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 THE NEED
The requirements of this measurement vary from country to country, and from state to state. In some cases, volumetric measurements are required and in others, mass measurement. Flexibility in system design is essential in a rapidly changing environment. This is just one advantage of the preferred wet basis, extractive measurement. It can be combined with either diluent or flow measurement to meet the standard you need.
DIRECT MEASUREMENT
The simplest systems are the most reliable. That's why a direct UV absorption measurement is used, coupled to a hot, wet, extractive sample system. This means that sample gas is maintained at a temperature above the dewpoint at all times, and does not need complicated dilution or drying systems. Field proven in hundreds of installations worldwide; all systems have been certified.
THE ANALYZER
AMETEK's Model 4600 is a unique, split-beam, single cell UV analyzer that is highly stable and essentially drift free. This means that complications of automatic gain and lamp current controls are eliminated. Using high energy metallic vapor emission lines gives higher accuracy, linearity, and dynamic range than broadband source and interference filter systems. The rugged analyzer does not use a photomultiplier detector with high voltage power supplies, has no moving parts, and has a wide tolerance of ambient conditions negating the need for air conditioning.
BENEFITS
- Guaranteed to meet federal and state certification requirements.
- Available in wet or dry basis, mass, volumetric, and zero diluent configuration.
SPECIFICATIONS
- Repeatability: ± 0.5percent full scale
- Accuracy: ± 2 percent full scale
- Output Signal: 4 to 20 mA, linear, isolated, 600-ohm load
- EMI Effects: <1 percent change in output
- Hazardous Area: Field unit meets U.S.A. and European explosion-proof standards
- Utilities: 2 kVa, all worldwide power supplies acceptable. Instrument air: 140 to 700 kPa (20 to 100 psig), at 4 m3/hr, (120 ft3/hr)
| SPECIFICATIONS |
| Methodology: |
Non-dispersive ultraviolet |
| Measurement Range: |
0 to 1% SO2, 0 to 2% H2S, -1 to 1% excess H2S typically (0 to 2% SO2 / 0 to 4% H2S optional) |
| Accuracy: |
H2S and SO2: ±2% of full scale |
| Sensitivity: |
±0.15% full scale |
| Reproducibility: |
±1% of full scale |
| Speed of Response: |
90% in less than 15 seconds, typical |
| Sample Flow: |
2 LPM typical |
| Ambient Temperature: |
-20ºC to 50ºC (-4ºF to 122ºF) |
| Utilities Electrical: |
120/240 VAC 50/60 Hz 720W, single phase |
| Instrument Air: |
490 to 700 kPa (70 to 100 psig ) |
| Steam Pressure: |
For optional ball valve jacket: 515 to 690 kPa (75 to 100 psig)
For optional blow back: 210 to 345 kPa (30 to 50 psig) |
| Outputs: |
Three (3) 4-to-20 mA, self-powered, linear, 1200 ohms load proportional to H2S,
SO2, and either Excess H2S or Ratio
One (1) digital, System Alarm incorporates concentration, overrange, system
errors, and Watchdog alarm (30 Vac, 60 Vdc, 50 VA, maximum, resistive load)
One (1) digital, Data Valid Signal (30 Vac, 60 Vdc, 50VA, maximum, resistive
load)
RS-485 Serial Communication Port, half duplex, two-wire |
| Inputs: |
One (1) digital input for remote auto calibration, contact closure, 5 Vdc @ 2.5 mA
One (1) digital input for remote blowback, contact closure, 12 Vdc @ 100 mA
Note: Provide isolated contact closure only. Do not apply voltage. |
| Digital Communication: |
RS485 serial port. Remote dial-in capabilities available with AMETEK Western Research software |
| Noise: |
±0.5% full scale |
| Zero Drift: |
Less than ±0.5% of full scale in 24 hours through periodic automatic zero standardization using instrument air |
| Calibration: |
Automatic with span filter, manually operated from the controller |
| Process Sample Pressure: |
Not critical |
| Customer-Supplied Items: |
2 in.-150 lbs. or DIN equivalent RF stainless steel flange connection |
| Enclosure Material: |
316 stainless steel |
| Approvals and Certifications: |
UL/CSA General Safety Requirements
UL/CSA Class I, Division 2, Groups A, B, C, D
ATEX II 2 G, EEx p mde [ib] IIC T3
Complies with all relevant European directives
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| Physical Dimensions: |
(H x W x D): 950 x 1037 x 305 mm (37.3 x 41 x 12 inch) |
| Approximate Weight: |
115 kg (250 lbs.) |
- UL/CSA General Safety Requirements
- UL/CSA Class I, Division 2, Groups A, B, C, D
- ATEX II 2 G, EEx p mde [ib] IIC T3
- Complies with all relevant European directives
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