Pressure Switch 836T
– Allen Bradley
Technical Data
Technical Terms
Adjustable operating range —
Total span
within which the contacts can be adjusted to
trip and reset.
Trip setting —
Higher pressure setting at
which value the contacts transfer from their
normal state to a change state.
Reset setting —
Lower pressure setting at
which value the contacts return to their
normal state.
Adjustable differential —
Difference between the trip and reset values
Minimum differential —
When the differential is set to the lowest possible difference between trip and
reset.
Maximum differential —
When the differential is set to the highest possible difference between trip
and reset.
Max. occasional surge pressure —
Maximum surge pressure that can be applied to the actuator. Surges
or transients can occur during start-up and shut-down of a machine or system. Expressed in
milliseconds, complex electronic instrumentation is required to measure the varying amplitude,
frequency, and duration of this wave form. Extreme surges that occur approximately 8 times in a 24-
hour period are negligible.
Maximum line pressure —
Maximum sustained pressure that can be applied to the actuator without
permanent damage. The control should not be cycled at this pressure.
Note:
Does not apply to piston
type controls.
psi —
Pounds per square inch gauge (positive pressure). Devices listed are in gauge pressure units which
use atmospheric pressure as a reference. Atmospheric pressure at sea level is approximately 14.7 psi or
30 in. Hg.
