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5.1.1.
Status indication signals in measuring mode
HART respond signals
LED status signals on the unit
The properly installed device with factory default settings gives the following responses
to the COM3 universal HART command:
primary value
Level
secondary value
Level
tertiary value
Distance
quaternary value
Temperature
(See P01 programming).
Green LED
COM
Lights up during HART programming.
Red LED
ECHO
Lights up when the device gets proper echoes.
5.2.
Special Conditions of Ex use
–
The apparatus nor any part of it is not suitable as a fire resistant barrier for the Zone 20 area. The equipment is not allowed to be installed in the dust path of
the pneumatic filling!
–
The instrument should be grounded by all its grounding screws to the EP system in order to avoid electrostatic charges.
–
For connecting the cable of the level transmitter, a suitable terminal box should be selected in accordance to the electrical classification of the area and the
cable outside the unit should be fixed so that it is tension-free.
–
As a result of the mounting arrangement of the unit the ambient temperature is equal to the process temperature.
–
The current output should be connected to a galvanic isolator.
5.3.
Programming
HART interface of the EasyTREK enables full access and programming of the complete parameter set.
Parameters can be accessed by two ways:
With the aid of EView configuration software run on PC
By the NIVELCO made MultiCONT multichannel controller
This instruction describes parameters and features behind them but does not deal with technical details for their selection and editing of their values. Compact
Disk attached to the transmitter contains detailed information on the Eview configuration software (to install on PC) and its description. Programming by the
MultiCONT can be taken from its Installation and Programming Manual.
Continuous measuring is going on during programming in accordance with the last programmed parameter set. This way the analogue output signal
(4…20 mA) continuously represents the actual value. The digital (HART) communication depends on the communication software. The new, modified
parameter set will be valid after returning to measurement mode. The device changes back to measurement mode automatically in 1 minute after
programming through HART communication has been finished or discontinued.
Summary of Contents for EasyTREK SCD-31 4 Series
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