PRESSURE CONTROLLER operating manual
15
Engineering Units
The device’s units of measurement are handled in two ways:
Button engineering units
are the units of measurement on the front
display. For the standard pressure controller, the default units are PSIG
(gauge), PSIA (absolute), or PSID (differential). Low pressure controllers
may include default units of inH₂OG, inH₂OD, or torrA.
Device engineering units
are the units of measurement used for calcu-
lation and sent through a serial data connection.
Optionally, these may
be different from the displayed button engineering units
.
Selecting Engineering Units
If a parameter is already highlighted in the center of the screen, pressing
that measurement’s button again will bring up a menu to modify either
the button engineering units or the device engineering units.
If the device and button engineering units are the same
(below
left), the menu will offer to change button engineering units or device
engineering units. Device engineering units can also be set in the Basic
Configuration Menu (
If device and button engineering units differ
(below right), the menu
will offer to change button engineering units (
Set button eng units
), or to
match button units to device engineering units (
Show device eng units
).
This will show if the front display
units (button engineering units)
are
the same
as the serial data
units (device engineering units).
This will show if the front display
units (button engineering units)
are
different
than the serial data
units (device engineering units).
