14-20 SDI-12 Operations
XL™ Series
14.7.5 Measure Command
The Measure Command causes a measurement sequence to be performed. Data values generated
in response to this command are stored in the sensor's buffer for subsequent collection using "D"
commands. The data will be retained in the sensor until another "M" or "V" command is
executed.
Command
Response
Description
-------------
----------------------
------------------------------------
"aM!"
"atttn<cr><lf>"
Initiate measurement
"aM1!"
"atttn<cr><lf>"
Additional measurement commands
Where:
a
Is the sensor address ("0" to "9", "A" to "Z", or "*").
M
(or M1) are upper-case ASCII characters.
ttt
Is a three digit integer (000-999) specifying the maximum time, in seconds, the
sensor will take to complete the command and have measurement data available
in its buffer.
n
Is a single digit integer (0-9) specifying the number of values that will be placed in
the data buffer. If "n" is zero (0), no data will be available using subsequent "D"
commands.
Upon completion of the measurement, a service request "a<cr><lf>" is sent to the data recorder
indicating the sensor data is ready. The data recorder may wake the sensor with a break and
collect the data any time after the service request is received or the specified processing time has
elapsed.
The following table lists the measure commands supported by the
W
ATER
LOG
H-350XL™ and
®
the responses from the sensor.
Summary of Contents for H-350XL
Page 1: ...XL Series Models H 350XL H 500XL H 510XL H 522 H 522 Plus Owner s Manual ...
Page 30: ...2 16 Hardware Options and Installation XL Series ...
Page 42: ...3 12 Using The Built In Keypad Display XL Series ...
Page 46: ...4 4 PC Menu Interface Operation XL Series ...
Page 58: ...5 12 Miscellaneous System Setup XL Series ...
Page 66: ...6 8 Serial Port Options XL Series ...
Page 74: ...7 8 System Configuration Files XL Series ...
Page 84: ...8 10 System Status Menus Options XL Series ...
Page 88: ...9 4 Scanning Options XL Series ...
Page 156: ...15 12 Logging Options XL Series ...
Page 198: ...16 42 Operation with the GOES Radio XL Series ...
Page 216: ...19 6 Alarm Call Out XL Series ...
Page 234: ...21 8 Operation with the H 355 Smart Gas System XL Series ...
Page 246: ...22 12 Functions XL Series ...