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Rosemount 644 Temperature Transmitter
  644H and 644R intelligent temperature transmitters are extensions of Rosemount temperature instrument series,which could receive 2,3,4 line thermal resistence,thermocouple,resistence and mV input.Every transmitter will be characterized with special envi
Description

1、Product description:

  644H and 644R intelligent temperature transmitters are extensions of Rosemount temperature instrument series,which could receive 2,3,4 line thermal resistence,thermocouple,resistence and mV input.Every transmitter will be characterized with special enviroment temperature of the factory,in order to reduce the measurement deviation in the whole working temperature range.

  644H could compose integration temperature module by installing on the connnection housing of the sensor,or installing inside one terminal box away from the sensor; Or install the 644H on guideway by using optional installation component.The 644R could be directly installed on the wall or DIN guideway.

2、Main technique data

  simulation precision :±0.03% range

  digital precision:±0.15℃(±0.27F),Pt100 The thermal resistance

  Ambient temperature influence:0.003℃/1.0℃,Pt100

  stability:±0.1% for 1 year

  input:Mv,ohm

  output:4-20ma,used HART

  Service voltage:12.0 to 42.4V

  the outstanding performance and reliability:

  Transmitter - sensor matching function, can improve the measurement precision of the whole system

  Temperature correction circuit, reduce the temperature of the environment

  Independent alarm circuit, electronic board and sensor fault can be detected

  Performance indicators at least 3σ

  accuracy:±0.15℃(±0.27oF), Pt100
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