User Manual for Model RHT10 Version 1.3 March 2007

10

Battery Replacement

It is highly recommended that the battery be replaced every 12 months, or prior to logging critical data.

The datalogger does not lose its stored readings when the battery weakens 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.

Use only 3.6V lithium batteries. Before replacing the battery, remove the datalogger from the PC. Follow

diagrammatic steps 1 through 4 below.

NOTE: Leaving the logger plugged into the PC USB port longer than necessary will cause some of the battery

capacity to be lost.

WARNING: Handle lithium batteries carefully, observe warnings on battery casing. Dispose of in accordance with

local regulations.

Sensor Reconditioning

Over time, the internal sensor may be compromised as a result of pollutants, chemical vapors, and other

environmental conditions which can lead to inaccurate readings. To recondition the internal sensor, please follow

the procedure below:

Bake the Logger at 80°C (176°F) at <5%RH for 36 hours followed by

20-30°C (70-90°F) at >74%RH for 48 hours (for re-hydration)

If permanent damage to the internal sensor is suspected, replace the Logger immediately to insure accurate

readings.

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