When using the
M!
command, the data logger waits for the time specified by the sensor, sends
the
D!
command, pauses its operation, and waits until either it receives the data from the sensor
or the sensor timeout expires. If the data logger receives no response, it will send the command a
total of three times, with three retries for each attempt, or until a response is received. Because of
the delays this command requires, it is only recommended in measurement scans of 20 seconds
or more.
The
C!
command follows the same pattern as the
M!
command with the exception that it does
not require the data logger to pause its operation until the values are ready. Rather, the data
logger picks up the data with the
D!
command on the next pass through the program. Another
measurement request is then sent so data is ready on the next scan.
8.5 Updating the operation system (OS)
The SDI-12 extended command
XLOADOS!
sends the new operating system (OS) to the sensor.
NOTE:
Only the CR6, CR1000X, and CR300-series data loggers are compatible with the
XLOADOS!
functionality.
Verify
that
the
data
logger
has
been
updated
to
the
latest
OS
to
ensure
compatibility.
If
a
compatible
data
logger
is
not
available
to
update
the
sensor,
send
the
sensor
to
the
factory
to
have
Campbell
Scientific
update
the
OS.
A
returned
material
authorization
(RMA)
and
completion
of
the
“Statement
of
Product
Cleanliness
and
Decontamination”
form
are
required.
Refer
to
the
bout this manual
page
at
the
front
of
this
manual
for
more
information.
The
data
loggers
need
the
following
OS
versions:
l
CR6: OS 11 or newer
l
CR1000X: OS 5.0 or newer
l
CR300 series: OS 10.05 or newer
The
XLOADOS!
OS update process requires access to the data logger terminal. Campbell
Scientific
Device Configuration Utility
is recommended.
Although this update may be performed remotely, if the sensor is not communicating with the
data logger, it must first be power cycled to regain communication and accept the new OS.
SnowVUE 10 Sonic Ranging Sensor
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