Omega RH318 User guide

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User’s Guide

RH318

Data Logger

Hygro-Thermometer

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MADE IN TAIWAN

Servicing North America:

U.S.A.: 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: [email protected]

Canada: 976 Bergar

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

For immediate technical or application assistance:

U.S.A. 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 Español: 001 [phone] FAX: [phone]
Latin America [email protected] e-mail: [email protected]

Servicing Europe:

Benelux: Managed by the United Kingdom Office

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

Czech Republic: Frystatska 184

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

France: Managed by the United Kingdom Office

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

Germany/Austria: Daimlerstrasse 26

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

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: [email protected]

OMEGAnet®Online Service Internet e-mail

omega.com [email protected]

It is the policy of OMEGA Engineering, Inc. 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 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 CONTENT

1. SAFETY INFORMATION............................................................................................................................... 1

2. GENERAL DESCRIPTION ............................................................................................................................ 1

3. FEATURE ...................................................................................................................................................... 1

4. SPECIFICATIONS ......................................................................................................................................... 1

5. BUTTONS AND FUNCTIONS ....................................................................................................................... 3

6. DATA LOGGER ............................................................................................................................................. 5

7. SETTING DATE AND TIME .......................................................................................................................... 6

8. POWER PREPARATION .............................................................................................................................. 7

9. TESTLINK SE-318 SOFTWARE FOR RH318 .............................................................................................. 7

Page i

1. S AFETY INFORM ATION

Read the following safety information carefully before attempting to operate or service the meter. Use the
meter only as specified in this manual; otherwise the protections provided by the meter may be impaired.

ENVI RONMENT CONDITIO NS

 Altitude up to 2000 meters
 Relatively humidity: 90% max
 Operation ambient temperature: 0 to 40°C

MAINTENANC E & CLEARING

 Periodically wipe the case with a dry cloth. Do not use abrasives or solvents on this inst

S

AFETY SYMBOLS

Comply with EMC

rument.

2. G ENERAL DE S C RIPTION

Thank you for choosing our Data Logger Hygro-thermometer. To ensure the safety and the best performance
of this instrument, we recommend you to read and follow the manual carefully before any operation.

Measurement settings and results are shown on the backlit LCD panel.

Data can be stored in the meter or directly saved on a computer through PC interface. Recorded data can be
further processed on a computer.

3. F E ATURE

 Interchangeable digital probes
 Thermistor sensor for temperature measurement, fast response time
 Dual display
 Dew point measurement
 16,000 Records Data Logger
 PC Interface
 With Windows software
 Auto power off for battery saving

4. S PECIFICATI O NS

Sensor type

Relative humidity range

Temperature range

Dew point temperature range

Resolution

Electronic capacitance polymer film sensor / NTC

0 to 100%RH

- 20 to 60°C (- 4 to 140°F)

- 20 to 60°C (- 4 to 140°F)

0.1%RH, 0.1°C, 0.1°F

Page 1

Accuracy Probe: RP-32

<10%RH, >90%RH ±4.0%RH

10%RH to 90%RH ±2.0%RH

-20 to 60°C (-4 to 140°F) ±0.8°C (±1.5°F)

Probe: RP-31

<10%RH, >90%RH ±5.0%RH

10%RH to 90%RH ±3.0%RH

-15 to 35°C (-60 to 95°F) ±0.8°C (±1.5°F)

<15°C (60°F), >35°C (95°F) See figure below

Response time

Sensor hysteresis

Temperature coefficient

Sample rate

Battery type

Battery lifetime

Ac adapter

Operation temperature

Operation humidity

Storage temperature

Storage humidity

Dimensions

Weight

(@ t90; in slowly moving air)
Humidity: 180 sec.

Temperature: 10 sec.

<1.5%RH

0.1 x (specified accuracy) per 1°C (<23°C or >23°C)

2 times per second

9V Battery

Approx. 80 hours (alkaline battery)

9 V

( 8-10VDC Max )

DC

0 to 40°C (32 to 104°F)

10 to 90%RH

-10 to 60°C (14 to 140°F)

10 to 75%RH

Meter: 185mm(L) × 65mm(W) × 36mm(H)
Probe: 15mm Diameter x 94mm(L)

Approx. 285g

Standard Accessories

Optional Accessory

Instruction manual, 9V Battery, windows software, carrying case,
USB cable

AC adapter

Page 2

5. BUTTONS AN D FUNCTIONS

BUTTON ALLOCATIO N

DISPLAY SCREEN

SYMBOL FUNCTION

%RH

REC

td

HOLD

m-d

h:m

°F, °C

Low battery indicator

Auto power off indicator

Maximum/minimum indicator

Relative Humidity reading

Relative humidity measurement unit

Recording data logger indicator

Dew point temperature

Data hold indication

Month-day

Hour: minute

Temperature reading

Temperature measurement units

Page 3

FUNCTIONS

1

Sensor probe

2

Display screen

3

Power / Backlight button

Power on/off

Press the

button to turn on the unit. To turn the unit off, press and hold button down until the

screen shows “OFF 3, 2, 1, 0,” then the LCD screen goes off.

