Agilent Technologies E3647A User Manual

Chapter 4 Remote Interface Reference
The SCPI Status Registers
106
The Questionable Instrument Summary Register
There are two Questionable Instrument Summary registers, one for each supply
output. These registers provide information about voltage and current regulation. Bit
0 is set when the voltage becomes unregulated, and bit 1 is set if the current becomes
unregulated. For example, if a supply which is operating as a voltage source (constant
voltage mode) momentarily goes to constant current mode, bit 0 is set to indicate that
the voltage output is not regulated. Bit 9 reports that the overvoltage protection circuit
has tripped. To read the register for each supply, send the command
STAT:QUES:INST:ISUM<n>?, where n is 1 or 2.
To determine the operating mode (CV or CC) for the power supply send
STAT:QUES:INST:ISUM<n>:COND?, where n is 1 or 2 depending on the output.
Bit 1 true indicates the output is in constant voltage mode, bit 0 true indicates constant
current mode, both bits true indicates neither the voltage nor the current is regulated,
and both bits false indicates the outputs of the power supply are off.
The Questionable Status Event register is cleared when:
• You execute the *CLS (clear status) command.
• You query the event register using STAT:QUES? (Status Questionable Event
register) command.
For example, 16 is returned when you have queried the status of the questionable
event register, the temperature condition is questionable.
The Questionable Status Enable register is cleared when:
• You execute STAT:QUES:ENAB 0 command.

Agilent Technologies E3647A Specifications

General

Brand	Agilent Technologies
Model	E3647A
Category	Power Supply
Language	English

Summary

Quick Start

Preliminary Checkout

Steps to verify that the power supply is ready for initial use and operation.

Output Checkout

Procedures to check basic voltage and current functions with no load.

General Information

Safety Considerations

Details safety and EMC requirements for the power supply, including relevant standards and guidelines.

Installation

Output Connections

Front-Panel Operation and Features

Constant Voltage Operation

Step-by-step guide for configuring and operating the power supply in constant voltage (CV) mode.

Constant Current Operation

Step-by-step guide for configuring and operating the power supply in constant current (CC) mode.

Configuring the Remote Interface

Programming Overvoltage Protection

Details on setting the OVP trip level, enabling the circuit, and clearing overvoltage conditions.

Remote Interface Reference

SCPI Command Summary

Output Setting and Operation Commands

Error Messages

Execution Errors

Self-Test Errors

Specifications

Performance Specifications

Appendix: Service Information

Service Information

Covers procedures for verifying operation, returning the unit, troubleshooting, and test equipment.

Operating Checklist

Troubleshooting Hints

Self-Test Procedures