User Manual

ManualsBrandsSiemens ManualsSensors PressureDifferential Pressure Sensors QBM..5..C

919

QBM65.../C, QBM75-1U/C QBM75.1-1/C

Differential

Pressure Sensors

QBM65.../C

QBM75.../C

for air and non-corrosive gases, with calibration certificate

1919P01

1919P03

• Highly accurate measurements with calibration certificate

• Simple and quick to install

• Recalibration service

Use

The calibrated differential pressure sensors are used in circumstances where highly

accurate measurements are required, or where there is a (statutory) requirement for

regular calibration.

Typical applications include the measurement of positive or negative pressure and

pressure differentials in HVAC plants, including the control of duct pressure differentials

for fan control, room pressure equalization in VAV systems, and filter and fan-belt moni-

toring. Other possible uses include the monitoring of specified pressure differentials in

production areas and laboratories in the chemical industry, and in hospitals, clean-

rooms, warehouses, restaurants, kitchens, etc.

Type summary

Type reference Measuring range Output signal LCD display

QBM75-1U/C

– 50 ... + 50 Pa DC 4 ... 20 mA No

QBM75.1-1/C

0 ... 100 Pa DC 4 ... 20 mA Yes

QBM65-1/C

0 ... 100 Pa DC 0 ... 10 V No

QBM65-3/C

0 ... 300 Pa DC 0 ... 10 V No

QBM65-10/C

0 ...1,000 Pa DC 0 ... 10 V No

QBM65-25/C

0 ...2,500 Pa DC 0 ... 10 V No

(Conversion: 100 Pa = 1 hPa = 1 mbar)

CA1N1919E

27.08.2010

Building Technologies

Summary of content (6 pages)

PAGE 1
919P03 1919P01 1 919 QBM65.../C, QBM75-1U/C QBM75.1-1/C QBM65.../C QBM75.../C Differential Pressure Sensors for air and non-corrosive gases, with calibration certificate • Highly accurate measurements with calibration certificate • Simple and quick to install • Recalibration service Use The calibrated differential pressure sensors are used in circumstances where highly accurate measurements are required, or where there is a (statutory) requirement for regular calibration.
PAGE 2
Ordering and delivery When ordering, please give name and type reference, e.g. Differential pressure sensor QBM65-3/C The differential pressure sensors are supplied with a round connector (type: Lumberg RKC 30/11) and a 2m plastic tubing. . Additional accessories are to be ordered separately. Accessories Two sets of air duct probes are available for precise measurements, see datasheet CA1N1589E for details. Mounting brackets are available additionally.
PAGE 3
Horizontal mounting (with the hinged cover at the top or bottom) is NOT RECOMMENDED. If horizontal mounting cannot be avoided, account must be taken of deviations in the measured value (see "Factory calibration" below). This mounting position is not allowed for QBM75-1U/C. 70006 Caution If the pressure connection nozzles face upwards, or are at a lower level than the duct probes, condensation can collect inside the unit, causing damage to the sensor. + – When mounting on 35 x 7.
PAGE 4
Technical data Electrical interface QBM65.../C Power supply Safety extra low voltage (SELV, PELV) Supply voltage AC 24 V ± 15 %, 50 / 60 Hz or DC 13.5...33 V Power consumption < 0.5 VA Current draw < 10 mA Output signal DC 0...10 V, RLoad > 10 kΩ (not galvanically separated, 3-wire connection, short-circuitproof, reversed polarity protection) QBM75.../C Supply voltage DC 11...33 V Power consumption < 0.7 VA Current draw Output signal 4...20 mA 4...20 mA, Operation voltage − 11 V Ω 0.
PAGE 5
Connections Electrical connection 3-core round connector with 1.5 mm2 screw terminals (type Lumberg RKC 30/11) Pressure connections Plastic nozzles, 6.2 mm dia., Lower pressure Mounting Screwed directly to duct or mounted side identified as 'P2' or ' – ' Mounting on walls, ceilings or in control panels Orientation Vertical, with pressure connection nozzles downwards (factory calibration), mandatory for QBM75-1U/C Environmental conditions Perm. ambient temperature Operation 0...
PAGE 6
Dimensions 49 105 QBM65.../C QBM75.../C 5,5 P2 22 16,3 P2 9,6 80 1919M01 27,6 86 P1 ø 6,2 140 46 4 92 51 28 35,2 6 11,6 AQB21.2 18 P2 11 ø 27 75 58 37 92 80 1910M03 97 EN 60 715-TH 35-7.5 AQB2000 69,5 61 20 10 15 5,5 40 1916M02 34 5,5 20 10 21 1,5 60 Dimensions in mm 6/6  2005 – 2010 Siemens Switzerland Ltd. Siemens Building Technologies Differential pressure sensors QBM65…/C, QBM75…/C Subject to changes CA1N1919E 27.08.