Test equipment and power supplies · 664x family

Agilent 664xA: troubleshooting and error codes

The ServiceForge knowledge base holds 3 documented symptoms for the Agilent 664xA, with 3 ranked causes, 1 diagnostic checks with test points and expected values, and 42 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

ADDR ERROR displayed when setting GPIB address

Display shows ADDR ERROR when attempting to enter a forbidden or invalid GPIB address

Ranked causes

1. Invalid GPIB address value entered (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Output connections touch causing arcing high voltage

Severe arcing may occur at output connections if they touch, resulting in burns, ignition or welding of parts

Ranked causes

1. Output connections inadvertently touching during remote programming (occasional)

First check

Verify output connections are properly isolated and cannot make contact

Test point: Output connections
Expected: Connections isolated, no contact risk

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Query DEADLOCKED error returned

System returns Query DEADLOCKED error when too many queries are requested in a single string

Ranked causes

1. Too many queries in a single command string (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`0`	NO ERROR	When error queue is empty or all errors have been read	info
`-100`	Command error	Generic command error received from system	error
`-101`	Invalid character	Invalid character in command	error
`-102`	Syntax error	Unrecognized command or data type in command message	error
`-103`	Invalid separator	Illegal character encountered in place of separator	error
`-104`	Data type error	Wrong data type provided for command parameter	error
`-105`	GET not allowed	<GET> function used inside a program message	error
`-108`	Parameter not allowed	Too many parameters supplied to command	error
`-109`	Missing parameter	Too few parameters supplied to command	error
`-112`	Program mnemonic too long	Command mnemonic exceeds 12 characters	error
`-113`	Undefined header	Command syntactically correct but not defined for this device	error
`-121`	Invalid character in number	Non-numeric character in numeric field (e.g. alpha in decimal data)	error
`-123`	Exponent too large	Numeric exponent exceeds magnitude of 32000	error
`-124`	Too many digits	Number received contains more than 255 digits	error
`-128`	Numeric data not allowed	Numeric data provided where non-numeric expected	error
`-131`	Invalid suffix	Unrecognized suffix or suffix not appropriate for parameter	error
`-138`	Suffix not allowed	Numeric element with disallowed suffix	error
`-141`	Invalid character data	Bad or unrecognized character	error
`-144`	Character data too long	Character string exceeds 12 characters	error
`-148`	Character data not allowed	Character data in invalid position	error
`-150`	String data error	Generic string data error	error
`-151`	Invalid string data	END received before closing quote	error
`-158`	String data not allowed	String data where not accepted	error
`-160`	Block data error	Generic block data error	error
`-161`	Invalid block data	END received before length satisfied	error
`-168`	Block data not allowed	Block data in invalid position	error
`-220`	Parameter error	Generic parameter error condition	error
`-221`	Settings conflict	Uncoupled parameters have conflicting values	warning
`-222`	Data out of range	Parameter value outside device operating range	error
`-223`	Too much data	Out of memory condition	error
`-240`	Hardware error	Device-dependent hardware failure	error
`-241`	Hardware missing	Required hardware not present or detected	error
`-310`	System error	Device-dependent system error	error
`-313`	Calibration memory lost	Out of calibration due to memory failure	error
`-330`	Self-test failed	Device self-test execution failure	error
`-350`	Queue overflow	Errors lost due to too many in queue	warning
`-350`	TOO MANY ERRORS	More errors accumulated than the queue can hold	critical
`-400`	Query error	Generic query error condition	error
`-410`	Query INTERRUPTED	DAB or GET before response complete	error
`-420`	Query UNTERMINATED	Addressed to talk, incomplete message received	error
`-430`	Query DEADLOCKED error	Too many query statements requested in a single command string	error
`-440`	Query UNTERMINATED	Query received after query for indefinite response	error

Likely causes and actions for each code are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.