DH Instruments PPCH-G, Руководство по эксплуатации и обслуживанию

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PPCH-G™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 98
DP
Purpose Decrease the pressure slowly by the requested amount.
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 active range.
Remarks The down control valve will be used to decrease the pressure the requested amount at a rate
of 0.2 % FS/sec. The PPCH-G controls pressure up to the target and then stops, so the
change in pressure will be approximate.
Example
(enhanced) Cmd sent:
Reply: “DP 20”
“20 kPa”
(no reply if IEEE-488)
Example
(enhanced) Cmd sent:
Reply: “DP? 20”
“20 kPa”
Example
(classic) Sent:
Reply: “DP=20”
“20 kPa”
Errors ERR# 6: The n argument is not within given limits.
See Also “IP”, “DS”, “IS”, “DF”, “IF”
3.4.3, 3.1.3
DRV
n
Purpose Read or set the status of external electrical drivers.
Command
Query “DRV n x ”
“DRV n ?”
Classic “DRV n=x ”
“DRV n ”
Arguments n:
x:
The driver to operate. This can be from 1 to 8.
The state to change the driver to; ‘0’ to de-activate it, ‘1’ to activate it.
Remarks The PPCH-G control has eight optional external drivers.
Example
(enhanced) Cmd sent:
Reply: “DRV1 1”
“1”
(No reply if GPIB-488)
Example
(enhanced) Cmd sent:
Reply: “DRV2? 1”
“1”
Example
(classic) Sent:
Reply: “DRV1=1”
“DRV1=1”
Errors ERR# 6: The n or x arguments are not within given limits.
See Also 3.4.7
DS
Purpose Decrease the pressure slowly.
Command “DS n ”
Classic “DS= n ”
Arguments ‘0’
‘1’
Stops the pressure generation.
Starts a descending generation at a slow fixed rate..
Remarks The down control valve is used to establish a fixed rate of 0.2 % FS/sec. The valve is closed
as the pressure approaches the target.
Example
(enhanced) Cmd sent:
Reply: “DS 1”
“1”
(no reply if IEEE-488)
Example
(enhanced) Cmd sent:
Reply: “DS? 1”
“1”
Example
(classic) Sent:
Reply: “DS=1”
“DS=1”
Errors ERR# 6: The n argument is a ‘0’ or a ‘1’.
See Also “IF” , “DF”, “IS”, “IP”, “DP”,
3.2.1
ERR
Purpose Read the new available error message from the Error Queue.
Query “ERR?”
Classic “ERR”
Remarks
This program message obtains additional details about an error that has occurred. If the user
receives an “ERR# nn” reply, or the enhanced mode is enabled using the IEEE-488 interface
and an error has been detected, the error is put into a “FIFO” (first in first out) error queue.
The “ERR” program message pulls and replies the oldest error message available. “OK” is
replied if there are no error messages left.
Example
(enhanced): Query sent:
Reply: “ERR?”
“Numeric argument missing or out of range”
Example
(classic) Sent:
Reply: “ERR”
“Numeric argument missing or out of range”
See Also 4.4.2