Zero Adjustment; Configuration - Emerson Fisher FIELDVUE L2t Instruction Manual

L2t Liquid Level Controller
October 2023

Zero Adjustment

If the entire control band needs to be adjusted, for example, to work in a sight glass range, refer to the following
procedure.
1. Loosen the Zero Adjustment hex nut (key 5) (shown in figure 12).
2. Move the Zero Adjustment as needed to attain the desired range.
3. Tighten the Zero Adjustment hex nut (key 5) to lock the Zero setting.

Configuration

Note
An Emerson handheld communicator can provide access to configuration and setup information, as well as various service tools.
Note
Trip Recovery Mode should be set to Auto. If set to Manual and the device trips on sensor out of range it will lock and remain
locked until reset via DD or cycle power.
Smart Instruments are considered universal; they can be used with any final control element from any manufacturer.
The default factory configuration of universal instruments may not fit or suit the application, therefore the ability to
change or alter the device configuration is necessary.
This section describes the transmitters advanced features and parameters that can be accessed with a handheld
communicator. See figure 6, 7, 8, and 9 for the menu structure.
Note
Various menu items/parameters within the menu structure are defined alphabetically on the following pages.
Calibrate Time Delay
The transmitter captures the first end point and stores it indefinitely until the second end point is captured. This is
used to provide baseline time for open/closed diagnostics/alerts.
Close State Dwell Time is the length of time, in seconds, the position remained in the closed state.
Cycle Counter
The capability of the instrument to record the number of times the travel changes direction. The change in direction
must occur after the deadband has been exceeded before it can be counted as a cycle.
Deadband (Limit Switch): The difference between the trip and reset points of a relay, set in percent (%).
Descriptor
Enter a descriptor for the application with up to 16 characters. The descriptor provides a longer user-defined electronic
label to assist with more specific instrument identification than is available with the Tag.
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Instruction Manual
D104782X012