There may be several assignable meters in the system. Each meter module has a mantissa display (the meter), a liquid crystal display (LCD), two range select buttons, and an assign button. There is also an analog jack for each meter located on the rear of the meter chassis. The analog jack gives the value of the mantissa. The voltage range is 0-10v.

The current meter assignment is shown on a LCD located above the meter. The first line of the display shows the Label and RefName for the assigned parameter. The second line shows the parameter value and units. The third line shows the currently selected meter range.

The meter system is only accessable through the workstation it is connected to. The currently assigned readback parameter in the focused window is assigned to a meter when the assign button for that meter is pushed. If the mouse readback parameter is NULL, the meter is unassigned.

There are two meter range buttons. Pressing a button increases or decreases the meter range.

If both range buttons are pressed at the same time, the meter enters freeze mode. Freeze mode is indicated by the message "frz" on the 3rd line of the LCD. This mode is used with autoranging parameters such as the Faraday cup current reads. Pressing a button increases or decreases the meter range. Pressing both buttons at the same time when in freeze mode exits freeze mode.

Meter overrange is indicated by the word "overrange" on the LCD. No meter assignment is indicated by the LCD being blank.

Certain types of devices can not be assigned to the meters. These usually consist of digital (status/control) parameters. For example: Faraday cup position reads.