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IGE 300 Page 11 of 21
4.2.1. SELECT
SELECT is a push-button. Pressing it will scroll through the different available operating modes. Rapidly
“double clicking” SELECT will either turn the selected filament on (if unit is off) or off (if the unit is on)
Note: Ensure vacuum is below 1x10-2 Torr. The IGE-3000 has an automatic shutoff feature that will not allow
filament turn on at pressures above 1x10-2 Torr. The shutoff feature will also automatically turn off the filament if
it is on (below 1x10-2 Torr) and pressure rises above 1x10-2.
4.2.2. ADJUST
ADJUST is a rotary encoder. Rotating ADJUST will select desired parameters within the different
modes.
4.2.3. STATUS BAR (RED LED’s)
The status bar displays information about the condition of the IGE-3000. A particular LED, when lit,
indicates that particular condition has been met.
High and Low will illuminate when respective TTL set point is activated high (+5 VDC).
F1 and F2 illuminate when the respective filaments are turned on.
The error LED is located in the middle of the top row and is not labeled. It is illuminated if the filament is not
turned on or the filament is turned on and indicated pressure is out of range.
4.2.4. MODE BAR (GREEN LED’s)
The Mode bar indicates in which mode the IGE-3000 is currently operating.
A particular LED, when lit indicates that particular mode has been entered.
The Available modes are Emis (emission), Dgas, Sp (set point), K (K factor) and Fil filament).
Refer to Section 3.3 for detailed explanations of the modes.
4.3. Operating Modes
4.3.1. No Mode (Normal Mode):
NO MODE is the default (normal) operating mode of the IGE-3000. During NO
MODE the numeric display indicates BA tube out put (pressure measurement value). Dashes displayed
on the numeric display indicate that the filament is not turned on, not operating properly, or that the
readings are out of range. The filament will automatically turn off if indicated pressure is above 1x10
-2
. NO
MODE is automatically entered when there are no modes selected or the current selected mode has timed
out. Time out occurs if no operator action is initiated after 15 seconds.
NOTE: Dashes displayed on the numeric display with the Filament 1 or Filament 2 LED’s illuminated, is an
indication that the B/A tube is not operating properly.
4.3.2. Emis (emission) Mode:
The Emis mode is entered by scrolling to the Emis position by pressing the SELECT push button. The
desired B/A tube emission current is then selected by rotating the ADJUST encoder to the desired emission
range. Available settings are 0.01 mA, 0.1 mA, 1 mA or AUTO ranging. In most situations the optimum
setting for the IGE-3000 is AUTO ranging. In AUTO ranging the IGE-3000’s CPU automatically
determines and sets the optimum emission current range as determined by the CPU and is based on the
pressure measurement. When operating in other than AUTO ranging, the following settings are
recommended: for the pressure ranges above 1x10
-4
Torr use 0.01 mA; for the pressure ranges 1x10
-4
to
1x10
-5
Torr use 0.1 mA and for the pressures below 1x10
-5
Torr use 1 mA.