Omega RDXL4SD User Manual

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User’s Guide

RDXL4SD

4-Channel

Datalogger Thermometer

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MADE IN TAIWAN

Extended Warranty

Program

SM

Servicing North America:

USA: OMEGA Engineering, Inc., One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford, CT 06907-0047 USA

Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec), H7L 5A1 Canada
Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA

®

Customer Service: 1-800-622-2378/1-800-622-BEST

®

Engineering Service: 1-800-872-9436/1-800-USA-WHEN

®

Mexico/ En Espan˜ol: 001 [phone] FAX: [phone]
Latin America [e-mail] e-mail: [e-mail]

Servicing Europe:

Benelux: Managed by the United Kingdom Office

Toll-Free: 0800 099 3344 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Czech Republic: Frystatska 184

733 01 Karviná, Czech Republic
Toll-Free: 0800-1-66342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

France: Managed by the United Kingdom Office

Toll-Free: 0800 466 342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26

D-75392 Deckenpfronn, Germany
Toll-Free: 0800 6397678 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

United Kingdom: OMEGA Engineering Ltd.

ISO 9001 Certified

One Omega Drive
River Bend Technology Centre, Northbank
Irlam, Manchester M44 5BD United Kingdom
Toll-Free: 0800-488-488 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

OMEGAnet®Online Service Internet e-mail

omega.com [e-mail]

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that
apply. OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts
no liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

TABLE OF

CONTENTS

Section Page

1. Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3. Front Panel Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-2 Power Button (ESC, Backlight Button) . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-3 Hold Button (Next Button) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-4 REC Button(Enter Button) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-5 Type Button (s Button, L Button) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-6 Type Button (t Button, R Button). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-7 SET Button (Time Check Button). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-8 Logger Button (OFFSET Button, Sampling Time Check Button . . . . 6

3-9 T1, T2, T3, T4 Input Socket (Type K, Type J). . . . . . . . . . . . . . . . . . . . . 6

3-10 PT1 Input Socket (PT100 Ω). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-11 PT2 Input Socket (PT100 Ω). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-12 RS-232 Output Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-13 DC9V Adapter Socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-14 Tripod Fix Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-11 PT2 Input Socket (PT100 Ω). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-12 RS232 Output Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-13 DC 9V Adapter Socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-14 Tripod Fix Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-15 Battery Cover Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-16 Battery Compartment Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-17 Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3-18 SD Card Socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4. Measuring Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4-1 Type K Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4-2 Type J/T/E/R/S Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4-3 PT 100 Ω Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4-4 T1-T2 Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4-5 Data Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4-6 Data Record (Max/Min Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4-7 LCD Backlight ON/OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5. Datalogger. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5-1 Preparation Before Execute Datalogger Function . . . . . . . . . . . . . . . . 10

5-2 Auto Datalogger (Set Sampling Time ≥ 1 Sec) . . . . . . . . . . . . . . . . . . 11

5-3 Manual Datalogger (Set Sampling Time = 0 Sec). . . . . . . . . . . . . . . . 12

5-4 Auto Datalogger (Set Sampling Time = 0 Sec) . . . . . . . . . . . . . . . . . . 12

5-5 Check Sampling Time Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5-6 SD Card Data Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6. Saving Data from the SD Card to the Computer. . . . . . . . . . . . . . . . . . . . 14

7. Advanced Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

7-1 Set Clock Time (Year/Month/Date, Hour/Minute/Second). . . . . . . . 16

7-2 Decimal Point of SD Card Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

7-3 Auto Power OFF Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

7-4 Set Beeper Sound ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

7-5 Select the Temperature Unit to °C or °F . . . . . . . . . . . . . . . . . . . . . . . . 18

7-6 Set Sampling Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7-7 SD Memory Card Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

8. Power Supply from DC Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

9. Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

10. RS232 PC Serial Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

11. Offset Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1. FEATURES

• Type K/J/T/E/R/S, Pt 100 ohm, measurement with 4 channel display.

• Simultaneously shows 4 channel display on the LCD.

• Type K : -100 to 1300 °C.

• Type J : -100 to 1200 °C.

