IOP 011B.9
Effective Date: 1/09/2017
Page 4 of 4
D. Return the probe to the calibration chamber.
E. Return the meter to the storage case and secure.
MAINTENANCE:
I. Battery replacement - see section I.A.
II. Membrane replacement - see section I.C.
REFERENCE:
Operations Manual YSI Model 55 Handheld Dissolved Oxygen System
This procedure has been reviewed and approved by the undersigned representatives of the U.S.
Fish and Wildlife Service.
REVIEWED/APPROVED______________________________ DATE____________
Field Supervisor (U.S.)
Digitally signed by
JESSICA BARBER
Date: 2020.03.10
11:02:47 -04'00'
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