Self-Calibration - Emerson Bettis SMART EHO G Series Service Instructions Manual

Section 4: Set-up/Start-up Procedure
September 2020
Figure 17
4.6.5
4.6.6
NOTE:
If the EHO Actuator is supplied with optional ESD, before operating a motor-powered
stroke, a customer supplied ESD signal must be present and Solenoid Valve (P) energized.
4.6.7
4.6.8
4.7

Self-Calibration

NOTE:
Self-calibration must be performed once the SMART EHO is mounted to the valve or if the
stop bolts have been adjusted on the actuator.
Self-Calibration establishes the position range of the SMART EHO. The EHO has the ability
to automatically find its precise full open and full close set points after adjustments to the
mechanical stops is completed. Self-Calibration must be performed after the SMART EHO
is securely installed on the valve and before the SMART EHO
performs normal operations.
30
Inspection Port for Motor Rotation
While observing the inspection port, for motor rotation, push and release the
OPEN/CLOSE Selector Switch to Power Stroke the actuator and release the
OPEN/CLOSE Selector Switch. Motor rotation should be counterclockwise when
looking at the back of the motor.
If needed, correct motor rotation.
Toggle the OPEN/CLOSE Selector Switch to Power Stroke the actuator. The
Electric Motor (Z) will start to run driving Hydraulic Pump (Y). The Hydraulic
Pump (Y) draws fluid from Reservoir (I) and pushes it into the Bettis G-series
hydraulic cylinder (W).
Shut off the electrical power going to the unit, if an (optional) Circuit Breaker
Module is supplied, turn the Circuit Breaker to OFF.
Service Instructions
MAN-02-08-77-0714-EN Rev. 2
Set-up/Start-up Procedure