• Pt 100 ohm : -199.9 to 850.0 °C.

• °C/°F, 0.1 degree/1 degree.

• 4 channels ( T1, T2, T3, T4 ), T1-T2.

• Microcomputer circuit provides intelligent function

and high accuracy.

• Offset adjustment for the Type K/J/T/E/R/S measurement.

• Offset adjustment for the Pt 100 measurement.

• Measuring unit can select to or . 

• Real time SD memory card Datalogger, Built-in Clock

and Calendar, real time data recorder, sampling time set
from 1 second to 3600 seconds.

• Manual datalogger is available (set the sampling
time to 0 second), during execute the manual datalogger
function, can be set at different positions (location)
(position 1 to position 99).

• Easy operation, computer is not needed to
setup with software; After execute datalogger just take
the SD card from the meter and plug in the SD card
into a computer. It will down load all the measured
values with the time information ( year/month/date/
hour/minute/second ) to Excel directly; then the user can
make further data or graphic analysis.

• SD card capacity : 1 GB to 16 GB.

• LCD with green light backlight, easy reading.

• Can default auto power off or manual power off.

• Data hold, record max. and min. reading.

• Microcomputer circuit, high accuracy.

• Powered by 6-AA batteries or 9 Vdc adapter.

• RS232/USB PC COMPUTER interface.

• Heavy duty & compact housing case.

1

2. SPECIFICATIONS

2-1 General Specifications

Circuit Custom one-chip of microprocessor LSI

circuit.

Display LCD size: 52 mm x 38 mm

LCD with green backlight ( ON/OFF ).
Channels T1, T2, T3, T4, T1-T2.
Sensor type Type K thermocouple probe.

Type J/T/E/R/S thermocouple probe.

PT 100 ohm probe

*

Cooperate with an 0.00385 alpha
coefficient, meet DIN IEC 751.

Resolution 0.1°C/1°C, 0.1°F/1°F.
Datalogger Auto 1 second to 3600 seconds
Sampling Time

@ Sampling time can set to 1 second,

Setting range

but memory data may loss.

Manual Push the data logger button

once will save data one time.

@ Set the sampling time to

0 second.

@ Manual mode, can also select the

1 to 99 position ( Location ) no.

Memory Card SD memory card. 1 GB to 16 GB.
Advanced * Set clock time ( Year/Month/Date,
setting Hour/Minute/ Second )

* Decimal point of SD card setting

* Auto power OFF management

* Set beep Sound ON/OFF

* Set temperature unit to °C or °F 

* Set sampling time

* SD memory card Format

2

Temperature Automatic temp. compensation for the
Compensation type K/J/T/E/R/S thermometer.
Linear Linear Compensation for the full range.
Compensation
Offset Available for Type K/J/T/E/R/S and
Adjustment Pt 100 ohm.
Probe Input Type K/J/T/E/R/S
Socket 2 pin thermocouple socket.

Pt 100 ohm : Ear phone socket.

Over Indication Show " - - - - ".
Data Hold Freeze the display reading.
Memory Recall Maximum & Minimum value.
Sampling Time Approx. 1 second.
of Display
Data Output RS 232/USB PC computer interface.

* Connect the optional RS232 cable

UPCB-02 will get the RS232 plug.

* Connect the optional USB cable

USB-01 will get the USB plug.

Power off Auto shut off saves battery life or

manual off by push button.
Operating 0 to 50°C.
Temperature
Operating Less than 85% R.H.
Humidity
Power Supply

*

A

6-AA alkaline batteries

*

A

DC 9V adapter input. ( AC/DC power
adapter is optional ).

3

Power Current Normal operation ( w/o SD card save

data and LCD Backlight is OFF) :

Approx. DC 8.5 mA.

When SD card save the data but and

LCD Backlight is OFF) :

Approx. DC 30 mA.

*AIf LCD backlight on, the power

consumption will increase approx.
14 mA.

Weight 489 g/1.08 LB.
Dimension 177 x 68 x 45 mm

(7.0 x 2.7x 1.9 inch)
Accessories *Instruction Manual
Included

Optional
Accessories

* USB cable, USB-01.

