Thermal Mass Flow Meters

Sage General Usage

Overview

Flow Meter is thermal dispersion type, utilizing constant temperature difference method of measuring Gas Mass Flow Rate.

It contains two reference grade platinum RTD sensors clad in a protective 316 SS sheath. Features direct Mass Flow for gases, wide rangeability, low pressure drop, very low end sensitivity, and no moving parts. Flow Meter is microprocessor based, does not have any potentiometers, and has RS232 communications with accompanying menu driven software (Sage VIP). Flow Meter is powered by 24 VDC or 115 VAC/ 230 VAC. The power dissipation is under 8 watts (e.g. under 350 ma at 24 VDC).

Electronics is with NEMA 4X Windowed Enclosure, Local Display and Touch Screen Display Keypad. The Display is a back-lit LCD with two lines of information: Mass Flow Rate on top line; and Totalized Flow and Temperature on bottom line. The Touch Screen Keypad has 4-buttons (accessible without needing to remove the cover) and provides a convenient means to interface with an extensive menuing system. The electronics has a 4 to 20 ma output proportional to Mass Flow Rate as well as a 4 to 20 ma output proportional to Temperature. Outputs are opto-isolated. In addition, two dry contact relays are provided that can be configured for pulsed outputs of Totalized Flow, or Trip High, Trip Low, and other functions.

Feature

• 24 VDC with current dissipation of less than 350 ma with backight on (less than 250 ma with backlight off), or 115VAC/230 VAC
• 2-Line Backlit Touch Screen Display and 4 Button Menuing Keypad
• Displays Flowrate, Totalized Flow and Temperature
• 4-20 ma isolated output of Flow Rate, and 4-20 ma Flow Rate of Temperature
• Two dry contact Relays suitable for Pulsed Outputs of Totalized Flow or configurable to Trip High or Trip Low
• RS232 Communication and Menuing Software (Sage VIP)
• Optionally available with up to four totally independent calibrations (Channels A through D). Meter can be calibrated with four different gases, four different configurations, or even four different sensitivities, or any combination of the above.
• Accuracy of +/- 1% of Reading +/- 0.5% of Full Scale per Channel
• Zero Calibration Self Check Diagnostics
• Common Units of Flow Measurement: SCFM, SCFH, SCFD, SCCM, NCMM, NCMH, KG/S, KG/M, KG/H, KG/D, LBS/S, LBS/M, LBS/H, LBS/D, SLPM, SLPH
• Common Units of Totalized Flow: SCF, SCF, SCC, NCM, KG, LBS, SL
• Common Units of Velocity: SFPM, SFPS, NMPM, NMPS, NMPH
• Temperature Units: °C and °F

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