How To Adjust the Trip Point Direction
Chapter Four: Operation
40
How To Adjust the Trip Point Direction
The trip point direction defines the direction of pressure change that will energize the trip point.
The trip point direction for the Type 623H
transducer is initially set “low”; the trip points are
energized as the pressure falls
below
the specified trip point level. The trip point direction can be
changed to “high”; so
that the trip points energize as the pressure rises
above
their respective trip
points.
To change the trip point direction:
1. Turn off power to the transducer and disconnect the cables from TB1 and TB2.
2. Push down on the colored ring on the endcap, turn it about ¼ turn counterclockwise, and
lift it off the endcap.
3. Remove the two screws on each side of TB1.
4. Lift off the graphics panel.
The Relay Board with jumpers J12, J13, J15, and J16 is now accessible. The Relay
Board will be one of the two types shown in Figure 11, page 41, and Figure 12, page 42.
You can easily identify whether your unit contains the Relay Board or alternate Relay
Board by the location of the jumpers as shown in the figures.
