TPS-Compact doesn't reach speed and pressure display shows 00

My TPS-Compact is lingering in the "ramp" state (status LED is blinking with 400 ms period) and reaching only 3e-5 Torr. The front Pressure Display Module shows "00" and I don't know what that means (no mention of this in the manual). This morning before venting, the pressure in my connected small chamber was 4e-8 Torr (system working correctly). I can't totally rule out a small leak in my vacuum system, but I'm concerned there may be an issue with the turbo pump - maybe the controller? I don't have any sort of read-out connected to the pump, so I don't know the final relative speed of the turbo blades. Has anyone seen the Pressure Display Module show "00" and know what that means?

  • The Pressure Display Module will display pressure if a gauge (FRG700) is hooked up to the TPS-Compact gauge connector.

    Agilent A-PLUS Software is a communication, control, and monitoring software. With A-PLUS, you can drive and control the TPS-Compact by connecting to a PC through RS-232 or RS-485 serial communications.
    Data logging, chart representation, and network configuration features are included in the A-PLUS software, helping you set up your vacuum devices efficiently and letting you check your vacuum system status at any time.

    I’ve attached some A-Plus Software documents for your reference.

    Here’s the Agilent A-Plus direct download link: 

    Agilent also sells an RS232 Serial cable, with serial connectors at each end. 

    Unfortunately, most newer computers don’t have serial d-sub connectors.

    If your using a Serial to USB cable, USB-Serial driver link:
    Drivers for FTDI Chipset USB-SERIAL Adapters For A-Plus (Windows) 

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