MKS HPS 917, Operation And Maintenance Manual

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12 Pirani Vacuum Sensor System
Fuse Replacement
The Series 917 Pirani Controller has a combined fuse holder and IEC-320 port
located on the rear panel. Replace the fuse following the steps below.
1. Unplug the power cord from the IEC port.
2. Use a small screwdriver to pull open the fuse holder.
3. Replace the fuse with one of the following time-lag fuses:
T 0.1 A (Ø 5 mm x 20 mm) – 90 to 130 VAC
T 0.04 A (Ø 5 mm x 20 mm) – 210 to 250 VAC.
4. Close and secure the fuse holder.
Accessory Connector
Relay set point contacts and the analog output voltage can also be accessed
from the D-sub port, labeled
Accessory, on the rear panel of the Pirani
Controller. A connector kit is provided with the Pirani System. The figure and
chart on the next page identify the pin functions of the
Accessory port.
Do not inadvertently short circuit the set point relay contacts
to the analog output voltage.
Customizing a sensor cable
Tube Controller