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SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
A5E33329501
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2.11.4.4. Relay Duration
The time in seconds from one change of state in the relay to the next.
This value must be less than the
or the relay will never
reset.
2.11.4.5. Assigned Relay
Determines the relay assigned to flow sampler control.
2.11.4.6. Relay Logic
Use to change the behaviour of the relay assigned to flow sampler control.
Relay contact operation is NORMALLY CLOSED for alarms and NORMALLY
OPEN for controls.
By default a control contact is Normally Open. For
the
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
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.
Alternatively, enter the current sound velocity (if known), or perform an
calibration. Value is always reported in m/s.
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.
Values
Range: 0.1 to 1024.0
Default: 0.2
Options
*
RELAY 1
RELAY 2
RELAY 3
Options
*
NORMALLY OPEN
NORMALLY CLOSED
Note: Default settings in the parameter tables are indicated with an asterisk (*)
unless explicitly stated.
Values
Range: 125.000 to 20000.000 m/s
Default: 344.130 m/s
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