MKS Granville-Phillips 358 series, Instruction Manual

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Preparing for Operation
Series 358 Micro-Ion Controller Instruction Manual - 358013 - Rev. B
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Command Syntax for
RS-485 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:
#AADG ON CR
From controller: OKCR
• 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, e.g., 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: #AADGSCR (Spaces may be omitted.)
From controller: 1CR (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: #AADS CG1 CR
From controller: 1.20E–03CR
• The DS CG1 and DS CG2 commands are used to display the pressures
from the second and third display lines.
• If the ion gauge is turned OFF, or is in its first few seconds of operation,
the controller will return 9.90E+09.
• The DS IG command will return pressure if the gauge is ON, and
9.90E+09 if it is OFF.