Campbell CRVW3, Product Manual, Page: 59 / 93

Radio start (power-on) time 00:00
Radio-on duration 15 minutes
Repeat radio-on cycle Every 6 hours
When the shut-off time is reached, the radio will stay on long enough to complete any current
transactions, then turn off.
A USB cable connected to the CRVW3 device will override the Radio Power Schedule by turning
on the radio and keeping it on for as long as the cable is connected.
When the radio has been off for long periods of time, issues such as PakBus discovery time
should be considered before making a radio connection to the device, such as
automatic/scheduled collection from within LoggerNet .
Using the Radio Power Schedule tab is especially important for a CRVW3–RF451/RF452, as the
RF451/RF452 radio requires much more power than the RF407 option.
For the CRVW3–RF451/RF452, the RF Transmit Power setting should be chosen to provide for
stable communications at the lowest possible level that works properly to conserve power. See
the RF451/RF452 manual for more information
https://s.campbellsci.
eu
/documents/us/manuals/rf451.pdf .
Similarly, the Radio TX Power Level setting on the CRVW3–RF407 should be strategically chosen
to conserve power while still allowing robust communications. See the RF407 manual for more
information https://s.campbellsci.
eu
/documents/us/manuals/rf407-series.pdf .
8.10 Sealing the CRVW3 enclosure
Once you have completed the installation of the CRVW3 and confirmed proper measurement
and communications functionality, seal the enclosure. Proper enclosure sealing helps to avoid
unwanted entry of water or humid air and provides isolation from other environmental factors.
1. Ensure the enclosure is mounted to minimize water exposure to the sensor cable entries,
antenna connector, and ground lug. Typically, these items should face downward.
2. Ensure that the cable entry points are tightened properly.
3. Ensure that the humidity monitoring card and desiccant are in place. The CRVW3 enclosure
includes a small vent to allow for changes in pressure. A patch prevents water from
entering the enclosure through the vent.
4. Ensure that the lid closes properly and secure the latch. A padlock can be used to secure
the enclosure.
CRVW3 3-Channel Vibrating-Wire Data Logger 52