* RS232 cable, UPCB-02.

* Data Acquisition software,

SW-U801-WIN.

* AC to DC 9V adapter.

* Hard carrying case, CA-06.

* Soft carrying case, CA-05A.

2-2 Electrical Specifications (23± 5°C)



PT 100 ohm

Resolution Range Accuracy

0.1  -199.9 to 850.0°C  ± ( 0.4 % + 1°C)

0.1  -327.0 to 999.9°F  ± ( 0.4 % + 1.8°F)
1  1000 to 1562°F  ± ( 0.4 % + 2°F)
*

Pt 100 ohm probe TP-101 is the optional accessory.

4

*4 Type K Thermocouples
*6-AA Alkaline Batteries
*2 GB-SD (2 GB SD Card)

Type K/J/T/E/R/S

Sensor Resolution Range Accuracy
Type

T

ype K 0.1°C -50.1 to -100.0°C  ± ( 0.4 % + 1°C )

-50.0 to 999.9°C ± ( 0.4 % + 0.5°C)

1°C 1000 to 1300°C ± ( 0.4 % + 1°C)

0.1°F -58.1 to -148.0°F ± ( 0.4 % + 1.8°F)

-58.0 to 999.9°F ± ( 0.4 % + 1°F)

1°F 1000 to 2372°F ± ( 0.4 % + 2°F)

T

ype J 0.1°C -50.1 to -100.0°C  ± ( 0.4 % + 1°C)

-50.0 to 999.9°C  ± ( 0.4 % + 0.5°C)

1°C 1000 to 1150°C ± ( 0.4 % + 1°C)

0.1°F -58.1 to -148.0°F ± ( 0.4 % + 1.8°F)

-58.0 to 999.9°F ± ( 0.4 % + 1°F)

1°F 1000 to 2102°F ± ( 0.4 % + 2°F)

T

ype T 0.1°C -50.1 to -100.0°C ± ( 0.4 % + 1°C)

-50.0 to 400.0°C  ± ( 0.4 % + 0.5°C)

0.1°F -58.1 to -148.0°F ± ( 0.4 % + 1.8°F)

-58.0 to 752.0°F ± ( 0.4 % + 1°F)

T

ype E 0.1°C -50.1 to -100.0°C ± ( 0.4 % + 1°C)

-50.0 to 900.0°C ± ( 0.4 % + 0.5°C)

0.1°F -58.1 to -148.0°F ± ( 0.4 % + 1.8°F)

-58.0 to 999.9°F ± ( 0.4 % + 1°F)

1°F 1000 to 1652°F ± ( 0.4 % + 2°F)

T

ype R 1°C 0 to 600°C ± ( 0.5 % + 1°C)

601 to 1700°C ± ( 0.5 % + 1°C)

1°F 32 to 1112°F ± ( 0.5 % + 2°F)

1113 to 3092°F ± ( 0.5 % + 2°F)

T

ype S 1°C 0 to 600°C ± ( 0.5 % + 1°C)

601 to 1500°C ± ( 0.5 % + 1°C)

1°F 32 to 1112°F ± ( 0.5 % + 2°F)

1113 to 2732°F ± ( 0.5 % + 2°F)

Remark :

a. Accuracy value is specified for the meter only.
b. Accuracy is tested under the meter's environment temperature

within 23 ± 5°C.

c. Linearity Correction :

Memorize the thermocouple's curve into the intelligent CPU
circuit,

@ Above specification tests under the environment RF Field Strength

less than 3 V/M & frequency less than 30 MHz only.

