HP 49g Graphing Calculator - Manual (Page 115)

System time
System time is kept in ticks of the clock. Each tick is 1/8192 of a second in
duration. System time can be converted to standard time (in both decimal
format and HMS format).
To display system time
1. Press (d m S TOOLS TICKS.
2. Press (ENTER).
System time is displayed as a binary number.
In RPN mode: follow step 1.
The TICKS command is useful for measming elapsed time.
To convert system time to HMS time
1. Press 0 O BASE B^R.
2. Enter the system time as a binary number.
For example: # lD6861E78DF52h.
3. Press (ENTER).
The result of this step is the real number equivalent of the specified
system time.
4. Press ©.
5. Enter 29491200.
The result of this step is the specified system time in decimal hours:
17, 542,402.5441.
6. Press (50 -^HMS.
7. Press (Hisf).
8. Select the result of step 5.
This result should now be the argument of the ^HMS command.
9. Press (EiER).
The result is 17,542,402.3239 (that is, 17,542,402 hours, 32 minutes, and
39 seconds.
In RPN mode: follow steps 2, 1, 5, 4, and 6.
Page 12-6 Date and time arithmetic