Martel Electronics EL-USB-2 - Manual (Page 4)

4 Martel Electronics Corporation DT-EL-USB2
103 (4.06)
26.4
(1.04)
DIMENSIONS
All dimensions in mm (inches)
Internal Relative Humidity and Temperature Sensor Location
EL-USB-2
Humidity, Temperature and Dewpoint USB Data Logger
WARNING: Handle lithium batteries carefully, observe warnings on battery casing.
Dispose of in accordance with local regulations.
BATTERY REPLACEMENT
RECONDITIONING PROCEDURE
MEASUREMENT ACCURACY
We recommend that you replace the battery every 12 months, or prior to logging critical data.
The EL-USB-2 does not lose its stored readings when the battery is discharged or when the battery is replaced; the
data logging process will however be stopped and cannot be re-started until the battery has been replaced and the
logged data has been downloaded to PC.
Only use 3.6V 1/2AA lithium batteries. Check with your supplier that the battery you are ordering is 'press fit' and
is not fitted with solder tags. Before replacing the battery, remove the EL-USB-2 from the PC.
Exposure of the internal sensor to chemical vapors may interfere with the internal sensor and cause inaccurate
readings to be logged. In a clean environment, this will slowly rectify itself. However, exposure to extreme
conditions or chemical vapors will require the following reconditioning procedure to bring the internal sensor back
to calibration state.
80°C (176°F) at < 5%RH for 36h (baking) followed by
20-30°C (70-90°F) at > 74%RH for 48h (re-hydration)
High levels of pollutants may cause permanent damage to the internal sensor.
Note:
Leaving the EL-USB-2 plugged into the USB port for longer than necessary will cause some of the battery capacity
to be lost.