Campbell-scientific OBS-5+ Sediment Concentration Monitor and Pressure Manual de usuario descargar pdf (Pagina 41)

OBS-5+ System

9.3 Batteries

The unit runs on three, C-size, alkaline batteries. Buy the expensive ones with

the longest expiration date (“use before May 20XX”). While operating

continuously, the OBS-5+ will run 125 hours (15, eight-hour surveys) in

Survey Mode and for as long as 3,000 hours in the Cyclic Mode.

Always put OBS-5+ to sleep for storage to conserve

battery capacity (see Section 6.2.13, Shutdown).

CAUTION

Refer to FIGURE 6-2 for battery installation. Battery life will depend on the

percentage of time the unit is sampling. TABLE 9-1 shows battery life as a

function of sample duration and interval to assist with planning your sampling

schedule (see Power in Section 6.2.9, Sampling Modes and Terms).

TABLE 9-1. Battery Life in Hours with 100% Power

Interval

(s)

100%

50%

100%

120

50%

120

100%

480 NO NO NO NO

600

> 3000 2050 780 1180 400

900

> 3000 > 3000 1100 2040 600

1800

> 3000 > 3000 1930 > 3000 1100

3600

> 3000 > 3000 > 3000 > 3000 1930

9.4 Pressure Housing

The pressure housing and O-ring seals require little maintenance other than

careful inspection every six months and service before moored deployments.

1) Disassemble O-ring seals and inspect mating surfaces for pits and

scratches.

2) Inspect O-rings for cuts and nicks; replace if necessary.

3) Clean O-rings and mating surfaces with a cotton swab and alcohol.

Remove fibers from groove and mating surfaces then grease O-rings

Molykote

Compound 55 and reassemble.

9.5 User-Serviceable Parts

Alkaline C cells and the components of the 21304 Accessory Kit can be

purchased as replacement parts. Campbell Scientific manufacturing part

numbers and product descriptions follow:

pn 20993 End-cap O-ring, Parker 2-136

pn 20989 Optic Bushings O-ring, ARP5 7.5 X 1.2 mm OBN

pn 21141 S.S. End-cap Screws, 5/16” X 3/8”

pn 21120 Dummy Plug, Subconn

MCDC8M

pn 21122 Plug Locking Sleeve, Subconn

MCDLSF

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 51 52

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