MFC/MFM - 21
english
Type 8712 / 8702 MASS FLOW CMOSens
®
Full scale range (Q
nom
) 0.02 to 50 l
N
/min (N
2
equivalent)
Operating media
neutral, non-contaminated gases,
others on request
max. operating pressure 10 bar, depending on nom. valve diameter
Calibration medium operating gas or air
Medium temperature -10 to + 70 °C
Ambient temperature -10 to + 50 °C
Measurement accuracy
(after 1 min. warm-up)
± 0.8 % of Rdg. ± 0.3 % of F.S.
Linearity ± 0.1 % of full scale
Reproducibility ± 0.1 % of full scale
Control range / Span 1 : 50; higher span on request
Setting time (T
95%
) < 300 ms
Operating voltage 24 V DC ± 10 %; residual ripple < 5 %
Connection cross-section min. 0.25 mm² (better 0.5 mm²)
Power consumption max. 6.5 W (Type 8712)
max. 9 W (Type 8712 bus)
2.5 W (Type 8702)
5 W (Type 8702 bus)
Electrical isolation yes
Setpoint setting
(to be chosen)
0 ... 10 V
0 ... 5 V
0 ... 20 mA
4 ... 20 mA
Resolution 2.5 mV or 5 µA
Input impedance
(voltage input)
> 20 kOhm
Input impedance
(current input)
< 300 Ohm
3 binary inputs low-activated, connect to GND to activate
Process value output
(to be chosen)
0 ... 10 V
0 ... 5 V
0 ... 20 mA
4 ... 20 mA
Resolution 10 mV ou 20 µA
max. current (voltage outp.) 10 mA
max. burden (curr. outp.) 600 Ohm
2 relay outputs potential-free changeover 60 V, 1 A, 60 VA
Connections 8-pole socket
15-pole SUB-HD socket
9-pole SUB-D socket (bus version only)
Type of protection IP 65 (with the specified plug connectors)
Housing material
Cover material
stainless steel 1.4305
PBT
Installation position horizontal or vertical
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