Service Operations and Testing
Testing the Indicator
VT200/220 Technical Manual, Rev 1.00.01 73 Doc # TM-VT200/220-EN
8.1.6 Viewing A/D Count (Function 81)
To view the A/D count:
Access the function menu and select function 81. The indicator shows the analog-
to-digital converter internal count. Press ESC (
) to exit.
8.1.7 View Software Version Number and Date (Function 82)
To view the number and date of the current software version:
Access the function menu and select function 82. The indicator shows software
version number and the date it was released. Press ESC (
) to exit.
8.1.8 Locking and Unlocking Keys
To lock keys:
1. Access the setup menus and navigate to SETUP > SETUP 6.
2. Set one or more of the following parameters to 1:
6.1 – SCALE
6.2 – ZERO
6.3 – TARE
6.4 – P.TARE
6.5 – PRINT
6.6 – TOTAL
6.7 – PCS
Keys you lock will not work (i.e. if a user presses them nothing will happen) until
you unlock them.
To unlock keys:
1. Access the setup menus and navigate to SETUP > SETUP 6.
2. Set the corresponding parameter to 0 (see the bulleted list above).
8.2 Testing the Indicator
8.2.1 Testing ROM/RAM Integrity (Function 86)
In order to check the integrity of the unit’s ROM and RAM use the procedure below.
Note that partly-corrupted memory does not necessarily affect indicator’s operations,
and can be corrected. To learn how to correct memory errors, see the VT200/220
User’s Guide, section 7.3.
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