Technical Data
42/14-36 EN
Thermal Mass Flowmeter FMT400-VTS, FMT400-VTCS (Sensyflow VT-S/VT-CS)
31
10 Technical Data
Parameter setting
The output signal range of the FMT400-VTS/VTCS flowmeters can be set to either 0...20 mA or
4...20 mA. Additionally, the measuring range window can be extended such that a smaller span corre-
sponds to a 20 mA current signal. Alarm signalling is possible at < 3.5 mA or > 22 mA (selectable).
The measuring instrument parameters can be set via the LKS-adapter. A standard PC or laptop allows
you to change the used output signal and to adjust the measuring range.
Type
FMT400-VTS
FMT400-VTCS
Hygienic version
Application
Process engineering
Food and beverage industry
Measured variable (measured gases)
Flow rate of gases and gas mixtures with known
composition
Flow rate of air, N
2
, CO
2
, O
2
Measuring ranges
Nominal sizes
DN 25
DN 40
DN 50
DN 80
DN 100
DN 150
DN 200
up to 3000 mm
q
min
q
max
0
(1.6)
... 160
0
(4)
... 430
0
(7)
... 700
0
(17)
... 1,700
0
(30)
... 3,000
0
(80)
... 8,000
0
(130)
... 13,000
0
(27,000)
... 2,700,000
q
min
q
max
0
(1.6)
...
160
0
(4)
...
430
0
(7)
...
700
0
(17)
...
1,700
(square ducts and larger diameters
on request)
For air or nitrogen in kg/h (other gases on request)
The above values are guide values for applications involving air under atmospheric conditions
Explosion protection
Zone 2/22
–
Output
Output signal, analog
0/4...20 mA, load < 750
Ω
, electrically isolated, alarm signalling at
< 3.5 or > 22 mA
Performance characteristic
Measured error
Air, nitrogen
other gases
Under calibration conditions in the stated measuring range
≤
± 0.9 % of measured value ± 0.05 % of possible end value in this nominal size (s. meas. ranges)
≤
± 1.8 % of measured value ± 0.10 % of possible end value in this nominal size (s. meas. ranges)
For special calibration on request
Repeatability error
< 0.25 % of measured value
Influence of medium temperature
< 0.05 %/K of measured value (dependent on type of gas)
Influence of medium pressure
< 0.2 %/100 kPa (/bar) of measured value (dependent on type of gas)
Response time
T
63
= 0.5 s (metal sensor 2 s)
T
63
= 2 s