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Sierra Instruments Instruction Manual
Smart-Trak
®
2 Series 100
42
Note: The valve will move to the desired position immediately when you press the
enter key.
IMPORTANT SAFETY NOTES ABOUT PURGING
WARNING: When toxic or corrosive gases are used, purge
unit thoroughly with inert dry gas before disconnecting from
the gas line to prevent personnel from being injured when
coming in contact with the instrument. Chapter 3 discusses
how to purge your instrument. Always neutralize any toxic
gas trapped inside the instrument before removing it from
the gas line.
WARNING: The flow rate in Purge is much greater than the
calibrated full scale value and as a result can be dangerous.
Change Setpoint Source Screen (mass flow controllers only)
If you are already in the Lower Level Screens, push the right or left arrow until you
reach the Change Setpoint Source screen. To get to this screen
at any time: Press
Escape—Press Enter—enter password and Press Enter. Then, press the Right or
Left arrow until you reach this screen. The Change Setpoint Source screen allows
you to re-configure the location and type of the setpoint for the Smart-Trak 2
controller. If you intend to supply the setpoint command signal from the Pilot
Module or a computer using the RS-232 link, the display must show:
Change Setpoint
Source
Pilot/RS232
If, instead of using the Pilot Module or the RS-232 link, you prefer to supply an
analog setpoint signal to the Smart-Trak 2, press the enter button. “Pilot/RS232”
will begin to blink. Use the up and down arrows to make your selection from the
following choices:
0-5 VDC
0-10 VDC
1-5 VDC