Data Sheet for Product

ManualsBrandsSiemens ManualsPressostats (pressure)Differential pressure sensor QBM4000..., QBM4100...

CE1N1919en01

201

9-10-09

Smart Infrastructure

919

QBM4000-..., QBM4100-1U QBM4100-1D

Differential pressure

sensor

QBM4000...

QBM4100...

For air and non-aggressive gases, with calibration certificate.

• Calibration certificate from the factory

• High degree of measuring accuracy

• Pressure-linear characteristic curve

• Operating voltage AC 24 V / DC 13.5…33 V or DC 11…33 V

• Output signal DC 0...10 V or 4…20 mA

• Simple and fast mounting thanks to integrated fixing angle bar in the

housing

• Calibrated and temperature-compensated measuring signal

• Excellent long-term response

• Supplied with connection set

• Very short reaction time

• Display* indicates the present differential pressure

Depending on type

Use

The differential pressure sensor acquires differential, over and under pressure of

air and nonaggressive gases if a high degree of measuring accuracy and quality is

required as well as a requirement for a calibration certificate.

Fields of application:

• Measuring slightest differential pressures in ventilation and air conditioning ducts

• Check air flows

• Monitor filters and control fans

• Pressure supervision in labs, production, storage and clean rooms

• For acquiring variable air flow in VAV plants on the supply and extract air side

Summary of content (6 pages)

PAGE 1
s 1 QBM4000-..., QBM4100-1U Differential pressure sensor 919 QBM4100-1D QBM4000... QBM4100... For air and non-aggressive gases, with calibration certificate. • • • • • • Calibration certificate from the factory High degree of measuring accuracy Pressure-linear characteristic curve Operating voltage AC 24 V / DC 13.5…33 V or DC 11…33 V Output signal DC 0...
PAGE 2
Type summary Type (ASN) Product number (SSN) Measuring range QBM4000-1 QBM4000-3 QBM4000-10 QBM4000-25 QBM4100-1U S55720-S247 S55720-S248 S55720-S249 S55720-S250 S55720-S251 0...100 Pa 0...300 Pa 0...1000 Pa 0...2500 Pa -50...+ 50 Pa DC 0...10 V DC 0...10 V DC 0...10 V DC 0...10 V 4...20 mA No No No No No QBM4100-1D 1 S55720-S252 0...100 Pa 4...20 mA Yes 1 Output signal LCD Type with digital display.
PAGE 3
Design The differential pressure sensors consist of: • Sensor housing with fixing angle bar, 3-pin plug and hinged lid with sealed safety screw • Pressure chamber with membrane and ceramic lever • Circuit board • LCD display for the digital display of the sensor signal in Pa (for QBM41…D only) 1919Z 01 Display, setting, and connection elements 1 Key 2 3 4 1 3-pin plug 2 Display window (on QBM4100-1D only) for the digital display of the sensor signal 3 Connection nipples (see "Mounting notes") 4 Seale
PAGE 4
Commissioning notes Caution Sensor calibration The values indicated under "Technical data" apply only to vertically mounted differential pressure sensors (connection nipples pointing down). The sensor is calibrated at the factor in the vertical position. As a consequence, the sensor must be installed in the vertical position. For horizontal installation (housing cover top or bottom), deviations occur to measured values that negate the measured values on the certificate.
PAGE 5
QBM4000-1 Zero point <±1.0 % FS QBM4100-1D Sum from linearity, reproducible and hysteresis. <±1 % FS TC zero point <±0.1 % FS/°C TC sensitivity <±0.06 % FS/°C Zero point <±0.7 % FS Sum from linearity, reproducible and hysteresis. <±1 % FS QBM4000-3 QBM4000-10 QBM4000-25 TC zero point <±0.05 % FS/°C TC sensitivity <±0.05 % FS/°C Zero point <±0.7 % FS Sum from linearity, reproducible and hysteresis. <±1 % FS TC zero point <±0.04 % FS/°C TC sensitivity <±0.
PAGE 6
Connectors QBM4000-.. Front view of the plug on the sensor housing (internally wired at the factory) or the view of the connection side of the cable plug. Terminal assignment Operating voltage AC 24 V (SELV) or DC 13.5…33 V. Output signal DC 0...10 V (reference point M) GND QBM4100-1. Front view of the plug on the sensor housing (internally wired at the factory) or the view of the connection side of the cable plug. Terminal assignment Supply voltage DC 8…33 V. Output signal DC 4…20 mA.