User Guide

Note:

Occasionally, an adjustment to the input span setting results in a change to the start

point setting, due to a small interaction between these two settings. After adjusting the

input span potentiometer, ensure that both settings meet requirements by repeating steps

10 through 13, as necessary.

14. Turn off the current input signal to the drive and turn off power to the actuator. Then,

reconnect the drive’s leads to the controller.

15. Reinstall the cover onto the drive and secure it with the screw removed in step 3.

16. Reapply power to the actuator, then turn on the controller signal to the drive’s current

input.

CHECKOUT

After the entire system has been installed and the actuator has been powered up, the

following checks can be made to verify proper system operation.

Positioning with

Controller

If the sensed media is within the controller’s throttling range, the actuator can be positioned

by adjusting the controller setpoint up and down. Check for correct operation of the actuator

(valve or damper) while it is being stroked. Use a DVM or mA meter to verify the actual signal

that is applied.

Manual Positioning A manual positioning test of the drive may be conducted by performing the start point and

input span adjustment procedure. Where the procedure calls for adjustments to be made to

the potentiometers, simply verify that the actuator shaft is

just

reaching the start point or is

just

reaching its limit, as applicable.

MAINTENANCE

The drive requires no maintenance.

Regular maintenance of the total system is recommended to assure sustained, optimum

performance.

FIELD REPAIR

None. Replace an inoperative drive with a functional unit.