# A Measurement Setup

<table data-header-hidden><thead><tr><th width="92">No.</th><th width="164">Name</th><th>Description</th></tr></thead><tbody><tr><td><strong>No.</strong></td><td><strong>Name</strong></td><td><strong>Description</strong></td></tr><tr><td>A02</td><td>Preset Pipe Spec</td><td>Select the pipe standard used by the flowmeter. Default: custom.</td></tr><tr><td>A03</td><td>Pipe Geo. Unit</td><td>Set the pipe unit. Default: mm.</td></tr><tr><td>A04</td><td>Pipe OD</td><td>Set the pipe outer diameter. Default values vary depending on the selected pipe unit.</td></tr><tr><td>A05</td><td>Pipe Perimeter</td><td>Set the pipe circumference. Default values vary depending on the selected pipe unit.</td></tr><tr><td>A06</td><td>Pipe thickness</td><td>Set the pipe wall thickness. Default values vary depending on the selected pipe unit.</td></tr><tr><td>A07</td><td>Pipe ID</td><td>Set the pipe inner diameter. Default values vary depending on the selected pipe unit.</td></tr><tr><td>A08</td><td>Pipe Material</td><td>Set the pipe material. Default: custom.</td></tr><tr><td>A09</td><td>Pipe Soundspeed</td><td>When A08 is customized, you can manually set the sound velocity of the pipe, and the unit is set in B04. </td></tr><tr><td>A10</td><td>Liquid Type</td><td>Set the liquid type. Default: custom.</td></tr><tr><td>A12</td><td>Liquid Soundspeed</td><td>Set the liquid Soundspeed. Default: custom.</td></tr><tr><td>A13</td><td>K.Viscosity cst</td><td>Set the fluid dynamic viscosity. Default: 1.</td></tr><tr><td>A15</td><td>Damping</td><td><p>A15 Damping: Smooths flow measurement data. Default: 3.</p><p>Higher value → smoother display, smaller fluctuations, slower response.</p><p>Lower value → faster response, more sensitive to flow disturbances, larger fluctuations.</p></td></tr><tr><td>A16</td><td>Direction</td><td>Reverse flow definition. Default: normal flow.</td></tr><tr><td>A17</td><td>Neg Flow (Negative Flow)</td><td>Enable display of reverse flow. Default: on.</td></tr><tr><td>A18</td><td>Low flow cutoff</td><td>Low-flow cutoff: displays flows below the set value as zero. Default: 0 (off).</td></tr><tr><td>A19</td><td>Fast Update</td><td>Screen refresh rate: allows updates every 0.5 s. Default: off.</td></tr><tr><td>A20</td><td>Anti-Noise</td><td>Noise elimination for unstable measurements. Default: on, can be disabled.</td></tr><tr><td>A21</td><td>Auto Initialization</td><td>Auto-detect fluid ultrasonic velocity to complete environmental parameter setup after installation and parameter configuration.</td></tr><tr><td>A22</td><td>Auto Zero Offset</td><td>Auto zero calibration: resets the flowmeter output to zero. Recommended for very low flow measurement to correct zero offset errors.</td></tr><tr><td>A23</td><td>Zero Offset</td><td>Manual zero compensation: corrects internal system time offset. Unit: ns (not a flow unit). Refer to the value on the User Debug Page and input into A23.</td></tr><tr><td>A26</td><td>Beta Mode</td><td>A26: Default off. Not fully tested; do not enable.</td></tr></tbody></table>


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