MKS HPS 903 Series, Operation And Maintenance Manual

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9 Cold Cathode Ionization Vacuum Sensor
Vacuum Connection
Standard (IMT) vacuum interfaces are shown above.
Use an all-metal clamp to mount a KF 25 or KF 40 flanged sensor body.
Electrical Connection
Mount the (IMT) to a grounded vacuum system.
Use a cable with a mating, 9-pin D-sub connector with strain reliefs to ensure
proper electrical connection and to reduce stress on the connectors.
Connect the cable to the (IMT) and to your power supply or measuring device
before operating the (IMT).
Ensure a low impedance electrical connection between the
(IMT) and the grounded vacuum system to shield the sensor
from external electromagnetic sources.
Input/Output Wiring
The chart and accompanying figure on the next page identify the pins of the
IMT connector and their functions. Make a cable using this information.
To be in compliance with EN 50082-1 immunity requirements, use a braided,
shielded cable. Connect the braid to the metal hoods at both ends of the
cable with the end for power supply connected to earth ground. The connector
kit shipped with the (IMT) includes a metal shell which provides an easy and
effective means of connecting the braid to it.
KF 25 KF 40
2¾" CF
1" tube