MTS Series 793 - Manual (Page 213)

Note:
If it is not possible to switch to a different control mode or you cannot disable station power, use offset
instead of electrical zero.
You can apply an auto zero or a manual zero to shift a conditioner’s electrical zero.
1. In the Station Manager window toolbar, select an access level of Calibration.
2. Apply station power.
3. Use the Manual Command window to position the actuator at the desired electrical zero position:
a)
On the Station Controls panel toolbar, click to display the Manual Command window.
b) In this window, select the desired Channel and a Control Mode of displacement.
c) Select the Enable Manual Command check box.
d) Use the Manual Cmd slider to move the actuator to the new zero position.
4. With the actuator in the new zero position, either switch to a different control mode or shut off station
power.
Leave the Enable Manual Command check box enabled and make sure that the actuator does not move.
5. Select the displacement signal that needs the electrical offset:
a) On the Station Manager window Display menu, select Station Setup.
b) On the Station Setup window navigation pane, locate and select the Channels or Auxiliary Inputs
resource whose sensor signal needs the offset.
6. On the Inputs panel, click the Offset/Zero tab.
7. On the Offset/Zero tab, apply the electrical offset:
a) Clear the Electrical Zero Lock if it is selected.
b) Click Auto Zero to apply the electrical offset.
Manual Zero shows the offset applied to produce the Current Value.
c) Select Electrical Zero Lock to make these controls unavailable at access levels of Tuning and Operator.
MTS Series 793 Control Software 213
Station Setup