Esr; Idn; Lrn - Keysight E4981A Programming Manual

Command Reference
IEEE Common Commands

*ESR?

Syntax *ESR?
Description Reads out the value of the Standard Event Status Register. Executing this
command clears the register value. (Query only)
Query response {numeric}<newline><^END>
Equivalent key No equivalent key is available on the front panel.
sequence

*IDN?

Syntax *IDN?
Description Reads out the product information (model number, serial number, and
firmware version number) of the E4981A. (Query only)
Query response {string 1},{string 2},{string 3}, {string 4} <newline><^END>
Readout data is as follows:
{string 1}
{string 2}
{string 3}
{string 4}
Equivalent key [System]
sequence

*LRN?

Syntax *LRN?
Description Returns all the necessary commands to set the E4981A at its present state.
The response can later be sent back to the E4981A to place it in this state.
(Query Only)
Equivalent key No equivalent key is available on the front panel.
sequence
158
Keysight Technologies.
Model number. E4981A is always read out.
10-digit serial number (example: JP1KH00101).
Firmware version number (example: A.01.00).
Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter