Vishay VT 200, Technical Manual, Page: 73 / 84

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.