Operation
Micro-Ion
®
Module Instruction Manual - 356007-GP 51
Installation Operation MaintenanceBefore You Begin
Use the “S” switch to read the pressure output status.
IGMS command from host: #01IGMS↵
Example response from module: *01 0 ALL↵
• The “0 ALL” character string means all pressure indications are disabled
when the Micro-Ion gauge is OFF.
• The “1 IG” character string means pressure indications are enabled when
the Micro-Ion gauge is OFF.
IDT - Set or Read the
Micro-Ion Gauge Delay
Time
The ion gauge delay time (IDT) command changes the amount of time the
Micro-Ion gauge waits to turn ON after pressure has decreased to a point
where the gauge can operate. This is useful to allow sufficient time for
corrosive gases to be pumped out of the chamber before the Micro-Ion
gauge hot filament is turned ON.
The example IDT command sets the additional delay time to 20 seconds.
Example IDT command from host:#01IDT 20↵
Response from module: *01 PROGM OK↵
• The command includes the alpha characters “I”, “D”, and “T” and the
numeric value representing the number of seconds.
• Valid values are 0 to 600 seconds.
• The Micro-Ion gauge will wait the number of seconds specified in the IDT
command, plus the software-defined delay, before turning on with
decreasing pressure.
• With increasing pressure, the Micro-Ion gauge will turn OFF when
pressure increases to 30 mTorr (3.99 x 10
–2
mbar, 3.99 pascal).
If you send the IDT command without the time value, the module returns a
character string that represents the Micro-Ion gauge delay time.
IDT command from host: #01IDT↵
Example response from module: *01 60 IDT↵
The example response means the delay time is set to 60 seconds. If the SF
command is set to T (tungsten), the response does not include the additional
software-determined delay.
During the delay, outputs indicate pressure as measured by the Conductron
sensor.
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