ValuMass™ 540 Insertion Thermal Mass Flow Meter

Series 5xx ValuMass™ flow meters offer a lower cost option for many flow applications with the high value associated with all of EPI’s flow measurement instrumentation.

This series meter includes an industrial explosion proof enclosure. (CE Mark)

Description

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Remote feature option below comes with the remote enclosure and mounting bracket. Cable from the flow element transmitter to the remote enclosure enters at the bottom of the bracket piping.

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500 Series  ValuMass Flowmeters

Eldridge Products, Inc. has achieved innovation and excellence in thermal dispersion gas mass flow measurement since 1988. With an economical set of features and a number of common configuration and installation choices, our newest ValuMass™ flowmeters continue our tradition of solving flow measurement challenges for customers around the world.

ValuMass™ Series 500 Flowmeters

Eldridge Products, Inc. (EPI) is a proven leader in gas flow measurement. Our Master-Touch™ thermal dispersion gas mass flowmeters and patented Flow Averaging Tubes set the standard for innovation, performance and reliability. Now our Series 500 ValuMass™ flowmeters offer a lower cost option for many flow applications with the high value associated with all of EPI’s flow measurement instrumentation.

The Series 500 ValuMass™ flowmeters include 16-bit linearization technology for excellent flow rate accuracy and rugged construction of 316L stainless steel wetted parts. The robust feature set includes:

  • 0 – 5 or 0 – 10 VDC output, flow & temperature
  • 4 – 20 mA output, flow & temperature
  • Frequency output 0 – 1 kHz proportional flow
  • Programmable event relay(s) one 1 amp with frequency out two 1 amp without frequency out
  • Protocols – RS232; RS485 Modbus RTU; BACnet
  • Optional Protocols – HART, Profibus DP
  • Display 2-line, 16-character backlit LCD and 4-button keypad

Our ValuMass™ Series 500 inline and insertion style flowmeters accommodate virtually all common installation requirements. The insertion style flowmeters are available with ½” OD probes in 6” to 36” lengths, ¾” probes to 60” lengths. The inline style flowmeters are available for pipe sizes from ¼” to 2”. The 3 ½” long flow sections have MNPT ends as standard for easy mounting in the process line. ValuMass™ flowmeters accept 24VDC, 115VAC or 230VAC input power as specified at the time of purchase.

EPI’s thermal dispersion flowmeters are solid state instruments that use the principle of convective heat transfer to directly measure gas mass flow. EPI’s sensors consist of two matched reference grade resistance temperature detectors (RTD’s). A microcontroller preferentially heats one sensor; the other sensor acts as a control temperature reference. The gas flow dissipates heat from the heated sensor, in either Constant Temperature Anemometer (CTA) mode for dry-gas operation or Constant Current Anemometer (CCA) mode for wet-gas operation, preset by factory. This heat dissipation is directly related to the gas molecular rate of flow.

Our sensors are temperature compensated and insensitive to pressure changes for direct output readings, so no additional instrumentation or calculations are required. The output signal is a true mass flow rate signal which can be directly interfaced with your data acquisition system.

Linear signal output ……………………………………………… 0–5 VDC & 4–20 mA (Flow and Temperature)
0 – 1 kHz (proportional to flow for total/counter)

Event Relay Rating…………………………………………………. One with Frequency or two, 1 Amp @ 30VDC (33W)

Signal Interface……………………………………………………… RS232 & RS485 Modbus RTU embedded
Optional HART or Profibus DP or BACnet

Display…………………………………………………………………… Optional 2-line, 16-character backlit LCD and 4-button keypad (flow rate, flow total, gas temperature, milliwatts)

Accuracy, including linearity (Ref.: 21°C)………………. ±(1% of Reading + 0.5% of Full Scale + GTC)

Repeatability………………………………………………………….. ± 0.2% of Full Scale

Gas temperature coefficient (GTC)……………………….. 0.02% Full Scale/°C

Dry Gas – Sensor Type CTA ……………………………………. SSS, CTA (Constant Temperature Anemometer)

Sensor Response Time (TC to 63% final value)……… 1 second (sensor skin temperature varies)

*Wet Gas – Optional Sensor Type CCA………………….. SSS, CCA (Constant Current Anemometer)

Sensor Response Time (TC to 63% final value)……… 10 second (sensor thermal mass temperature varies)

Turn down ratio…………………………………………………….. 100:1 @ specified accuracy, Min. Rdg. 15 SCFM/FT^2 (4.6 NCMM/M^2)

Sensor temperature limits…………………………………….. -40° to 400°F (-40° to 204°C), temperature compensation range determined at time of order

Environmental temperature limits………………………… -40° to 140°F (-40° to 60°C)

Electronics PCB temperature limits……………………….. -40° to 158°F (-40° to 70°C)

Gas pressure effect……………………………………………….. Negligible over ± 20% of absolute calibration pressure

Inline Flowmeters………………………………………………….. 500 PSIG

Insertion Flowmeters…………………………………………….. 500 PSIG (Stainless Steel ferrule)
25 PSIG (Teflon™ ferrule)

Input Power Requirement…………………………………….. 24 VDC @ 250mA
115 VAC 50/60 Hz 100mA optional
230 VAC 50/60 Hz 50mA optional

Transmitter Power Requirements…………………………. 5 Watts or less

Wetted Materials …………………………………………………. 316L Stainless Steel (optional Hastelloy C276)

Standard Temperature & Pressure (STP)………………. 70°F & 29.92″ Hg (Air = 0.075 Lbs./FT^3)

NIST Traceable Calibration …………………………………… Standard

Enclosure Marking Only………………………………………… Ex; IECEx; CSA, FM – Ex II2G Ex d IIC Gb, Ex IID Ex t IIIC Db; Classes: 1, Gr. A, B, C, D; II, Gr. E, F, G; III Type 4X; IP68 (sealed per Mfg. Ins.); Zone 1, Zone 2, Zone 21, Zone 22, Division 1, Division 2

Product Marking……………………………………………………. CE Mark, no other markings or certifications

The accuracy specification applies to the instrument only. EPI is not responsible for measurement errors due to flow profile irregularities caused by installation piping configurations, corrosion on inner pipe surfaces, valve placement, etc.

Specifications subject to change without notice

*Wet-Gas CCA, consult factory for review of application to determine if required.