INFICON BPG402-Sx ATM to Ultra-High Vacuum Gauge - Manual (Page 29)

tina46e1-a (2010-03) BPG402.om
29
The emission control mode function defines the rules by which the emission of the
gauge is switched on and off.
The manual mode feature has a positive effect on gauge live time, mainly in
process situations where the process chamber has to be vented frequently.
Emission Control Mode Description
• Automatic (AUTO) By default, the automatic mode is active and the emis-
sion is switched on and off automatically by the gauge.
However, the emission will only be switched on if the
pressure falls below "Switching on pressure" (
→ 8).
If the pressure rises above the "Switching off pressure"
(
→ 8), the emission is switched off. However, the
user can switch off the emission any time via the
interfaces (
→ below).
• Manual (MAN) In manual mode, the emission can be switched on and
off by the user. However, switching on the emission is
only possible if the pressure is below "Switching on
pressure" (
→ 8). If the pressure rises above the
"Switching off pressure" ( → 8) while the emission is
on, the emission will be switched off by the gauge.
The emission control mode parameter is only accessible via the serial
interfaces and described in the respective sections (
→ 30, [1] and
[2]).
The gauges with part number
353-572 and
353-573
have a built-in two-line display with an LCD matrix of 32×16 pixels. The first line
shows the pressure, the second line the pressure unit, the function and possible
errors. The background illumination is usually green, in the event of an error, it
changes to red. The pressure is displayed in mbar (default), Torr or Pa. The pres-
sure unit can be changed via RS232C interface (
→ 30).
Pressure reading
Pressure unit
Function display
(none) Pirani operation
E Emission 25 μA
E . Emission 5 mA
D Degas
4.7 Emission Control Mode
General
4.8 Display (BPG402-S)
Pressure Display
Function Display