Micropilot M FMR56

Summary

Product identification

• Product Line: Level measurement
• Product Name: Micropilot M FMR56, FMR57
• Type: Free-space radar

Application

• Continuous, non-contact level measurement in powdery to granular bulk solids.
• PP-cladded horn antenna (FMR56); horn or parabolic antenna (FMR57).
• International explosion protection certificates.
• Linearity protocol (3-point, 5-point).

Operating Limits

• Process Temperature: –40 to +400 °C (–40 to 752 °F)
• Process Pressure: –1 to +16 bar (–14.5 to +232 psi)

Input

• Measured Variable: Distance from the reference point (process connection) to the product surface. Level is calculated based on the entered empty distance "E".
• Measuring Range:
  • FMR56: Maximum 30 m (98 ft)
  • FMR57: Maximum 70 m (230 ft)
• Operating Frequency: K-band (~ 26 GHz)
• Transmission Power:
  • 1 m (3.3 ft): < 64 nW/cm²
  • 5 m (16 ft): < 2.5 nW/cm²

Output

• Output Signal:

  • HART: FSK ±0.5 mA over current signal, 1200 Bit/s, Galvanic isolation: Yes.
  • Bluetooth® wireless technology: Via SmartBlue app. Range > 10 m (33 ft). Encrypted communication.
  • PROFIBUS PA: Manchester Bus Powered (MBP), 31.25 kBit/s, Voltage mode, Galvanic isolation: Yes.
  • FOUNDATION Fieldbus: Manchester Bus Powered (MBP), 31.25 kBit/s, Voltage mode, Galvanic isolation: Yes.
  • Switch output (optional for HART): Open collector, binary switching, failure mode: Non-conductive. Electrical connection data: U = 16 to 35 VDC, I = 0 to 40 mA. Internal resistor Rᵢ < 880 Ω. Insulation voltage: 1350 VDC (relative to power supply), 500 VAC (to ground).

• Signal on Alarm:

  • Current output: Configurable failure mode (NAMUR NE 43: Minimum alarm 3.6 mA, Maximum alarm 22 mA, or user-configurable 3.59 to 22.5 mA).
  • Local display: Status signal (NAMUR NE 107), plain text display.
  • Operating tool: Status signal (NAMUR NE 107), plain text display.

• Linearization: Up to 32 points, manual or semi-automatic entry, for converting measured values to length or volume units. Preprogrammed tables for cylindrical and horizontal cylindrical vessels.

Power Supply

• 2-wire, 4-20mA HART, passive: Terminal voltage 10.4 to 35 VDC (depending on approval and ambient temperature). Maximum load R depends on supply voltage U₀.
• 4-wire, 4-20mA HART, active:
  • 90 to 253 VAC (50 to 60 Hz), Category II. Max load 500 Ω.
  • 10.4 to 48 VDC. Max load 500 Ω.
• PROFIBUS PA, FOUNDATION Fieldbus:
  • Non-Ex: 9 to 32 VDC.
  • Ex ia / IS: 9 to 30 VDC.
• Power Consumption: Varies by model (e.g., < 0.9 W for 2-wire HART, 6 VA for 4-wire 90-253VAC).
• Current Consumption:
  • HART: 3.6 to 22 mA nominal.
  • PROFIBUS PA: 14 mA nominal.
  • FOUNDATION Fieldbus: 15 mA nominal.

Mechanical Construction

• Dimensions: See official PDF.
• Weight: See official PDF.
• Materials: Housing options include stainless steel (GT18), plastic (GT19), and die-cast aluminum (GT20). Antenna and process connection materials vary.

Performance Characteristics

• Reference Operating Conditions: Temperature +24 °C (±5 °C), Pressure 960 mbar abs. (±100 mbar), Humidity 60% (±15%).
• Maximum Measured Error:
  • Digital output: ± 3 mm (± 0.12 in) sum of non-linearity, non-repeatability, hysteresis; ± 4 mm (± 0.2 in) offset/zero.
  • Analog output: ± 0.02 % span (non-linearity, etc.); ± 0.03 % span (offset/zero).
• Measured Value Resolution:
  • Digital: 1 mm
  • Analog: 1 μA
• Response Time: Varies with tank height and sampling rate, typically < 0.8 s for < 10 m tank height.
• Influence of Ambient Temperature:
  • Digital: Average TC = 3 mm/10 K.
  • Analog: Zero point average TC = 0.02 %/10 K; Span average TC = 0.05 %/10 K.

Certificates and Approvals

• CE mark, RoHS, RCM-Tick, Ex approval, SIL2/SIL3, WHG, Marine approval, Radio standards (EN 302729, FCC, Industry Canada, Japanese), CRN approval.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror