Chapter 4. Specifications
42 DigitalFlow™ GF868 Startup Guide (1 and 2-Channel)
4.1.5 Molecular Weight and Mass Flow Accuracy (% of Reading)
Molecular Weight (hydrocarbon mixtures):
MW 2 to 120 g/mol.
1.8%, optimizable for other gas composition
Mass Flow (hydrocarbon mixtures, typical):
1-path: 3 to 7%
2-path: 2.4 to 5%
Note: Dependent on accuracy of temperature and pressure inputs.
4.1.6 Rangeability
2750:1
4.1.7 Repeatability
1% at 0.5 to 100 ft/s (15 cm/s to 30 m/s)
4.2 Electrical Specifications
4.2.1 Power Supply
Input Options:
100 to 130 VAC, 50/60 Hz with 1.0 A Slo-Blo Fuse
200 to 265 VAC, 50/60 Hz with 0.5 A Slo-Blo Fuse
12 to 28 VDC with 3.0 A Slo-Blo Fuse
4.2.2 Power Usage
20 W maximum
4.2.3 Protection
Built-in mains power surge/lightning protection.
4.2.4 European Compliance
This unit complies with EMC Directive 2004/108/EC and 2006/95/EC Low Voltage Directive (Installation Category II,
Pollution Degree 2), and PED 97/23/EC for DN<25.
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