Xpu Display; Xpu-2 Display - Honeywell 854 ATG Series Instruction Manual

Operation

Display contrast

For best readability the viewing angle can be adjusted, using a small potentiometer on the XPU board, on the

bottom left (refer to figure). Normally, it is adjusted in the factory for viewing horizontally.

Repeatability test

If the test magnet (item 7 of the tool kit) is hold for approximately 5 seconds in front of the rectangle block

below the display, a repeatability test is performed. If the test magnet is hold for more than 8 seconds, a lock

test is performed. The lock test function is cancelled when the magnet is removed.

Display contrast

Item CD allows the user to adjust the display contrast for maximum readability. CD can be set between 01

(minimum contrast) and 16 (maximum contrast). The display contrast can also be adjusted by means of the

hall switches.

Additional displays

There are four hall switches located on the XPU-2 display, marked: "L", "R", "U" and "D" (refer to figure).

These switches can be operated by holding a magnet in front of them (not the test magnet!).

Switch "L" allows scrolling through several additional displays. When an additional display is selected, further

information can be requested by operating the other switches. After 3 seconds the display switches back to

the standard display format (programmed by item DF).

The additional display gives information on:

• Display configuration

• NOVRAM item view

• XPU-2 error list

• System configuration

• Diagnostic view

• Test - Lock test - Unlock

The table on next page gives an overview of the additional display selections.

Instruction manual 854 ATG

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