Xylem YSI H-3553T, Owner'S Manual

Page: 25 / 36

Setup & Operation
23
H-3553T Combo Bubbler Setup Menu SDI-12 Interface
P – Advanced Options Command: aXWILn.nn!
: Response: a0021
Advanced Options Menu
Command: aXRIL!
F – 4-20 mA Output Response: a0011
: Command: aD0!
4-20 mA Output Setup Menu Response: a + n.nn
N – Min Stage: x.xx
Enter 4 - 20mA Min Stage [ n.nn ]
Table 4-17: Change the H-3553T 4-20 Milliamp Min Stage
4-20 Milliamp Max Stage
The 4-20 milliamp max stage value should be the highest the stage gets at the installed site. When the stage
equals this value or greater the 4-20 milliamp output will be 20.0 milliamps, the max.
The H-3553T 4-20 milliamp max stage default value is set to 20. There is no limit to this value, but keep in mind
that the smaller the overall range of the 4-20 stage scalar, which is the min to the max stage, the more accurate
the 4-20 milliamp output will be. To change the 4-20 milliamp max stage using the RS-232 main menu, press
the ‘P’ key to enter the “Advanced Options” menu and then press the ‘F’ key to enter the “4-20mA Output
Setup” menu. Then press the ‘X’ key in this menu, enter in the new “Max Stage ” value and press the ‘Enter’ key.
To change the H-3553T 4-20 milliamp max stage using the SDI-12 interface, send the “aXWIHn.nn!” SDI-12
extended command. The response should be “a0021”, which means that it could take 2 seconds to complete
the command and then it will put 1 data value in the buffer. To check the new 4-20 milliamp max stage, send
“aXRIH!” command and wait the responded time. Then send the “aD0!” command to read back the new
written 4-20 milliamp max stage. Note Table 4-18, the ‘a’ is the current SDI-12 address of the H-3553T and the
‘x.xx’ is the current 4-20 milliamp max stage and the ‘n.nn’ is the desired 4-20 milliamp max stage.
H-3553T Combo Bubbler Setup Menu SDI-12 Interface
P – Advanced Options Command: aXWIHn.nn!
: Response: a0021
Advanced Options Menu
Command: aXRIH!
F – 4-20 mA Output Response: a0011
: Command: aD0!
4-20 mA Output Setup Menu Response: a + n.nn
X – Min Stage: x.xx
Enter 4 - 20mA Max Stage [ n.nn ]
Table 4-18: Change the H-3553T 4-20 Milliamp Max Stage