MKS HPS 919 Series, Operation And Maintenance Manual

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Hot Cathode Ionization High Vacuum Senor System
The Controller operates with line frequencies of 50 or 60 Hz without any
adjustment necessary. It is configured at the factory to operate at either 100,
120, 220, or 240 VAC.
To change a line voltage,
1 Unplug the power cord from the Controller.
2 Insert a screwdriver blade under the tab to the left of the voltage
display on the power connector. Gently twist the screwdriver to open
the cover and expose the voltage selector drum and the fuse.
3 Pull out the selector drum, as shown in the exploded view at right,
and rotate it until the correct nominal line voltage faces you. The
available choices are shown below. Be sure to use the correct fuse
with the chosen line voltage.
4 Replace the drum in its bracket, and close the cover.
Controller Mounting
The Series 919 Hot Cathode Controller is designed for either rack mounting or
for stand-alone use. Regardless of the method you choose, assure adequate
ventilation to the Controller with at least 1 inch left open above the top
perforated panel.
For bench top use, adhesive backed rubber pads are provided. Remove the
adhesive backing from each pad and apply one to each corner of the
aluminum bottom surface.
Optional mounting hardware is available for mounting the half-rack casing in a
19-inch rack frame and trim panel or in the frame with a splicing plate (see
Accessories, p. 39).
To mount two Controllers or one Controller with one face plate in a rack, as
shown on the left at the top of the next page,
1 Hold or stabilize the Controller in the rack while securing the
front panel of the Controller to one side of the rack with the
screws provided.
2 Attach the small splicing plate to the back side of the other end of
the front panel.
Select line voltage here
Controller rear
panel
AC power
connector with
fuse box
Voltage selector drum
Voltage, Range Voltage, Nominal
Fuse (V) (V) (A)
90 to 110 100 T 1.25
110 to 130 120 T 1.00
210 to 230 220 T 0.63
230 to 250 240 T 0.50
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