The Application:
The Trace Oxygen Analyser AMS 3186 operates on base of an electrochemical sensor. The Trace Oxygen Analyser AMS 3186 is a micro-processor controlled analyser for the highly accurate measurement of lowest oxygen traces. Changes in concentrations of < 0,1 ppm of oxygen with a resolution of 0,01 ppm can be measured. The available housings are designed for use in General Applications. The lowest oxygen measuring range is 0 … 1 ppm.
The Measuring system:
Besides of the measuring cell and pneumatic components we are also heating the gas pipes or the highest repeatability / stability measurement in a range of 0…1 ppm. For that reason our analyser is divided into 2 parts. The electrical connections are done by assembled cables on the backsite of the analyser via screws. The temperature in the pneumatic cassette is controlled and adjusted to a fixed value (range +10…+40°C). By that fact the fluctuations of the ambient temperature can be taken into account. An easy exchange of the gas-tight-potted cell leads to a very fast restart of the measurement and avoids large purge times.
Technical data
| Analyser | AMS 3186 |
|---|---|
| Measuring principle | Electrochemical oxygen sensor |
| Application | Gases Industries, Chemical Industries, Process Measurement |
| Measuring range | 4, automatic selection, digital ID, adjustable 0 … 10, 0 ... 100, 0 ... 1.000, 0 … 10.000 ppmv |
| Analogue signal port | 0 (4) … 20mA, galvanically separated, with measuring range changeover and digital identification |
| Reproducability | +/– 2 % of the measuring value, +/– 0.5 % of the measuring range |
| Resolution | 0,01 ppm – c(O2) – 1 ppm, depending on the O2 concentration |
| T90-Time | < 30 seconds |
| Long term drift | < 1% per month |
| Display | 2* 16 digit, illuminated LCD display |
| Analyser Status Messages | System Status, Calibration, Service via potential free contact relays |
| Oxygen Messages | 2 Messages, configurable as Oxygen Alarm HIGH / LOW via potential free contact relays |
| Gas connection | inlet / outlet 3 / 6 mm ferrule pack (others on request) |
| Gas sampling | built-in inlet / outlet valve, flowmeter |
| Sample flow | min. 20 Nl/h, max. 40 Nl/h |
| Sample pressure (inlet) | min. 1,05 bar abs., max. 2 bar abs. |
| Sample pressure (measuring cell) | max. 50 mbar pressure |
| Digital communication | serial interface RS 232 |
| Ambient operating temp. | – 5 °C up to + 45 °C |
| Relative humidity of the gas | 0 … 99 % not condensing |
| Power supply | 110 ... 230 VAC, 24 VDC |
| Protection / Housing / Dimensions | 2x 1/2 19“ cassette, IP 20 |
| Ex-classification | in IP 55 wall mounting housing with inert gas purge also qualified for applications in Ex-Zone 2 |
| Weight | 5 – 7 kg |
| Options | bypass- and purge valve, manual electronic flow control electric / pneumatic gas pump particle filter 2-7µm auto-calibration, also with remote control particle filter 2–7 µm pressure reducer max. 10 bar, out 50 mbar |
| Version: AMS 3186 E V-2019-01 |