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3098 Technical Manual Specification
6-1
Chapter 6
Specification
6.1 3098 Specification
Note: Some parts of this specification (marked with ‘*’) cannot be guaranteed for 3098 meters supplied without an IP-rated
enclosure (see Important Notice on page 1-1).
6.1.1 Performance
Specific Gravity limits: 0.1 - 3 (typical).
Fluid: Dry, clean, non-corrosive gases.
Accuracy: Up to ± 0.1% reading. *
Repeatability: ± 0.02% reading. *
Temperature Coefficient: ± 0.005%/ºF (± 0.01%/°C). *
Temperature range: -22 to +122°F (-30 to +50°C), or as limited by gas dew point.
Control Pressure at 20°C: 1.2 to 7 bar absolute (17 to 101 psia).
Supply Pressure: Minimum: Control pressure + 15%
Maximum: Control pressure + 100%, up to a maximum of 12 bar absolute.
Gas Flow rate: 0.012 to 3.66in
3
/s (0.2 - 60 normal cm
3
/s).
Response Time: < 5 seconds upon entry into enclosure with flow at 3.66in
3
/s (60 normal cm
3
/s). *
Output Signal: Nominal 6V peak-peak for 3 wire system.
2-3V peak-peak across 330Ω resistor for two-wire system.
Operating frequency range: (1960 ± 10%) Hz at 0 kg/m
-3
(1580 ± 10%) Hz at 60 kg/m
-3
Built-in Filter: 7 μm.
Calibration: By gas samples of known specific gravity.
6.1.2 Electrical
Power Supply: +15.5 to 33Vdc.
Electromagnetic Compatibility: Approved to BS EN 50081-2 and BS EN 50082-2.
6.1.3 Mechanical *
Gas Connections: Swagelock compression fittings for ¼” (6.35mm) O/D pipe.
Enclosure Rating: Meter rated to IP65 when mounted in enclosure.
Enclosure Dimensions: (See drawings in Section 2.7 of chapter 2).
Enclosure Weight: Small (3098E): 20lb (9kg) approx. nett, Gross weight (packaged) 53lb (24kg).
Large (3098G): 77lb (35kg) (approx.) nett, Gross weight (packaged) 99lb (45kg).
Materials: Process gas must be compatible with Ni-Span-C902, Stainless Steel AISI 316,
Stycast catalyst 11 and 6082 grade Aluminium alloy.
* - only valid for meters supplied with IP-rated enclosure - see Important Notice on page 1-1.
6.1.4 Safety
See 3098 ATEX safety instruction booklet (30985018/SI) and PED safety instruction booklet (30988002/SI).