PPC2+™ Operation and Maintenance Manual
Page 95
©2001 DH Instruments, Inc.
IS
Purpose
Increase the pressure slowly.
Command
“IS
n”
Classic “IS=
n”
Arguments
n
‘0’ Closes the slow up valve.
‘1’ Opens the slow up valve.
Remarks
Opening the slow up valve will cause the pressure to increase slowly. Care must be
used, as the pressure will not stop increasing until the valve is closed, or the upper
limit is passed.
Example
(enhanced)
Cmd sent:
Reply:
“IS 1”
“1”(no reply if IEEE-488)
Example
(classic)
Sent:
Reply:
“IS=1”
“IS=1”
Errors ERR#
6:
The
n argument is a ‘0’ or a ‘1’.
See Also
Section 5.8.1.7, “UL”
ISO
This is an obsolete PPC2 Command.
Purpose
PPC2+ has a standard bypass isolation valve that automatically cuts off the PPC2+
internal bypass flow when PPC2+ is vented or setting zero absolute pressure.
See
Section 5.8.1.7
LL(=)
Purpose
Read or set the lower pressure limit for the current range. PPC2+ BG0002 model
only.
Command “LL
n”
Classic “LL=
n”
Arguments
n
The lower pressure limit for the current pressure range in the current
unit of measure. Value is always gauge pressure.
Remarks
The PPC2+ BG0002 has a lower limit for each of its ranges. New automated
pressure control targets can not be less than this value. If the pressure does exceed
the lower 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 below
the lower limit. Increases in pressure will be allowed. This feature should always be
used to prevent accidental over (under) pressure of a device under test.
Example
(enhanced)
Cmd sent:
Reply:
“LL -4”
“-4 kPa g”(no reply if IEEE-488)
Example
(classic)
Sent:
Reply:
“LL=-4”
“-4 kPa g”
See Also
Section 5.8.1.7, PPC2+ BG0002 Operation and Maintenance Manual Section 3.2.3,
“UL”
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