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IGE 300 Page 18 of 21
8. Device Status
8.1. ION GAUGE DEVICE STATUS: 4-DIGIT OCTAL WORD
When requested to transmit its status the IGE-3000 responds with a 4-digit octal word.
FIGURE 7 -1 – DIGIT OCTAL WORD
• bit 11: Serial Receiver Overload
• bit 10: Main Board EEPROM Error.
• bit 9: Communication Syntax Error.
• bit 7 Emission Setting.
• bit 8 Emission Setting.
• bit 6: Filament Selection. (0=filament 1, 1=filament 2)
FIGURE 8- BITS 7 & 8 EMISSION CODE
• bit 5: Filament Status. (0=non-operating, 1=operating)
• bit 4: Degas (0=degas off, 1=degas on)
• bit 3: Pressure less than (0.1e-9 Torr) Set if true.
• bit 2: Pressure Greater than (1.0e-3 Torr) set if true.
• bit 1: High Set point Alarm Set if pressure is greater than the high set point
• bit 0: Low Set point Alarm Set if pressure is less than the low set point
8.2. Command Syntax
In the following examples of syntax codes, the special characters are explained:
•
The characters in square brackets [ ] represents a command string, either upper or lower case
command characters accepted. All characters must follow each other in the string with no spaces
or other characters.
• The characters within wavy brackets { } contain choices for the appropriate command.
• The characters within the symbols < > are the common abbreviations for the one digit ASCII
control codes which they represent, (e.g. <CR> represents carriage return).
BITS 7 & 8 BIT 8 BIT 7
NO EMISSIONS 0 0
0.01 Ma 0 1
0.1 mA 1 0
1.0 mA 1 1