3.12 Real Timer Test
To execute the Real Timer Test, select 9 from the DIAGNOSTIC TEST MENU, press Enter
and follow the directions on the screen. The Real Timer Test contains three subtests that test
the T1900/T1900C’s real timer functions. Move the highlight bar to the subtest you want to
execute and press Enter.
Subtest 01 Real Time
A new date and time can be input during this subtest. To execute the real time
subtest follow these steps:
1. Select Subtest 01; the following message appears:
Current date : XX-XX-XXXX
Current time : XX:XX:XX
Enter new date:
PRESS [ENTER] KEY TO EXIT TEST
2. If the current date is not correct, input the correct date at the “Enter new
date” prompt and press Enter. The following prompt will appear:
Enter new time :
3. If the current time is not correct, input the correct time in 24-hour format.
Pressing Enter toggles between the time and the date. To exit, press Ctrl +
Break.
Subtest 02 Backup Memory
This subtest performs the following backup memory check:
❑ Writes 1 bit of “on” data to addresses 01h through 80h
❑ Writes 1 bit of “off” data to addresses FEh through 7Fh
❑ Writes the data pattern AAh through 55h to the RTC 50-byte memory
(address 0Eh to 3Fh)
The subtest then reads and compares this data with the original data.
To exit, press Ctrl + Break.
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