Lascar EL-SIE-2+ - Operating Conditions and Battery; Humidity Sensor Response and Sensitivity; Battery Replacement and Power

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Issue 1 10/2019 Page 6 of 6
EL-SIE-2+
High Accuracy Temperature and Humidity
USB Data Logger, EasyLog Cloud Compable
When tracking changes in ambient condions, the response me 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 calibrang the product) it is advised
that you leave the unit for up to four hours to ensure that it has enough me to sele at the new level.
It is worth remembering that the value of relave humidity is of course sensive to temperature variaon. As an example, at a relave
humidity of ~90%RH at ambient temperature, a variaon in temperature of 1°C will result in a change of up to -5%RH. Therefore when
comparing mulple devices or calibrang them, any temperature variaons must be considered.
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 volale 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
informaon, please contact your local Lascar Electronics oce.
High levels of pollutants may cause permanent damage to the internal sensor.
BATTERY INFORMATION
We recommend that you replace the baeries annually, or prior to logging crical data. Use only AAA 1.5V alkaline baeries. Before
replacing the baeries, disconnect the logger from your computer.
The logger does not lose its stored data readings when the baeries are discharged or replaced. However, the logging process will stop
and will not resume unl the baeries are replaced and the logger is connected to your computer and the logger is started.
Note that while the logger is plugged into a computer it draws power from the USB port instead of the baeries, which can raise the
temperature of the logger slightly. It will return to normal shortly aer disconnecon.