Beck. The differential pressure transmitter 990 Display for air

Product catalog summary

General Description: The 990 Display series differential pressure transmitters are designed for measuring differential pressure, overpressure, and vacuum. They feature an adjustable pressure range and dual output signals.

Applications: These transmitters are suitable for monitoring gaseous, non-combustible, and non-aggressive media. Common applications include building automation, air conditioning systems, clean rooms, laboratories, VAV applications, and dynamic filter and ventilator monitoring.

Key Features:

Adjustable Pressure Range: The pressure range can be adjusted from 100% to 50% of its full scale value via the menu.
Switchable Pressure Units: Display units can be switched between Pascal (kPa), mbar, and inWC.
Switchable Output Signal: Options for 0…10V or 4…20mA output signals, configurable via the menu.
Adjustable Response Time: Configurable from 0.1 to 20 seconds.
Offset Calibration: Manual zero calibration for 990M and automated zero offset compensation for 990A.
Volume Flow Measurement: Output signal shape can be changed from linear to square rooted for volume flow measurement.
Switching Output: Two adjustable potential-free switching outputs with specific voltage and current capabilities.

Technical Specifications:

Measuring Method: Piezoresistive pressure transducer.
Mounting Position: Can be mounted in any position with zero offset calibration to eliminate position error.
Supply Voltage: 18 ... 30 VAC / VDC.
Output Signal: 0 ... 10 V or 4 ... 20 mA.
Maximum Current Draw: 990M: < 190 mA, 990A: < 250 mA.
Medium: Air and non-combustible, non-aggressive gases.
Working Temperature: 0 … 50°C.
Storage Temperature: -10 ... 70°C.
Linearity: ≤ ±0.5% FS, min. ±1 Pa.
Uncertainty: ±1% FS, min. ±1 Pa.
Humidity: 0 ... 95% relative, non-condensing.
Response Time: 0.1 – 20.0 s.
Process Connection: 4 mm and 6 mm hose connection.
Electrical Connection: Screw terminals for wires and strands up to 1.5 mm².
Display: Red 7 segment LED display, 4 digits.
Housing Dimensions: 143 x 96 x 48 mm.
Weight: Approx. 230 g.
Protection Class: IP20.
CE Conformance: EMC Directive, RoHS Directive, Low Voltage Directive.

Pressure Ranges: Various models offer pressure ranges from 0 … 25 Pa to 0 … 250 kPa, with specific overload and bursting pressures.

Order Matrix: Options for offset calibration, pressure range, pressure unit, output signal, display, and electrical connection are available.

Accessories: Includes Climaset® kits, duct connecting pipes, rubber grommets, rolls of PVC and silicone hoses, wall power supply, and fastening clip sets.

Catalog excerpts

Beck. The differential pressure transmitter 990 Display for air

Open the catalog to page 1

Technical data Supply voltage Output signal Maximum current draw 990M 990A Load for output 4 ... 20 mA 0 ... 10 V Medium Working temperature Storage temperature 18 ... 30 VAC / VDC 0 ... 10 V or 4 ... 20 mA < 190 mA < 250 mA 20 ... 500 n > 1 kn (< 10 mA) Air and non-combustible and non-aggressive gases 0 ... 50°C -10 ... 70°C Differential pressure transmitter 990 Display General description The transmitters of the 990 Display series are used to measure differential pressure, overpressure and vacuum. They offer one adjustable pressure range and two output signals. Applications Monitoring of gaseous,...

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Beck. The differential pressure transmitter 990 Display for air-3

Pressure range Overload capacity Bursting Additional uncertainty pressure with temperature 0.5 mbar 1.0 mbar 2.5 mbar 5.0 mbar 10 mbar 25 mbar 50 mbar 100 mbar 250 mbar 500 mbar 1,000 mbar 2,500 mbar Further pressure ranges on request. Offset calibration Pressure range Pressure unit Output signal Display ( 0.5 mbar) ( 1.0 mbar) ( 2.5 mbar) ( 5.0 mbar) ( 10 mbar) ( 25 mbar) ( 50 mbar) ( 100 mbar) ( 250 mbar) ( 500 mbar) (1,000 mbar) (2,500 mbar) only available as 990A only available as 990A 10 V or 4 ... 20 mA, with 2 switching outputs 20 mA or 0 ... 10 V, with 2 switching outputs Electrical connection...

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