Mark

Shows communication status but not displayed normally.
ON: The unit is connected to a PC with a USB cable.
RAPID BLINKING: The unit is in communication with the computer via USB or 

infrared communication.

Recording 

Mode

Recording mode settings can be made by using the supplied software.

Endless:     

Upon reaching the logging capacity of 8,000 readings, the oldest data will be 

overwritten and recording will continue.

One Time:

Upon reaching the logging capacity of 8,000 readings, recording will automatically 

stop and in the LCD the current measurement and the word “FULL” will alternately 

appear.

Battery Mark

Shows source of power and voltage level
ON: Running on external power source
BLINKING: Running on battery power
OFF: No battery

Current 

Temperature 

and Humidity 

Readings Area

Shows the current readings for temperature ( °C or °F) and humidity (%RH). 

Pressing the 

 button will change the measurement item to be displayed. 

By using the supplied software, the unit of temperature can be changed. is also 

used to display messages.

Current CO2 

Readings Area

Shows the current readings for CO2 concentration (ppm).  is also used to display 

messages.

Button Operations

Upon the start of recording, all previously recorded data in the TR-76Ui will be deleted.

If "Button Lock" has been set to ON in the CO2 Recorder for Windows, the operational 

buttons will not be active.

 Button: Starting and Stopping Recording

Starting Recording

Press the 

 button for about two seconds until the [REC] 

mark appears on the display.

 

It is possible to start recording even while waiting for a programmed 

recording to start.

Stopping Recording

Press the 

 button for about two seconds until the [REC] 

mark disappears from the display.

 Button: Changing the LCD Display Pattern

It is possible to change the current readings display for temperature and humidity 
(upper row). CO2 concentration (lower row) is always displayed.

11 

With each pressing of the 

 button the item on the display will change.

Temperature and Humidity:

The display will alternate every one second.

Temperature only
Humidity only

21 

When the desired display pattern appears, stop pressing the button.

 Button: Checking Recording Interval

It is possible to check the recording interval during recording or while waiting for 
a programmed recording to start.

11 

By pressing the 

 button 

for about two seconds, the currently 
set recording interval will appear on 
the LCD display.

21 

If no operation is carried out after the 
recording interval has been displayed, 
the current measurement readings 
will return to the LCD display.

10 minutes

10 seconds

 Button: Changing the Recording Interval Setting

Recording interval settings cannot be changed while a recording session is in 
progress.

11 

Stop recording.

21 

Press the 

 button for about two seconds to display the currently set 

recording interval on the LCD screen.

31 

With each pressing of the 

 button the recording interval time will 

change; stop pressing the button when the desired interval appears.

41 

Restart the recording session.

Package Contents

TR-76Ui

TR-76Ui-S

 

CO2 Recorder TR-76Ui

 

Temperature and Humidity Sensor 

(THA-3001) 

 

AC Adaptor  (AD-06A1 or AD-06C1)  

 

USB Communication Cable 

(US-15C) 

 

Software CD-ROM

 

AA Alkaline battery x 4

 

Getting Started Guide (Warranty 

Included) 

 

Please Read First

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CO2 Recorder TR-76Ui

 

High Precision Temperature-

Humidity Sensor (SHA-3151) 

 

AC Adaptor  (AD-06A1 or AD-06C1) 

 

USB Communication Cable 

(US-15C)

 

Software CD-ROM

 

AA Alkaline battery x 4

 

Getting Started Guide (Warranty 

Included)

 

Please Read First

© Copyright    T&D Corporation. All rights reserved.  2017. 07  16504640016  (7th Edition)

http://www.tandd.com

  Notes about Operation

This product has been designed for use in normal living conditions, and is not suited 

for controlled environments such as a CO2 incubator. When measuring outdoors, 

avoid exposure to sunlight, dust, rain, or wind. Also make sure to use in the operating 

environment indicated in the specifications.

This product cannot measure CO or O2. Do not use the unit for purposes such as 

avoiding O2 deficiency, CO intoxication or any other health related purpose.

For one to two weeks after installation of the TR-76Ui, CO2 concentration measurements 

may fluctuate suddenly. This is due to the normal operation of Auto Calibration and is not 

a malfunction of the unit.
Do not use or store the unit in areas exposed to direct sunlight and abrupt changes in 

temperature.

Do not allow the unit to become wet. Do not use or store the unit in places where 

condensation occurs.

To help prevent deterioration of the unit, do not use or store the unit in areas exposed to 

cigarette smoke, corrosive, explosive or organic gases or dust in the air.

Do not expose the unit to a strong impact. This will adversely affect measurement 

accuracy and may cause the case to break resulting in bodily injury.

The measurement accuracy of the CO2 sensor can not be guaranteed for CO2 

concentrations of 5,000ppm or more.
The Warning Monitoring function provided in the TR-76Ui is for informational purposes 

only. By clicking “I Agree” button you confirm your understanding that it is not to be relied 

upon for human health or safety.

Messages and Display on the LCD

Settings Messages

Button Lock

When "Button Lock" has been set to ON in 

CO2 Recorder for Windows, operational buttons are not active.

Memory Full

When recording mode has been set to “One Time” and the unit 

reaches its logging capacity of 8,000 readings, the measurement 

and the message [FULL] will alternately appear in the LCD.

Stop recording and download the recorded data before re-starting 

recording.

 

When this happens, measurement will continue so battery power will be consumed.

Notes on Special Functions

Getting Started Guide

Setting up the TR-76Ui

Make sure to install the provided software before connecting the TR-76Ui to your PC.

Connect the Temperature and Humidity Sensor

Turn On the Power

AC Adaptor

When measuring and recording over long periods of time, 
please use a supplied AC adaptor.

