MKS Granville-Phillips 358 series, Instruction Manual

Page: 88 / 122

Chapter 5
88
Series 358 Micro-Ion Controller Instruction Manual - 358013 - Rev. B
Command Syntax for
RS-232 Computer
Interface
DG
Definition: Turn degas ON or OFF.
Modifiers: ON or OFF
Response: OK if command accepted, or INVALID if
rejected.
Example:
From computer: DG ON CRLF
From controller: OKCRLF
• Command is INVALID if the Ion gauge is OFF.
• A response to the DG ON command of OK indicates only that a signal
requesting degas has been sent to the electrometer. Degas may fail to
activate if the pressure is above 5 x 10-5 Torr. Use the DGS command
(see below) to verify that degas has been successfully initiated.
DGS
Definition: Display degas status.
Modifiers: None
Response: ASCII 1 if degas is ON, 0 if degas is OFF.
Example:
From computer: DGS CRLF
From controller: 1CRLF (Indicating degas is ON.)
DS
Definition: Display pressure reading.
Modifiers: IG or CG1 or CG2.
Response: ASCII string representing the pressure for the
selected gauge.
Example:
From computer: DS IG CRLF
From controller: 1.20E-07CRLF
• The DS IG command will return pressure from the top display if either
filament is ON, and 9.90E+09 if the gauge is OFF.
• The DS CG1 command will return pressure from the middle display.
• The DS CG2 command will return pressure from the bottom display.