SonTek/YSI
22
ADVField Operation Manual (September 1, 2001)
3.1.2. Data Acquisition Mode
Data acquisition mode indicates that the ADVField is involved in real-time data collection. Data
acquisition mode is entered from the command mode with the command
Start
. In data acquisi-
tion mode, the ADVField ignores all deployment parameters (§3.7) and proceeds with data col-
lection based on the setup parameters (§3.6). During real-time data collection, data is output both
through the ADVField serial port and as analog output voltages, but cannot be written to the op-
tional internal recorder. You can exit the data acquisition mode and return to the command mode
by sending a
BREAK
or by using the run-time command
+++
.
3.1.3. Deployment Mode
Deployment mode is used for autonomous data collection. Deployment mode is entered from
command mode using the command
Deploy
. In deployment mode, the ADVField uses both the
setup and deployment parameters (§3.6 and §3.7) to configure data collection. You can exit the
deployment mode and return to the command mode by sending a
BREAK
or by using the run-time
command
+++
. In deployment mode, data is written to the internal recorder, and the burst header
is output over the serial port.
3.1.4. Sleep Mode
The sleep mode is used to conserve power when the instrument is not in use. To manually enter
this mode, use the command
PowerOff
. The ADVField will also enter the sleep mode automati-
cally if left inactive in command mode for more than five minutes. In sleep mode, the ADV uses
less than 1 mW of power. You can exit sleep mode and enter command mode by sending a
BREAK
. When in sleep mode, the ADV will not perform or respond until a
BREAK
is received
(unless ADV power is cycled; see §3.1.5). If the ADV is being powered by batteries, you should
place the ADV in sleep mode before storing the instrument to prevent draining the batteries.
3.1.5. System Responses to Power Application and Break Signals
The following items should be kept in mind regarding the application/removal of power and re-
garding ADV reactions to
BREAK
signals.
• The response of the ADV to a power-up depends on whether it has an internal recorder.
○ Without Internal Recorder – The ADV will immediately enter deployment mode and start
data collection when power is applied.
○ With Internal Recorder – The ADV will enter the last mode it was in before power was
lost/removed. If the ADV was previously in:
- Command mode or sleep mode
: The ADV will re-enter command mode.
- Data acquisition mode
: The ADV will enter data acquisition mode and immediately
start real-time data collection.
- Deployment mode
: The ADV will start a new deployment using the stored deployment
and setup parameters with the exception of
StartDate
and
StartTime
. These parame-
ters are ignored and the new deployment will begin immediately. This is a safety feature
to avoid the loss of data in the event of a clock reset caused by a problem with the real-
time clock backup battery.
• After changing batteries, establish communication with the ADV and place it in sleep mode to
prevent draining the batteries.
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