Agilent Technologies Eyesys Mini-B/A, Instruction Manual

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Eyesys Mini-B/A Gauge Controller
11
Error Conditions
The following error conditions are indicated on the LED display by flashing the number of
LEDs equal to the error number (see “Display” on page 7) and on the Serial Communication
Option by outputting the error number (see Appendix A “Serial Communications Option”).
Errors 5, 6, 8 and 9 are indicated on the output voltage by 10 V (see Voltage Output section
below).
For Errors 5, 6 and 9, emission is immediately turned off. To clear these errors, press the
Emission ON/OFF button – the top single flashing LED will be displayed, indicating
emission OFF and system at startup ready.
E05 Open filament: Tube replacement usually required. Follow Tube
Replacement Procedure. Once removed, a continuity check can be
made on the filament. Filament pins are the two pins nearest the
circumference of the tube.
E06 Grid voltage low: If caused by temporary glow discharge, restarting
emission will result in a functioning gauge. If permanent, grid
power supply requires factory inspection.
E08 Inter-board communication error: Main CPU board has failed to
receive communication from daughter board five consecutive
times. If emission is ON, it will be shut off. Only resumption of
inter-board communication will clear this error.
E09 Overpressure: Gauge has detected pressure higher than 1.0x10
-2
and has shut down emission.
NOTE
Venting (high vacuum to atmosphere) must last more than five
seconds for this error to take effect.)
Checksum A rapidly flashing LED at the bottom of a bar graph scale, a
slowly flashing digital display or a Data Invalid Status (serial
communications option), indicates an internal EEPROM
(non-volatile memory) checksum error. If the error signal clears
with repeated power-ups, no further action is required. If the error
signal persists, then a factory calibration factor has been reset and
although the unit can be used at slightly reduced accuracy, it
should be returned to the factory for re-calibration.
Serial
Communications
units If the checksum error indicator is present, any prior remote control
settings set by serial communication (for example, setpoint settings)
will be lost – the local switch settings are in effect. Remote settings
can be re-established, but will not be stored. The presence of a
checksum error can be determined by polling the Data Invalid
Status.