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Campbell Scientific CS700 Tipping Bucket Rain Gage and CS700H Heated Rain Gage User Manual

Page 34

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Appendix A. CS700H Operation

TABLE A-4. SDI-12 V1.2 COMPLIANT COMMAND SET –

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Name Command

Response

Break

Continuous
spacing for
at least 12
milliseconds

None

Acknowledge
Active

a!

a

Send
Identification

aI!

allccccccccmmmmmmvvvxxx...xx
(see Note 1.)

Change
Address

aAb!

b

Address
Query

?!

a

Start
Measurement

aM!

atttn a0009 => (9 measurements in
0 secs)

Send Data

aD0!

(Response from Measurement and Concurrent
commands; see to Note 4)
a …..
value1 = Ambient temperature (°C or °F)
value2 = Block temperature (°C or °F)
value3 = Units (0=°C : 1=°F)
value4 = 0=no snow : 1=snow detected
value5 = 0=Snow sensor disabled : 1=enabled
value6 = 0=Heater Off : 1=Heater elements on
value7 = 0=Automatic Control : 1=Manual
Control
value8 = 0=Cycle Disabled : 1=Cycle Enabled
value9 = Low Power Heater cycle time left
(mins)

Continuous
Measurement

aR0!

Same reply as the D command

Start
Verification

aV!

Atttn (see Note 2)

Start
Concurrent
Measurement

aC!

atttnn a00009 =>(9 measurements
in 0 secs)

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