The analyzer is based on a yttria stabilized zirconia cell, that supply the relevant advantages that this measuring principle can guarantee. The absence of cross sensitivity with other gases due to the oxygen vacancy generated in the zirconia substrate is one of the most important feature.

 

The peculiar drawing of the analysis chamber allows the changing of the flow of the sample without affecting the O2 measure.

 

The analyzer does not require regular calibrations because it is fully temperature compensated. The measuring principle that does not need any moving parts, ensures a very long life without any service.

 

The measuring range by volume is very wide O2 values and diagnostic are transmitted with analogical, serial and digital output. Optionally the Hart protocol is available.

 

This very tough instrument, is ideal to be used in a system for emission monitoring. It cannot be used for measuring O2 in a gas that contains combustibles, because the zirconia cell is warmed up to high temperature.

 

TECHNICAL SPECIFICATIONS

 

Gas analyzed:  Oxygen in gas phase

Measuring principle:  Stabilized zirconia

Measuring field: 1 ppm – 25% O2 by volume

Accuracy:  +/- 0.5 of true value or 0.1% O2 whichever is the greater

Repeatability:  Within  1%

Response time  (90%):  < 10 sec. With a flow of 3 l/min

Flow of the sample gas:  0.5 – 3 l/min

Flow adjusting:  Niddle valve of the flowmeter.

Analog outputs:  4 – 20 mA isolated, max load 500 ohm or 0 – 10 V  10 mA linear on one of the following selectable fields:

0 – 1999 ppm; 

0 – 5%; 

0 – 10%; 

0 – 25% , if the value is not valid the output is switched to 2 mA.

Serial outputs:  Mod Bus RTU su RS 485

Options:  Hart protocol

Alarms:  Potential free for: O2 high, O2 low, measure not valid, servicing, lack of flow. For all  250 V, 1 A max.

Dumper:  Time constant selectable from 0 and 900 sec.

Power supply:  230 e 115 V AC +/- 10%  50/60 Hz  300 VA max

EMC:  According EN 50081 e 50082

Electrical safety:  According EN 61010 – 1

Temperature limits:  0 – 40°C

Humidity:  < 90% non condensating

Storage temperature:  - 40 / +80°C

Sample gas input and output:  tubing  mm. 6x4

Test gas input:  tubing  mm. 6x4

Housing:  Rack 19” 3 units  IP20

Dimensions:  450x132 mm, deep 380 mm

Weight:  9 Kg approx.