Four AA  Alkaline Batteries

Keeping batteries in the unit allows a backup source of 
power * for when and if electrical power is cut from the 
AC adaptor. If running on only batteries, the estimated 
battery life is about two days.

 

*

Leaving alkaline batteries in the unit for a long period of time may cause battery leakage and 
corrosion. When using as a backup source, we recommend that you change the batteries every few 
years.

Turn On the 

 Switch

After setting up the power supply, turn on the 

 

Switch.

 

"ON" position

Warm-up Time for CO2 Sensor

After switching on the unit, it will take about one minute to display the normal 
CO2 concentration.

Install the Batteries

If battery power is lost, all recorded data stored in the unit will be erased. Do not leave the 

unit without batteries.

11 

Remove the battery cover from the back of 
the unit.

 While pressing down on the triangular mark, 

slide the cover to the bottom of the unit.

 Lift off the cover.

21 

Insert the batteries.

 

Make sure to use four new batteries of the same 

kind.

 

Make sure not to m / -.

 

Do not insert or change batteries with wet hands.

 

Be sure to completely close the cover.

Interpreting the Battery Mark

Checking the Power Supply Condition

Whether the battery mark is "blinking" or "on" indicates the source of power.

BLINKING (Running on battery):

The battery mark will blink on the LCD display when measuring and 

recording by battery power.

 

Mark blinks when running on bat-

tery power.

ON (Running on external power):

The battery mark will be on when measuring and recording by AC adaptor 

power.

Checking the Battery Level

The battery level will be shown in three stages as below.

 

Battery Power - OK

 

 

Battery Power - Getting Low

Please change the batteries as soon as possible.

 

Battery Power - Too Low

Battery power is too low to carry out measurement 

and recording of CO2 concentration.

 

When running on batteries only, it will take about 24 hours to go from Stage   to   and 

another 24 hours from Stage   to  .

 Sleep Mode (stopping measurement and recording)

After Stage  , if the battery is not changed but it remains in use, 

the unit will enter sleep mode and stop measurement and 

recording in order to protect recorded data until this point.

 

To continue recording, it is necessary to change the batteries 

before the unit enters sleep mode.

 

If the unit is already in sleep mode, download the recorded data 

into the PC before re-starting recording.

 Erasing recorded data

If the battery is further left unchanged, the display will 

automatically shut off and all previously recorded data will be lost.

 

Recording settings will remain. (See STEP 4 in the back side of this 

page for details.)

Removing the Batteries during Recording

11 

If the batteries are removed when running on battery 
power only, the unit will start a sixty-second 
countdown.

21 

To continue recording, before the countdown comes 
to an end, insert new batteries or connect the AC 
adaptor to supply power.

Countdown

31 

If power is not supplied within 60 seconds, the unit 
will enter sleep mode.

Turning Off the 

 Switch

During recording or when the "Button Lock" is set to ON in the CO2 Recorder for Windows, 

the power cannot be turned off even by pressing the 

 Switch.

11 

Stop recording.

21 

Turn off the 

 Switch.

Standby Power

If the TR-76Ui is connected to an AC adaptor, standby power will be supplied 
even after turning off the 

 switch, allowing the CO2 sensor to continue 

operation.

Getting Ready for Using Infrared Communication

In order to download recorded data from the TR-76Ui via infrared 

communication, it is necessary to purchase the dedicated Data Collector 

TR-57DCi (sold separately).

 

Go to [   Operation Guide] to see how to download data via data collector.

Getting Ready for Using the Warning Monitoring Function

It is possible to connect an external device such as siren or lamp to the TR-76Ui. 

Please make sure to check specification details of the external alarm terminal 

before purchasing or getting an external device ready for connection.

Upper and Lower Limit Settings

To use the warning monitoring function, go to the [Start Recording] tab in the 
CO2 Recorder for Windows and make settings for Upper and Lower Limits and 
Judgement Time. When the measurement exceeds one of the set upper and 
lower limits, the TR-76Ui will turn ON the external alarm terminal. Upon a 

warning, the measurement value on the display will also flash.

About the External Alarm Terminal (EXT ALM)

Enabling 

Warnings

Warning Output 

(Enable / Disable)

Internal Pull-up: 3V 100kΩ

Maximum Input Voltage: 30V

GND

Warning Output
(OUT)

Output Terminal 

(Warning Output)

Open Drain Output
Voltage when OFF: DC less than 30V
Current when ON: less than 0.1A

Resistance when ON: 15Ω

GND

The connection between   and   decides whether Warning 
Output is enabled or disabled.
If a warning condition occurs while Warning Output is 
enabled, a connection between   and   will be established 
and a warning will be output.

Enabled

Disabled

About the Compatible Connector

The JST Connector PAP-04V-S is compatible with the external alarm terminal. 
For questions concerning sales of the connector, please directly contact JST 
Mfg. Co., Ltd. (http://www.jst-mfg.com/)

When [

] appears in the following:

Temperature and Humidity Display Area

This appears when the temperature-humidity sensor is not 

connected to the TR-76Ui, the connection is loose, the wire is 

broken, or when power has just been turned ON. If after 

re-connecting the sensor, measurements can still not be displayed, 

it is very possible that the sensor or the logger is defective or has 

been damaged.

CO2 Concentration Display Area

This appears when power has just been turned ON. If measurements 

don't appear in the display after waiting for a considerable time, 

there is a possibility that the sensor is defective or has been 

damaged. Also, the CO2 sensor will not work if battery power is low.

 

Measurement and recording will continue in this situation, so battery power will be 

consumed.

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