8. Device Status
8.1.ION GAUGE DEVICE STATUS: 4-DIGIT OCTAL WORD
When requested to transmit its status the
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
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 |
•bit 5: Filament Status.
•bit 4: Degas (0=degas off, 1=degas on)
•bit 3: Pressure less than
•bit 2: Pressure Greater than
•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).
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