Transmitter: 2400SIA11B2EZZZ which gives 4-20mA output.
I am using above Corriolis mass flow meter for R410A refrigerant flow measurement.
Flowmeter is connected in-between the liquid line between Condenser outlet and Evaporator Inlet.
Condenser ------ Flowmeter ------ Evaporator. (/resized-image/__size/304x406/__key/communityserver-discussions-components-files/39/MicrosoftTeams_2D00_image-_2800_13_2900_.png
Observed that my Condenser outlet pressure is constant when Unit is operated in steady state condition , Flow meter values are varying by 4.5% of range and the Evaporator inlet pressure also varying continuously.
Pressure drop between Condenser outlet and Evaporator inlet pressure is 10Psia.
We have installed a sight glass before flow meter which is indicates clear refrigerant flow without any bubbles.
Also found the other pressures of our air conditioning systems are constant in steady state except evaporator inlet pressure i.e. Flowmeter outlet pressure
Could you please suggest what are all the mounting and other precautions has to be done while installing Coriolis mass flow meter in our setup
This type of troubleshooting would best be handled by contacting our Micro Motion technical support team at firstname.lastname@example.org. My initial guess is that the fluid is warming and flashing during stoppages. Here are a few other comments:
1) In order to achieve the best measurement performance, the meter should be zeroed at process conditions (bring the meter to operating temperature and pressure, block it in, and calibrate zero). However, if flow is stopped and the conditions change, the meter may report a small flow rate (positive or negative). An appropriate low flow cutoff should effectively negate seeing these readings. If the fluid is flashing or has bubbles in it, the flow readings can be erratic, but especially at no flow.
2) If the status light is not green, it means there are informational alerts present. Which alerts are indicated? I would look for A102 (Drive Overrange) or A105 (Slug Flow) if the fluid is outgassing. Refer to Section 7.5 in the 2400S manual for instructions on viewing and acknowledging alerts: www.emerson.com/.../manual-2400s-configuration-use-manual-micro-motion-en-62556.pdf.
3) Also, additional diagnostic variables can be viewed from the display (such as Drive Gain and Density) - which can confirm the presence of gas in your liquid.
Let us know if there's anything else we can do to help,
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