La Crosse Technology Wireless Temperature Station WS-7013TWC - Manual (Page 11)

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display the temperature on its LCD,
and the TX3UP will monitor the
temperature via a probe for use in
pools, spas, etc.
2. Note: When setting up multiple
units it is important to remove the
batteries from all existing units in
operation, then to insert batteries first
into all the Remote Control Sender
units, and in numeric sequence.
Second, install batteries into the
Indoor Temperature Station.
Transmission problems will arise if
this is not done correctly and if the
total time for set-up exceeds 6
minutes.
3. It is necessary to remove the batteries
from all units currently in operation.
4. Remove the battery covers to all
Remote Control Sender units.
5. Place all Remote Control Sender units
in a numeric sequential order.
6. In sequential order, install batteries
(follow the same battery installation