Sea-Bird Electronics SBE 38 Uživatelský manuál stáhnout pdf (Strana 57)

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

Moored Mode Setup Commands

Moored mode setup commands following MM apply to Moored Mode

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

MM Set 19plus V2 to Moored mode.

SampleInterval=x x= interval (seconds) between samples

(10 - 14,400 seconds).

NCycles=x x= number of measurements to take and

average every SampleInterval seconds.

Range 1 – 100; default 1. 19plus V2 takes

and averages NCycles samples (each

0.25 seconds apart) each SampleInterval

seconds; averaged data is stored in FLASH

memory and (if MooredTxRealTime=Y)

transmitted real-time.

MooredPumpMode=x x=0: No pump.

x=1: Run pump for 0.5 seconds before

each sample (typical for pumping through

conductivity cell only, with no auxiliary

sensors connected to plumbing).

x=2: Run pump during each sample

(typical for pumping through conductivity

cell and in-line auxiliary sensor).

DelayBeforeSampling=x x= time (seconds) to wait after switching

on external voltage and RS-232 sensors

before sampling (0-600 seconds). Default

0 seconds. Typical values if using:

- SBE 43 oxygen sensor – time is

dependent on membrane thickness and

on water temperature (see Pump

Operation – Moored Mode) . Use with

MooredPumpMode=2.

- Beckman- or YSI-type oxygen sensor –

120 to 180 seconds required to provide

time for sensor to polarize.

Use with MooredPumpMode=2.

- Sea Tech fluorometer - 15 seconds

required to provide time for sensor

to stabilize.

MooredTxRealTime=x x=Y: Output real-time data.

x=N: Do not.

Notes:

• Pump operation is affected by both

DelayBeforeSampling= and

MooredPumpMode=. See Pump

Operation – Moored Mode.

• NCycles=, DelayBeforeSampling=,

MooredPumpMode=, and

MooredTxRealTime= affect the

time required to sample. If the time

required to sample is too high, the

19plus V2 is unable to take the

required number of measurements

and do the calculations within

SampleInterval=. See Sample

Timing in Section 2: Description of

SBE 19plus V2.

• Power turn-on defined by

DelayBeforeSampling= does not

apply to the RS-232 Aanderaa

Optode, because turning on power

to the Optode causes it to sample.

The 19plus V2 turns on power to the

Optode when the 19plus V2 is ready

to acquire the Optode data.

Note:

The 19plus V2 requires verification

when MM 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

Example: If SampleInterval=20 and NCycles=4, every 20 sec 19plus V2 takes 4 measurements

(0.25 sec apart), averages data from 4 measurements, and stores averaged data in FLASH memory.

Notes:

• For 19plus V2 with optional Quartz

pressure sensor, NCycles= must be

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

increasing NCycles= reduces

measurement noise. See

Specifications in Section 2:

Description of SBE 19plus V2 to

determine resolution.

• 19plus V2 integrates for the Quartz

pressure sensor after NCycles=

measurements have been taken.

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