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QPM Series

Technical Instructions

Document No. CE1N1962

July 26, 2019

Indoor Air Quality Duct

Sensors

Siemens Industry, Inc.

Description

The QPM Series Indoor Air Quality Duct Sensors are designed for applications where

precise, stable carbon dioxide or air quality sensing is required.

Several models are available with either CO

only, or with Volatile Organic Compounds

(VOC) (also known as mixed gas), relative humidity and/or temperature sensing. All

units deliver a voltage or current signal for all outputs and have a CO

measuring range

of 0 to 2000 ppm.

Features

• Maintenance-free, Non-Dispersive Infrared (NDIR) CO

sensing element is ideal for

use in spaces that are occupied 24/7.

• Combination units enable a single sensor to take the place of up to three individual

sensors.

• No recalibration required.

• 24 Vac or 15 to 35 Vdc operating voltage

• 0 to 10 Vdc, 0 to 5 Vdc, or 4 to 20 mA signal outputs (field selectable)

Application

For use in air ducts of ventilation and air conditioning applications to enhance room

comfort and to optimize energy consumption by providing demand-controlled

ventilation. The sensor acquires:

• CO

concentrations as an indication of occupancy in rooms where smoking is

prohibited.

• VOC concentrations as an indication of odors in the duct air, such as tobacco

smoke, body odor, or material fumes.

• The relative humidity of the duct air.

• The duct air temperature.

QPM2102 models measure both CO2 and volatile organic compounds (VOC) for

optimized indoor air quality. A single 0 to 10V, 0 to 5V, or 4 to 20 mA (selectable)

output signal is automatically adjusted to reflect the higher of the two values. This

enables the combination CO2 + VOC sensor to be easily substituted for a CO2 sensor

in any demand control ventilation control system.

The QPM21 Series Sensors can be used as:

• Control sensors in the supply or exhaust air duct.

• Transmitters for building automation and control systems and/or display units.

Summary of content (10 pages)

PAGE 1
Technical Instructions Document No. CE1N1962 July 26, 2019 QPM Series Indoor Air Quality Duct Sensors Description The QPM Series Indoor Air Quality Duct Sensors are designed for applications where precise, stable carbon dioxide or air quality sensing is required. Several models are available with either CO2 only, or with Volatile Organic Compounds (VOC) (also known as mixed gas), relative humidity and/or temperature sensing.
PAGE 2
Technical Instructions Document Number CE1N1962 July 26, 2019 Application, Continued QPM Series Indoor Air Quality Duct Sensors Typical use: • Acquisition of CO2 and VOC concentrations: In party rooms, lounges, fair pavilions and exhibition halls, restaurants, canteens, shopping malls, sports gymnasiums, sales rooms, and conference rooms.
PAGE 3
QPM Series Indoor Air Quality Duct Sensors CO2/VOC Concentration (QPM2102 and QPM2102D Only) Technical Instructions Document Number CE1N1962 July 26, 2019 The sensor acquires and evaluates the CO2 /VOC concentration and converts it to a ventilation demand signal. It represents the result of maximum selection of the CO 2 measuring signal and the filtered VOC measuring signal.
PAGE 4
Technical Instructions Document Number CE1N1962 July 26, 2019 Mechanical Design QPM Series Indoor Air Quality Duct Sensors The duct air quality sensor consists of housing, printed circuit board, connection terminals, mounting flange and immersion rod with measuring probe. The two-sectional housing is comprised of base and removable cover (without display: snap-on design, with display: screwed fastening).
PAGE 5
QPM Series Indoor Air Quality Duct Sensors Output Signal Selection Active Test Function Temperature Display Changeover Technical Instructions Document Number CE1N1962 July 26, 2019 • O1 = 4 to 20 mA • O2 = 0 to 10V • O3 = 0 to 5V Jumper for the measuring range in the horizontal position: The signal output delivers the values according to the Test function active table (see Figure 3). Meaning of the different jumper positions: − − Jumper in the right vertical position = °C (factory setting).
PAGE 6
Technical Instructions Document Number CE1N1962 July 26, 2019 Mounting Notes Mounting Location and Orientation QPM Series Indoor Air Quality Duct Sensors • To ensure degree of protection, mount the sensor with the cable entry pointing downward. • Mount the sensor in a location where it can be easily accessed for service. • If used in connection with steam humidifiers, the distance to the humidifier must be a minimum of 9.8 feet (3 m).
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QPM Series Indoor Air Quality Duct Sensors Functional data, rh with QPM2162/QPM2162D Functional data, temperature with QPM2160/QPM2160D, QPM2162/QPM2162D Technical Instructions Document Number CE1N1962 July 26, 2019 Range of use Measuring range Measuring accuracy @ 73°F (23°C) and 24 Vac 0 to 30/70 to 95% rh 30 to 70% rh Temperature dependency Time constant Output signal, linear (terminal X2) 0 to 95% rh (non-condensing) 0 to 100% rh Environmental temperature range for electronics Measuring range 23°
PAGE 8
Technical Instructions Document Number CE1N1962 July 26, 2019 QPM Series Indoor Air Quality Duct Sensors Wiring Connections Figure 4. QPM2100, QPM2100D. Figure 5. QPM2102, QPM2102D. Figure 6. QPM2160, QPM2160D. Figure 7. QPM2162, QPM2162D. G, G0 G0 X1 X2 X3 Page 8 System potential 24 Vac (SELV) System neutral and measuring neutral Signal output 0 to 10 Vdc or 0 to 5 Vdc Signal output 0 to 10 Vdc or 0 to 5 Vdc Signal output 0 to 10 Vdc or 0 to 5 Vdc Siemens Industry, Inc.
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QPM Series Indoor Air Quality Duct Sensors Technical Instructions Document Number CE1N1962 July 26, 2019 Dimensions In Inches (Millimeters) Figure 8. QPM Series Duct Air Quality Sensors Dimensions in Inches (Millimeters) Figure 9. QPM Series Duct Air Quality Sensors with Display. Siemens Industry, Inc.
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Technical Instructions Document Number CE1N1962 July 26, 2019 QPM Series Indoor Air Quality Duct Sensors Dimensions, Continued In Inches (Millimeters) Figure 10. Drilling Pattern. 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. Products or company names mentioned herein may be the trademarks of their respective owners © 2019 Siemens Industry, Inc. Siemens Industry, Inc.