Campbell CS475 Specifikace stáhnout pdf (Strana 32)

Appendix B. Entering SDI-12 Commands/Changing Settings

TABLE B-1. SDI-12 Commands

Function SDI-12 Command

Address Query

?!

Send Identification

aI!

Acknowledge Active

a!

Change Address

aAb!

Where a is the current address and b is the

new address

Start Verification

aV!

Start Measurement

aM!

Start Measurement and

Request CRC

aMC!

Send Data

aD0!...aD9!

Additional Measurements

aM1!...aM9!

Additional Measurement and

Request CRC

aMC1!...aMC9!

Start Concurrent Measurement

aC!

Start Concurrent Measurement

and Request CRC

aCC!

Additional Concurrent

Measurements

aC1!...aC9!

Additional Concurrent

Measurements and Request

CRC

aCC1!...aCC9!

Start False Echo Learn

aXSFEL+n!

n=distance necessary to clear the obstruction

Set Power n Operation Mode

(ON, OFF, AUTO)

aXSPOM+n!

n=2 (auto), 1 (on), or 0 (off)

Get Power Operation Mode

(ON, OFF, AUTO)

aXGPOM!

2=auto; 1=on; 0=off

Get Water Conditions

aXGWC!

n=0 (auto), 1 (smooth) 2 (medium), or 3

(rough)

Set Water Conditions

Where n is the new Water

Condition

aXSWC+n!

n=0 (auto), 1 (smooth) 2 (medium), or 3

(rough)

Set Water Stage

Where n is the new Water

Stage

aXSS+n!

n=floating point number that is the initial

distance between the sensor and the water

surface.

Get Unit

aXGU!

0=meters; 1=feet

Set Unit

Where n is the new unit of

measurement

aXSU+n!

n= 0 (meters) or 1 (feet)

Reset Sensor

Resets the sensor to its factory

settings

aXRS!

0=reset unsuccessful; 1=reset successful

B-2

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