HP 49g Graphing Calculator - Manual (Page 116)

To calculate elapsed time in seconds
1. To prepare to start timing, press
2. To start timing, press (ENTER).
3. To prepare to stop timing, press
4. To stop timing, press (ENTER).
5. Press
Q.
6. Press (H@.
7. Select the result of step 2.
8. Press (ENTER) twice.
9. Press
Q ( m TFD base b ^ r .
10. Select the result of step 8.
11. Press (ENTER).
12. Press ©.
13. Enter 8192.
14. Press
TOOLS TICKS.
0 TOOLS TICKS.
In RPN mode: follow steps 1, 2, press
steps 5, 9, 13, and 12.
STACK SWAP and continue with
Date and time arithmetic Page 12-7