Units, Menu, Option – American Magnetics 286 Multi-Sensor Liquid Level Instrument (CE-Marked) User Manual

Page 47

Calibration

Calibration Menu Reference

Note

Use the OPTION key to toggle the sign for the zero offset. Zero offsets
must be entered in percent units. The

UNITS

key is inactive within

the menu.

The allowable range for the offset value is

−

100% to 100%. If the

entered offset value is within the allowable range, but results in an
overflow of the measuring circuits within the Model 286, then the
instrument will beep once and revert to the previous value. The
zero offset value allows the operator to nullify the effects of any
constant value of stray capacitance that may be present in the
system. Sources of constant-valued capacitance might, for example,
include different length oscillator cables.

Use the

ESC

key to return to the sensor input selection

menu.

3.3.5

Perform Calibration Sub-Menu

If the

Select

option is chosen as documented in paragraph 3.3.3, then the

operator is presented with the following menu selections. The

ESC

key can

be used at any point to exit the sub-menu.

3.3.5.1 Select calibration to perform

The operator must select which calibration of the four available is
desired. The asterisk

in the display indicates that a calibration

has previously been performed. By default, as the menu is entered,
the next open calibration will be selected. Use the

OPTION

key to

cycle the cursor. It is allowable to re-calibrate a previously
performed calibration. After selection, use the

key to

continue.

3.3.5.2 Active length entry

Note

The active length adjustment can only be performed in the inches or
centimeter units modes. If the menu is entered in percent units
mode, the Model 286 will automatically change the units to cm.

A: Perform Cal?

2* $3

A: Active Length