5

3. FRONT PANEL DESCRIPTION

Fig. 1

3-1 Display.
3-2 Power Button (ESC, Backlight Button)
3-3 Hold Button (Next Button)
3-4 REC Button (Enter Button)
3-5 Type Button (▲ Button, L Button)
3-6 T1-T2 Button (▼ Button, R Button)
3-7 SET Button (Time check Button)
3-8 Logger Button (OFFSET Button, Sampling time check Button)
3-9 T1,T2,T3,T4 input socket ( Type K, Type J )
3-10 PT1 input socket (Pt 100 ohm)
3-11 PT2 input socket (Pt 100 ohm)
3-12 RS-232 output terminal
3-13 DC 9V adapter socket
3-14 Tripod Fix Nut
3-15 Battery Cover Screws
3-16 Battery compartment/Cover
3-17 Stand
3-18 SD card socket

6

4. MEASURING PROCEDURE

4-1 Type K measurement

1)Power on the meter by pressing the “Power button”

( 3-2, Fig. 1 ) once.

* After the meter is on, pressing the

“Power button” once ( > 2 sec ) will turn off
the meter.

2)Meter default Temp. sensor type is Type K, the display

will show “K” indicator.
The default temperature unit is °C (°F), the method  
to change the Temp. unit from °C to °F or °F to °C,   
please refer to Chapter 7-5, page 18.

3)Insert the Type K probes into the “T1, T2, T3, T4 input

socket” ( 3-9, Fig. 1).
The LCD will show the 4 channels ( T1, T2, T3, T4 )
temperature value at the same time.

* If the certain channels do not insert the temperature

probes, the relative channel display will show over
range " - - - - - ".

4-2 Type J/T/E/R/S measurement

All the measuring procedures are same as the Type K
(section 4-1 ) except to select the Temp. Sensor type to
“ Type J/K/T/E/R/S” by pressing the “Type Button” ( 3-5,
Fig. 1 ) once in sequence until the up LCD display shows the
“J/T/E/R/S” indicator.

7

4-3 Pt 100 ohm measurement

1)All the measuring procedures are same as the Type K

(section 4-1 ) except to select the Temp. Sensor type to
“Pt” by pressing the “Type Button” (3-5, Fig. 1)
once in sequence
until the right down LCD display shows “Pt” text as :

Pt

2)Insert a Pt 100 ohm probe to

PT1 input socket (3-10, Fig. 1)
PT2 input socket (3-11, Fig. 1)

* The Pt 100 ohm measurement only allow

max. two channels ( two probes ) input.

4-4 T1-T2 measurement

When the meter has two installed probes :

Type K/J/T/E/R/S : T1, T2 input socket
Pt 100 ohm : PT1, PT2 input socket

Pressing the “T1-T2 button” ( 3-6, Fig. 1 ), display will
show the difference temperature value between T1, T2
( PT1, PT2 ) as :

T1 °C °C

T1 26.2 1-2

T2 °C °C

T2 26.6 -0.4 T1-T2 value

8

4-5 Data Hold

During measurement mode, press the “Hold Button”
(3-3, Fig. 1) once will hold the measured value & the LCD
will display a “HOLD” symbol.
Pressing the “Hold Button” once again will release the data
hold function.

4-6 Data Record (Max., Min. reading)

1)The data record function records the maximum and

minimum readings. Press the “REC Button” ( 3-4, Fig.
1 ) once to start the Data Record function and there
will be a “REC” symbol on the display.

2)With the “REC” symbol on the display:

a) Press the “REC Button” ( 3-4, Fig. 1 ) once, the

“REC MAX” symbol along with the maximum value
will appear on the display.
If you wish to delete the maximum value, just press
the “Hold Button” (3-3, Fig. 1) once, the display
will show the “REC” symbol only & execute the
memory function continuously.

b)Press the “REC Button” (3-4, Fig. 1) again, the

“REC MIN” symbol along with the minimum value
will appear on the display.
If you wish to delete the minimum value, just press the
“Hold Button” (3-3, Fig. 1) once, the display will
show the “REC” symbol only & execute the
memory function continuously.

c) To exit the memory record function, just press the

“REC” button > 2 seconds. The display will revert to
the current reading.

9

4-7 LCD Backlight ON/OFF

After power ON, the “LCD Backlight” will light
automatically. While in measurement mode, press the
“Backlight Button” (3-2, Fig.1) once will turn OFF the
“LCD Backlight”.
Press the “Backlight Button” once again will turn ON the
“LCD Backlight”.

