DH Instruments PPC2+, Manual

Page: 99 / 166

PPC2+™ Operation and Maintenance Manual
Page 91
©2001 DH Instruments, Inc.
DEVICE
This is an obsolete PPC2 Command.
Purpose PPC2+ does not support external devices so the “DEVICE” Command is not
supported. Will respond ERR# 9.
See None
DF
Purpose Decrease the pressure quickly.
Command “DF
n”
Classic “DF= n”
Arguments ‘0’
‘1’
Closes the fast down valve.
Opens the fast down valve.
Remarks Opening the fast down valve will cause the pressure to decrease quickly.
Example
(enhanced)
Cmd sent:
Reply:
“DF 1”
“1” (no reply if IEEE-488)
Example
(classic)
Sent:
Reply:
“DF=1”
“DF=1”
Errors ERR# 6: The
n argument is a ‘0’ or a ‘1’.
See Also Section 5.8.1.7
DP
Purpose Decrease the pressure slowly a given amount using the slow speed.
Command “DP n”
Classic “DP=
n”
Arguments n The decrease in pressure desired (current pressure units). This can
be from 0 to 2 % FS of the current RPT range.
Remarks The slow speed will be used for a calculated amount of time (up to 5 seconds) to
create the desired change. The PPC2+ will not attempt to control the pressure to a
target, so the change in pressure will be approximate.
Example
(enhanced)
Cmd sent:
Reply:
“DP 2”
“2.000 kPa”(no reply if IEEE-488)
Example
(classic)
Sent:
Reply:
“DP=2”
“2.000 kPa”
Errors ERR# 6: The n argument is not within given limits.
See Also None.
DPG
This is an obsolete PPC2 Command.
Purpose PPC2+ does not support external devices so the “DPG” command is not supported.
Will respond ERR# 9.
See None