DH Instruments FPG8601, Руководство по эксплуатации и обслуживанию

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FPG8601™/VLPC™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 102
6.8.2.6.7 IEEE-488 interface
IEEE-488, also known as GPIB (General Purpose Interface Bus), is a popular
instrument interface protocol. This interface allows a single IEEE-488 controller
card to simultaneously interface with up to 15 instruments. Each instrument must
be set to an independent IEEE-488 address from 1 to 30. The controller card
also has an address that is used when multiple IEEE-488 cards are installed in
the PC. However, this is a rare case.
FPG Tools
is designed to function with National Instruments IEEE-488 cards
only. Drivers for this card are built into the program. Other cards will not work
with FPG Tools even if they work in other software packages.
6.9 [UNITS]
The selection of the FPG display units and measurement mode are made using the
[Units]
menu. A list
of standard units are available and up to 10 user defined units can be created and used by FPG Tools.
The active pressure unit will have a check next to it in the list. When a new unit is selected, the effect will
occur immediately following the next pressure display update. The FPG pressure as well as any DUT
pressure will display in the selected unit. FPG Tools automatically converts any DUT's pressure output
unit to the selected unit. Pressure data logged in data files is also logged in the selected pressure unit.
Conversion factors for each pressure unit are listed in Section 11.2.
6.9.1 [USER DEFINED UNITS]
All user defined units display as a sub menu to the
[User Defined Units]
menu option.
Select these units in the same fashion as standard units. When a user defined unit is
selected, the unit displays at the bottom of the standard unit list with a check next to it.
Create, edit and delete user defined units by using the
[Manage User Defined Units]
menu choice. When this option is selected, the
<User Defined Units Setup>
form displays.
Up to 10 units can be created. Use the scroll bar to select an existing unit for edit, or press
the
[New]
toolbar button to create a new unit. Enter a unique
<Unit Label>
that accurately
describes the unit. Then enter the unit conversion factor required to convert to the new unit
from Pa (Pascal). The entered pressure unit divided by the conversion factor should yield a
pressure in Pa. Finally, select a display resolution appropriate for the new unit.
User defined units require a unique name to prevent confusion with other pressure units.
Figure 57. <User Defined Unit Setup>