
Model 755R
Instruction Manual
Refer to Figure
2.Current Output Receptacle J1. This connector accepts the optional
3.Dual Alarm Amplifier Circuit. This cir- cuit drives the optional 654019 Alarm Relay Assembly.
a.First Stage Amplifier
Permits selection of the desired fullscale oxygen range for the recorder via
b.Second Stage Amplifier
Provides (a) a
1.Recorder Output Resistor Network. It provides a
Oxygen is strongly paramagnetic while most other common gases are weakly diamagnetic. The paramagnetism of oxygen may be regarded as the capability of an oxygen molecule to become a temporary magnet when placed in a magnetic field. This is analogous to the magnetization of a piece of soft iron. Diamagnetic gases are analogous to
With the Model 755R, the volume magnetic susceptibility of the flowing gas sample is sensed in the detector/magnet assembly. As shown in the functional diagram of Figure
Because of the “magnetic buoyancy” ef- fect, the spheres of the test body are subjected to displacement forces, resulting in a displacement torque that is proportional to the volume magnetic susceptibility of the gas surrounding the test body.
Rosemount Analytical Inc. A Division of Emerson Process Management | Circuit Analysis |