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Ultra Sensitive Gas Filter Correlation
N2O Analyzer
The Model 320EU measures trace levels of Nitrous Oxide with excellent accuracy
and stability due to the Gas Filter Correlation principle employed. The sample
concentration is determined by measuring how much
infrared light the gas absorbs as it flows through a multipass sample cell. The
light first passes through a filter wheel that contains an inert gas in one
chamber and a reference concentration of N2O in a second chamber.
After passing through the sample cell the light is detected by an
optically-filtered, dual-stage cooled PbSe detector. As the filter wheel
revolves the energy loss through the sample cell is compared with the span
reference signal provided by the gas filter to produce a signal proportional to
sample concentration, with little effect from interfering gases within the
sample. This design produces excellent zero and span stability, a high
signal-to-noise ratio, high sensitivity and low interferences.
Multi-tasking software gives real time indication of numerous operating
parameters and provides automatic alarms if diagnostic limits are exceeded.
Built-in data acquisition and internal memory allows logging multiple parameters
including average and instantaneous values, calibration data and operating
parameters. Stored data can be retrieved via the RS-232 port, Ethernet
connection, or from the front panel. The Model 320EU features rugged
construction and is designed to perform
with a minimum of attention. In the event maintenance is required, modular
construction makes service a simple operation.
Features
- Standard two year warranty
- Ranges, 0-200 ppb to 0-200 ppm, user selectable
- Gas Filter Wheel for N2O specific measurementt
- GFC wheel guaranteed for 5 years
- Multi-tasking software allows viewing of test variables during operation
- Continuous self checking with alarms
- Bi-directional RS-232 for remote operation
- Digital status outputs indicate instrument operating condition
- Adaptive signal filtering optimizes response time
- No mirrors to clean or adjust
- Optional Calibration Span Valve
| Specifications |
| Ranges: |
0-200 ppb to 0-200 ppm full scale, user selectable |
| Units: |
Dual ranges and auto ranging supported ppm, mg/m3 |
| Zero noise: |
< 5 ppb (RMS) |
| Zero drift: |
< 10 ppb/24 hours, < 20 ppb/7 days |
| Span drift: |
< 0.5% of reading/24 hours; < 1% of reading/7 days |
| Lower Detectable Limit (LDL): |
< 10 ppb (RMS) |
| Rise and Fall Time: |
< 60 seconds to 95% |
| Sample flow rate: |
800 cc/min ±20% |
| Linearity: |
1% of range |
| Operating Temperature Range: |
5 - 40°C |
| Dimensions (HxWxD): |
7" (178 mm) x 17" (432 mm) x 23.5" (597 mm) |
| Weight: |
40 lbs (18.0 kg) |
| Power: |
100V - 120V, 220V - 240V, 50/60 Hz, 250W |
| Analog Outputs: |
10V, 5V, 1V, 100mV, selectable |
| Current Output: |
Optional 4-20mA |
| RS-232: |
Standard, DB-9 connector |
| Status (Digital): |
8 outputs, 6 inputs (opto-isolated), 4 alarm
outputs (optional) |
| Approvals: |
CE |
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