MKS 146C - Hot Cathode; Table 14: Hot Cathode Coaxial Connector Pinout; Table 15: Hot Cathode Sensors and Cables

Chapter Three: Overview Inside the T
yp
e 146 Unit
55
Hot Cathode
Located on the end of the Hot Cathode board is one coaxial connector and one 15-pin female
Type “D” connector. Table 14 shows the connector pinout of the coaxial connector and Table 16
shows the Type “D” connector pinout. A list of MKS hot cathode gauges, along with their
cables, is shown in Table 15.
Note
Only hot cathode gauges with nude tubes are CE compliant. Hot cathode
gauges with glass tubes are not CE compliant. If your 146 unit is CE
com
p
liant,
y
ou must use a hot cathode
g
au
g
e with a nude tube for the unit
to remain CE compliant.
The 146 unit offers several power control features designed for use with hot cathode gauges. If
the 146 unit detects a disconnected hot cathode, a tube short, or an open filament in the HC
gauge, it automatically turns off power to the gauge. To restore power to the gauge, toggle the
HC channel off and on again. This feature is always enabled.
Hot Cathode Coaxial Connector Pinout
Ion Current SMA
Ion Current Center
Chassis Ground Shield
Table 14: Hot Cathode Coaxial Connector Pinout
Hot Cathode Sensors and Cables
Sensor Type Part Number
All MKS Hot Cathode Gauges Types IG-xx, RG75, and NRC563 consult factory
HPS low power, nude, Bayard-Alpert (B/A) hot cathode KF-40 100005987
HPS low power, nude, Bayard-Alpert (B/A) hot cathode 2¾ CF 100005980
Other nude or B/A tubes - thoriated iridium or tungsten filament Consult factory
Cable Description Part Number
Cable for glass envelope tubes CB146-13, CB146S-13
Cable for glass envelope tubes and external power CB146-16, CB146S-16
Cable for nude hot cathode tube CB146-19, CB146S-19
Table 15: Hot Cathode Sensors and Cables
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