Operating Instructions FLOWSIC100
Gas Velocity Monitor
Product Description
8012513/03-2008 © SICK MAIHAK GmbH · Germany · All rights reserved 43
2.5.2 Span Test
At the electronic zero point test, the time difference between both directions of signal
transmission is generated. It is calculated with the installation parameters gas temperature,
measuring distance and speed of sound and a velocity offset is calculated at the zero point
This offset is added to the chosen span value and is output. The span value can be set to
between 50 and 70 % in steps of 1 % using the SOPAS ET operating software (factory setting
70 %).
If all of the system components are intact, the entire measuring system will respond in the
prescribed manner.
2.5.3 Check Cycle on the Analog Output
A check cycle is output as follows:
• 90 s zero value (live zero)
• 90 s span value
Note: • The output duration of 90 s is the default factory setting. It can be changed with the
SOPAS ET operating software (see Section 4.2.2).
• This output is only expedient for measured values that depend on velocity (gas velocity,
volumetric flow under actual conditions, volumetric flow under standard conditions).
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