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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 start-
time, 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 (the temperature 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, which can typically allow logging for
a year. Status indication is via flashing red and green LEDs. The logger is protected against ingress from water and dust
to IP67 standard when the plastic cap and seal are fitted.
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
°C
%R H
/ °F
? Status Indication via Red and Green LEDs
? Supplied with Replaceable Internal Lithium Battery
and Windows Control Software
? Environmental Protection to IP67
WINDOWS CONTROL SOFTWARE
Easy to install and use, the control 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
ORDERING INFORMATION
? 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
SPECIFICATIONS
Standard Data Logger
(Data Logger, Software on CD
and Battery)
Replacement Battery
Stock Number
EL-USB-2
BAT 3V6
Specification
Min.
Typ.
Max.
Unit
Relative
Humidity
Temperature
Measurement range
Repeatability (short term)
Accuracy (overall error) (20-80%RH)
Response time
Long term stability
Measurement range
Repeatability
Accuracy (overall error)
Response time
0
-35 (-31)
+ 0.2
+ 3.5**
5
1
+ 0.2 ( + 0.4)
+ 1 ( + 2)
20
100
+80 (176)
+ 2.5 ( + 5)
%RH
%RH
%RH
sec
%RH/Yr
°C (°F)
°C (°F)
°C (°F)
sec
Dew Point
Logging rate
Accuracy (overall error) (25°C, 40-100%RH)
every 10s
+ 2 ( + 4)***
every 12hr
°C (°F)
-
Operating temperature range
1/2AA 3.6V Lithium Battery Life*
-35 (-31)
1
+80 (176)
°C (°F)
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.
Martel Electronics Corporation
PO Box 770
Londonderry, NH 03053 USA
Tel: 800-821-0023
Email: sales@martelcorp.com
Web: www.martelcorp.com
? Copyright 2005 Martel Eectronics Corporation
All trademarks are the property of their respective owners.
P/N 000000000 Rev. x
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