Keithley 2280 Series Reference Manual

Section 2: General operation Series 2280 Precision DC Power Supply Reference Manual
2-18 077085503 / March 2019
Measure Rel/Filter menu
This menu contains settings that specify the way measurement information is returned.
Setting
Description
Function
Displays the presently selected function.
Rel State
Use the relative offset feature to subtract a set value or a baseline reading
from measurement readings. When you enable relative offset, all subsequent
measurements are displayed as the difference between the actual measured
value and the relative offset value.
Rel Acquire
Acquire the present reading as a relative value.
Reference
Configure the offset value. You can use Rel Acquire to set the present
reading as the relative offset value. You can also specify the relative offset
using the numerical keys, navigation control, and soft keys. The default value
is 0.
Type
The Series 2280 only supports moving average filtering. This filter
continuously adds measurements to the stack on a first-in, first-out basis,
replacing the oldest measurement in the stack with a new measurement.
Filter State
Enable or disable filtering of measurements.
Count
Sets the number of measurements that are averaged when filtering is
enabled. The number of measurements can be 2 through 100.
Window
Filtering uses a window to control filter threshold. When the input signal
remains within the selected window, measurements continue to be placed in
the stack. If the input signal changes to a value outside the window, the filter
resets and starts processing again, starting with new measurements.
Measure Math menu
This menu contains settings that configure the math function.
Setting
Description
Type
When the Math State is set to On, the mx+b math operation is performed on
measurements.
mx+b: Manipulate normal display readings by adjusting the m and b factors.
State
When the state is set to On, any math operations specified for the present
measurement function are performed before completing the measurement.
m(Gain)
Specify the scale factor for mx+b math operation. The valid range is –1e6 to
+1e6.
b(Offset)
Specify the offset for mx+b math operation. The valid range is –1e6 to +1e6.
Function
Displays the presently selected function.
Units
Specify the units suffix name for mx+b operation. You can only select one
capital letter for the name from the front panel.
Buffer Data Type
Select Reading to store measurements to the buffer without performing math
operations on them.
Select CALC to store measurements to the buffer after performing specified
math operations.

Keithley 2280 Series Specifications

General

Brand	Keithley
Model	2280 Series
Category	Power Supply
Language	English