Chapter 2
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BB6032-14
Photoacoustic Gas Monitor
LumaSense Technologies
1314i / 1412i / 1512 / 3434i
Page 23 of 81
Description
MESSAGE
This is the interface message
HS
This is the “Header Separator”. A <SPACE> is
always used, and must be inserted between the
header the first parameter field.
PARAMETER Some message and request commands require
some parameters to be sent with them.
TE
The default terminator for the Monitor is <LF>.
Note: when programming the Monitor via the
interface, it sends data as a series of one or more
text lines. Each of these lines is terminated by a
“text line terminator”. This can be changed using
the Setup command. There are three possibilities:
<LF>, <CR> or <CR><LF>. When the Monitor
has finished sending data (all the text lines) the
final terminator is sent. This is the same as the
“Message Terminator”.
BLOCK DATA
This defines the way in which block data is
transferred to the Monitor. The block data fields
conform to the general block data format as
defined by ANSI/EEE Standard 488.2. It takes the
form:
#C n..n [n..n data bytes]
C gives the number of characters in the following
block length, and is an integer between 1 and 9
inclusive. e.g. #4 1200 [1200 data bytes]
NRX
These are numbers according to the IEEE–488
standards, where x can be 1, 2, or 3. NR1 is
always an integer. NR2 is real without exponential.
NR3 is real with an exponential.
Protected xx
Some messages are protected. This means the
message will only be recognised by the Monitor if
it is “unlocked”. Unlocking the Monitor is done
using the Extended_Control message, see
Note: you must unlock the message each time it
is sent.
Table 2.2 Key to Syntax Messages
