Waters 515 HPLC - Resetting Strokes on Seals

4-8 Maintaining and Troubleshooting the Waters 515 Pump
5. Convert the recorded time to seconds (for example, 24 min 25 sec = 1465
sec).
6. Use the following formula to determine the percent error:
7. If the percent error is more than ±1%, do the following:
a. Press the Menu key until the Calibrate Menu appears.
b. Press Edit/Enter twice to access the submenu selections.
c. Press Menu to scroll to the Flowrate Calibration parameter.
d. Press Edit/Enter to access the Flowrate Calibration submenu.
e. If the percent error is negative, press the Down key to decrease the
calibration parameter by a percent value equivalent to the percent
error (this decreases motor speed and delivery volume). Example:
For the –2.3% error in step 6, decrease the calibration parameter by
2.3%.
If the percent error is positive, press the Up key to increase the
calibration parameter by a percent value equivalent to the percent
error (this increases motor speed and delivery volume).
f. Press Menu to store the parameter.
8. Press Menu until you are prompted to exit.
9. Press Edit/Enter to exit the Calibrate menu.
10. Repeat steps 3 through 6 until the percent error is no greater than ±1%.
11. When you finish, press Menu until you are prompted to exit.
12. Press Edit/Enter to exit the Calibrate menu.
Resetting strokes on seals
The following procedure describes how to reset the Strokes on Seals
parameter. This parameter records the number of accumulated strokes for the
Recorded time (in sec) – 1500
1500
x 100 = % error
Example:
1465 – 1500
1500
x 100 = –2.3% error
Formula: