Auto setting of alarm limits
AssigneeKeithley Instruments, LLC
InventorsBrian P. Frackelton, George J. Polly
Life of this patent
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Abstract
A data acquisition system, including an input configured to receive a signal on a port and a processor. The processor determines, during an initial scan, a first measurement value of the signal on the port, sets at least one alarm value based on the first measurement value, the at least one alarm value being within a predetermined amount of the first measurement value, receives, during a subsequent scan, a second measurement value of the signal on the port, and generates an alert when the second measurement value violates the at least one alarm value.
Claims20
A data acquisition system, comprising:
- a plurality of ports, each port configured to receive a respective one of a plurality of signals;
- one or more processors coupled to the plurality of ports;
- and
- a memory coupled to the one or more processors,
- wherein the one or more processors are configured to:
- determine one or more channels of interest, each channel of interest receiving a corresponding signal of interest;
- initiate a preliminary scan of the channels of interest;
- during the preliminary scan, record in the memory a plurality of measurements of each signal of interest;
- determine a first measurement value of each signal of interest based on the plurality of measurements;
- for each signal of interest, set an alarm value based on the first measurement value, the alarm value being within a predetermined amount of the first measurement value;
- initiate a subsequent scan of the channels of interest;
- receive, during the subsequent scan, a second measurement value of each signal of interest;
- detect that the second measurement value of one of the signals of interest violates the corresponding alarm value;
- generate an alert in response to detecting that the second measurement value of one of the signals of interest violates the corresponding alarm value;
- and
- record the second measurement value of each signal of interest in the memory.
A method for alerting a user of an error during a data acquisition, the method comprising:
- receiving a signal at each of one or more channels;
- determining one or more channels of interest of the one or more channels, each channel of interest receiving a corresponding signal of interest;
- initiating a preliminary scan of the channels of interest;
- during the preliminary scan, recording, in a memory, a plurality of measurements of each signal of interest;
- determining a first measurement value of a characteristic of each signal of interest based on the plurality of measurements;
- for each signal of interest, setting at least one alarm value based on the respective first measurement value, the alarm value being within a predetermined amount of the first measurement value;
- initiating a subsequent scan of the channels of interest;
- receiving, during the subsequent scan, a second measurement value of the characteristic of each signal of interest;
- detecting that the second measurement value of one of the signals of interest violates the corresponding at least one alarm value;
- and
- generating an alert in response to detecting that the second measurement value of one of the signals of interest violates the corresponding at least one alarm value;
- and
- recording, in the memory, the second measurement value of the characteristic of each of the signals of interest.
A computer readable storage medium having instructions stored thereon that, when executed by a processor of a test and measurement instrument, cause the test and measurement instrument to:
- receive a signal from at least one device under test at each of one or more channels;
- determine one or more channels of interest of the one or more channels, each channel of interest receiving a corresponding signal of interest from the at least one device under test;
- initiate a preliminary scan of the channels of interest;
- during the preliminary scan, record, in a memory of the test and measurement instrument, a measurement of a characteristic of each signal of interest;
- for each signal of interest, set an alarm value based on the respective measurement of the characteristic during the preliminary scan, the alarm value being within a predetermined amount of the measurement of the characteristic;
- initiate a subsequent scan of the channels of interest;
- measure, during the subsequent scan, the characteristic of each signal of interest;
- detect that the characteristic of one of the signals of interest measured during the subsequent scan of the channels of interest violates the respective alarm value;
- generate an alert in response to detecting that the measurement of the characteristic of one of the signals of interest during the subsequent scan of the channels of interest violates the respective alarm value;
- and
- record, in the memory, the measurement of the characteristic of each of the signals of interest.
Dependencies are inferred from the claim text.