fdum200db Sensortechnics GmbH, fdum200db Datasheet - Page 4

• Manufacturer Part Number: fdum200db
• Description: Mass Flow Sensors Gases
• Manufacturer: Sensortechnics GmbH

HEATER CONTROL CIRCUIT
HEATER CONTROL CIRCUIT
(suggested)
E / 11720 / A
Note:
Circuits required for operation per specifications. Circuits are not on board the sensor.
A) Customer supplied 1 kOhm resistor (affects temperature compensation and span voltage).
B) Customer supplied 24.9 kOhm matched bridge resistors (affects null output voltage).
Output is measured differentially from pins 8 to 2.
1 kOhm
A)
7
3
R
R
b
r
6
4
R
R
a
5
h
SENSING BRIDGE SUPPLY CIRCUIT
DIFFERENTIAL INSTRUMENTATION
AMPLIFIER CIRCUIT (optional)
V
where
O
24.9 kOhm
Mass flow sensors for gases
2
R
V
2
R
Offset
1
2
R
1
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V
10 V
R
R
B)
S
4
3
1
R
(
V
6
R
2
6
8
R
24.9 kOhm
V
FDU Series
5
1
)
V
Offset
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