Additional Information on the ADM Flowmeter Reading Zero

The ADM Flowmeter has a useable measurement range of 0.5mL to 1000mL. As stated in a prior blog entry, the meter will only read zero if the sample tube is plugged and the meter is in a quiet setting. However; the stated accuracy of the ADM after calibration is 3% or +/- 0.2mL whichever is greater. So if the meter were to read 0.19mL when one is testing for zero, it is probably not a cause for concern.

Because the meter has such a low range of measurement, the transducer is sensitive to overflow conditions, i.e. connecting the ADM to a source above 1000mL per minute. A mild overflow will generally not have much effect on the meter, while a major overflow will cause the meter to continually read zero or throw the readings off to the point it is clearly detectable by the operator.

Feel free to call us if you have further questions or visit our website, http://www.cic-inc.com .

To view the ADM1000 flowmeter at Agilent’s website use this link http://www.chem.agilent.com/en-US/products/consumables/gasmanagement/adm1000flowmeter/pages/default.aspx

For questions on annual calibration, repairs, and other questions on meter operation, you may contact California Integration Coordinators, Inc. at http://www.cic-inc.com/ or call 530-626-6168 and ask for the Calibration Lab.