DH Instruments GFS2102, Руководство по эксплуатации и обслуживанию, Страница: 106 / 206

GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 90
Figure 57. Direct Remote Communication
Select an <Interface> and enter the necessary interface settings. Enter the command to be sent
in the command field. Clicking [Send] or pressing the [Enter] key, causes the command to be
sent using the current interface setup. Results and return strings are displayed in the white
portion of the form on the bottom of the display. These return strings are logged as output and
are not unmodified. The communications time-out is fixed at 10 seconds. A time-out is indicated
by displaying
<INTERFACE ERROR> . If the command does not have a response or the target
communications device does not normally respond to commands, click the <Send Only> check
box or GFS Tools will expect a response and time-out if none is received. Commands sent are
automatically added to the drop down <Command> list; the list is cleared each time the Direct
Remote Command option is selected.
Some RS232 devices automatically output data without requiring a command response pair. To
test these interfaces, check the
<Poll Interface> option. When active, this feature polls the
selected RS232 port and automatically log any response. After a command has been issued, the
selection can be toggled without any other required actions.
A mechanism is provided to send specific data bytes to a device. Enter the text “ BYTE:= ”
followed by a series a data bytes (0 – 255) separated by spaces. The numeric values are
converted to a sequence of characters and sent to the remote device. Make sure that decimal
values are entered and not hex (255 not FF). For example, enter the command “BYTE:= 2 27”
to send the characters 2 and 27 (Hex 02, 1B). Most devices that require specific byte data in this
way do not use command or response terminators.
5.2.5 [PROCESS GAS EDITOR]
The Process Gas Editor is a stand alone program that is used to manage K-Factors and DUT
models and manufacturers. Like the Unit of Measure Converter , the Process Gas Editor has
its own on-line help and is available in the GFS Tools program group and in the [Tools] menu.
Refer to the on-line help in the Process Gas Editor for details on using this program.
Defining specific gas conversion information based on gas and manufacturer simplifies the
DUT and Support Device setups.
GFS Tools automatically obtains the correct K-Factor