Section 2: Description of MicroTSG
SBE 45
11
Sample Timing
The time to acquire the temperature and conductivity varies, depending on the
mode of operation.
Polled Sampling Mode
Polled Sampling Mode is in effect when:
•
PCB J1 jumper is set to Normal or Autopower,
AutoRun=N
, and
sampling is started with
Go
(if
SingleSample=Y
) or with a polled
sampling command
Time from end of take sample command to beginning of reply (seconds)
= (
NCycles
* 0.1336) + 0.459
Autonomous Sampling Mode
Autonomous Sampling Mode is in effect when:
•
PCB J1 jumper is set to Normal or Autopower,
AutoRun=Y
, and
SingleSample=N
,
or
•
PCB J1 jumper is set to Normal (pins 2 and 3),
AutoRun=N
,
SingleSample=N
, and sampling is started with
Go
Time to acquire temperature and conductivity (seconds)
= (
NCycles
* 0.1336) + 0.287
Serial Line Sync Mode
Serial Line Sync Mode is in effect when:
•
PCB J1 jumper set to Normal (pins 2 and 3),
AutoRun=Y
, and
SingleSample=Y
Time from wake-up to beginning of reply (seconds)
= (
NCycles
* 0.1336) + 1.643
Total Sampling Time
Once temperature and conductivity are acquired, the time to calculate the
desired parameters is not a function of the mode of operation:
•
Time to compute temperature = 8.8 msec
•
Time to compute conductivity = 15.4 msec
•
Time to compute salinity = 83 msec
•
Time to compute sound velocity = 35 msec
Total time required for sample
=
time to acquire temperature and conductivity
+ time to compute selected parameters
+ time to transmit computed parameters
Notes:
•
The time to transmit computed
parameters is dependent on baud
rate. See
Baud Rate, Cable
Length, Power, and Data
Transmission Rate
.
•
For autonomous sampling, if the
total time required for the sample
is greater than the user-input
sample interval (
Interval=
), the
MicroTSG begins the next sample
as soon as it finishes transmitting
the current sample.
Note:
See
Command Descriptions
in
Section 4: Setting Up MicroTSG
for descriptions of
AutoRun=
,
Go
,
SingleSample=
,
NCycles=
, and
Interval=
.
16
Содержание SBE 45 MicroTSG
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Страница 4: ...Manual Generation Date 13 February 2012 1 ...
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Страница 98: ...CALIBRATION SHEETS SBE 45 Temperature Calibration S N 0402 1 SBE 45 Conductivity Calibration S N 0402 2 95 ...
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Страница 118: ...6 Appendix I Example Conductivity Calibration Sheet 115 ...
Страница 119: ...7 Appendix II Example Temperature Calibration Sheet 116 ...
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