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Setting the HP E1505
Current Source SCP
Chapter 3
The cutoff frequency selections provided by the SCP can be assigned to any
channel individually or in groups. Send a separate command for each
frequency selection. For example:
To set 10 Hz cutoff for channels 0, 4, 6, and 10 through 19 send:
INP:FILT:FREQ 10,(@100,104,106,110:119)
To set 10 Hz cutoff for channels 0 through 15, and 100 Hz cutoff for
channels 16 through 23 send:
INP:FILT:FREQ 10,(@100:115)
INP:FILT:FREQ 100,(@116:123)
or to combine into a single command message
INP:FILT:FREQ 10,(@100:115);FREQ 100,(@116:123)
By default (after *RST or at power-on) the filters are enabled. To disable or
re-enable individual (or all) channels, use the INP:FILT ON | OFF,
(@<ch_list>) command. For example, to program all but a few filters on,
send:
INP:FILT:STAT ON,(@100:163)
INP:FILT:STAT OFF,(@100, 123,146,163)
The Current Source SCP supplies excitation current for resistance type
measurements. These include resistance, and temperature measurements
using resistance temperature sensors. The commands to control Current
Source SCPs are:
OUTPut:CURRent:AMPLitude <amplitude>,(@<ch_list>) and
OUTPut:CURRent[:STATe] <enable>.
•
The amplitude parameter sets the current output level. It is specified in
units of Amps DC and for the HP E1505 SCP can take on the values
30e-6 (or MIN), and 488e-6 (or MAX). Select 488µA for measuring
resistances of less than 8,000 Ohms. Select 30µA for resistances of
8,000 Ohms and above.
•
The ch_list parameter specifies the Current Source SCP channels that
will be set.
To set channels 0 through 9 to output 30 µA and channels 10 through 19 to
output 488 µA:
OUTP:CURR 30e-6,(@100:109)
OUTP:CURR 488e-6,(@110:119)
or to combine into a single command message:
OUTP:CURR 30e-6,(@100:109);CURR 488e-6,(@110:119)
Programming the HP E1415 for PID Control
all channel's filters on (same as
at *RST)
only channels 0, 23, 46, and 63
OFF
separate command per output
level
63
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