Instructions for use SS 20.515
Page 4
2 Application range
The
SCHMIDT
®
Flow sensor SS 20.515
(article number: 524515) is
designed for stationary measurement of the flow velocity and air and gas
temperatures at atmospheric pressure conditions (700 ... 1300 hPa).
The sensor is based on the measuring principle of the thermal anemom-
eter. It measures the mass flow of the measuring medium as flow veloci-
ty, which is output in a linear way as standard velocity
1
w
N
, based on
standard conditions of 1013.25 hPa and 20 °C. Thus, the resulting out-
put signal is independent of the pressure and temperature of the medium
to be measured.
The sensor is designed for the use inside closed rooms and is not suita-
ble for outdoor use.
3 Mounting instructions
General information on handling
The flow sensor
SS 20.515
is a sensitive measuring instrument. This is
why applying mechanical force to the sensor tip should be avoided.
The sensor tip can be damaged irreversibly due to mechanical
loads.
Leave the protective cap as long as possible attached during
mounting and handle the sensor with care.
For applications with an uncontrollable risk of touch, a special safety
strap can be mounted on the sensor (optional accessory: 531026).
Flow characteristics
To avoid false measurement results, appropriate installation conditions
must be guaranteed to ensure that the gas flow is supplied to the sensor
in a quiet (low in turbulence) state.
Correct measurements require a quiet flow low in turbulence.
1
Corresponds to the actual velocity under standard conditions.
!
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