Sea-Bird Electronics SBE 38 Manual de usuario descargar pdf (Pagina 56)

Manual revision 006 Section 4: Deploying and Operating SBE 19plus V2 SBE 19plus V2

Profiling Mode Setup Commands

Profiling mode setup commands following MP apply to Profiling mode

only, and have no effect on operation if the 19plus V2 is in Moored mode.

MP Set 19plus V2 to Profiling mode.

NAvg=x x= number of samples to average

(default 1, maximum 32,767). 19plus V2

samples at 4 Hz (every 0.25 seconds) and

averages NAvg samples; averaged data is

stored in FLASH memory and transmitted

real-time.

MinCondFreq=x x= minimum conductivity frequency (Hz)

to enable pump turn-on, to prevent pump

from turning on before 19plus V2 is in

water. Pump stops when conductivity

frequency drops below

MinCondFreq=.

19plus V2 Configuration Sheet lists

uncorrected (raw) frequency output at

0 conductivity. Typical value (and factory-

set default) for

MinCondFreq= for salt

water and estuarine application is:

(0 conductivity frequency + 500 Hz).

Typical value for

MinCondFreq= for fresh

water applications is:

(0 conductivity frequency + 5 Hz).

PumpDelay=x x= time (seconds) to wait after minimum

conductivity frequency (

MinCondFreq=) is

reached before turning pump on. Pump

delay time allows time for Tygon tubing

and pump to fill with water after

19plus V2 is submerged.

Pump starts

PumpDelay= seconds after

conductivity cell’s frequency output is

greater than

MinCondFreq=.

Typical value 30 - 45 seconds; range

0 – 600 seconds. Default 60 seconds.

AutoRun=x x=Y: Start logging automatically when

external power applied; stop logging when

external power removed. Magnetic switch

position has no effect on logging.

x=N: Wait for command when external

power applied. Default.

IgnoreSwitch=x x=Y: Do not start or stop logging based on

position of magnetic switch. Use

StartNow, StartLater, and Stop to

control logging.

x=N: Do not ignore magnetic switch

position. Logging controlled by switch

position. Default.

Note:

The 19plus V2 requires verification

when MP is sent. 19plus V2 responds:

this command will change the

scan length and/or

initialize logging. Repeat

the command to verify.

Type the command again and press

the Enter key to proceed.

The 19plus V2 responds:

Scan length has changed,

initializing logging

Note:

See Pump Operation – Profiling Mode.

Note:

To start sampling immediately after

you send AutoRun=Y (if you were

performing setup on external power):

• Send QS to put 19plus V2 in

quiescent (sleep) state, and then

turn external power off and then on

again. or

• Send StartNow.

Example: 19plus V2 samples every 0.25 seconds. If NAvg=2, 19plus V2

averages data from 2 samples (= 1 averaged data sample per 0.5 seconds), stores

averaged data in FLASH memory, and transmits averaged data real-time.

Note:

For a 19plus V2 with optional Quartz

pressure sensor, NAvg= must be an

even number (2, 4, etc.); increasing

NAvg= reduces the measurement

noise. See Specifications in Section 2:

Description of SBE 19plus V2 to

determine resolution.

Note:

If IgnoreSwitch=N: Sending Stop only

stops logging briefly, and then logging

resumes. To stop logging, slide the

magnetic switch off or send <CTRL Z>.

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