Agilent Technologies Eyesys Mini-B/A, Instruction Manual

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Eyesys Mini-B/A Gauge Controller
7
Display
The LED bargraph display provides an indication of pressure level throughout the operating
range of the gauge. When the filament is OFF, the topmost LED is illuminated. When the
filament is ON, the illuminated LED indicates the decade range of the current pressure
reading. LED indications other than a single LED have special meanings. Table 5 lists the
error conditions and their descriptions.
Digital Display Option
The optional digital display mode reads pressure directly, for example, 7.8x10
-2
Pa reads
“7.8-2”, 1.3x10
-6
Torr reads “1.3-6”. Error readings are also read directly, example, “E06”.
Front Panel Controls
The following controls are active only in Local Control (see Serial Communications Option
for Remote Control).
Emission ON/OFF Button
If the display shows a single flashing LED at the top of the scale, emission is off. Pressing the
Emission ON/OFF button turns emission ON, and pressure readings commence after a five
second delay for stabilization.
At any time during pressure readings, emission may be turned OFF by pressing the Emission
ON/OFF button.
Errors 5, 6 and 9 must be cleared by pressing the Emission ON/OFF button before
commencing further readings (see Error Conditions).
Table 5 Bargraph Display Indicators
LED Bargraph Display Indicates
Single flashing LED at top of scale Emission OFF
Single flashing LED throughout the range Degas activated (see Controls, Degas)
Five flashing LEDs Error 5
Six flashing LEDs Error 6
Eight flashing LEDs Error 8
Nine flashing LEDs Error 9
Single led flashing at bottom of scale EEPROM Checksum Error