MKS Baratron 121A, Instruction Manual, Page: 45 / 62

Chapter Four: Operation How To Prepare for Maximum Bakeout
35
Disassembly
To remove the sensor housing:
1. Turn off power to the instrument.
2. Use a flat head screwdriver to loosen the two cable strain relief screws.
3. Use a Phillips screwdriver to loosen and remove the two top housing screws that hold the
metal housing over the sensor.
4. Use a Phillips screwdriver to loosen and remove the three bottom housing screws that
attach the housing to the faceplate.
5. Remove the housing.
6. Use a ¼” nut driver to loosen and remove the upper two standoffs at the top of the cable
clamping assembly.
7. Disengage the cable clamping assembly from the middle standoffs.
8. Use needle-nose pliers to gently lift out the pin connectors.
Caution
Be sure to grip the pin connectors and not the coaxial cables.
9. Use a ¼” nut driver to loosen and remove the middle standoffs.
10. Remove the entire cable assembly.
The sensor is ready for bakeout up to 200° C.
Note
It is not necessary to remove the faceplate assembly during bakeout.