Precision Water Level Instrument
Unidata Manual 6293 - Precision Water Level Instruments Issue 2.1
17
The CRCed version of this command is also valid.
Note the valid addresses for the 6541B instrument are (ASCII) 0
Æ
z inclusive.
The
address of the instrument is set to a default value of 0 at delivery.
4.5.1 Wiring Connections
Terminal 8 SDI-12 Signal
Terminal 7 SDI-12 GND
4.5.2 Commands
The SDI-12 commands below are useful for communicating with the 6541B Water
Level Instrument.
Action
Command
(to 6541B)
Response (from 6541B)
Acknowledge
Active
a! a<CR><LF>
Send
identification
aI! a13Unidata
6541B
102<CR><LF>
13 ~ SDI12 Version 1.3
compliant
6541B ~ Product model
number
102 ~ Firmware version is
1.02
Change
Address
aAb! b<CR><LF>
Where “b” is the new address.
Address Query ?!
a<CR><LF>
Start
measurement
aM! a0001<CR><LF>
Send data
aD0!
a<value><CR><LF>
Continuous
Measurements
aR0! a<value><CR><LF>
