Keithley 3721-ST User Manual

Series 3700A System Switch/Multimeter Reference Manual Appendix A: LAN concepts and settings
3700AS-901-01 Rev. D/June 2018 A-19
Event log descriptions
Column title
Description
Example
HWDetect
Identifies a valid LXI trigger packet
LXI
Sequence
Each instrument maintains independent
sequence counters:
▪ One for each combination of UDP
multicast network interface and UDP
multicast destination port
▪ One for each TCP connection
Domain
Displays the LXI domain number; the default
value is 0 (zero)
0
1523
Flags
Contain data about the LXI trigger packet;
values are:
▪ 1 - Error
▪ 2 - Retransmission
▪ 4 - Hardware
▪ 8 - Acknowledgments
▪ 16 - Stateless bit
Data
The values for this are always 0 (zero)
Accessing the event log from the command interface
You can access the event log from any remote command interface. The event log must be enabled
before LXI trigger events can be viewed. To enable the event log, send:
eventlog.enable = 1
To view the event log from a remote interface, send:
print(eventlog.all())
This command outputs one or more strings similar to the following:
14:14:02.000 17 Jun 2008, LAN0, 10.80.64.191, LXI, 0, 1213712000, not
available, 0, 0x10,0x00
The string displays the same information as the web interface. Commas separate the fields. The
fields output in the following order:
• Received time (UTC time)
• Event ID
• From (Sender)
• HWDetect / version
• Domain
• Sequence number
• Timestamp (PTP time)
• Epoch (from 1588)
• Flags
• Data
See the table in Logging LAN trigger events in the event log (on page A-18) for detailed descriptions.

Keithley 3721-ST Specifications

General

Type	Multimeter
Model	3721-ST
Manufacturer	Keithley
Measurement Functions	DC Voltage, AC Voltage, DC Current, AC Current, Resistance, Frequency, Temperature
Relay Type	Electromechanical
Temperature Range	-200°C to 1820°C
Accuracy	Varies by function and range
Resolution	Varies by function and range
Display	LCD
Interface	GPIB, RS-232
Topology	Multiplexer
Maximum Switching Voltage	300 V
Maximum Switching Current	1 A
Input Impedance	>10 GΩ (DC Voltage ranges)