DH Instruments PPC4, Operation And Maintenance Manual

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PPC4™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company Page 152
IF
Purpose Increase the pressure quickly (fast).
Command “IF n ”
Classic
“IF= n ”
Arguments n: ‘0’ Closes the fast up valve.
‘1’ Opens the fast up valve.
Remarks Opening the fast up valve causes the pressure to increase quickly. Care must be used, as the
pressure will not stop increasing until the valve is closed, or the upper limit is exceeded.
Example
(enhanced)
Cmd sent:
Reply:
“IF 1”
“1” (no reply if IEEE-488)
Example
(enhanced)
Cmd sent:
Reply:
“IF? 1”
“1”
Example
(classic)
Sent:
Reply:
“IF=1”
“IF=1”
Errors ERR# 6: The n argument is a ‘0’ or a ‘1’.
See Also “DF”, “IS” , “DS”, “IP”, “DP”,
Figure 31
IP
Purpose Increase the pressure a given amount using the slow speed.
Command “IP n ”
Classic “IP= n ”
Arguments
n:
The increase in pressure desired (current pressure units). This can be from
0 to 2 % FS of the active range.
Remarks The slow speed will be used for a calculated amount of time (up to 5 seconds) to create the desired
change. The PPC4 will not attempt to control the pressure to a target, so the change in pressure
will be approximate. This is the equivalent of using

.
Example
(enhanced)
Cmd sent:
Reply:
“IP 2”
“2.000 kPa” (no reply if IEEE-488)
Example
(enhanced)
Cmd sent:
Reply:
“IP? 2”
“2.000 kPa”
Example
(classic)
Sent:
Reply:
“IP=2”
“2.000 kPa”
Errors ERR# 6: The n argument is not within given limits.
See Also “DP”, “IF” , “DF”, “IS”, “DS”
3.2.1
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 causes 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 exceeded.
Example
(enhanced)
Cmd sent:
Reply:
“IS 1”
“1” (no reply if IEEE-488)
Example
(enhanced)
Cmd sent:
Reply:
“IS? 1”
“1”
Example
(classic)
Sent:
Reply:
“IS=1”
“IS=1”
Errors ERR# 6:
The n argument is a ‘0’ or a ‘1’.
See Also “DS” , “IF” , “DF”, “IP”, “DP”
Figure 31