DH Instruments PPC2+, Manual

Page: 120 / 166

PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc.
Page 112
UL
Purpose Read or set an upper limit for the current RPT and range.
Command
Query
“UL n”
“UL”
Classic “UL= n”
“UL”
Arguments n: The upper limit pressure in the current pressure units.
This value is always in absolute units if the RPT is absolute,
or gauge units if the RPT is gauge.
Remarks The PPC2+ has an upper limit for each range of each RPT and for each
measurement mode (gauge and absolute). New automated pressure control targets
can not be greater that this value. If the pressure does exceed the upper limit, the
pressure display will flash, and the unit will stop generating. Manual increases in
pressure will not be allowed as long as the pressure is above the upper limit.
Decreases in pressure will be allowed. This feature should always be used to
prevent accidental over pressure of a device under test.
Example
(enhanced)
Cmd sent:
Query reply:
“UL 1000”
“1000.00 kPaa”
Example
(classic)
Sent:
Reply:
“UL=1000”
“1000.00 kPaa”
Errors ERR# 6: The argument is out of range.
See Also Section 3.2.4