Siemens SITRANS LUT400 Operating Instructions Manual page 188

2.11.4.4. Relay Duration
The time in seconds from one change of state in the relay to the next.
Values
This value must be less than the
reset.
2.11.4.5. Assigned Relay
Determines the relay assigned to flow sampler control.
Options
2.11.4.6. Relay Logic
Use to change the behaviour of the relay assigned to flow sampler control.
Options
Relay contact operation is NORMALLY CLOSED for alarms and NORMALLY
OPEN for controls.
By default a control contact is Normally Open. For
corresponding relay coil is energized. By setting this parameter to Normally
Closed, the relay coil will be de-energized for the activation phase.
2.12. Signal Processing
Note: Default settings in the parameter tables are indicated with an asterisk (*)
unless explicitly stated.
2.12.1. Temperature and Velocity
2.12.1.1. Sound Velocity
The value adjusted based on the Sound Velocity at 20 degrees C (2.12.1.5.)
vs. Process Temperature (2.12.1.2.) characteristics of air.
Values
Alternatively, enter the current sound velocity (if known), or perform an
2. 1 2. 1 .6.Auto Sound Velocity
2.12.1.2. Process Temperature
View the transducer temperature in °C.
If Temperature Source (2.12.1.3.) is set to any value other than Fixed
Temperature (2.12.1.4.), the value displayed is the temperature measured. If
Temperature Source is set to Temp Fixed, the Fixed Temperature (2.12.1.4.)
value is displayed.
Page 180 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
Range: 0.1 to 1024.0
Default: 0.2
2.11.4.3.Interval
* RELAY 1
RELAY 2
RELAY 3
* NORMALLY OPEN
NORMALLY CLOSED
Range: 125.000 to 20000.000 m/s
Default: 344130 m/s
calibration. Value is always reported in m/s.
or the relay will never
2.11.4.3.Interval
the
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