Display Visions 的 EL-USB-2 规格书

EL-USB-2
Temperature, Humidity and Dew Point
Data Logger
www.lascarelectronics.com
Issue 14 08/2016 N.R Page 1 of 4
This standalone data logger measures and stores over 16,000 temperature and humidity readings from -35 to +80°C (-31 to +176°F)
and 0 to 100%RH range at a resolution of 0.5°C (1°F) and 0.5%RH.
The user can easily set up the logger and view downloaded data by plugging the data logger into a PC’s USB port and using the
free EasyLog software. Data, including calculated dew point, can then be graphed, printed and exported to other applications for
detailed analysis.
The data logger is supplied with a lithium metal battery, giving up to three years’ logging life. The logger is protected against ingress
from water and dust to IP67 standard when the cap is fitted.
▪ -35 to +80°C (-31 to +176°F) and 0 to 100%RH measurement range
▪ Stores over 16,000 readings for both temperature and humidity
▪ EasyLog software available as a free download
▪ Logging rates between 10 seconds and 12 hours
▪ Immediate and delayed logging start
▪ User-programmable alarm thresholds for both temperature and humidity
▪ Status indication via red/green LEDs
▪ Environmental protection to IP67
Temperature Measurement range -35°C to 80°C (-31°F to 176°F)
Internal resolution 0.5°C (1°F)
Accuracy (overall error)* 0.55°C (1.04°F) typical (5 to 60°C)
Long term stability <0.02°C (0.04°F) / year
Relative Humidity Measurement range 0 to 100%RH
Internal resolution 0.5%RH
Accuracy (overall error)* 2.25%RH typical (20 to 80%RH)
Long term stability <0.25%RH / year
Dew Point Accuracy (overall error)* 1.7°C typical
(-35 to 80°C, 40 to 100%RH)
Logging rate User selectable between 10
seconds & 12 hours
Operating temperature range -35 to +80°C (-31 to +176°F)
Battery life 3 years (at 25°C and 1 minute
logging rate)
Readings 16,382 temperature, 16,382
relative humidity
Dimensions 108 x 25 x 22mm
(4.25 x 0.98 x 0.86”)
* The overall error takes in to account the sensor accuracy (as shown on page 3) and the resolution of the
data logger
SPECIFICATIONS ACCESSORIES
Replacement battery
Handheld data logger
programmer & collector
BAT 3V6 1/2AA
EL-DataPad
INCLUDED IN THE BOX
Battery
Mounting Bracket
BAT 3V6 1/2AA
EL-USB WALL BRACKET
CALIBRATION CERTIFICATES NOW AVAILABLE
Lascar now offers a Traceable Calibration Certificate Service on Temperature Data Loggers. Using reference equipment
which has been calibrated by a UKAS/NIST accredited laboratory and using apparatus traceable to national or
international standards. For more information, please see www.lascarelectronics.com.
e‘edromcs em
EL-USB-2
Temperature, Humidity and Dew Point
Data Logger
www.lascarelectronics.com
Issue 14 08/2016 N.R Page 2 of 4
EL-WIN-USB
Lascar’s EasyLog control software is available as a free download from www.easylogusb.com. Easy to install and use, the control
software is compatible with 32-bit and 64-bit versions of Windows 7, 8 & 10. The software is used to set up the logger, download,
graph and annotate data or export in Excel, PDF and jpeg formats.
The software allows the following parameters to be configured:
▪ Logger name
▪ Measurement parameter (°C or °F)
▪ Logging rate (user selectable between 10 seconds and 12 hours)
▪ High and low alarms
▪ Immediate and delayed logging start
Download the latest version of the software free of charge from www.easylogusb.com
LED STATUS INDICATION
The EL-USB-2 features two green/red LEDs, one to represent temperature measurement and the other to represent humidity
measurement. Each is clearly marked on the logger. To save power, the status indication alternates between the two channels
every 10 seconds. First you will see the status of the temperature channel and 10 seconds later you will see the status of the RH
channel and so on.
