YOKOGAWA Rotamass series User Manual (English)

Questions and Answers:

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Derrick OlsonAug 7, 2025
Why is the zero point unstable on my YOKOGAWA Rotamass Measuring Instruments?
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  cory86Aug 7, 2025
  Several factors can cause an unstable zero point. These include: * Mechanical strain from traction or pressure: Eliminate the source of mechanical tension. * Terminal board or connection terminals of the transmitter or sensor being soiled or damp: Clean the terminal board and connection terminals. Clean and dry the transmitter and/or sensor, and seal them tightly. * Influence of external vibration: Install mechanical dampers or increase the mass flow damping parameter (see the applicable software instruction manual).
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Sara CrossAug 12, 2025
What to do if the field communicator is not detected by YOKOGAWA Rotamass?
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  Linda PatrickAug 12, 2025
  If the field communicator isn't being detected, it could be due to a couple of reasons: * The HART or Modbus DD is not installed: Save the HART or Modbus DD file on the field communicator. * The field communicator is not connected: Connect the field communicator with Rotamass Total Insight; refer to the software instruction manual for guidance.
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John GrayAug 17, 2025
What to do if the display on my YOKOGAWA Rotamass Measuring Instruments transmitter is not functioning?
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  Michael KirkAug 17, 2025
  If the display on the transmitter isn't working, there are a couple of potential causes: * Power supply disconnected: Ensure that the unit is connected to the power supply. * Settings cannot be made via IR switches: Check cable connections between the display and main board, and connect properly if necessary.
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Brandon AlvaradoAug 22, 2025
Why is the zero point unstable on YOKOGAWA Measuring Instruments?
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  Mark CastilloAug 22, 2025
  An unstable zero point can be caused by several factors: * The measuring tube not completely filled with fluid: Ensure the measuring tube in the sensor is completely filled with fluid. Check the installation. * Bubbles or solids in the fluid: Inspect the pipe and sensor installation. * No electrical grounding: Ground the transmitter and sensor, and check the correct connection of the connecting cable shield on the transmitter.
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Bruce McdonaldAug 27, 2025
What to do if settings cannot be made via IR switches on YOKOGAWA Rotamass?
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  Melvin WoodardAug 27, 2025
  If settings can't be adjusted via IR switches, it might be due to incorrect settings in the write-protect menu item. Switch off the write-protect menu item via digital communication or hardware switch.
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seanfisherSep 1, 2025
Why is the zero point unstable on YOKOGAWA Measuring Instruments near electromagnetic fields?
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  Amy NormanSep 1, 2025
  If the flow meter is installed near facilities with a strong electromagnetic field, this can cause an unstable zero point. Ground the transmitter and sensor, and install the flow meter as far away as possible from these electric devices.

YOKOGAWA Rotamass series Specifications

General

Measurement Principle	Coriolis
Repeatability	±0.05% of rate
Communication Protocols	HART, FOUNDATION Fieldbus, Modbus
Material	Stainless steel
Power Supply	24 V DC, 100-240 V AC depending on model
Process Connection	Flanged, threaded, or sanitary (varies by model)
Outputs	4-20 mA, pulse, frequency
Hazardous Area Approvals	ATEX, IECEx, FM, CSA depending on model
Fluid Compatibility	Compatible with liquids and gases (varies by model)
Enclosure Rating	IP67