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10.1.4 Operating modes
Simulation
Current simulation:
In order to test the devices connected in series, a fixed output
current of 3.9 to 22 mA can be set. After the test, the current value
0 mA must be entered to end simulation.
Alarm 21.8 mA:
An alarm signal can be transmitted via the current loop.
The current then rises to 21.8 mA. This alarm is generated due to a
maloperation of the DIMF. The alarm function can be switched off.
Selection of
measured variable:
The measured variable has been assigned to the HART
primary variable and
thus to the current output. When displaying density, the user can change
between operating or reference density. When calculating the concentration,
the user can select between the two different methods.
10.1.5 Special settings
Electronic adjustment
Calibrate current output: The characteristic of the analog current output can be calibrated in its zero
point at 4 mA and in its slope at 20 mA. It must be observed that the zero point
will be calibrated before the upper range value.
Reset device:
With this command, the device can be restored to a defined operating state
present after the supply voltage was applied.
10.2 Operation with the keys (configuration via the control unit)
To access the keys, the screw cover of the longer end of the housing must be opened. When the housing
cover has been opened, the degree of protection of the housing is not ensured.
After the configuration has been completed, the housing cover must be remounted and the screws must
be fastened fingertight (be careful not to damage the sealing ring).
For the Exd version the housing may only be removed after it has been ensured that
there is no explosive atmosphere.
The covers of the Exd version are secured against opening. In order to open the cover, the locking bar
must be swiveled sideways and clamped in this position. After closing the covers, they must be
resecured.
10.2.1 Display
The transmitter type TR has a two-line display with 8 digits for each line. Each line is subdivided into two
fields:
- in the 1
st
field the channel no. is displayed (1 digit)
- in the 2
nd
field the corresponding measured values
or the constants are displayed (7 digits).
The values displayed in the upper line cannot be changed. The values displayed in the lower line
(programming line) can be changed.
The activated line is marked with a triangle behind the channel number. By pressing the ENTER key, you
can toggle between the lines.
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