ABB Navigator 550 Manuel - Sayfa 4

Ölçüm Cihazları ABB Navigator 550 için çevrimiçi göz atın veya pdf Manuel indirin. ABB Navigator 550 9 sayfaları. Low level dissolved oxygen wet-section
Ayrıca ABB Navigator 550 için: Devreye Alma Talimatları (8 sayfalar), Değiştirme Prosedürleri (8 sayfalar), Hızlı Başlangıç Kılavuzu (8 sayfalar), Manuel (6 sayfalar), Yedek Parça Değiştirme Prosedürleri (4 sayfalar)

Sample requirements

1. Ensure the sampling point is as close as possible to the

wet-section and provides a thoroughly-mixed representative

sample.

2. Sample must contain <10 ppm suspended solids with a

particle size no greater than 60 µm. (If particle sizes exceed

60 µm, use a 60 µm filter.)

3. Sample temperature must be within the range 5 to 55 °C

(41 to 131 °F).

Note. If the measured sample temperature exceeds

55 °C (131 °F), the calibration valve opens automatically

to protect the dissolved oxygen sensor from thermal

overload. The valve closes after 30 minutes, but if the

sample temperature still exceeds 55 °C (131 °F) the valve

re-opens.

4. Sample flow rates must be within the range 100 to

300 ml/min. (6.10 to 18.30 cu in./min.) – recommended

150 ml/min (9.15 cu in./min.).

5. Sample pressure must not exceed 2 bar gauge (29 psi).

Locating the wet-section

Referring to Fig. 1:

1. Locate the wet-section / transmitter indoors in a clean, dry,

well-ventilated, easily-accessible area.

2. Do not locate in rooms containing corrosive gases or vapors –

for example, with chlorination equipment or chlorine gas

cylinders.

3. Select a location not subject to strong electrical and magnetic

fields. If this is not possible (for example, where mobile

communications equipment is present), use screened cables

within flexible, earthed, metal conduit.

Maximum cable distance

to transmitter

30 m (98 ft.)

55 °C

(131 °F)

Max.

0 °C

(32 °F)

Min.

Fig. 1 Locating the wet-section

IP54

Humidity

Avoid

0 to 95 %

vibration

CI/ADS550–EN Rev. D