LASCAR ELECTRONICS EASYLOG USB-2 2

EL-USB-2

Humidity, Temperature and Dew Point USB Data Logger

This data logger measures and stores up to 16,382 relative humidity and 16,382 temperature readings over 0 to
100%RH and -35 to +80°C (-31 to +176°F) measurement ranges. The user can easily set up the logging rate and start­time, and download the stored data by plugging the module straight into a PC's USB port and running the purpose
designed software under Windows 98, 2000 or XP. Relative humidity, temperature and dew point (thetemperature at
which water vapor present in the air begins to condense) data can then be graphed, printed and exported to other
applications. The data logger is supplied complete with a long-life lithium battery,whichcantypicallyallowloggingfor
a year. Status indication is via flashing red and green LEDs. The logger is protected against ingress from waterand dust
to IP67 standard whenthe plastic capand seal arefitted.

FEATURES

• 0 to +100%RH Measurement Range

• -35 to +80°C (-31 to +176°F) Measurement Range

• Dew point indication via Windows Control Software

• USB Interface for Set-up and Data Download

• User-Programmable Alarm Thresholds for %RH & T

• Status Indication via Red and Green LEDs

• Supplied with Replaceable Internal Lithium Battery
and Windows Control Software

• Environmental Protection to IP67

%RH

°C

/°

F

WINDOWS CONTROL SOFTWARE

Easy to install and use, thecontrol software runs under Windows 98, 2000 and XP (Home and Professional Editions). It
allows the user to set up and download any EL-USB-2. The latest version of the control software may be downloaded
from .www.lascarelectronics.com

DATA LOGGER SET-UPS

• Logger Name

• °C, °F

• Logging Rate (10s, 1m, 5m, 30m, 1hr, 6hr, 12hr)

• High and Low Alarms for Humidity and Temperature

• Start Date and Start Time

ORDERING INFORMATION

Stock Number

Standard Data Logger EL-USB-2

(Data Logger, Software on CD
and Battery)

Replacement Battery BAT 3V6

SPECIFICATIONS

Specification Min. Typ. Max. Unit

Relative Measurement range 0 100 %RH
Humidity Repeatability (short term) 0.2 %RH

Temperature Measurement range -35 (-31) +80 (176) °C (°F)

Dew Point Accuracy (overall error) (25°C, 40-100%RH) 2 ( 4)*** °C (°F)
Logging rate every 10s every 12hr ­Operating temperature range -35 (-31) +80 (176) °C (°F)
1/2AA 3.6V Lithium Battery Life* 1 Year

* Depending on sample rate, ambient temperature and use of alarm LEDs
** This specifies the overall error in the logged readings, for relative humidity measurements between 20 and 80%RH.
*** This specifies the overall error in the calculated dew point, for relative humidity measurements between 40 and 100%RH at 25°C.
See page 4 of this datasheet for accuracy graphs.

LASCAR ELECTRONICS LTD.
MODULE HOUSE
WHITEPARISH
WILTSHIRE SP5 2SJ
UK
TEL: [phone]
FAX: [phone]
E-mail: [e-mail]

Specifications liable to change without prior warning EL-USB-2 Issue 2 April/2005 M.C. Applies to EL-USB-2

Accuracy (overall error) (20-80%RH) 3.5** %RH
Response time 5 sec
Long term stability 1

Repeatability
Accuracy (overall error)
Response time

LASCAR ELECTRONICS INC.
3750 West 26th Street
Erie
PA 16506
USA
TEL: [phone]
FAX: [phone]
E-mail: [e-mail]

+

+

%RH/Yr

0.2 ( 0.4) °C (°F)

++

1 ( 2) 2.5 ( 5) °C (°F)

++ + +

20 sec

++

LASCAR ELECTRONICS (HK) LIMITED
FLAT C, 5/FL., LUCKY FTY. BLDG.
63-65 HUNG TO ROAD
KWUN TONG KOWLOON
HONG KONG
TEL: [phone]
FAX: [phone]
E-mail: [e-mail]

www.lascarelectronics.com

Page1of1

EL-USB-2

Humidity, Temperature and Dewpoint USB Data Logger

LED FLASHING MODES

EL-USB-2 features 2 bi-colour LEDs, one LED represents temperature measurement, the other represents RH. Each is clearly
marked on the logger. To save power, the status indication alternates between the two channels every 10 seconds. So first you
will see thestatus of the temperaturelogging and 10 seconds lateryou will see thestatus of the RHlogging and soon.

