MKS 937B Operation Manual
103
11 Maintenance of Series 937B Controller
modules
There are 3 sensor module slots (A, B, and C) available in the 937B controller. Sensor module plug-in
boards (Pirani/CP, capacitance manometer, cold cathode, hot cathode) can be inserted into any
available slot and the controller will automatically recognize the type of the board in the slot. Typically,
937B controllers are shipped with customer-specified sensor modules and these are tested at the
factory.
To change the factory controller configuration or to remove and adjust the appropriate module, follow
the steps shown below.
11.1 Removing and Installing a Sensor Module
Lethal voltages are present in the controller when it is powered. Disconnect the
power cable before disassembly.
Suitable ESD handling precautions should be followed while installing,
configuring or adjusting the instrument or any modules.
To remove a module for modification,
1. Make sure that the 937B power is off, and that the power cord is disconnected
2. Using a #1 Phillips screwdriver, remove the two screws on the top and bottom of the rear
panel of the sensor module.
3. Use a small, flat-blade screwdriver to gently pry the sensor module away from the rear
panel frame until it slides freely.
4. Carefully slide the module out.
5. Place the module on a static-protected workbench.
To installing a module into 937B,
1. Make sure that the 937B power if off, and that the power cord is disconnected
2. Align the module to fit and slide freely in the card guides, with the internal 32-pin DIN
connector end first.
3. Gently slide the module forward (A, B, or C).
4. Using a #1 Phillips screwdriver, tighten two screws on the top and bottom of the rear
panel of the module.
A sensor module (with 32-pin DIN) can only be inserted into slots A, B or C. It will
not fit into the COMM slot!
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