6.
If
the
data
logger
is
disconnected,
check
the
tipping
mechanism
for
stiffness.
a.
Try
to
balance
the
bucket
in
its
cent
re
position.
It
should
be
extremely
difficult
or
impossible
to
balance.
b.
If
the
bucket
balances
easily,
closely
examine
the
tipping
bucket
assembly
for
dirt
or
wear
on
the
pivot
pin
and
bucket
tubs.
9.1.1 Internal lithium battery
An internal lithium coin cell battery powers the RainVUE-series during power loss of the main
12 V power source. The battery allows the RainVUE-series to capture rain events for 12 to 15 days
depending on battery age, temperature, and frequency of rain detections and SDI-12
measurement request.
The
M1!
and
IM1_005!
SDI-12 commands report the lithium battery voltage (see
13) and
(p. 16)). Replace the battery when voltage is approximately 2.7 VDC.
Campbell Scientific recommends replacing the battery every 2 to 3 years and after each loss of
power event. High temperature can reduce the battery life and low temperatures can decrease
battery capacity lowering available power and sensor runtime.
Remove the backup battery when the sensor is removed from service. Replace the battery when
the RainVUE-series is placed back in service.
Battery replacement procedure:
1. Loosen and remove the three base thumb screws then lift the funnel upward.
2. Use a Philips screwdriver to remove the four screws on the RainVUE-series interface.
3. Remove the interface cover.
RainVUE-Series SDI-12 Precipitation Sensors
22