CMC Airmaster R1, Hardware Installation Manual

Page: 18 / 41

C.M.C. n.v. - Airmaster R1 installation guide – base unit – V1.1 – MANY0317A.00
Page 18 of 41
6.3.7 ACM type 7: PT1000 temperature sensor (-50…+250 deg C)
PT1000 temperature sensors have a resistance varying with the temperature. When the
temperature is 0°C (32°F) the nominal resistance is 1000 ohm. At 200.4°C this resistance is
raised to 1760 ohm.
Use PT1000 sensors with a mean temperature coefficient
α
of
0.003850
ΩΩ
−1
°
C
−1
.
In case of
doubt please contact your sensor supplier. (reference: IEC Publication 751)
The wires to a sensor must be as short as possible and with a big enough section, to reduce
wire resistance errors.
The wires of a PT1000 sensor of the same colour have to be kept together if the sensor has
more than 2 wires.
Connect the shielding of the sensor cable to the R1 unit faston terminal.