Care And Maintenance; Error Prevention - Conrad 67 21 82 Bedienungsanleitung

Care and Maintenance

Use a slightly damp, soft cloth to clean the display and the casing. Do not use any
solving or scrubbing detergent, as the latter can damage the display and the hou-
sing!
Never use any aggressive cleaning agents or solvents!
Remove immediately inefficient batteries in order to prevent a leakage of battery
acids.
The outdoors sensor has a "TEST" button. This button is only intended for service
purposes and must not be pressed during operation!
Always replace spent batteries completely with the same type.

Error prevention

The 433MHz technology makes it possible to transmit data over a short to medium
distance wireless. The transmitter uses a carrier frequency of 433MHz for transmitting
the information. The receiver filters this information out of the signal and analyses it.
This frequency is a general frequency, meaning anyone can use devices in this fre-
quency range without having to register them or passing an amateur radio technician
exam. This new technology enabled the production of many innovative products like
baby phones, LPD walkie-talkies, audio transmission system or this wireless pool
thermometer. Due to radio transmission, no cables are required. Due to the statutory
regulations, the transmission power and bandwidth is very low. Therefore, problems
may sometimes occur when using these devices:
1. Reception problems:
No display of the transmitted data on the receiver unit. Frequent data transmission
failure
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