Chapter 3 Test Mode
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AC-4000 Service Manual No. 0181B
Zero point adjustment screen
Span adjustment screen
I
A/D CHECK [Scale zero point/span check and adjustment]
•
In the [C01] display, press the ENTER key to select the A/D CHECK menu.
(It will take a few seconds until the A/D board is initialized.)
•
Firstly, the A/D original data appears.
•
Pressing the ZERO key changes to the calibrated data of “20000” counts and “0”.
(“20000” counts is a data output from the A/D unit, and “0” denotes that “20000” counts are regarded as
zero point.)
•
In “C01-01-00” menu and after a zero point adjustment, put the same weight as the maximum weighing
capacity and press the TARE key to perform an auto-span.
•
After the span adjustment, finish to check the zero point and the weighing capacity value by repeating
zero point and span adjustments.
•
After completing the span adjustment, push the memory button on the board to store the adjustment
value in E2ROM.
•
When initializing E2ROM of the A/D circuit to the initial value, press the DEL key to initialize.
•
When E2ROM storage completes, press the END key to return to the hardware test menu screen.
Note 1: Changed data is cleared at the end of this menu unless it is stored in E2ROM by pushing the
memory button.
Note 2: The memory button is described in “Chapter 5”.
