Agilent Technologies 66001A Selftest Error Messages, Display, Failed Test, Runtime Error Messages

Selftest Error Messages

Table 3-3 lists the displayed selftest error messages. All these errors are hardware failures that require service.

Note	If you are using the optional Agilent 66001A MPS Keyboard, it will also display selftest error
messages.
	Table 3-3. Selftest Error Messages

Display

U1 U 2 U 3 U 4 U 5 U 6 U 7

Failed Test

Internal RAM External RAM ROM checksum (Not used)

(Not used)

12 V supply

5 V supply

Display

U8 U 9 U 10 U 11 U 12 U 13

Failed Test

Ambient temperature reading (Not used)

Voltage programming, low range Current programming, low range Voltage programming, high range Current programming, high range

The power module also can detect an EEPROM checksum error. This error is not identified by number, but causes the following symptoms:

∙The power module starts up with both the VOLTS and AMPS full-scale programming and metering ranges accepting values up to 1000.

∙Self-test error code 330 is stored in the SCPI error queue where it can be read by software (see "Chapter 5 - Error Messages" in the Programming Guide).

∙The software identify query (*IDN?) returns 0A in the model field.

∙The calibration password is set to 0.

An EEPROM checksum error can occur due to the following operating conditions:

∙Excessive number of write cycles to an EEPROM (see Table 1-2). This condition is not recoverable and requires service.

∙Loss of ac input power during a checksum calculation. This condition, which is very unlikely, is recoverable. You may be able to recover by performing the following steps from the controller or keyboard:

1.Enable the calibration mode (CAL:STAT ON,0)

2.Save an operating state to EEPROM. (e.g., *SAV 2)

∙This forces the power module to write to EEPROM and establishes a new checksum.

Runtime Error Messages

Table 3-4 lists the runtime error messages. Runtime errors cease normal power module operation, disable the output, and display a code on the front panel. The error code is preceeded by "U" and is displayed on both the VOLTS and AMPS displays. Runtime errors are hardware malfunctions that require service.

Display

U 101

Meaning

EEPROM write error

Table 3-4. Runtime Error Messages

Display	Meaning
U 102	Internal software error

Display

U 103

Meaning

Unexpected interrupt

30 Turn-On Checkout