Xylem YSI H-3553T, Руководство пользователя

Страница: 20 / 36

Note: This averaging time does not take into account the time it takes to make an atmospheric reading.
Therefore, always add about 4 more seconds to the averaging time to calculate how long the full measurement
cycle can take.
SETUP & OPERATION
18
H-3553T Combo Bubbler Setup Menu SDI-12 Interface
P – Advanced Options Command: aXWATn!
: Response: a0021
Advanced Options Menu Command: aXRAT!
T – Averaging Time: x Response: a0011
Averaging Time [ nnn ] Command: aD0!
Response: a + nnn
Table 4-10: Change the H-3553T Stage Averaging Time
RS-232 Stage Digits
The RS-232 stage digits are the setting that determines how many digits are displayed to the right of the
decimal place for the measured value when printed out the RS-232 port. Normally, two digits to the right of
the decimal place is the standard when measuring stage in feet.
The H-3553T RS-232 stage digits default is 2. To change the “Stage Digits” using the RS-232 main menu, press
the ‘D’ key, enter in the new stage digits and then press the ‘Enter’ key.
To change the H-3553T RS-232 stage digits using the SDI-12 interface, send the “aXWSDn!” SDI-12 extended
command. The response should be “a0021” which means that it will take 2 seconds to complete the command
and then it will put 1 data value in the buffer. To check the stage digits and verify it was written correctly send
“aXRSD!” and wait the responded time. Then send the “aD0!” command to read back the new stage digits.
Note Table 4-11, the ‘a’ is the current SDI-12 address of the H-3553T and the ‘x’ is the current stage digits of
the H-3553T and the ‘n’ is the desired new stage digits.
H-3553T Combo Bubbler Setup Menu SDI-12 Interface
D - Digits: x Command: aXWSDn!
Stage Digits: [n] Response: a0021
Command: aXRSD!
Response: a0011
Command: aD0!
Response: a+n
Table 4-11: Change the H-3553T RS-232 Stage Digits