441-622-015
Type 500X
Page 2
DANGER, WARNING, CAUTION and NOTE statements
Refers to conditions or hazards which could result in serious personal injury or death.
Refers to conditions or hazards which could result in personal injury.
Refers to conditions or hazards which could result in equipment or property damage.
Alerts you to facts or special instructions.
ALL DANGER, WARNING, AND CAUTION NOTICES MUST BE COMPLIED WITH IN FULL
SPECIFICATIONS
Min./Max. Supply Pressure
Minimum - 3 psig (21 kPa)
Above maximum output
Maximum - 100 psig (700 kPA)
Supply Pressure Sensitivity
<± 0.1% of span per psig
(<± 0.15% of span per 10 kPa)
Linearity
<± 0.75% of span
Repeatability
< 0.5% of span
Hysteresis
< 1.0% of span
Flow Rate
4.5 scfm (7.6 m3/hr ANR) at
25 psig (175 kPa) supply
12.0 scfm (20.0 m3/hr ANR) at
100 psig (700 kPa) supply
Maximum Air Consumption
.05 scfm (.07 m3/hr) midrange typical
Port Sizes
1/4 NPT (Pneumatic)
1/2 NPT (Electric)
1. DESCRIPTION and INSTALLATION
1.1 Description
1.1.1 The ControlAir Type 500X converts a current or voltage input signal to a linearly proportional pneumatic output
pressure. This versatile instrument is designed for control applications that require a high degree of reliability and
repeatability at an economical cost.
1.2 Principle of Operation
1.2.1 The Type 500X is a force balance device in which a coil is suspended in the field of a magnet by a flexure. Current
flowing through the coil generates axial movement of the coil and flexure. The flexure moves towards the nozzle
and creates back pressure which acts as a pilot pressure to an integral booster relay. Input signal increases (or
decreases for reverse acting) cause proportional output pressure increases.
Zero and Span are calibrated by turning adjust screws on the front face of the unit. Adjustment of the zero screw
repositions the nozzle relative to the flexure. The span adjustment is a potentiometer that controls the amount of
current through the coil.
1.3 Mounting
1.3.1 Unit may be pipe, panel, or bracket mounted. Mounting may be at any angle, though may require field
adjustment. High external vibration may cause output fluctuations. Mounting in a vibration-free area is
recommended.
NOTE
CAUTION
WARNING
DANGER