Hach-lange ORBISPHERE 31xxx Installation and Maintenance Manuel d'utilisateur télécharger pdf (Page 15)

13

Technical Specifications

2.4.4 Ozone sensors

Table 6 Membrane specifications - Ozone sensors

Membrane Model 2956A 29552A

Recommended

applications

Trace

measurement

High concentration

(> 1 mg/l)

Material PFA PTFE

Thickness [µm] 25 50

Calibration gas

Span gas

or air

Dissolved measurement

range

0 ppb to

50 ppm

0 ppb to

200 ppm

Gaseous measurement

range

0 Pa to

10 kPa

0 Pa to

40 kPa

Accuracy

The greater of ±1%

of reading

(± 5% for sensors

calibrated in air)

or ± 5 ppb,

or ±1 Pa

The greater of ±1%

of reading

(± 5% for sensors

calibrated in air)

or ± 20 ppb,

or ± 4 Pa

Integrated radiation dose

limit

2 x 10

4

N/A

Expected current in air @

1 bar 25°C [µA]

26.4 6.5

Expected current in pure

gas [µA]

105 31.4

Temp. compensation

range

–5 to 45° C

Temp. measuring range –5 to 100° C

Response time

1

1

Response time at 25 °C for a 90% signal change

30 sec. 6 min.

Recommended min. liquid

flow rate

2

[mL/min]

2

Liquid flow through an ORBISPHERE 32001 flow chamber, with

protection cap and no grille

350

3

3

These flow rates take into account the decomposition of ozone in

the tubing between the line and the flow chamber (theoretical flow

rates in the absence of decomposition would be 10 times less)

100

3

Recommended min. linear

flow rate

2

[cm/sec]

30 10

Recommended gaseous

flow rate [L/min]

0.01 to 3

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 45 46

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