Teledyne 9110TH - Nitrogen Oxides Analyzer - Manual (Page 173)

Operating Instructions Model 9110TH NOx Analyzer
Teledyne Analytical Instruments 153
4.15.2.4. Data Types
Data types consist of integers, hexadecimal integers, floating-point numbers, Boolean
expressions and text strings.
 Integer data are used to indicate integral quantities such as a number of
records, a filter length, etc. They consist of an optional plus or minus sign,
followed by one or more digits. For example, +1, -12, 123 are all valid
integers.
 Hexadecimal integer data are used for the same purposes as integers. They
consist of the two characters “0x,” followed by one or more hexadecimal
digits (0-9, A-F, a-f), which is the ‘C’ programming language convention.
No plus or minus sign is permitted. For example, 0x1, 0x12, 0x1234abcd
are all valid hexadecimal integers.
 Floating-point numbers are used to specify continuously variable values
such as temperature set points, time intervals, warning limits, voltages, etc.
They consist of an optional plus or minus sign, followed by zero or more
digits, an optional decimal point, and zero or more digits. (At least one digit
must appear before or after the decimal point.) Scientific notation is not
permitted. For example, +1.0, 1234.5678, -0.1, 1 are all valid floating-point
numbers.
 Boolean expressions are used to specify the value of variables or I/O signals
that may assume only two values. They are denoted by the keywords ON
and OFF.
 Text strings are used to represent data that cannot be easily represented by
other data types, such as data channel names, which may contain letters and
numbers. They consist of a quotation mark, followed by one or more
printable characters, including spaces, letters, numbers, and symbols, and a
final quotation mark. For example, “a”, “1”, “123abc”, and “()[]<>” are
all valid text strings. It is not possible to include a quotation mark character
within a text string.
 Some commands allow you to access variables, messages, and other items,
such as DAS data channels, by name. When using these commands, you
must type the entire name of the item; you cannot abbreviate any names.
4.15.2.5. Status Reporting
Reporting of status messages as an audit trail is one of the three principal uses for the
RS-232 interface (the other two being the command line interface for controlling the
instrument and the download of data in electronic format). You can effectively disable
the reporting feature by setting the interface to quiet mode (see Communication Mode).
Status reports include DAS data (when reporting is enabled), warning messages,
calibration and diagnostic status messages. Refer to Appendix A-3 for a list of the