4.2.8 Selecting a new setting from a list of choices
Use the procedure described below to select a new setting for parameters that present a list of choices
(e.g., PV Display, Pressure Units, etc.)
1. Press to begin the edit process. The basic display will show the current setting of the item on
the lower line, left justified.
2. Press the or buttons to scroll through the list of choices.
3. Press to make your selection. The new selection will be stored in the transmitter and displayed
on the lower line, right justified.
4.3 Three Button Operation with no display Installed
When there is no display installed, the buttons can be used to perform a Zero or Span adjustment of the
transmitter. Caution should be taken to ensure these adjustments are only made when the correct input
pressures are applied.
4.3.1 Zero Adjustment
This adjustment is the same as performing a Set LRV using the Display.
1. Connect a current meter or voltmeter as shown in Figure 16 to monitor the PV output of the
transmitter.
2. Using an accurate pressure source, apply pressure equivalent to the transmitter LRV.
3. Press the Down () and Zero () buttons together to set the Zero.
4. Verify that the output is now 4 mA.
4.3.2 Span Adjustment
This adjustment is the same as performing a Set URV using the Display.
1. Connect a current meter or voltmeter as shown in Figure 16 to monitor the PV output of the
transmitter.
2. Using an accurate pressure source, apply pressure equivalent to the desired Upper Range Value of
the transmitter.
3. Press the Down () and Span () buttons together to set the span.
4. Verify that the PV output is now 20 mA.
You can also use the HVC to make any adjustments to an ST 800 SmartLine pressure
transmitter. Alternately, certain adjustments are possible through an Experion Station or
Universal Station, if the ST 800 is digitally integrated with either of these stations.
To Next Page
Loading...
Need help?
General
