Show Instrument Schematic

Use to enable the manual control of certain system valves and pump components on the analyzer schematic.

When this option is enabled, a checkmark appears to the left of Unit [n] > Enable Manual Control.

If the analyzer schematic is not immediately visible, go to Unit [n] > Show Instrument Schematic.

  1. Differential pressure transducer
  2. Balance tube
  3. Balance volume adjustment
  4. Balance tube reservoir
  5. Quantity adsorbed transducer
  6. Sample tube reservoir
  7. P̀o tube, valve, and transducer reading are not displayed on Model 2390a
  8. Sample tube
  9. Elevator
  10. Pressure relief valve
Analyzer Schematic Icons
Icon or Symbol Description

Open Valve. Green indicates an open valve.

Closed Valve. Yellow indicates a closed valve. When manual control is disabled, closed valves appear white.

Servo Valve. Closed.

Servo Valve. Open.

Elevator.
Reservoir. For the balance tube and sample tube.

Volume adsorbed transducer (upper).

Differential pressure transducer (lower).

The reading for the volume adsorbed transducer is displayed just above the symbol. The reading for the sample pressure transducer is displayed just below the analysis servo valve and valve 5-s.

Balance volume adjustment. Can be adjusted by a Micromeritics Service Representative.
Pressure relief valve. Prevents excessive pressure build-up in the event of abnormal operation.
Balance tube and sample tube.
Analyzer Schematic Components
Schematic
Components
Description
1 Vacuum valve
2 Adsorptive valve
3 Helium valve
4-b Balance reservoir valve
4-s Sample reservoir valve
5-b Balance port valve
5-s Analysis port valve
6 P0 port valve (models 2390 and 2390t only)

Instrument Schematic Shortcut Menus

Schematic Shortcuts
Icon or Symbol Description

Valve options

For valves:

  • Close. Closes the selected valve.
  • Close both. Closes valves 4b and 4s or valves 5b and 5s.
  • Open. Opens the selected valve.
  • Open both. Opens valves 4b and 4s or valves 5b and 5s.
  • Pulse. Use to quickly turn the valve on and off allowing the operation to proceed in small increments.

For servo valve:

  • On/Off. Turns the servo valve on or off.
  • Increase / Decrease. Increases pressure by dosing the sample. Decreases pressure by evacuating the sample.
  • Enter target. Displays the servo valve settings window. The entered target pressure display to the left of the sample servo valve icon.

For balance servo valve:

  • Disable. Select to disable the balance servo valve. Operations for the sample servo will also be performed by the balance servo.
  • Enable. Select to enable the balance servo valve. Operations for the sample servo will be ignored by the balance servo.

Elevator options

Raise. Select Raise to raise the elevator. When it is moving, press the keyboard space bar to stop the movement (or right click and select Stop from the menu).

Lower. Select Lower and press the keyboard space bar to lower the elevator.

Stop. Stops the elevator from moving.