Note: When the unit is on, the LCD will show the following initial information before entering the main
function: Available memory



Current date  Current time  Entering main function

LCD backlight on/off

Press

to turn on the LCD backlight, making it easier to read in dark environment. Press again
to turn off backlight. The backlight will turn itself off automatically after 30 seconds to save battery
power.

Auto power off

To save battery life, by default, every time the unit is powered on, it is under auto power off mode.
The unit will power itself off after 30 minutes if no key operation.

Auto power off will be automatically disabled under the following 2 circumstances:

 When connecting to PC
 When data logger function is on process

Disabled auto

(

1) Turn off the unit.

power off

(2) Press and hold HOLD button, and keep holding HOLD button.

(3) Press to turn on the unit.
(4) The LCD shows the initial information and then enter main function.
(5) Release HOLD button.
(6) Make sure the auto power off symbol disappears from display screen.

4

REC button

Press REC button to start recording data. The REC symbol will display on the screen. To stop
recording, press REC button again.

5

Relative Humidity/Dew Point Temperature switch

By default, the LCD displays Relative Humidity when the unit is powered on. To display dew point
(DP) temperature, press td %RH button. Press td %RH button again to switch back to Relative
Humidity.

6

MAX/MIN mode

Under this mode, the unit simultaneously monitors and stores the maximum and minimum value
(both humidity and temperature) in the memory. The unit will keep updating/refreshing the data.

To start

Page 4

(1) Press MAX/MIX button. MAX symbol lights up on LCD, the reading shows the maximum data.
(2) Press MAX/MIX button again to show minimum data; the MIN symbol lights up on LCD.
(3) Press MAX/MIX button again, the MAX and MIN symbol blinks together. The reading shows

present humidity and temperature.

(4) Press MAX/MIX button again, MAX symbol lights up, and the mode returns to (1).

To exit

Press and hold MAX/MIX button for 2 seconds to stop storing maximum and minimum data.

Note: When the unit is in the MAX/MIN mode, °C/°F button is disabled.

7

Data-Hold mode

Press HOLD button to freeze the data shows on the LCD screen. Press again to exit Data-Hold
mode.

Note: When the unit is in the Data-Hold mode, the MAX/MIN, °C/°F, and td %RH buttons are
disabled.

8

Selecting temperature units

By default, each time the unit is powered on, the scale is set to the Celsius (°C). Press the °C/°F
button to switch between Celsius (°C) and Fahrenheit (°F).

9

Connecting to a computer

The PC jack signal output is a 9600 bps N 8 1 serial interface. Use the USB cable (standard
accessory) to connect with a computer.

10

External DC 9V power supply jack

Connect the AC adapter (optional accessory) to use external power.

11

Tilt stand

12

Battery Compartment

6. D ATA LOG G ER

This section will explain how to store data (data logger) in memory and how to recall data from memory.

SETTING INTERVAL TIM E FOR DATA STORING

(1) Turn off the unit.
(2) Enter SETUP mode by pressing and holding MIN/MAX button and then press

turn on the unit. “SEt” blinks on the LCD screen.

power button to

(3) Press INTV (HOLD) button to set interval time.

Page 5

(4) Press (td %RH) or (°C/°F) to adjust the interval minute, press INTV (HOLD) button again to

adjust second.

(5) When finished, press INTV (HOLD) button to exit SETUP mode.

Note: To abort during the process, press power button to exit SETUP mode.

ST ART D ATA LOGGE R (STOR ING DATA IN THE MEMORY )

(1) Press REC button to start data logger (storing the measured values in built-in memory).
(2) REC symbol lights up on LCD screen.
(3) Press REC button again to stop recording.

Note: During recording period, most of the buttons are disabled, such as the td %RH, °C/°F, etc. All
other settings must be made before starting the data logger function.

Note: When the memory is full (16000 recorders), REC symbol will blink on the LCD screen. The data
logger stops.

Note: When battery power low ( symbol lights up on the screen), data logger cannot be started. If
during data logger, the battery starts running low, data logger will stop automatically.

CLEARING D ATA

(1) Turn off the unit.
(2) Press and hold REC button and then press

power button to turn on the unit.

(3) Keep holding REC button, then LCD will show "CLr" and “SURE 5, 4…1, 0” until clean the memory.

(To abort, release REC button before “SURE 0”.)

7. S E TTING DATE AND TIME

The unit incorporates a clock so that the data logger function can also record the data and time along with
the measurement value in the memory.

