Admin; How To Zero - 3DATX parSYNC User Manual

3.3.4

Admin

The Admin sub-tab under the Config tab is not meant for the user and is only for use by the developers
of the parSYNC® system. This tab is useful when someone from 3DATX needs to troubleshoot a data
acquisition issue for a remote user.
Do NOT make any changes to the values and settings in the Admin tab

3.4 How to Zero

After a connection is established, the typical requirement is to zero the parSYNC® hardware. The zeroing
process calibrates the sensors and sets them to clean air (also called zero air). Ideally, the user would
calibrate with a true zero air cylinder. However, for typical test requirements, sampling with clean
ambient air, either as is or passed through a HEPA filter, is sufficient for zeroing purposes.
Be careful not to sample dirty ambient air or tail pipe air during the zeroing process because this will
lead to a bad zero calibration and all measurements, until a good zero calibration is conducted, will be
biased low. For example, if the sample gas has 20 ppm NO during zeroing but the zeroing concentration
is set to 0 ppm NO, then all future measurements with 20 ppm NO will be recorded as 0 ppm NO (and 30
ppm NO will be recorded as 10 ppm NO, and so on).
• Connect the parSYNC® sampling line to clean ambient air or a zero-calibration gas
Set the "Zero Time Max" to a suitable number of seconds. The default is 30 seconds
•
• Start sampling by clicking on the "Zero Start" button
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