Xylem H-3553 - Manual (Page 18)

Note Table 4-7, the ‘a’ is the current SDI-12 address of the H-3553 and the ‘xxxx’/’x.xxx’ is the current units/
slope of the H-3553 and the ‘nnnn’/’n.nnn’ is the desired new units/slope.
SETUP & OPERATION
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H-3553 Combo Bubbler setup menu sDI-12 Interface
U - Units: xxxx Command: aXWSn.nnn!
Stage Units: [nnnn] Response: a0021
L - Slope: x.xxx Command: aXRS!
Enter Slope Value: [n.nnn] Response: a0011
Command: aD0!
Response: a + n.nnn
Table 4-7: Change the H-3553 Units / Slope
Set Current Stage
Set current stage is setting the stage to the actual measured or surveyed value, this could include the elevation
or not. Normally, the current stage value comes from a wire weight reading or a surveyed staff gauge reading.
Setting the current stage in the H-3553 forces a new measurement and then compares the result of that
measurement with the desired current stage and then calculates and sets the stage offset. To set the current
stage using the RS-232 main menu, press the ‘S’ key, enter in the current “Stage” and then press the ‘Enter’
key.
To set current stage using the SDI-12 interface, send the “aXSCSn.nn!” SDI-12 extended command. The
response should be “a0061” which means that it will take 6 seconds to complete the command and then it will
put 1 data value in the buffer. To check if the stage was set correctly, send the “aM!” measurement command,
wait the responded time and then send the “aD0” and verify the stage level value. Note Table 4-8, the ‘a’ is
the current SDI-12 address of the H-3553 and the ‘x.xxx’ is the current measured stage of the H-3553 and the
’n.nnn’ is the desired new current stage.
H-3553 Combo Bubbler setup menu sDI-12 Interface
S - Stage: x.xxx Command: aXSCSn.nnn!
Enter Stage Value: [n.nnn] Response: a0061
Command: aM!
Response: a0066
Command: aD0!
Response: a+n.nnn+...
Table 4-8: Set the H-3553 Current Stage
Note: The last section of this chapter discusses the “Set Current Stage” section as the most used option.