5. DATALOGGER

5-1 Preparation before executing datalogger function

a. Insert the SD card
Prepare a " SD memory card " ( 1 GB to 16 GB, optional ),
insert the SD card into the " SD card socket " ( 3-18, Fig. 1).
The front panel of the SD card should face against the
down case.

b. SD card Format
If using the SD card for the first time, it is recommended
to make the “SD card Format” first. Please refer to
chapter 7-7 ( page 19 ).

c. Time setting
If using the meter for the first time, you should adjust the
clock time exactly, please refer chapter 7-1 ( page 16 ).

d. Decimal format setting

The numerical data structure of the SD card
is defaulted “ . ” as the decimal. For
example “20.6” “1000.53”. In certain
countries (Europe) the default is “ , ” as the
decimal point. For example “20, 6”
“1000,53”. Under such situation, you should
change the Decimal character at first, details
of setting the Decimal point, refer to Chapter
7-2, page 17.

10

5-2 Auto Datalogger (Set sampling time ≥ 1 second )

a. Start the datalogger

Press the “REC Button (3-4, Fig. 1) once , the LCD will
show the text “REC”, then press the “Logger Button”
(3-8, Fig. 1), the “REC” will flash and the beeper will
sound at the same time the measuring data along with
the time information will be saved into the memory circuit.

Remark :

*

How to set the sampling time, refer to Chapter 7-6,
page 19.

*

How to enable the beeper sound, refer to
Chapter 7-4, page 18.

b. Pause the datalogger

During execute the Datalogger function, press the
“Logger Button” (3-8, Fig. 1) once will pause the
Datalogger function (stop to save the measuring data
into the memory circuit temporally). At the same time
the text of " REC " will stop flashing.

Remark :
If you press the “Logger Button” ( 3-8, Fig. 1 ) once again,
it will execute the Datalogger again, the text of “REC” will
be flashing .

c.. Finish the Datalogger

To pause the Datalogger, press the “REC Button”
( 3-4, Fig. 1) continuously for at least two seconds, the “REC”
indicator will disappear and stop the Datalogger.

11

5-3 Manual Datalogger (Set sampling time = 0
second)

a. Set sampling time is to 0 second

Press the “REC Button” (3-4, Fig. 1) once , the LCD will
show the text “REC”, then press the “Logger Button”
( 3-8, Fig. 1 ) once, the “REC” will flash once and the
Beeper will sound once, at the same time the measuring
data along the time information and the Position no. will
be saved into the memory circuit.

Remark :
* For the 4 channels measurement, the right lower

Display will show the Position/Location no. (P1, P2...
P99) and the T4 measurement value alternately.

* During execute the Manual Datalogger, use

the “▲” Button (3-5, Fig. 1) or “▼” Button (3-6,
Fig.1) to set the measuring position (1 to 99, for
example room 1 to room 99) to identify the
measurement location.

b. Finish the Datalogger

Press the “REC Button” (3-4, Fig. 1) continuously at
least two seconds, the “REC” indication will be
disappear and stop the Datalogger.

5-4 Check time information

During the normal measurement (not execute the
Datalogger). If you press “Time check Button” (3-7, Fig. 1)
once, the lower LCD display will present the time
information of Year/Month, Date/Hour, Minute/Second.

12

5-5 Check sampling time information

During the normal measurement mode (not execute the
Datalogger), If you press “Sampling Button” (3-8, Fig. 1)
once, the lower LCD display will present the Sampling
time information in seconds.

5-6 SD Card Data structure

1)When using for the first time, the SD card

will generate a folder:

TMA01

2)When using for the first time, to execute the Datalogger,

under the route TMA01\, will generate a new
file name TMA01001.XLS.
After this the Datalogger will save the data
to the file TMA01001.XLS until the data column
reaches 30,000 columns, then it will generate
a new file. For example TMA01002.XLS

3)Under the folder TMA01\, if the total files are greater

than 99 files, it will generate a new route, such as

TMA02\ ........

4)The file's route structure :

TMA01\

TMA01001.XLS
TMA01002.XLS

.....................

