Technical Instructions
1000
Ω
Nickel RTD Sensors
Document Number 155-330P25
September 5, 2008
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.
© 2008 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
+ 1 847-215-1000
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Document No. 155-330P25
Printed in the USA
Page 2
Principle of
Operation
The sensor's nickel sensing element measures the air or medium temperature.
The resistance of the sensing element changes as a function of the ambient
temperature.
Mechanical Design
The QAP22 Cable Temperature Sensor sensing element is incorporated in the
1000 Ohm Nickel RTD sensors. It is a nickel resistor housed in a metal sleeve so that it
is mechanically and electrically protected. The connecting cable inside the metal sleeve
is provided with a strain relief.
•
The QAA24U and QAA25U room sensors have a temperature sensor mounted
on a circuit board.
•
The plastic housing has a detachable wall plate.
Specifications
QAM2020.045,
QAM2020.020,
QAM2020.010,
QAE2020.005,
QAC2020U and QAP22
Range of use
–13°F to 203°F (
−
25°C to 95°C)
Sensing element
Siemens Ni1000 at 32°F (0°C)
Permissible ambient temperature
Cable
–13°F to 203°F (
−
25°C to 95°C)
Intermittent (two hours/day)
–13°F to 230°F (
−
25°C to 110°C)
Permissible ambient humidity
95% rh 30 days
Connecting cable (QAP22)
PVC, 20 AWG
Length
6 feet (1.8 m)
QAA24U and QAA25U
Range of use
32°F to 122°F (0°C to 50°C)
Sensing element
Siemens Ni1000 at 32°F (0°C)
Permissible ambient temperature
32°F to 122°F (0°C to 50°C)
Permissible ambient humidity
<85% rh
Wiring screw terminals for wires of
2 × 16 AWG or 1 × 12 AWG
Minimum 20 AWG
Installation
Complete installation instructions are provided with the sensors.
Accessories
AQM2000 Flange gasket kit (if adjustable depth is required for QAM2020.045 duct
point temperature sensors)
ARG70
Wall plate kit (required for wall box mounting)
Wiring
Legend:
B1 Temperature sensor
signal
B2 Setpoint signal
M Measuring, neutral
Figure 1. QAP22,
QAM2020.045, QAM2020.020,
QAM2020.010 and
QAE2020.005.
Figure 2. QAA24U.
Figure 3. QAA25U.
