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AM1000 User Manual
result in a very unreliable data output. Please filter or other tools to prevent this situation to occur
when using this product.
8.2.3. Metrology verification
Testing the products with local metrology tools will be performed in almost all cases. It should be
noted that for this particular sensor, special care should be applied while performing such a task.
The gauge pressure tests are relatively simple, as long as the pressure is tested under a stable media
condition, the metrology data should be well reproduced.
For the mass flowrate comparison, however, in addition to the flow system setup conditions
recommended by OIML R137, a stable flow system must be ensured. This is because the current
product is designed for a small pressure loss, therefore the sensor does not have a strong flow
restrictor or conditioners to handle the flow instability that may exist in the system. Therefore to
compare the metrology data, the user should ensure the system is stable, otherwise, the output
could be noisy and metrology deviations would be inevitable. If such cases are present, please
contact the manufacturer for further solutions.
For temperature and humidity measurement, because of the small package space, the response of
the humidity could be slower than the specified. For additional information, please contact the
manufacturer.
8.2.4. Blockage effect for an insertion meter
As the product probe has a certain size, when the probe is inserted into a flow channel and its size is
no longer small enough compared with the flow channel size, the blockage effect has to be taken
into account when calculating the mass flow rate that the insertion meter measures. For the detailed
information, please contact the manufacture for the technical while paper.