Fluke Hart Scientific 1575 Super-Thermometer User Manual page 99

7 Front Panel Operation
System Menu
the same as the sample interval set in SAMPLE TIMING (see Section 7.2.3.
Using AUTO will insure that you read every measurement and will read sam-
ples with a more precise interval. If the period is set to SET, the user must enter
a value, in seconds, that will be used to transmit measurements. If the period is
set to OFF, measurements will not be transmitted (unless requested using the
"tem" command, see Section 8.3). Data sampled to the serial port is formatted
the same as data recorded to disk. Figure 12 shows an example of how the data
might look. The example is with the PERIOD set to AUTO and TIME and
DATE ON (see below). The channel mode is set to ALT N with N=1 (see Sec-
tion 7.1.3). Each measurement value is preceded by the channel number.
DUPLEX determines whether commands received by the 1575/1590 will be
echoed back. If duplex is FULL, commands will be echoed back. If it is HALF
they will not.
LINEFEED determines whether a linefeed character will be transmitted at the
end of a line of data. Data transmitted from the serial port is always followed
by a carriage return. If you set the linefeed ON, a linefeed will also be transmit-
ted immediately after the carriage return.
The TIME and DATE parameters determine whether the current time and date
are transmitted along with measurements. The time can be set to 12-hour or
24-hour time format (Section 7.6.2.1).
The serial interface is configured for eight data bits, one stop bit, and no parity.
The PC or instrument connected to the serial port must have these same
settings.
7.6.4.2 IEEE-488
The IEEE-488 (GPIB) interface works very much like the serial communica-
tions. One advantage of the IEEE-488 bus over serial is that many devices can
be connected to a single cable. It is also faster than serial communications.
With IEEE-488, as with serial, the remote device can request measurement data
from the thermometer and can send commands to control its operation. (For a
list of commands and other details related to IEEE-488 communications, see
Section 8.) Parameters that control the action of the interface are set with the
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