Resistance value of the 9-pin connector on Rosemount mass flow meter CMF series sensors
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This post was last edited by dennyshen2549 on 2015-8-31 21:52. Mass flow meters are widely used in our actual production processes. The well-known brand in this area is Rosemount. Now let’s discuss what the resistance values should be for these thermistors, drive coils, and sensing coils under normal conditions. Those who have relevant information can share it so that we can all discuss it together.
An RTD resistor sees its resistance value change with temperature; in fact, it is a PT100； The other 3 groups are the drive coil and the left/right detection coils; their resistance values vary depending on the model, but regardless of the model, the resistance values of the left/right detection coils should be quite similar (with a difference of within 5 Ohms) ； All RTDs and coil pairs must be well insulated from the housing.
Yes, but what I really need are the values for each series, like those for CMF400.
CMF400 SPECIFICATIONS. DRIVE: 130~150 Ohms； LPO/RPO: 334~385 Ohms ； RTD: 100+ Ohms ； RTD RET: 0.01~3Ohms.
Good, do you have any reference values for other series as well?