YSI ProDSS Meter Calibration and Maintenance
K:\Streamkeepers\Monitoring\Eqpt & supplies\Calibration-Maintenance\SOPs\YSI ProDSS maint-
cal SOP's
10
Pre Season Maintenance and Calibration:
1.
Perform 3-point calibration with office standards. (detailed instructions follow) Record lot
#s and expiration dates on data sheet.
2.
Indicate “Y” in the calibrated column if calibration was successful.
3.
If a new Lot # of pH buffer was put into use:
After calibration, test the old lot of the
corresponding buffer against the new lot with the successfully calibrated meter. Record
results on the data sheet.
End of Season pH Calibration Check:
1.
Turn on and warm up instrument.
2.
Check and record readings of pH 7 and temp for the instrument in its kit pH 7 buffer. Do a 2
pt calibration per daily monitoring cal procedure using standards from the appropriate kit.
3.
Pour fresh pH buffer solutions 4.0, 7.0 and 10.0 into appropriate cylinders (office standards).
4.
Allow the instrument to stabilize and record the pH and temperature readings of each
instrument in each of the 3 office standards.
5.
Record the lot # and expiration date for each buffer used on the data sheet. Also date and
samplers initials.
A breakdown of the calibration screen for pH. Refer to this image during calibration for further
clarification.