TMA01099.XLS

TMA02\

TMA02001.XLS
TMA02002.XLS

.....................

TMA02099.XLS

TMAXX\

.....................

.....................

Remark : XX : Max. value is 10.

13

6. Saving data from the SD card
to the computer (EXCEL software)

1)After executing the Data Logger function, remove the

SD card from the “SD card socket” (3-18, Fig. 1).

2)Plug in the SD card into the Computer's SD card slot

or insert the SD card into the “SD card adapter”, then
connect the “SD card adapter” into the computer.

3)Power ON the computer and run the " EXCEL software ".

Down load the saving data file ( for example the file
name : TMA01001.XLS, TMA01002.XLS ) from the SD
card to the computer. The saved data will be displayed onto
the EXCEL software screen (for example as the below
EXCEL data screen). The user can use EXCEL
data to make further Data or Graphic analysis.

EXCEL data screen ( for example )

14

EXCEL graphic screen (for example)

7. ADVANCED SETTING

Under do not execute the Datalogger function,
press the “SET Button” (3-7, Fig. 1) for at least two
seconds will enter the “Advanced Setting” mode.
Pressing the “Next” Button (3-3, Fig. 1) will in
sequence select the seven main functions, the lower
display will show:

dAtE.....

.

Set clock time ( Year/Month/Date, Hour/Minute/
Second )

dEC......

.

Set SD card Decimal character

PoFF..... Auto power OFF management

bEEP.....Set beeper sound ON/OFF

t-CF...... Select the Temp. unit to or ℃ ℉

SP-t...... Set sampling time ( Hour/Minute/Second )

Sd F..... SD memory card Format

15

Remark :
While executing the "Advanced Setting" function,
if you press the “ESC” Button (3-2, Fig. 1) once,
you will exit the “Advanced Setting” function,
the LCD will return to the normal screen.

7-1 Set clock time (Year/Month/Date,
Hour/Minute/Second)

When the lower display show " dAtE "

1)Press the “Enter” Button (3-4, Fig. 1) once,

Use the “▲” Button (3-5, Fig. 1) or “▼” Button
(3-6, Fig. 1) to adjust the value (Setting start from
Year value). After the desired value is set, press the
“Enter” Button (3-4, Fig. 1) once will go to the
next value adjustment ( for example, first setting
value is Year then next to adjust Month, Date, Hour,
Minute, Second value ).

2)After setting all the time value (Year, Month, Date, Hour,

Minute, Second),
the screen will jump to " SD card Decimal character "
setting screen (Chapter 7-2).

Remark :
After the time value is setting, the internal clock will
run even when the Power is off.

16

7-2 Decimal point of SD card setting

The numerical data structure default is “ . ”
as the decimal. For example “20.6” “1000.53”.
In certain countries (Europe) the “ , ” is used as
the decimal point. For example “20,6” “1000,53”.

When the lower display shows “dEC”

1)Use the “▲” Button ( 3-5, Fig. 1 ) or “▲” Button 

( 3-6, Fig. 1 ) to select the upper value to " bASI " or
" Euro ".

bASI - Use “ . ” as the Decimal point with default.
Euro - Use “ , ” as the Decimal point with default.

2)After selecting the upper text to “bASI” or “Euro”,

pressing the “Enter” Button (3-4, Fig. 1) will save the
setting function with default.

7-3 Auto power OFF management

When the lower display shows “PoFF”

1)Use the “▲” Button ( 3-5, Fig. 1 ) or “▲” Button 

(3-6, Fig. 1) to select the upper value to “yES” or “no”.

yES - Auto Power Off management will enable.
no - Auto Power Off management will disable.

2)After selecting the upper text to “yES” or “no”, pressing

the “Enter” Button ( 3-4, Fig. 1 ) will save the setting
function with default.

17

7-4 Set beeper sound ON/OFF

When the lower display shows “bEEP”

1)Use the “▲” Button " ( 3-5, Fig. 1 ) or “▼” Button " 

( 3-6, Fig. 1 ) to select the upper value to " yES " or
" no ".

yES - Meter's beep sound will be ON with default.
no - Meter's beep sound will be OFF with default.

2)After selecting the upper text to “yES” or “no”, press the

“Enter Button” (3-4, Fig. 1) will save the setting
function with default.

7-5 Select the Temp. unit to °C or °F 

When the lower display shows “t-CF”

1)Use the “▲” Button " ( 3-5, Fig. 1 ) or “▼” Button

(3-6, Fig. 1) to select the upper Display text to “C” or
“F”.

C - Temperature unit is °C
F - Temperature unit is °F

2)After Display unit is selected to “C” or “F”, press the

“Enter” Button (3-4, Fig. 1) will save the setting
function with default.

18

7-6 Set sampling time ( SecondS )

When the lower display shows “SP-t”

1)Use the “▲” Button (3-5, Fig. 1) or “▼” Button 

(3-6, Fig. 1) to adjust the value (0, 1, 2, 5, 10, 30,60,
120, 300, 600, 1800,3600 seconds ).

Remark :
If selecting the sampling time to “0 second”, the
RDXL4SD will be ready for manual Datalogging.

2)After the Sampling value is selected, press the

“Enter” Button (3-4, Fig. 1) will save the setting
function with default.

7-7 SD memory card Format

When the lower display shows “Sd F”

1)Use the “▲” Button " (3-5, Fig. 1) or “▼” Button 

(3-6, Fig. 1) to select the upper value to “yES” or
“no”.

yES - Intend to format the SD memory card
no - Not execute the SD memory card format

2)If selecting the upper to “yES”, press the “Enter” Button

(3-4, Fig. 1), the display will show text “yES Ent”.
To confirm again, pressing the “Enter” button once

will format the SD memory, clearing all existing
data that was already saved on the SD card.

19

8. POWER SUPPLY from DC
ADAPTER

The meter can be powered by the DC 9V Power Adapter
(optional). Insert the plug of Power Adapter into
“DC 9V Power Adapter Input Socket” (3-13, Fig. 1).
The meter will power ON (The power Button
function is disabled).

9. BATTERY REPLACEMENT

1)When the left corner of LCD display shows “ ”, it

is necessary to replace the batteries. However, in-spec.
measurement may still be made for several hours after
the low battery indicator appears before the instrument
becomes inaccurate.

2)Remove the battery cover screws (3-15, Fig. 1)

and remove the battery cover (3-16, Fig. 1)
from the instrument and remove the battery.

3)Replace with DC 1.5 V battery (6-AA, Alkaline/heavy duty)

and replace the cover.

4)Make sure the battery cover is secured after changing

the batteries.

10. RS232 PC SERIAL INTERFACE

The instrument has RS232 PC serial interface via a 3.5
mm terminal ( 3-12, Fig. 1 ).

The data output is a 16 digit stream which can be
utilized for user's specific application.

A RS232 lead with the following connection will be
required to link the instrument with the PC serial port.

20

CPreteM

(9W 'D" Connector)

Center Pin........................Pin 4

(3.5 mm jack plug)

Ground/shield.....................Pin 2

2.2 K
resistor

Pin 5

The 16 digits data stream will be displayed in the
following format :

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Each digit indicates the following status :

D15 Start Word
D14 4

D13 When send the upper display data = 1

When send the lower display data = 2

D12, D11 Annunciator for Display

= 01 ℃ = 02℉

D10 Polarity

0 = Positive 1 = Negative

D9 Decimal Point(DP), position from right to the

left
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP

D8 to D1 Display reading, D1 = LSD, D8 = MSD

For example :

If the display reading is 1234, then D8 to
D1 is : 00001234

D0 End Word

21

RS232 FORMAT : 9600, N, 8, 1

Baud rate 9600
Parity No parity
Data bit no. 8 Data bits
Stop bit 1 Stop bit

11. OFFSET ADJUSTMENT

11-1 Type K/J/T/E/R/S offset adjustment

1)Set the function to Type K (or other type J/E/R/T/S).

