MKS Baratron gauge controller

The MKS Baratron gauge controller has open collector outputs. When an alarm is activated, the alarm light on the MKS controller turns on, and its alarm connection ( a transistor collector) is effectively coupled to ground and able to sink up to 100 mA of current.

The alarm pressures of the MKS Baratron gauge controller should be set according to Table 12.2.

Table 12.2: Set points to use for the MKS Baratron.

Alarm	Pressure
H1	100 torr	Alarm when $P>100$ torr
H2	740 torr	Alarm when $P>740$ torr
L1	1.0 torr	Alarm when $P<1.0$ torr