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Gas Filter Correlation N2O
Analyzer
The Model 320E measures 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 multi-pass sample cell. The light is first
coupled 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 isdetected 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 and 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. Up to 999,999 records of stored data can be retrieved via the RS-232
port, Ethernet connection, or from the front panel. The Model 320E 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, 0-1 to 0-1,000 ppm, user selectable
- Gas Filter Wheel for N2O specific measurement
- 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: |
0-1 ppm to 0-1000 ppm full scale, user selectable |
| Units: |
Dual ranges and auto ranging supported ppm, mg/m3 |
| Zero noise: |
< 0.02 ppm (RMS) |
| Zero drift: |
< 0.1 ppm/24 hours, < 0.2 ppm/7 days |
| Span drift: |
< 1% of reading/7 days |
| Lower Detectable Limit (LDL): |
< 0.04 ppm |
| Rise and Fall Time: |
< 60 seconds to 95% |
| Sample flow rate: |
800 cc/min ±10% |
| 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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