Instructions for Use
– SCHMIDT
®
Flow Sensor SS 20.600
Page 37
10 Technical data
Measurement-specific data
Measuring values
Standard velocity w
N
based on standard conditions of
20 °C and 1,013.25 hPa
Temperature of medium T
M
Medium to be measured
Standard: Air or nitrogen
Optional: Natural gas, biogas, CO
2
and special gases
or gas mixtures
Measuring range w
N
Standard: 0 ... 10 / 20 / 60 / 90 / 140 / 220 m/s
Special:
10
… 220 m/s (steps: 0.1 m/s)
Lower detection limit w
N
0.2 m/s
Measuring range T
M
Standard / O
2
version: -20 ... +120 °C
ATEX version:
-40 ... +120 °C
Measuring accuracy
Standard w
N
±3 % o. m. v. + (0.4 % o. f. v.; min. 0.08 m/s)
24
High precision w
N
±1 % o. m. v. + (0.4 % o. f. v.; min. 0.08 m/s)
24
(only for air, nitrogen, oxygen)
Response time (t
90
) w
N
1 s (jump of w
N
from 0 to 5 m/s in air)
Temperature gradient w
N
< 8 K/min (at w
N
= 5 m/s)
Recovery time constant
< 10 s (
temperature jump Δ
ϑ
= 40 K at w
N
= 5 m/s)
Measuring accuracy
25
T
M
±1 K (10 ... 30 °C)
±2 K remaining measuring range
Operating temperature
Sensor probe
Standard:
-20
… +120 °C
O
2
version:
-
20 … +60 °C
ATEX version: -40 ... +120 °C
Electronics
-
20 … +70 °C
Storage temperature
-
20 … +85 °C
Material
Enclosure
Anodized aluminum
Sensor tube
Stainless steel 1.4571
Compression fitting
Stainless steel 1.4571, NBR (or FKM)
Sensor head
Platinum element (glass passivated)
Standard: PPO / PA
Option:
Stainless steel 1.4571 with Parylene coating
Sensor cable (remote sensor)
Sheathing TPE, halogen-free
24
„o. m. v.“: of measured value; „o. f. v.“: of final value; under reference conditions
25
w
N
> 2 m/s