SETTING DATE AND TIM E

(1) Turn off the unit.
(2) Enter SETUP mode by pressing and holding MIN/MAX button and then press

turn on the unit. “SEt” blinks on the LCD screen.

power button to

(3) Press CLOCK (REC) button to set clock.
(4) Press (td %RH) or (°C/°F) to adjust year, press CLOCK (REC) button to adjust next value

(month date hour minute).

(5) When finish, press CLOCK (REC) button to exit SETUP mode.

Page 6

Note: To abort during the process, press power button to exit SETUP mode.

Note: An internal backup battery supplies power for the clock.

8. POWER PREPAR ATION

BATT ERY LO ADING

Remove the battery cover on the back and insert one 9V battery.

BATT ERY RE PLACEM ENT

When the battery voltage drops below the operating voltage, Low battery indicator will appear.
Replace a 9 Volt battery immediately to ensure the unit functions properly.

AC ADAPTER CONNECTIO N

When the AC adapter is used, insert the plugs of the adapter into the DC9V connector on the side panel.

Note: When the AC adapter is connected while battery is inserted, the u
ad

apter (the AC adapter has priority).

nit will be powered from the

9. TESTLINK SE -3 18 SOFTWAR E

The SE-318 package contains:

 80mm CD
 Custom designed USB cable for SE318

SYST EM REQUIR ED

Windows NT 4.0/ NT2000/ XP/ VISTA/ Windows 7

MINIMUM HARDW ARE REQUIRED

 PC or NoteBook with Pentium 800MHz or higher, 128 MB RAM
 At least 50 MB hard disk space available to install SE318
 Recommended screen resolution 800X600 or above

INST ALL SE-318

1. We recommend closing all other applications before installing SE318.

2. Insert setup CD disk to CD disk drive.

3. Choose the Start butto
. Type E:\SETUP and choose OK, then it will copy SE318.exe (executable file) and help file to your

4

hard disk (default path is c:\program files\SE318).

n on the Taskbar and select Run.

For other detailed operation instructions, please refer to the online help while executing SE318.

MAIN MENU AND BUTTON S

Open - Retrieve files from the disk

Save - Save the present data to the disk

Print - Send data in the present table to the printer

Pause - Stop data recording

Page 7

Run - Start data recording

Output To Graph - Send tabular data to another graph

New - Reset all the data

ption - Setup dialog to set attributions of graph. (You can also double click on the graph.)

O

Sampling Rate - Time interval between each data to be recorded. If you want to change it, move mouse

cursor to the digit you want to change and click, then input the new sampling rate. The change will be
effective immediately. It will keep up to 5000 data points, when data points exceed this limit, the oldest
100 points will be replaced sequentially

L TIM E GRAPH

REA

You can Zoom this graph by using mouse:

To Zoom:

1. Press and hold the Shift key

2. Press the left mouse button and drag the cursor to select the new extents

3. Release the mouse button

To Undo the Zoom:

Press the Alt+U key or click Undo Zoom button

Note: Zooming method is not allowed in Real Time Graph Window.

TABULAR

Page 8

The Tabular window can be used to record real time data in a table format. The maximum number of records
that the Tabular window can keep will be depending on how many available memory and hard disk space of
the connected computer.

DATA LOGGER

When you have thermometer connected to computer, select "Load Data" to start loading the recorded data
from the thermometer. There will be a progress indicator to show the loading progress.

If error occurs, just click

fter the data has been successfully loaded to computer, the left side window shows how many data sets

A

"Load Data" again.

were loaded and their detailed information (start date, start time, recording rate, and record numbers).

For example:

It will transfer the first data set to graph and tabular on the right side window once you finish loading recorded
data from the thermometer. You can click on at any data set to show its graph and tabular on the right side
window.

You can choose a rectangle area on the graph to zoom in for detail.

The vertical dash line in the graph will match the highlight row in the tabular. When clicking on another row in
the tabular, the vertical dash line will move to the correspondin

g position to match the time.

Page 9

FREQ UENTLY ASKED QUE STION

1. I have connected thermometer to computer serial port and turned thermometer on, but it still shows

"NO CONNECTION."

 It could be caused by that all serial port are occupied by other applications. Close all application,

restart your computer, and run SE318 again.

2. In TABULAR window, I saved a file. Can I use EXCEL to open this file?

 If the decimal separator is comma (,) in your area, you cannot use CSV file because CSV

us

e comma to separate data. This will cause confusion (for example 23,6,C,24.6,C).

 However, you can use TXT files instead. It uses tab to separate to data.

(For example: 23.6 C 24.6 C) and it can be accepted in EXCEL.

3. How to uninstall SE318?

 Uninstall SE318 by launching the Add/Remove Programs applet out of the Control Panel,

highlighting the SE318, and clicking on the Add/Remove... button, then it will remove the SE318
folder and files from your comp

file

uter.

Page 10

NOTES:

Page 11

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 in which wear is not warranted, include but are 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 policy is to make running changes, not model changes, whenever an improvement 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.

M4933/1010

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