12
User Manual EE680
Air Velocity and Temperature Sensor for Laminar Flow
5.4.2 Lower Limit for the Air Velocity Measurement
Menu Item
Configurable Items
Low-flow cut-off
Conditions for switching off and on measurement at low air velocity
Fig. 11
Value setting for low-flow cut-off
The Low-flow cut-off can be switched on or off and the threshold together with a hysteresis value can
be defined. Measurement of the standardized air velocity is stopped below the “switch off” value and
resumed as soon as the “switch off” value plus the hysteresis is exceeded.
5.4.3 Reference Values for the Standardized Air Velocity
Menu Item
Configurable Items
Process parameters
Temperature and barometric pressure reference values for standardized air velocity
calculation
Fig. 12
Standard reference values setting
For the measurement of the standardized air velocity, the EE680 uses the temperature and barometric
pressure values defined in this section. The factory settings are 23 °C
(73 °F)
and
1 013.25 hPa
(14.7 psi)
.
