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Thank you for purchasing our product.

To ensure safe and proper operation, please read this guide thor-

oughly before use.

Overview

The RTR501B, RTR502B, RTR503B and RTR507B are wireless 

data loggers designed to measure and record temperature 

and humidity.

Recorded data is then automatically collected by the Base Unit via 

wireless communication and downloaded for archive and analysis.

RTR501B / 502B / 503B / 507B require a Base Unit to carry out wire-

less communication.  

(Compatible Base Units: RTR500BC, RTR500BW, RTR500BM, RTR-

500DC, RTR-500MBS-A, RTR-500, RTR-500NW/AW)

For the operation and configuration of the Base Unit, refer to 

the instruction manual attached to the Base Unit or the RTR500B 

Series Help available on T&D Website.

Wireless Thermo Recorder RTR501B / 502B / 503B / 507B is referred 

to as the “(data) logger” or “device” in this manual.

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Package Contents

RTR501B

Internal Temp 

Sensor

RTR502B

Temp Sensor

TR-5106 

(Included)

RTR503B

Temp-Humidity 

Sensor

TR-3310 (Included)

RTR507B

High Precision 

Temp-Humidity Sensor

SHB -3101 (Included)

Common Accessories

•  Lithium Battery LS14250 (or Large Capacity Battery Kit RTR-500B1 for L type model)
•  Strap (Not included with L type model)
•  Manual Set (Warranty Included)

Part Names

Make sure that the sensor is completely 

inserted until you hear a “click” sound.

Sensor 

Jack

LCD Display

Antenna

Optical 

Communication 

Area

<Side>

(L type)

<Side>

<Front>

<Back>

Battery Installation

Install the battery as shown below. Recording will start automatically 

with the default or previous settings.

Battery 

Cover

Rubber 

Packing

Screw

Lithium Battery

Default Settings

Recording Mode

Endless

Recording Interval 10 minutes

Recording Start 

Method

Immediate Start

• Make sure to use the proper type and 

size screwdriver. (Phillips head #1 

screwdriver is recommended.)

• Insert the supplied battery with the 

tube attached. When using a CR2 lithi-

um battery, the tube is not necessary.

• Before closing the cover, check the rub-

ber packing for dust or scratches, as 

they can reduce the water resistance of 

the rubber.

• Be sure to completely close the cover. 

Make sure not to over tighten the 

screws.

• Appropriate Tightening Torque: 

20N·cm to 30N·cm (2Kgf·cm to 3Kgf·cm)

Battery Replacement

When it is time for the battery to be 

replaced, a battery warning mark will ap-

pear. Please change the battery as soon 

as possible if this mark appears.
If you continue to use the logger without changing the battery, the 

current temperature and [bAtt] will be displayed alternately and wireless 

communication will stop. (Recording will continue.)

Alternating 

Display

• If the battery is further left unchanged, the display will automatically shut 

off and all previously recorded data will be lost.

• Although the logger continues to work for a period after the battery has 

been removed, leaving the device without a battery until the LCD display 

goes blank will cause all recorded data to be lost.

• After the battery installation, the battery warning mark may not disappear 

from the logger’s LCD for 10 to 60 minutes. This is due to the characteristic 

of the lithium battery and is not a malfunction of the logger or the battery.

Remote Unit Registration and Settings

Via Software and Optical Communication

Connect the Base Unit to a PC with a USB cable, and place the data log-

ger face down to align the communication areas as shown below.

RTR500BW, 

RTR-500NW/AW

RTR500BM, 

RTR-500MBS-A

RTR500BC, 

RTR-500

RTR-500DC

Via Mobile App and Bluetooth

®

 Communication

When the Base Unit is a RTR500BW or RTR500BM, it is possible to make 

Base Unit and Remote Unit settings from nearby mobile devices using 

Bluetooth.

Wireless Thermo Recorder

RTR501B / 502B / 503B / 507B

User’s Manual

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