10 seconds later
°C (°F)RH% RH% °C (°F)
In normal operation the green LED will flash, but will change to red if an alarm condition has been triggered. Using EL-WIN-USB it
is possible to set the alarm to remain active even if the reading has returned to normal, in which case the alarm LED will continue
to flash red. This ‘Hold’ feature in the software ensures the user is notified that at some point an alarm level has been exceeded,
without needing to download the data.
Green double flash
The data logger is not currently logging, but is primed to start at a later date and time (delayed start)
Green single flash
The data logger is currently logging. No alarm on the channel
Red single flash
The data logger is currently logging. Low alarm on the channel
Red double flash
The data logger is currently logging. High alarm on the channel
Green triple flash
The data logger is full and has stopped logging. No alarm on the channel
Red triple flash
The data logger is full and has stopped logging. Alarm (high, low or both) on the channel
No LEDs flash
The data logger is stopped, the battery is empty or there is no battery
Dual Red flash (every 60 seconds)
The data logger battery is running low as it’s voltage has dropped below 2.9V
m EasyLogs em e‘edronics
EL-USB-2
Temperature, Humidity and Dew Point
Data Logger
www.lascarelectronics.com
Issue 14 08/2016 N.R Page 3 of 4
SENSOR ACCURACY & INFORMATION
± 0
± 2
± 4
± 6
± 8
± 10
0102030405060708090100
Relative Humidity (%RH)
Δ
RH (%RH)
maximum error
typical accuracy
± 0.0
± 0.5
± 1.0
± 1.5
± 2.0
-40 -200 20 40 60 80
Temperature (°C)
maximum error
typical accuracy
ΔT (°C)
0
20
40
60
80
100
-40-20 020406080100 120
Temperature (°C)
Relative Humidity (%
)
Max.
Range
Normal
Range
100 ±3.5 ±3 ±3.5 ±4
90 ±2.5 ±3 ±3.5
80 ±3 ±3.5
70 ±3 ±2.5 ±3
60
50 ±2.5 ±2
40
30
20
10 ±3 ±2.5
0±3.5±3
01020304050607080
Relative Humidity (%RH)
Temperature (°C)
EL-USB-2, EL-USB-2-LCD
Typical and maximal tolerance at 25°C for relative humidity.
± 0
± 2
± 4
± 6
± 8
± 10
0102030405060708090100
Relative Humidity (%RH)
Δ
RH (%RH)
maximum error
typical accuracy
± 0.0
± 0.5
± 1.0
± 1.5
± 2.0
-40 -200 20 40 60 80
Temperature (°C)
maximum error
typical accuracy
ΔT (°C)
0
20
40
60
80
100
-40-20 020406080100 120
Temperature (°C)
Relative Humidity (%
)
Max.
Range
Normal
Range
100 ±3.5 ±3 ±3.5 ±4
90 ±2.5 ±3 ±3.5
80 ±3 ±3.5
70 ±3 ±2.5 ±3
60
50 ±2.5 ±2
40
30
20
10 ±3 ±2.5
0±3.5±3
01020304050607080
Relative Humidity (%RH)
Temperature (°C)
EL-USB-2, EL-USB-2-LCD
Typical and maximal tolerance for temperature sensor in °C.
± 0
± 2
± 4
± 6
± 8
± 10
0102030405060708090100
Relative Humidity (%RH)
Δ
RH (%RH)
maximum error
typical accuracy
± 0.0
± 0.5
± 1.0
± 1.5
± 2.0
-40 -200 20 40 60 80
Temperature (°C)
maximum error
typical accuracy
ΔT (°C)
0
20
40
60
80
100
-40-20 020406080100 120
Temperature (°C)
Relative Humidity (%
)
Max.
Range
Normal
Range
100 ±3.5 ±3 ±3.5 ±4
90 ±2.5 ±3 ±3.5
80 ±3 ±3.5
70 ±3 ±2.5 ±3
60
50 ±2.5 ±2
40
30
20
10 ±3 ±2.5
0±3.5±3
01020304050607080
Relative Humidity (%RH)
Temperature (°C)
EL-USB-2, EL-USB-2-LCD
Typical accuracy of relative humidity measurements given in
%RH for temperatures 0 to 80°C.
± 0
± 2
± 4
± 6
± 8
± 10
0102030405060708090100
Relative Humidity (%RH)
Δ
RH (%RH)
maximum error
typical accuracy
± 0.0
± 0.5
± 1.0
± 1.5
± 2.0
-40 -200 20 40 60 80
Temperature (°C)
maximum error
typical accuracy
ΔT (°C)
0
20
40
60
80
100
-40-20 020406080100 120
Temperature (°C)
Relative Humidity (%
)
Max.
Range
Normal
Range
100 ±3.5 ±3 ±3.5 ±4
90 ±2.5 ±3 ±3.5
80 ±3 ±3.5
70 ±3 ±2.5 ±3
60
50 ±2.5 ±2
40
30
20
10 ±3 ±2.5
0±3.5±3
01020304050607080
Relative Humidity (%RH)
Temperature (°C)
EL-USB-2, EL-USB-2-LCD
Operating conditions
Long term exposure to humidity levels outside of the
‘normal’ range may temporarily offset RH measurements
(±3%RH after 60 hours). Once returned to less extreme
conditions the device will slowly return towards calibration
state.
When tracking changes in ambient conditions, the response time of the humidity sensor in your data logger is approximately
20 minutes to reach 90% of the reading. However, if you are measuring step changes in humidity (for example if calibrating the
product) it is advised that you leave the unit for up to four hours to ensure that it has enough time to settle at the new level.
It is worth remembering that the value of relative humidity is of course sensitive to temperature variation. As an example, at a
relative humidity of ~90%RH at ambient temperature, a variation in temperature of 1°C will result in a change of up to -5%RH.
Therefore when comparing multiple devices or calibrating them, any temperature variations must be considered.
@MSCAR e‘edronics
EL-USB-2
Temperature, Humidity and Dew Point
Data Logger
www.lascarelectronics.com
Issue 14 08/2016 N.R Page 4 of 4
BATTERY INFORMATION
Replacement
We recommend that you replace the battery annually, or prior to logging critical data. Only use 3.6V ½AA lithium metal batteries.
The data logger does not lose its stored readings when the battery is discharged or replaced; however, the data logging process will
stop and will not resume until the battery is replaced and the logger restarted by EL-WIN-USB or an EL-DataPad.
Before replacing the battery, remove the data logger from the PC. Please note that leaving the data logger plugged into the USB
port for extended periods will cause some of the battery capacity to be lost.
Passivation
If left unused for extended periods of time the lithium metal batteries, including those used in the EasyLog range of data loggers,
naturally form a non-conductive internal layer preventing them from self-discharge and effectively increasing their shelf life.
When first installed in the data logger, this may cause a momentary drop in the battery voltage (the Transient Minimum Voltage)
as the internal layer is broken down, resulting in the data logger resetting. Inserting the batteries in the data logger and leaving
it connected to a PC for about 30 seconds will remove this layer. After this, remove and re-install the batteries to reset the data
logger. Overall battery life will not be affected.
WARNING
Handle lithium metal batteries carefully, observe warnings on battery casing. Dispose of in accordance with local regulations.
The humidity measuring element in the humidity data loggers can be contaminated through exposure to a variety of compounds.
These products should not be kept in proximity to volatile chemicals such as solvents and other organic compounds. Generally
speaking, if a material or compound emits a strong odour you should not keep your humidity data logger in close proximity to it.
If you would like more information, please contact your local Lascar Electronics office.
Exposure to extreme conditions or chemical vapours will require the following reconditioning procedure to bring the internal
sensor back to calibration state:
Baking 80°C (176°F) at < 5%RH for 36 hours.
Re-hydration 20 to 30°C (70 to 90°F) at > 74%RH for 48 hours.
High levels of pollutants may cause permanent damage to the internal sensor.
SENSOR ACCURACY & INFORMATION