DH Instruments PPCH, Руководство по эксплуатации и обслуживанию

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PPCH™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company Page 120
RETURN
Purpose Start a new pressure setting sequence equivalent to the “PS” command using the last target
pressure.
Command “RETURN”
Classic “RETURN”
Remarks
The “RETURN” program message starts a new pressure setting sequence using the current
settings and target pressure. Pressure control continues until a new target pressure is set,
the PPCH is put into LOCAL mode, or an “ABORT” program message is executed.
Example
(enhanced) Cmd sent:
Reply: “RETURN”
“1000.000 kPaa” (no reply if IEEE-488)
Example
(classic) Sent:
Reply: “RETURN”
“1000.000 kPaa”
Errors ERR# 6
ERR# 8
ERR# 12
ERR #18
ERR# 55
The target pressure is out of range.
Active external RPM4 timeout.
Pressure has exceeded maximum limits.
This command not valid in “rate” control mode.
Hardware malfunction, reservoir low.
See Also “PS“, “TP”
3.3.10
RL%
Purpose Read or set the ramp control mode rate ready limit.
Command
Query “RL% n ”
“RL%?”
Classic “RL%= n ”
“RL%”
Arguments n: The rate limit in % of the requested rate / sec.
Remarks The rate limit is used only in “ramp” control mode to determine ready criteria. It is in % of the
current rate target. If this program message is used to set the rate ready limit, the PPCH will
then indicate CUSTOM control settings.
Example
(enhanced) Cmd sent:
Reply: “RL% 10”
“10.0 %/s”(No reply from GPIB-488)
Example
(enhanced) Cmd sent:
Reply: “RL%? 10”
“10.0 %/s”
Example
(classic) Sent:
Reply: “RL%=10”
“10.0 %/s”
Errors ERR# 6 The argument was invalid.
See Also “RL”
3.2.2.5, 3.4.6.1