IOP 011C.3
Effective Date: 1/09/2017
Replaces IOP 011C.2
Page 1 of 6
U.S. Fish and Wildlife Service
Marquette Biological Station
3090 Wright Street
Marquette, Michigan 49855
U.S.A.
and
U.S. Fish and Wildlife Service
Ludington Biological Station
5050 Commerce Drive
Ludington, Michigan 49431
and
Fisheries and Oceans Canada
Sea Lamprey Control Centre
1219 Queen Street East
Sault Ste. Marie, Ontario P6A 2E5
Canada
INSTRUMENT OPERATING PROCEDURE
INSTRUMENT:
Dissolved oxygen meter
MODEL:
Pro 20
MANUFACTURER:
Yellow Springs Instrument Co., Inc.
PRECAUTIONS:
POTENTIAL INTERFERENCES
Chlorine, sulfur dioxide, nitric oxide, and nitrous oxide can affect readings by behaving like oxygen at
membrane. Static electricity may affect readings.
Gold Cathode - The gold cathode on the sensor must be textured properly. It may becomes tarnished or
plated with silver after extended periods of use.
Bubbles under the membrane cap.
Remove excessive water in calibration/storage sleeve.
SAFETY
No Special precautions
