Description
Master-Touch™ Series 8200MPNH Flow Meters
MPNH Series flowmeters are approved for use in ordinary locations (see specifications)
Insertion style thermal mass flowmeters include a sensor & probe assembly that is inserted into the process gas flow conduit to allow the process gas to flow across the flow sensing elements. Our insertion style flowmeters are available with 1/2″, 3/4″, or 1″ OD probes. Tube fittings and ball valve retractor assemblies, with or without a mounting flange, are also available from the factory as options. The tube length must be specified upon ordering. For other probe diameters and lengths, please consult the factory.
Remote style thermal mass flowmeters utilize two enclosures. One enclosure is mounted at the point of measurement on the flow section or on the probe assembly. This enclosure may be rated for either hazardous environments or for ordinary, non-hazardous environments, as necessary. The second (remote) enclosure is usually placed in a readily accessible location rated for non-hazardous conditions. (Contact the factory for information concerning remote explosion-proof enclosure). The remote enclosure includes the all of the electrical connections as well as the linearizing electronics and the display/keypad assembly. Only a four-wire, twisted-pair cable is required to carry the input power and flow signal between the two enclosures.
Thermal mass flow meters use the principle of convective heat transfer to directly measure mass flow. EPI’s proprietary thermal mass flow sensors use two ratiometrically-matched, reference-grade platinum Resistance Temperature Detectors (RTDs). The platinum sensing element wire is encapsulated in a 316 Stainless Steel sheath or, if specified, a Hastelloy C sheath. Our microcontroller operated smart sensor technology preferentially heats one RTD; the other RTD acts as the temperature reference. The process gas flow dissipates heat from the first RTD, causing an increase in the power required to maintain a balance between the RTDs. This increase is directly related to the gas molecular rate of flow. Our sensors are temperature compensated for a wide process gas temperature range and insensitive to pressure changes, so the output signal is a true mass flow rate signal.
Approvals:
Certified to CSA/CUS Standards: Class 2252-03 & 2252-83 for Process Control Equipment in Ordinary Locations Only; CSA Enclosures Type 4X, IP66
Linear signal output
0–5 VDC & 4–20 mA (Flow and Temperature)
Signal Interface
RS232 & RS485 Modbus RTU embedded, Optional HART or Profibus DP, LCD (flow rate, flow total, gas temperature)
Accuracy, including linearity (Ref.: 21°C)
±(1% of Reading + 0.5% of Full Scale + GTC)
Repeatability
±0.2% of Full Scale
Sensor response time
1 second to 63% of final value
Turn down ratio
100:1 @ 15 SFPM (.076 NMPS) Minimum Reading
Electronics PCB temperature range
-40° to 158°F (-40° to +70°C)
Environmental temperature range
-40° to 140°F (-40° to +60°C)
Gas temperature range
-40°–392°F (-40°–200°C)
Gas temperature coefficient (GTC)
0.02% Full Scale/°C
Pressure rating maximum
500 PSI Std.
Input power requirement
24VDC @ 250mA, 115 VAC 50/60 Hz optional, 230 VAC 50/60 Hz optional
Flow Transmitter power requirements
5 watts maximum
RAM Back-up
Lithium Battery
Wetted materials
316 Stainless Steel (Hastelloy optional)
Standard temperature & pressure (STP)
70°F & 29.92″ Hg (Air .075 lb./cubic foot)
NIST traceable calibration
Standard
* 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.
NOTE: Specifications subject to change without notice.