1.

TRH

10 seconds later

TRH

2. The number of flashes and colours indicate :

(Single flash) The channel is logging, no alarm

(Double flash) Delayed start

(Triple flash) Logger full, no alarm

(Single flash) The channel is logging, low alarm

(Double flash) The channel is logging, high alarm

(Triple flash) Logger full, alarm

Specifications liable to change without prior warning EL-USB-2 Issue 2 April/2005 M.C. Applies to EL-USB-2

www.lascarelectronics.com

EL-USB-2

Humidity, Temperature and Dewpoint USB Data Logger

LED FLASHING MODES

LEDs Meaning Action

No LEDs flash

- No logging started. Start logging.
or

RH T

- Battery fitted but completely discharged. Replace battery.
or

- No battery fitted. Fit battery, start logging.

Plug the data logger into the PC and run the control software
to find out which condition applies.

Repeating
sequentially

RH T RH T

RH T RH T

RH T

after 10s

RH T

10s

10s 10s

or

10s 10s

or

Alternating green double flash every 10 seconds

- Logger configured for delayed start. No action needed,
logger will start at a
later date and time.

Alternating green single flash every 10 seconds

- Logger operating. None

- Last stored Humidity and Temperature readings within set

alarm levels.

(if latching is enabled, then a flashing Green LED indicates that no

alarm condition has ever been logged)

Alternating between green and red single flash every 10 seconds

- The green LED indicates the parameter that is within set

alarm levels.

- The red LED indicates the parameter for which the Low

Alarm level has been exceeded.

(if latching is enabled, then the alarm condition may have

been triggered a while ago)

Alternating between green single and red double flash every 10 seconds

- The green LED indicates the parameter that is within set

alarm levels.

- The red LED indicates the parameter for which the High

Alarm level has been exceeded.

(if latching is enabled, then the alarm condition may have

been triggered a while ago)

RH T RH TRH T RH T

10s 10s10s 10s

oror or

RH T

60s

Alternating between green or red triple flash every 10 seconds

Warning

In this condition, latching is automatically enabled, and a flashing Green
LED indicates that no alarm condition has ever been logged.

Simultaneous red single flash every 60 seconds

Warning

: Logger memory is full. Download data.

: Battery is nearly discharged. Fit new battery and

No alarm conditions are indicated. download data.

Once the battery is exhausted, no LEDs will flash.

Specifications liable to change without prior warning EL-USB-2 Issue 2 April/2005 M.C. Applies to EL-USB-2

www.lascarelectronics.com

EL-USB-2

Humidity, Temperature and Dewpoint USB Data Logger

DIMENSIONS All dimensions in mm (inches)

Internal Relative Humidity and Temperature Sensor Location

26.4 (1.04)

103 (4.06)

BATTERY REPLACEMENT

Werecommend that youreplace the batteryevery 12 months,or prior tologging critical data.

The EL-USB-2 does not lose its stored readings when the battery is discharged or when the battery is replaced; the
data logging process will however be stopped and cannot be re-started until the battery has been replaced and the
logged data hasbeen downloaded toPC.

Only use 3.6V 1/2AA lithium batteries. Check with your supplier that thebattery you are ordering is 'press fit'and
is not fitted with solder tags. Beforereplacing the battery,remove the EL-USB-2 from the PC.

Note:
Leaving the EL-USB-2 plugged into the USB port for longer than necessarywill cause some of the battery capacity

to be lost.

WARNING: Handle lithium batteries carefully,observe warnings on battery casing.

Dispose of in accordance with local regulations.

RECONDITIONING PROCEDURE

Exposure of the internal sensor to chemical vapors may interfere with the internal sensor and cause inaccurate
readings to be logged. In a clean environment, this will slowly rectify itself. However, exposure to extreme
conditions or chemical vapors will require the following reconditioning procedure to bring the internal sensor back
to calibration state.
80°C (176°F) at< 5%RH for36h (baking) followedby
20-30°C (70-90°F) at> 74%RH for48h (re-hydration)
High levels ofpollutants may causepermanent damage tothe internal sensor.

MEASUREMENT ACCURACY

Specifications liable to change without prior warning EL-USB-2 Issue 2 April/2005 M.C. Applies to EL-USB-2

www.lascarelectronics.com