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Siemens QVM62.1 Technical Instructions

Air velocity sensor
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QVM62.1

Air Velocity Sensor

Description
Application
Product Number
Operation
This sensor is used to control the air velocity to a constant value, balance out pressure
fluctuations (supply or exhaust air control), or to monitor the flow in air ducts. It is
primarily used for modulating fan control in primary applications to set the basic volume
flow.
The QVM62.1 Sensor records the air velocity as a measured value and converts it to
an active 0 to 10 Vdc output signal. There are three measuring ranges available:
• 0 to 16 ft/s (0 to 5 m/s)
• 0 to 33 ft/s (0 to 10 m/s)
• 0 to 49 ft/s (0 to 15 m/s).
The sensor measures a point (that is it measures the values at a specific location in the
flow profile. For recording the mean air velocity in the duct, the sensor's immersion
depth is the key measure. The immersion depth depends on the flow profile.
The measurement principle is based on the anemometric measurement principle. The
specially developed thin film sensing element of the QVM62.1 is almost totally
independent from the flow direction and is insensitive to almost any kind of dirt in the
airflow.
QVM62.1
The air velocity sensor consists of:
• Immersion stem with sensor head and sensing element
• Extension pipe with fitting
• Immersion stem end with flow direction arrow
• Adjustable connecting flange
• Transducer
• Connection cable, screened, four-core, 3 feet (1 m) long
Technical Instructions
Document No. 155-006
October 26, 2006
Siemens Industry, Inc.

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  Summary of Contents for Siemens QVM62.1

  • Page 1: Air Velocity Sensor

    Application The QVM62.1 Sensor records the air velocity as a measured value and converts it to an active 0 to 10 Vdc output signal. There are three measuring ranges available: • 0 to 16 ft/s (0 to 5 m/s) •...
  • Page 2 Technical Instructions QVM62.1 Air Velocity Sensor Document Number 155-006 October 26, 2006 Operation A scale with 0.20 in (0.5 cm) grating on the immersion stem and the extension pipe (Continued) indicates the immersion depth. The connecting flange is used to attach and seal the immersion stem on the duct wall.
  • Page 3 QVM62.1 Air Velocity Sensor Technical Instructions Document Number 155-006 October 26, 2006 Connections Mechanical Screw connection Electric Screw terminal, maximum 2 × 18 AWG Degree of protection Degree of protection provided by enclosures as per EN 60 529 Transducer IP 42...
  • Page 4: Wiring Diagram

    Figure 4. Dimensions in Inches (Millimeters). Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. © 2006 Siemens Industry, Inc. Siemens Industry, Inc.