A critical
requirement in the ammonia determination is the transportation of the
sample to the analyzer without any losses. Generally, some kind of
sample conditioning equipment is used. However, all these processes can
result in indeterminate sample losses. As in any extractive technique
it is best to transport the sample with heat traced sample lines.
Dilution at the stack does not prevent sample losses.
The minimum detection limit prior to dilution is 0.07 ppm. The actual
minimum detection limit within a sample after dilution depends upon the
dilution ratio but is typically down to 0.3 ppm with a 1:5 dilution.
This configuration allows the direct analysis of ammonia in samples
containing high levels of CO
2 and moisture,
commonly present in any
combustion process. The interference of CO
2 in
the traditional NDIR
ammonia measurements is eliminated by dilution and the cross
compensation feature available within the 1312 (1314).
FEATURES
- Measure five gases simultaneously plus water vapor
- Easy to use
- Virtually no maintenance (no carrier gas required)
- Wide dynamic range
- Extremely stable, requires only annual calibrations
- Interference compensation
SPECIFICATIONS
ANALYSIS METHOD NDIR (Photoacoustic)
RANGE 0.07 to 20,000 ppm
RESOLUTION 0.07ppm*
REPEATABILITY 1% of measured value
LINEARITY 0 to 20,00ppm
CO2 EFFECT Negligible
H2O EFFECT Negligible
RESPONSE TIME Step Change 2 to 3 readings
SAMPLE FLOW RATE 2.0 ±0.5 liters/minute
NOISE Less than detection limit
ZERO ±0.2 ppm/month
AMBIENT TEMPERATURE 5 to 45?C
RELATIVE HUMIDITY Less than 90% RH
SAMPLE TEMPERATURE Up to 190?C
SPAN DRIFT ±2.5% of measured value per month
TEMPERATURE DRIFT ±0.3% of measured value / ?C.
SAMPLE PRESSURE 10 to 30 PSIG with the diluter
DILUTION GAS PRESSURE 10 to 30 PSIG
WARMUP TIME 1 hour
FITTINGS 0.25" tube
POWER REQUIREMENTS 115/230 (±) VAC, @ 50/60 Hz; @ 120 Watts
DISPLAY Vacuum fluorescent
DIAGNOSTICS Internal, self diagnostics
OUTPUT RS 232, IEEE 488
Analog optional (4 to 20 mA DC)
Data Storage Capacity 12 days, monitoring 6 gases every 10 minutes
SOFTWARE Windows 95, 98 and 2000
DIMENSIONS 6.9"H x 15.6" W x 11.8" (175mm x 395mm x 300mm)
WEIGHT 19.8 lbs (9 kg)
MAXIMUM PUMPING RATE 30 cc/sec (flushing sampling tube) and 5 cc/sec
(flushing measurement chamber)
* Before dilution; the actual value depends upon the degree of dilution
