User Manual

ManualsBrandsSiemens ManualsSensors HumidityCE Declaration QFM66/C

CM1N1863E

05.05.2003

Siemens Building Technologies

HVAC Products

863

Duct Sensor

QFM66/C

for relative humidity and temperature

with calibration certificate

• Operating voltage AC 24 V

• Output signal DC 0...10 V

• Very high measuring accuracy throughout the entire measuring range

• Capacitive humidity measurement

• Recalibration service

Use

The QFM66/C sensor is used in ventilation and air-conditioning plants requiring:

• very high accuracy and reliability for measuring relative humidity and temperature

• regular recalibration and readjustment of the sensors

Examples:

• Storage and production facilities in the paper, textiles, pharmaceutical, chemical,

electronics industries, etc.

• Laboratories

• Hospitals

• Computer centres

• Greenhouses

1863P01

Summary of content (6 pages)

PAGE 1
1863P01 863 Duct Sensor QFM66/C for relative humidity and temperature with calibration certificate • • • • • Operating voltage AC 24 V Output signal DC 0...
PAGE 2
Ordering and delivery Indicate device name and type designation on order: Duct Sensor QFM66/C. The coupling of the circular connector (Lumberg RKC 50/11) and the installation flange are delivered uninstalled. Equipment combinations All systems and devices that are capable of acquiring and handling the sensor’s DC 0...10 V output signals.
PAGE 3
Fitting notes Location Install the sensor at approximately the middle of the duct wall (ideal air mixture). If the sensor is to be installed downstream of a steam humidifier, maintain a distance of at least 3 m from it. A bypass is recommended if space is limited. For dew-point control, install the sensor in the extract air duct. The sensor can be installed with or without the installation flange. If the installation flange is used, the flange is installed on the duct wall.
PAGE 4
Technical data Humidity sensor Range of use Measuring accuracy at 20 °C In the range 0...90 % r.h. In the range 90...100 % r.h. Temperature dependency In the range −10...+50 °C Reduction of the humidity measuring range At temp. above 60 °C at sensor head Time constant t90 see illustration in margin approx. 20 s Range of use Measuring accuracy at 20 °C Sensing element Time constant t63 −35...+5 0 °C ±0.5 K Pt1000 Class A approx.
PAGE 5
Norms and standards Weight Product safety Automatic electrical controls for household and similar use Electromagnetic compatibility Immunity Emissions conformity to EMC directive Low voltage directive Excl. packaging EN 60 730-1 EN 61 000-6-2 EN 50 081-1 89/336/EEC 73/23/EEC approx. 0.136 kg 5/6 Siemens Building Technologies HVAC Products Duct sensor QFM66/C CM1N1863E 05.05.
PAGE 6
Connection terminals G M B1 B2 B3 (r.H.) (at 50) (at 35) B1 B2 B3 B3 B1 B2 G Front view: Built-in plug 1863G01 M 1853G01 M G System potential AC 24 V (SELV) Sytem neutral, measuring neutral Output for DC 0...10 V measuring signal (for 0...100 % r. h.) Output for DC 0...10 V measuring signal (for 0...50 °C) Output for DC 0...10 V measuring signal (for −35...+35 °C) Dimensions (in mm) 292 86 56 43 ø 12 ø 22 19,5 32 6 max. 228 1863M01 138 249 ø 27 42 50 3,2 min.