Project Watershed Central New York
Dedicated to facilitating water resource education in Central New York
Instrument Calibration and Frequency
Project Watershed CNY/SOS’s pH meter, turbidimeter, and conductivity meter are precalibrated by the manufacturer and calibrated by the Director before each monitoring event. The DR/2000 Spectrophotometer will also be calibrated using standards. Calibration procedures for equipment can be found in the Project Watershed CNY/SOS Study Design: SOPs and the Hach Company DREL/2000 Lab Manuals.
|
Parameter |
Equipment |
Calibration |
Standard |
|
Dissolved Oxygen |
Digital Titrator |
Check on sodium thiosulfate annually or when |
Titration Iodate-iodide standard 10.0 mg/L DO equivalent |
|
BOD |
Digital Titrator |
Check on sodium thiosulfate annually or when |
Titration Iodate-iodide standard 10.0 mg/L DO equivalent |
|
pH |
pH Meter |
every monitoring survey |
pH 4.0 and 7.0 buffers |
|
Reactive Phosphate |
DR/2000 Spectrophotometer |
every monitoring survey |
10.0 mg/L Phosphate standard |
|
Nitrate |
DR/2000 Spectrophotometer |
every monitoring survey |
10.0 mg/L Nitrate standard |
|
Chloride |
Digital Titrator |
Check on silver nitrate annually or when reagent |
Titration 100.0 mg/L standard |
|
Turbidity |
Turbidimeter |
every monitoring survey |
Blank sample cell |
|
Total Solids (TDS) |
Conductivity Meter |
every monitoring survey |
1000.0 mg/L NaCl standard |