Datasheet

EL-USB-1
Temperature Data Logger
www.lascarelectronics.com/data-loggers
Issue 16 02/2017 Page 2 of 2
LED STATUS INDICATION
The EL-USB-1 features two LEDs: a green/
red LED to indicate logging and alarm
status, and an amber LED to indicate a
possible problem.
In normal operaon the green LED will
ash, but will change to red if an alarm
condion has been triggered. Using
EL-WIN-USB it is possible to set the alarm
to remain acve even if the reading has
returned to normal, in which case the
alarm LED will connue to ash red.
This ‘Hold’ feature in the soware
ensures the user is noed that at some
point an alarm level has been exceeded,
without needing to download the data.
BATTERY INFORMATION
Replacement
We recommend that you replace the baery annually, or prior to logging crical data. Only use 3.6V ½AA lithium metal baeries.
The data logger does not lose its stored readings when the baery is discharged or replaced; however, the data logging process will
stop and will not resume unl the baery is replaced and the logger restarted by EL-WIN-USB or an EL-DataPad.
Before replacing the baery, 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 baery capacity to be lost.
Passivaon
If le unused for extended periods of me lithium metal baeries, including those used in the EasyLog range of data loggers,
naturally form a non-conducve internal layer prevenng them from self-discharge and eecvely increasing their shelf life. When
rst installed in the data logger, this may cause a momentary drop in the baery voltage (the Transient Minimum Voltage) as
the internal layer is broken down, resulng in the data logger reseng. Inserng the baeries in the data logger and leaving it
connected to a PC for about 30 seconds will remove this layer. Aer this, remove and re-install the baeries to reset the data
logger. Overall baery life will not be aected.
WARNING
Handle lithium metal baeries carefully, observe warnings on baery casing. Dispose of in accordance with local regulaons.
Green double ash
The data logger is not currently logging, but is primed to start at a later date
and me (delayed start)
Green single ash
The data logger is currently logging. No alarm
Green and Amber single ash
The data logger is full and has stopped logging. No alarm
Red single ash
The data logger is currently logging. Low alarm
Red and Amber single ash
The data logger is full and has stopped logging. Low alarm
Red double ash
The data logger is currently logging. High alarm
Red and Amber double ash
The data logger is full and has stopped logging. High alarm
Amber single ash
The baery is running low. Data logging will connue unl the baery voltage
drops below 2.8V
No LEDs ash
The data logger is stopped, the baery is empty or there is no baery
MEASUREMENT ACCURACY
± 0.0
± 0.5
± 1.0
± 1.5
± 2.0
-40 -200 20 40 60 80
± 0.0
± 0.5
± 1.0
± 1.5
-350 50 80
Temperature (°C)
Accuracy (°C)
± 0
± 2
± 4
± 6
± 8
± 10
0102030405060708090 100
Relative Humidity (%RH)
RH (%RH)
Maximal RH-accuracy at 25°C per sensor type
± 0.0
± 0.5
± 1.0
± 1.5
± 2.0
± 2.5
± 3.0
-40-20 020406080
Temperature (°C)
T (°C)
Maximal T-accuracy per sensor type
EL-USB-2-LCD
EL-USB-2+ EL-USB-2-LCD+