Keithley 2303, Руководство пользователя

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2-12 Basic Power Supply Operation
Average readings
The average reading count (1 to 10) specifies the number of measurement conversions to
average for each reading. For example, with a reading count of 5, each displayed reading will
be the average of five measurement conversions.
The AVERAGE READINGS item of the menu is also used to set the average reading count
for DVM measurements. Note that it is not used to set the average reading count for pulse cur-
rent and long integration measurements. These measurements are covered in Sections 3 and 4,
respectively.
SCPI programming — measure V and I, and DVM input
The commands to measure output voltage and current, and the DVM input are summarized
in Table 2-5. The “Programming examples” at the end of this section demonstrates how to use
these commands.
A. SENSe:FUNCtion <name>
1. The parameter name can instead be enclosed in single quotes (e.g., ‘CURRent’).
2. With “DVMeter” selected, the instrument measures the voltage applied to the input of
the digital voltmeter (DVM).
3. The “PCURrent” and “LINTegration” parameters for :FUNCtion (which are not listed
in Table 2-5) select the pulse current and long integration measurement modes. These
measurement modes are covered in Sections 3 and 4, respectively.
B. SENSe:AVERage <NRf>
1. When requesting a single reading (FETch?, READ?, or MEASure?), average count
specifies the number of measurement conversions to average for the reading. For exam-
ple, with the average count set to 10, READ? will trigger 10 measurement conversions
and return (and display) the average of those 10 conversions.
Table 2-5
SCPI commands — measure V and I, and DVM input
Commands Description Default Ref
SENSe
:FUNCtion <name>
:NPLCycles <n>
:AVERage <NRf>
READ?
READ:ARRay?
SENSe subystem:
Select readback function; “VOLTage”, “CURRent”,
or “DVMeter”.
Set integration rate (in line cycles) for voltage, current,
and DVM measurements; 0.01 to 10.
Specify the average count for voltage, current, and
DVM measurements; 1 to 10.
Trigger and return one reading.
Trigger an array of readings and return them.
VOLT
1.0
1
A
B
B
B