Keithley 2280 Series, Справочное руководство

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Section 2: General operation Series 2280 Precision DC Power Supply Reference Manual
2-64 077085503 / March 2019
Some of the fields in this pane are explained in the following table. Math, Relative, OXP, and
Overflow settings visible in the table are saved in the instrument setup. You can save and recall
special setups before using the data logging function; see Saving setups (on page 2-82) for more
information.
Name Description
Math
If you set a function to calculate the logged data, 1 will be displayed in the cell in this
column. 0 means the data will not be calculated in a function. For more information
about this function, refer to Math calculations that you can apply to measurements
(on page 4-11).
Relative
In this column, 1 means the deviation caused by the line resistor is cancelled; 0
means the deviation is not cancelled. For more details about this setting, refer to
Relative offset (on page 4-12).
OXP
In this column, 1 means any kind of protection is enabled; 0 means that no protection
is enabled. For more details about this setting, refer to Protection (on page 2-78).
Overflow
In this column, 1 means the current has exceeded the preset current range; 0 means
the current is within the range. For more details about this setting, refer to Setting
overcurrent protection limits (on page 2-80).
Clear
If you select this button, all the data logged will be cleared.
Copy
If you select some rows in the logged data table and select Copy , you can then paste
the data into your report.
Copy all
If you select Copy all , you can paste all the logged data into your report.
USB communications
To use the rear-panel USB port, you must have the Virtual Instrument Software Architecture (VISA)
layer on the host computer. See How to install the Keithley I/O Layer (on page 2-69) for more
information.
VISA contains a USB-class driver for the USB Test and Measurement Class (USBTMC) protocol that,
once installed, allows the Microsoft Windows operating system to recognize the instrument.
When you connect a USB device that implements the USBTMC or USBTMC-USB488 protocol to the
computer, the VISA driver automatically detects the device. Note that the VISA driver only
automatically recognizes USBTMC and USBTMC-USB488 devices. It does not recognize other USB
devices, such as printers, scanners, and storage devices.
In this section, "USB instruments" refers to devices that implement the USBTMC or
USBTMC-USB488 protocol.