www.lascarelectronics.com
Issue 1 10/2019 Page 6 of 6
EL-SIE-2+
High Accuracy Temperature and Humidity
USB Data Logger, EasyLog Cloud Compatible
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.
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.
High levels of pollutants may cause permanent damage to the internal sensor.
BATTERY INFORMATION
We recommend that you replace the batteries annually, or prior to logging critical data. Use only AAA 1.5V alkaline batteries. Before
replacing the batteries, disconnect the logger from your computer.
The logger does not lose its stored data readings when the batteries are discharged or replaced. However, the logging process will stop
and will not resume until the batteries 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 batteries, which can raise the
temperature of the logger slightly. It will return to normal shortly after disconnection.