2)Insert the probe to the T1 input socket (3-9, Fig. 1)

3)Pressing “Offset button” (3-8, Fig. 1) for at least
two seconds then release, the display will show:

SEt oFS

23.7 23.7

* If no probe is inserted

into T1, the meter will

measuring adjust

display “Err”

value value

* Use the " button "( 3-5, Fig. 1 ) " button " ( 3-6

Fig. 1 ) to adjust the desired value on right bottom
display.

* Pressing " Enter button " ( 3-4, Fig. 1 ) once, the

adjustment value will be saved into memory, then return
to normal measuring screen to finish the offset
adjustment procedures.

* The above offset adjustment for Type K/J/T/E/R/S is

valid for T1, T2, T3, T4 at the same time.

7-2 Pt 100 ohm offset adjustment

1)Set the function to Pt 100 ohm.

2)Insert a Pt 100 ohm probe to the PT1 ( PT2 ) input socket.

22

3)Pressing “Offset” button (3-8, Fig. 1)
for at least two seconds then release, the
display will show :

SEt oFS
Pt 1 Pt 2

4)If you wish to make the offset adjustment for Pt 1, please
insert the probe to PT1 input socket. Press the “L” button
(3-5, Fig. 1) once, the display will show example as following.

If you wish to make the offset adjustment for Pt 2, please
insert the probe to PT2 input socket. Press the “R” button
( 3-6, Fig. 1 ) once, the display will show example as
following.

SEt oFS

23.7 23.7

* If no probe is inserted

into PT1, PT2 input

measuring adjust

socket, the meter

value value

will show “Err”

* Use the “▲” button (3-5, Fig. 1) “▼” button (3-6,

Fig. 1) to adjust the desired value on right bottom
display.

* Pressing “Enter” button (3-4, Fig. 1) once, the

adjustment value will be saved into the memory
then return to normal measuring screen to finish
the offset adjustment procedures.

* The above offset adjustment for Pt 100 ohm is

valid for PT1, PT2 individually.

23

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and
workmanship for a period of 13 months from date of purchase. OMEGA’s Warranty adds an
additional one (1) month grace period to the normal one (1) year product warranty to cover
handling and shipping time. This ensures that OMEGA’s customers receive maximum
coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer
Service Department will issue an Authorized Return (AR) number immediately upon phone or
written request. Upon examination by OMEGA, if the unit is found to be defective, it will be
repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting
from any action of the purchaser, including but not limited to mishandling, improper interfacing,
operation outside of design limits, improper repair, or unauthorized modification. This
WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence
of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibra­tion; improper specification; misapplication; misuse or other operating conditions outside of
OMEGA’s control. Components which wear are not warranted, including but not limited to
contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability
for any damages that result from the use of its products in accordance with information
provided by OMEGA, either verbal or written. OMEGA warrants only that the parts
manufactured by it will be as specified and free of defects. OMEGA MAKES NO OTHER
WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR
IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY
WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth
herein are exclusive, and the total liability of OMEGA with respect to this order, whether
based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall
not exceed the purchase price of the component upon which liability is based. In no event
shall OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as
a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity;
or (2) in medical applications or used on humans. Should any Product(s) be used in or with any
nuclear installation or activity, medical application, used on humans, or misused in any way,
OMEGA assumes no responsibility as set forth in our basic WARRANTY/ DISCLAIMER language,
and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability
or damage whatsoever arising out of the use of the Product(s) in such a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN
AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT
(IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be
marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to
prevent breakage in transit.

FOR WARRANTY

RETURNS, please have
the following information available BEFORE
contacting OMEGA:

1. Purchase Order number under which

the product was PURCHASED,

2. Model and serial number of the product

under warranty, and

3. Repair instructions and/or specific

problems relative to the product.

FOR NON-WARRANTY REPAIRS,

consult
OMEGA for current repair charges. Have the
following information available BEFORE
contacting OMEGA:

1. Purchase Order number to cover the COST

of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems

relative to the product.

OMEGA’s p olicy is to make running changes, no t model changes, wh enever an improveme nt is possible.
This affords our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2010 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without
the prior written consent of OMEGA ENGINEERING, INC.

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at omega.com

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